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www.irf.com | ? 2014 international rectifier january ?? 9, ? 2015 ??? | ?? v1.2 1 ir3537 ? CHL8510 12v ? hi g h ? performance ? gate ? driver ? features ? ? drives ? both ? high \ side ? and ? low \ side ? mosfets ? in ? a ? synchronous ? buck ? configuration ? ? large ? drivers ? designed ? to ? drive ? 6nf ? server ? class ? fets ? o low \ side ? driver ? C ? 4a ? source ? / ? 6a ? sink ?? o high \ side ? driver ? C ? 3a ? source ? / ? 4a ? sink ?? o transition ? times ? & ? propagation ? delays ? < ? 20ns ? ? independent ? variable ? gate ? drive ? voltage ? for ? both ? high \? and ? low \ side ? drivers ?? from ? 4.5v ? to ? 13.2v ? o improves ? efficiency ? o compatible ? with ? ir ? controller ? vgd ? feature ?? ? integrated ? bootstrap ? diode ? o reduces ? external ? component ? count ?? ? capable ? of ? high ? switching ? frequencies ? from ? 200khz ? up ? to ? 1mhz ? ? configurable ? pwm ? modes ? of ? operation ? o ir ? active ? tri \ level ? (atl), ? disables ? both ? mosfets ? in ? 30ns ? with ? no ? hold \ off ? time ? o generic ? tri \ state ? pwm ? with ? hold \ off ? ? adaptive ? non \ overlap ? protection ? minimizes ? diode ? conduction ? time ? ? input ? supply ? under ? voltage ? protection ? ? thermally ? enhanced ? 10 \ pin ? dfn ? package ? ? lead ? free ? rohs ? compliant ? package, ? msl ? level ? 1 ? applications ? ? multiphase ? synchronous ? buck ? converter ? for ?? server ? and ? desktop ? computers ? using ? intel? ? and ? amd? ? vr ? solutions ? ? high ? efficiency ? and ? compact ? vrm ? ? high ? current ? dc/dc ? converters ? basic ? application ? ? figure ? 1: ? basic ? applications ? circuit ? description ? the ? ir3537/CHL8510 ? is ? a ? high ? efficiency ? gate ? driver ? which ? can ? switch ? both ? high \ side ? and ? low \ side ? n \ channel ? external ? mosfets ? in ? a ? synchronous ? buck ? converter. ? it ? is ? intended ? for ? use ? with ? international ? rectifiers ? digital ? pwm ? controllers ? to ? provide ? a ? total ? voltage ? regulator ? (vr) ? solution ? for ? todays ? advanced ? computing ? applications. ?? the ? ir3537/CHL8510 ? low \ side ? driver ? is ? capable ? of ? rapidly ? switching ? large ? mosfets ? with ? low ? r ds(on) ? and ? large ? input ? capacitance ? used ? in ? high ? efficiency ? designs. ??? the ? ir3537/CHL8510 ? features ? individual ? control ? of ?? both ? the ? high \ and ? low \ side ? gate ? drive ? voltages ? from ?? 4.5v ? to ? 13.2v. ? this ? enables ? the ? optimization ? of ? switching ? and ? conduction ? losses ? in ? the ? external ? mosfets. ? when ? used ? with ? irs ? proprietary ? variable ? gate ? drive ? (vgd) ? technology, ? a ? significant ? improvement ? in ? efficiency ? is ? observed ? across ? the ? entire ? load ? range. ? the ? ir3537/CHL8510 ? can ? be ? configured ? to ? drive ? both ? the ? high \? and ? low \ side ? switches ? from ? the ? unique ? ir ? fast ? active ? tri \ level ? (atl) ? pwm ? signal ? or ? a ? generic ? tri \ state ? pwm ? mode. ? the ? ir ? atl ? mode ? allows ? the ? controller ? to ? disable ? the ? high \? and ? low \ side ? fets ? in ? less ? than ? 30ns ? without ? the ? need ? for ? a ? dedicated ? disable ? pin. ? this ? improves ? vr ? transient ? performance, ? especially ? during ? load ? release. ?? the ? integrated ? bootstrap ? diode ? reduces ? external ? component ? count. ? the ? ir3537/CHL8510 ? also ? features ?? an ? adaptive ? non \ overlap ? control ? for ? shoot \ through ? protection. ? this ? prevents ? cross ? conduction ? of ? both ? high \ side ? and ? low \ side ? mosfets ? and ? minimizes ? body ? diode ? conduction ? time ? to ? provide ? the ? best ? in ? class ? efficiency. ? pin ? diagram ? ? figure ? 2: ? ir3537/CHL8510 ? package ? top ? view ?? downloaded from: http:///
www.irf.com | ? 2014 international rectifier january ?? 9, ? 2015 ??? | ?? v1.2 2 ir3537 ? CHL8510 12v ? hi g h ? performance ? gate ? driver ? ordering ? information ? ?? ir3537 ? m ? ? ? ? ? ? ? ? ? ? ?? ???????? ?? ? ?? CHL8510 ? ? ? ? ? ? ? ?? ???????? ?? ? package ? tape ? & ? reel ? qty ? part ? number ? dfn ? 3000 ? ir3537mtrpbf ? dfn ? 750 ? ir3537mtr1pbf ? ?? ? ? ? package ? tape ? & ? reel ? qty ? part ? number ? dfn ? 3000 ? CHL8510crt ? pbf ? C ? lead ? free ?? ?tr ? C ? tape ? and ? reel ?? ? package ? type ? (dfn) ? t ? C ? tape ? and ? reel ?? ?r ? C ? package ? type ? (dfn) ? ?c ? C ? operating ? temperature ? (commercial ? standard) ? downloaded from: http:///
www.irf.com | ? 2014 international rectifier january ?? 9, ? 2015 ??? | ?? v1.2 3 ir3537 ? CHL8510 12v ? hi g h ? performance ? gate ? driver ? functional ? block ? diagram ? ? figure ? 3: ? ir3537/CHL8510 ? functional ? block ? diagram ? pin ? descriptions ? pi n # pi n n am e pi n descri pt i on 1 ? boot ? floating ? bootstrap ? supply ? pin ? for ? the ? upper ? gate ? drive. ? connect ? a ? bootstrap ? capacitor ? between ?? this ? pin ? and ? the ? switch ? pin. ? the ? bootstrap ? capacitor ? provides ? the ? charge ? to ? turn ? on ? the ? upper ? mosfet. ? see ? the ? internal ? bootstrap ? device ? section ? under ? description ? for ? guidance ? in ? choosing ?? the ? capacitor ? value. ?? 2 ? hvcc ? connect ? this ? pin ? to ? vcc ? (+12v) ? or ? to ? a ? separate ? supply ? between ? 4.5v ? and ? 13.2v ? to ? provide ? a ? lower ? gate ? drive ? voltage ? on ? the ? high \ side ? mosfets. ? it ? is ? connected ? to ? the ? anode ? of ? the ? internal ? bootstrap ? diode. ? place ? a ? high \ quality ? low ? esr ? ceramic ? capacitor ? from ? this ? pin ? to ? gnd. ? 3 ? pwm ? the ? pwm ? signal ? is ? the ? control ? input ? for ? the ? driver ? from ? a ? 1.8v ? or ? 3.3v ? pwm ? signal. ? the ? pwm ? signal ? can ? enter ? three ? distinct ? states ? during ? operation; ? see ? the ? three \ state ? pwm ? input ? section ? under ? description ? for ? further ? details. ? connect ? this ? pin ? to ? the ? pwm ? output ? of ? the ? controller. ? 4 ? vcc ? connect ? this ? pin ? to ? a ? +12v ? bias ? supply. ? place ? a ? high ? quality ? low ? esr ? ceramic ? capacitor ? from ? this ?? pin ? to ? gnd. ? 5 ? lvcc ? connect ? this ? pin ? to ? vcc ? (+12v) ? or ? a ? separate ? supply ? voltage ? between ? 4.5v ? and ? 13.2v ? to ? vary ? the ? drive ? voltage ? on ? the ? low \ side ? mosfets. ? place ? a ? high \ quality ? low ? esr ? ceramic ? capacitor ? from ? this ? pin ? to ? gnd. ??? this ? pin ? must ? always ? be ?? vcc+0.7vdc. ? 6 ? lo_gate ? lower ? gate ? drive ? output. ? connect ? to ? gate ? of ? the ? low \ side ? power ? n \ channel ? mosfet. ?? 7 ? gnd ?? bias ? and ? reference ? ground. ? all ? signals ? are ? referenced ? to ? this ? node. ? it ? is ? also ? the ? power ? ground ? return ?? of ? the ? driver. ?? 8 ? mode ? this ? pin ? allows ? selection ? of ? the ? pwm ? signal ? voltage ? for ? 1.8v ? or ? 3.3v ? normal ? operation. ? floating ? this ? pin ? configures ? the ? driver ? for ? ir ? active ? tri \ level ? (atl) ? using ? 1.8v ? pwm, ? and ? connecting ? this ? pin ? to ? ground ? configures ? the ? driver ? for ? generic ? active ? tri \ state ? operation ? using ? 3.3v ? pwm. ? 9 ? switch ? connect ? this ? pin ? to ? the ? source ? of ? the ? upper ? mosfet ? and ? the ? drain ? of ? the ? lower ? mosfet. ? this ? pin ? provides ? a ? return ? path ? for ? the ? upper ? gate ? drive. ? 10 ? hi_gate ? upper ? gate ? drive ? output. ? connect ? to ? gate ? of ? high \ side ? power ? n \ channel ? mosfet. ?? pad ? (11) ? gnd ? bias ? and ? reference ? ground. ? all ? signals ? are ? referenced ? to ? this ? node. ? it ? is ? also ? the ? power ? ground ? return ? of ? the ? driver. ? por, reference and control shoot through control lvcc lo_gate hi_gate gnd switch pwm vcc boot mode hvcc downloaded from: http:///
www.irf.com | ? 2014 international rectifier january ?? 9, ? 2015 ??? | ?? v1.2 4 ir3537 ? CHL8510 12v ? hi g h ? performance ? gate ? driver ? typical ? applications ? block ? diagrams ? ? figure ? 4: ? 6 \ phase ? voltage ? regulator ? using ? ir3537/CHL8510 ? mosfet ? drivers ? & ? chl8316 ? controller ? downloaded from: http:///
www.irf.com | ? 2014 international rectifier january ?? 9, ? 2015 ??? | ?? v1.2 5 ir3537 ? CHL8510 12v ? hi g h ? performance ? gate ? driver ? absolute ? maximum ? ratings ? boot ? +35.0v ? reference ? to ? gnd, ? +15v ? reference ? to ? switch ? pwm ? +7.0v ? vcc, ? hvcc ? +15.0v ?? lvcc ? vcc+0.7vdc ? to ? a ? maximum ? of ? +15.0v ? lo_gate ? dc: ?\ 0.3v ? to ? <0.3v ? above ? vcc, ? <200ns: ?\ 2v ? to ? <0.3v ? above ? vcc ? gnd ? 0v+/ \? 0v ? switch ? dc: ?\ 0.3v ? to ? +15v, ? <20ns: ? 25v, ? <5ns: ?\ 10v, ?? <20 ? ns: ?\ 4vdc ? and ? <200 ? ns: ?\ 2vdc ? hi_gate ? dc: ? switch ? C ? 0.3v ? to ? 0.3v ? above ? vboot, ? <200ns: ? switch ? C ? 2v ? to ? 0.3v ? above ? vboot ? mode ? \ 0.3v ? to ? +15.0v ? esd ? C ? charged ? device ? model ? jesd22 \ c101 \ c ? passes ? +/ \ 1000v ? thermal ? information ? thermal ? resistance ? ( jc ) ? 3c/w ? thermal ? resistance ? ( ja ) 1 ? 45c/w ? maximum ? operating ? junction ? temperature ? 150c ? maximum ? storage ? temperature ? range ?\ 65c ? to ? 150c ? maximum ? lead ? temperature ? (soldering ? 10s) ? 300c ? ?note ? 1: ? ja ? is ? measured ? with ? the ? component ? mounted ? on ? a ? high ? effective ? thermal ? conductivity ? test ? board ? in ? free ? air. ? ?stresses ? beyond ? those ? listed ? under ? absolute ? maximum ? ratings ? may ? cause ? permanent ? damage ? to ? the ? device. ? these ? are ? stress ? ratings ? only ? and ? functional ? operation ? of ? the ? device ? at ? these ? or ? any ? other ? conditions ? beyond ? those ? indicated ? in ? the ? operational ? sections ? of ? the ? specifications ? are ? not ? implied. downloaded from: http:///
www.irf.com | ? 2014 international rectifier january ?? 9, ? 2015 ??? | ?? v1.2 6 ir3537 ? CHL8510 12v ? hi g h ? performance ? gate ? driver ? electrical ?? specifications ? ? the ? electrical ? characteristics ? involve ? the ? spread ? of ? values ? guaranteed ? within ? the ? recommended ? operating ? conditions. ? typical ? values ? represent ? the ? median ? values, ? which ? are ? related ? to ? 25c. ? recommended ? operating ? conditions ? for ? reliable ? operation ? with ? margin ? recommended ? operating ? ambient ? temperature ? 0c ? to ? 85c ? recommended ? operating ? junction ? temperature ? 125c ? recommended ? supply ? voltage ? range ? +12v ? ? 10% ? recommended ? lvcc ? & ? hvcc ? range ? (note ? lvcc ? must ? be ? vcc ? +0.7vdc) ? +4.5v ? to ? 13.2v ? ? electrical ? characteristics ? parameter ? symbol ? conditions ? min ? typ ? max ? unit ? supply ? supply ? bias ? current ? i vcc ? f pwm ? = ? 300khz, ?? v vcc ? = ? 12v, ? no ? load ? \? 7.0 ?\ ? ma ? quiescent ? bias ? current ? i dd ?? \ ? 5.0 ?\ ? ma ? vcc ? rising ? threshold ? for ? por ?? ? \ ? 8.6 ?\ ? v ? vcc ? falling ? threshold ? for ? por ?? ? \ ? 7.1 ?\ ? v ? pwm ? input ? active ? tri \ level ? mode ? (see ? figure ? 5) ?? pwm ? input ? high ? threshold ?? v ih(c_pwm) ? vcc ? = ? 12v ?? \? 1.0 ?\ ? v ?? pwm ? input ? low ? threshold ?? v il(c_pwm) ? vcc ? = ? 12v ?? \? 0.8 ?\ ? v ?? pwm ? tri \ level ? hi ? threshold ? v tl(c_pwm) ? vcc ? = ? 12v ?? \? 2.65 ?\ ? v ? pwm ? tri \ level ? low ? threshold ? v th(c_pwm) ? vcc ? = ? 12v ?? \? 2.55 ?\ ? v ? pwm ? input ? current ? low ? i c_pwm ? v pwm ? = ? 0v ?\ ? \ 0.88 ?\ ? ma ?? pwm ? input ? current ? high ?? v pwm ? = ? 3.3v ?\ ? \ 10 ?\ ? a ? pwm ? input ? tri \ state ? mode ? (see ? figure ? 6) ?? pwm ? input ? rising ? threshold ?? v ih(c_pwm) ? vcc ? = ? 12v ?? \? 1.65 ?\ ? v ?? pwm ? input ? falling ? threshold ? v il(c_pwm) ? vcc ? = ? 12v ?? \? 1.3 ?\ ? v ?? tri \ state ? lo_gate ? threshold ?? ? \ ? 0.85 ?\ ? v ?? tri \ state ? lo_gate ? hysteresis ?? ? \ ? 200 ?\ ? mv ?? tri \ state ? hi_gate ? threshold ?? ? \ ? 2.55 ?\ ? v ? tri \ state ? hi_gate ? hysteresis ?? ? \ ? 200 ?\ ? mv ? tri \ state ? hold \ off ? time, ? note ? 1 ?? ? \ ? 80 ?\ ? ns ? pwm ? input ? pull \ up ? voltage ? v pwm_pullup ? pwm ? input ? floating ?\ ? 1.65 ?\ ? v ? pwm ? input ? resistance ? r pwm ? pwm ? input ? floating ?\ ? 3.75 ?\ ? k ? downloaded from: http:///
www.irf.com | ? 2014 international rectifier january ?? 9, ? 2015 ??? | ?? v1.2 7 ir3537 ? CHL8510 12v ? hi g h ? performance ? gate ? driver ? high \ side ? gate ? driver ? transition ? time, ? rising, ? note ? 1 ? t r(hs) ? 6nf ? load, ? v vcc ? = ? 12v, ? 10% ?\? 90% ?? \? 21 ?? \? ns ?? transition ? time, ? falling, ? note ? 1 ? t f(hs) ? 6nf ? load, ? v vcc ? = ? 12v, ? 10% ?\? 90% ?? \? 18 ?\ ? ns ?? transition ? time, ? rising, ? note ? 1 ? t r(hs) ? 3nf ? load, ? v vcc ? = ? 12v, ? 10% ?\? 90% ?? \? 15 ?? \? ns ?? transition ? time, ? falling, ? note ? 1 ? t f(hs) ? 3nf ? load, ? v vcc ? = ? 12v, ? 10% ?\? 90% ?? \? 12 ?\ ? ns ?? propagation ? delay, ? turn \ on, ? note ? 1 ? t pdh(hs) ? 6nf ? load, ? v vcc ? = ? 12v, ? adaptive ?? \? 16 ?? \? ns ?? propagation ? delay, ? turn \ off, ? note ? 1 ? t pdl(ls) ? 6nf ? load, ? v vcc ? = ? 12v ?\ ? 17 ?? \? ns ?? propagation ? delay ? , ? exit ? tri \ state, ? note ? 1 ? t pdts(hs_en) ? 6nf ? load, ? v vcc ? = ? 12v ?\ ? 29 ?\ ? ns ? propagation ? delay, ? enter ? tri \ state, ? note ? 1 ? t pdts(hs_dis) ? 6nf ? load, ? v vcc ? = ? 12v ?\ ? 16 ?\ ? ns ? source ? current, ? note ? 1 ? i hs_source ? 6nf ? load, ? v vcc ? = ? 12v ?\ ? 3.0 ??? \? a ?? output ? impedance, ? sourcing ? r hs_source ? sink ? current ? at ? 100ma ?? \? 1.6 ?? \? ??? sink ? current, ? note ? 1 ? i hs_sink ? 6nf ? load, ? v vcc ? = ? 12v ?\ ? 4.0 ?? \? a ?? output ? impedance, ? sinking ? r hs_sink ? ? sink ? current ? at ? 100ma ? \? 0.6 ?\ ?? ? ? low \ side ? gate ? driver ? transition ? time, ? rising, ? note ? 1 ? t f(ls) ? 6nf ? load, ? v vcc ? = ? 12v, ? 10% ?\? 90% ??? \? 18 ?\ ? ns ?? transition ? time, ? falling, ? note ? 1 ? t r(ls) ? 6nf ? load, ? v vcc ? = ? 12v, ? 10% ?\? 90% ?? \? 13 ?\ ? ns ?? transition ? time, ? rising, ? note ? 1 ? t f(ls) ? 3nf ? load, ? v vcc ? = ? 12v, ? 10% ?\? 90% ?? \? 13 ?\ ? ns ?? transition ? time, ? falling, ? note ? 1 ? t r(ls) ? 3nf ? load, ? v vcc ? = ? 12v, ? 10% ?\? 90% ?? \? 9 ?\ ? ns ?? propagation ? delay, ? turn \ on, ? note ? 1 ? t pdh(ls) ? 6nf ? load, ? v vcc ? = ? 12v, ? adaptive ?? \? 17 ?\ ? ns ?? propagation ? delay, ? turn \ off, ? note ? 1 ? t pdl(ls) ? 6nf ? load, ? v vcc ? = ? 12v ?\ ? 13 ?? \? ns ?? propagation ? delay, ? exit ? tri \ state, ? note ? 1 ? t pdts(ls_en) ? 6nf ? load, ? v vcc ? = ? 12v ?\ ? 26 ?\ ? ns ? propagation ? delay, ? enter ? tri \ state, ? note ? 1 ? t pdts(ls_dis) ? 6nf ? load, ? v vcc ? = ? 12v ?\ ? 14 ?\ ? ns ? source ? current, ? note ? 1 ? i ls_source ? 6nf ? load, ? v vcc ? = ? 12v ?\ ? 4.0 ?? \? a ?? output ? impedance, ? sourcing ? r ls_source ? sink ? current ? at ? 100ma ?? \? 1.5 ?? \? ??? sink ? current, ? note ? 1 ?? i ls_sink ? 6nf ? load, ? v vcc ? = ? 12v ?\ ? 6 ?? \? a ?? output ? impedance, ? sinking ? r ls_sink ? ? sink ? current ? at ? 100ma ? \? 0.4 ?\ ?? ? ? note ? 1: ? guaranteed ? by ? design ? but ? not ? tested ? in ? production. ? downloaded from: http:///
www.irf.com | ? 2014 international rectifier january ?? 9, ? 2015 ??? | ?? v1.2 8 ir3537 ? CHL8510 12v ? hi g h ? performance ? gate ? driver ? timing ? diagrams ? ? ? ? figure ? 5: ? active ? tri \ level ? mode ? pwm, ? hi_gate ? and ? lo_gate ? signals ? ? ? figure ? 6: ? tri \ state ? mode ? pwm, ? hi_gate ? and ? lo_gate ? signals ? downloaded from: http:///
www.irf.com | ? 2014 international rectifier january ?? 9, ? 2015 ??? | ?? v1.2 9 ir3537 ? CHL8510 12v ? hi g h ? performance ? gate ? driver ? general ? description ? ?the ? ir3537/CHL8510 ? is ? a ? high ? efficiency, ? fast ? mosfet ? driver ? with ? large ? source ? and ? sink ? current ? capability. ? it ? can ? reliably ? drive ? the ? external ? high \? and ? low \ side ? n \ channel ? mosfets ? with ? large ? input ? capacitance ? at ? switching ? frequencies ? up ? to ? 1mhz. ? the ? proprietary ? ir ? active ? tri \ level ? (atl) ? feature ? allows ? complete ? control ? over ? enable ? and ? disable ? of ? both ? mosfets ? using ? the ? pwm ? input ? signal ? from ? the ? controller. ? the ? driver ? is ? also ? compatible ? with ? a ? generic ? tri \ state ? pwm ? signal. ? the ? active ? tri \ level ? or ? tri \ state ? is ? selectable ? by ? the ? mode ? pin. ? during ? normal ? operation ? the ? pwm ? transitions ? between ? low ? and ? high ? voltage ? levels ? to ? drive ? the ? low \? and ? high \ side ? mosfets. ? the ? pwm ? signal ? falling ? edge ? transition ? to ? a ? low ? voltage ? threshold ? initiates ? the ? high \ side ? driver ? turn ? off ? after ? a ? short ? propagation ? delay, ? t pdl(hs) . ? the ? dead ? time ? control ? circuit ? monitors ? the ? hi_gate ? and ? switch ? voltages ? to ? ensure ? the ? high \ side ? mosfet ? is ? turned ? off ? before ? the ? lo_gate ? voltage ? is ? allowed ? to ? rise ? to ? turn ? on ? the ? low \ side ? mosfet. ?? the ? pwm ? rising ? edge ? transition ? through ? the ? high \ side ? turn \ on ? threshold ? initiates ? the ? turn ? off ? of ? the ? low \ side ? mosfet ? after ? a ? small ? propagation ? delay, ? t pdl(ls). ?? the ? adaptive ? dead ? time ? circuit ? provides ? the ? appropriate ? dead ? time ? by ? determining ? if ? the ? falling ? lo_gate ? voltage ? threshold ? has ? been ? crossed ? before ? allowing ? the ? hi_gate ? voltage ? to ? rise ? and ? turn ? on ? the ? high \ side ? mosfet, ? t pdh(hs) . ? theory ? of ? operation ? power \ on ? reset ? (por) ? the ? ir3537/CHL8510 ? incorporates ? a ? power \ on ? reset ? feature. ? this ? ensures ? that ? both ? the ? high \? and ? low \ side ? output ? drivers ? are ? made ? active ? only ? after ? the ? device ? supply ? voltage ? has ? exceeded ? a ? certain ? minimum ? operating ? threshold. ? the ? vcc ? supply ? is ? monitored ? and ? both ? the ? drivers ? are ? set ? to ? the ? low ? state, ? holding ? both ? external ? mosfets ? off. ? once ? vcc ? crosses ? the ? rising ? por ? threshold, ? the ? ir3537/CHL8510 ? is ? reset ? and ? the ? outputs ? are ? held ? in ? the ? low ? state ? until ? a ? transition ? from ? tri \ state ? to ? active ? operation ? is ? detected ? at ? the ? pwm ? input. ? during ? normal ? operation ? the ? drivers ? continue ? to ? remain ? active ? until ? the ? vcc ? falls ? below ? the ? falling ? por ? threshold. ?? these ? por ? voltage ? threshold ? levels ? allow ? seamless ? functionality ? with ? international ? rectifiers ? digital ? controllers, ? such ? that ? the ? drivers ? are ? always ? active ? before ? the ? controller ? starts ? to ? provide ? the ? pwm ? signal ? and ? are ? inactive ? only ? after ? the ? controller ? shuts ? down. ? integrated ? bootstrap ? diode ?? the ? ir3537/CHL8510 ? features ? an ? integrated ? bootstrap ? diode ? to ? reduce ? external ? component ? count. ? this ? enables ? the ? ir3537/CHL8510 ? to ? be ? used ? effectively ? in ? cost ? and ? space ? sensitive ? designs. ? the ? bootstrap ? circuit ? is ? used ? to ? establish ? the ? gate ? voltage ? for ? the ? high \ side ? driver. ? it ? consists ? of ? a ? diode ? and ? capacitor ? connected ? between ? the ? switch ? and ? boot ? pins ? of ? the ? device. ? integrating ? the ? diode ? within ? the ? ir3537/CHL8510, ? results ? in ? the ? need ? for ? an ? external ? boot ? capacitor ? only. ?? the ? bootstrap ? capacitor ? is ? charged ? through ? the ? diode ? and ? injects ? this ? charge ? into ? the ? high \ side ? mosfet ? input ? capacitance ? when ? pwm ? signal ? goes ? high. ? pwm ? mode ? selection ? the ? ir3537/CHL8510 ? features ? a ? mode ? pin ? which ?? allows ? operation ? with ? different ? pwm ? signal ? levels. ?? the ? ir3537/CHL8510 ? is ? capable ? of ? driving ? external ? mosfets ? based ? on ? one ? of ? two ? different ? tri \ level ? pwm ? input ? signals ? from ? a ? controller. ?? floating ? the ? mode ? pin ? enables ? the ? ir3537/CHL8510 ? to ? switch ? external ? fets ? based ? on ? the ? ir ? active ? tri \ level ? mode. ? in ? atl ? mode, ? the ? pwm ? voltage ? level ? is ? from ? 0v ? to ? 1.8v ? for ? low ? to ? high ? transitions. ? a ? pwm ? voltage ? level ? greater ? than ? the ? tri \ state ? hi_gate ? threshold ? disables ? switching ? of ? both ? mosfets. ? grounding ? the ? mode ? pin ? enables ? the ? downloaded from: http:///
www.irf.com | ? 2014 international rectifier january ?? 9, ? 2015 ??? | ?? v1.2 10 ir3537 ? CHL8510 12v ? hi g h ? performance ? gate ? driver ? ir3537/CHL8510 ? to ? switch ? fets ? based ? on ? a ? generic ? tri \ state ? signaling ? with ? the ? pwm ? signal ? from ? 0v ? to ? 3.3v ? for ? low ? to ? high ? transitions. ? a ? pwm ? voltage ? level ? in ? the ? tri \ state ? window ? between ? 1.23v ? and ? 1.82v ? for ? 80ns ? results ? in ? disabling ? both ? external ? mosfets. ? ir ? active ? tri \ level ? pwm ? input ? signal ? the ? ir3537/CHL8510 ? gate ? drivers ? are ? driven ? by ? a ? unique ? tri \ level ? pwm ? control ? signal ? provided ? by ? the ? international ? rectifiers ? digital ? pwm ? controllers. ? during ? normal ? operation, ? the ? rising ? and ? falling ? edges ? of ? the ? pwm ? signal ? transitions ? between ? 0v ? and ? 1.8v ? to ? switch ? the ? lo_gate ? and ? hi_gate. ? to ? force ? both ? driver ? outputs ? low ? simultaneously, ? the ? pwm ? signal ? crosses ? a ? tri \ state ? voltage ? level ? higher ? than ? the ? tri \ state ? hi_gate ? threshold. ? this ? threshold ? based ? tri \ state ? results ? in ? a ? very ? fast ? disable ? with ? only ? a ? small ? tri \ state ? propagation ? delay. ? mosfet ? switching ? resumes ? when ? the ? pwm ? signal ? falls ? below ? the ? tri \ state ? threshold ? into ? the ? normal ? operating ? voltage ? range. ?? this ? fast ? tri \ state ? operation ? eliminates ? the ? need ? for ? the ? pwm ? signal ? to ? dwell ? in ? the ? shutdown ? window, ? eliminating ? any ? hold \ off ? time. ? in ? addition, ? the ? disable ? delay ? time ? is ?? not ? affected ? by ? the ? pwm ? trace ? routing ? capacitance. ?? a ? dedicated ? enable ? pin ? is ? not ? required ? which ? simplifies ? the ? routing ? and ? layout ? in ? applications ? with ? a ? limited ? number ?? of ? board ? layers. ? it ? also ? provides ? switching ? free ? of ? shoot ? through ? for ? pwm ? transition ? times ? of ? up ? to ? 20ns. ? the ? ir3537/CHL8510 ? is ? therefore ? tolerant ? of ? stray ? capacitance ? on ? the ? pwm ? signal ? lines. ? the ? ir3537/CHL8510 ? provides ? a ? 0.88ma ? typical ? pull \ up ? current ? to ? drive ? the ? pwm ? input ? to ? the ? tri \ state ? condition ? of ? 3.3v ? when ? the ? pwm ? controller ? output ? is ? in ? its ? high ? impedance ? state. ? the ? 0.88ma ? typical ? current ? is ? designed ? for ? driving ? worst ? case ? stray ? capacitances ? and ? transition ? the ? ir3537/CHL8510 ? into ? the ? tri \ state ? condition ? rapidly ? to ? avoid ? a ? prolonged ? period ? of ? conduction ? of ? the ? high \? or ? low \ side ? mosfets ? during ? faults. ? once ? the ? pwm ? signal ? has ? been ? pulled ? up, ? the ? current ? is ? disabled ? to ? reduce ? power ? consumption. ? diode ? emulation ? during ? load ? release ? one ? advantage ? of ? atl ? is ? the ? ability ? to ? quickly ? turn \ off ? all ? low \ side ? mosfets ? during ? a ? load ? release ? event. ? this ? is ? known ? as ? diode ? emulation ? since ? all ? the ? load ? current ? is ? forced ? to ? flow ? momentarily ? through ? the ? body ? diodes ? of ? the ? mosfets. ? this ? results ? in ? a ? much ? lower ? overshoot ? on ? the ? output ? voltage ? as ? can ? be ? seen ? in ? figure ? 7. ? figure ? 7: ? output ? voltage ? overshoot ? reduction ?? with ? body \ braking ? start ? up ? during ? initial ? startup, ? the ? ir3537/CHL8510 ? holds ? both ?? high \? and ? low \ side ? drivers ? low ? even ? after ? por ? threshold ? is ? reached. ? this ? mode ? is ? maintained ? while ? the ? pwm ? signal ? is ? pulled ? to ? the ? tri \ state ? threshold ? level ? greater ? than ? the ?? tri \ state ? hi_gate ? threshold ? and ? until ? it ? transitions ? out ? of ? tri \ state. ? it ? is ? this ? initial ? transition ? out ? of ? the ? tri \ state ? which ? enables ? both ? drivers ? to ? switch ? based ? on ? the ? normal ? pwm ?? voltage ? levels. ?? this ? startup ? also ? ensures ? that ? any ? undetermined ? pwm ? signal ? levels ? from ? a ? controller ? in ? pre \ por ? state ? will ? not ? result ? in ? high ? or ? low \ side ? mosfet ? turn ? on ? until ? the ? controller ? is ? out ? of ? its ? por. ? note: ?? the ? CHL8510/ir3537 ? driver ? requires ? that ? the ? lvcc ? and ? vcc ? supply ? voltages ? be ? sequenced ? and ? operated ? under ? all ? start \ up, ? operating, ? and ? shutdown ? conditions ? such ? that ? vcc ? is ? always ? greater ? than ? lvcc ?\ 0.7vdc. ??? failure ? to ? do ? this ? properly ? can ? cause ? catastrophic ? damage ? to ? the ? CHL8510/ir3537 ? driver. ? ? high \ side ? driver ? the ? high \ side ? driver ? drives ? an ? external ? floating ? n \ channel ? mosfet ? which ? can ? be ? switched ? at ? up ? to ? 1mhz. ? an ? external ? bootstrap ? circuit ? referenced ? to ? the ? switch ? node, ? consisting ? of ? a ? boot ? diode ? and ? capacitor ? is ? used ? to ? bias ? the ? external ? mosfet ? gate. ? when ? the ? switch ? node ?? is ? at ? ground, ? the ? boot ? capacitor ? is ? charged ? to ? the ? voltage ? on ? the ? hvcc ? pin ? less ? the ? forward ? drop ? of ? the ? diode. ? this ? stored ? charge ? is ? used ? to ? turn ? on ? the ? high \ side ? mosfet ? when ? the ? pwm ? signal ? goes ? high. ? once ? the ? high \ side ? mosfet ? is ? turned ? on, ? the ? switch ? voltage ? is ? raised ? to ? the ? supply ? voltage, ? and ? the ? boot ? voltage ? is ? equal ? to ? the ? i_out 105a to 10a v_out without diode emulation overshoots ~25mv over 0a level i_out 105a to 10a v_out without diode emulation overshoots ~25mv over 0a level v_out with diode emulation overshoot within 0a level results in reduction of 30mv overshoot downloaded from: http:///
www.irf.com | ? 2014 international rectifier january ?? 9, ? 2015 ??? | ?? v1.2 11 ir3537 ? CHL8510 12v ? hi g h ? performance ? gate ? driver ? supply ? voltage ? plus ? the ? hvcc ? voltage ? less ? the ? diode ? forward ? voltage. ? when ? the ? pwm ? signal ? goes ? low, ? the ? mosfet ? is ? turned ? off ? by ? pulling ? the ? mosfet ? gate ? to ? the ? switch ? voltage. ? low \ side ? driver ? the ? ir3537/CHL8510 ? low \ side ? driver ? is ? designed ? to ? drive ? an ? external ? n \ channel ? mosfet ? referenced ? to ? ground ? at ? up ? to ? 1mhz. ? the ? low \ side ? driver ? is ? connected ? internally ? to ? the ? lvcc ? supply ? voltage. ? adaptive ? dead ? time ? adjustment ? in ? a ? synchronous ? buck ? configuration, ? dead ? time ? between ? the ? turn ? off ? of ? one ? gate ? and ? turn ? on ? of ? the ? other ? is ? necessary ? to ? prevent ? simultaneous ? conduction ? of ? the ? external ? mosfets ? preventing ? a ? shoot \ through ? condition ? which ? would ? result ? in ? a ? short ? of ? the ? supply ? voltage ? to ? ground. ? a ? fixed ? dead ? time ? does ? not ? provide ? optimal ? performance ? across ? a ? variety ? of ? mosfets ? and ? board ? layouts. ? the ? ir3537/CHL8510 ? provides ? an ? adaptive ? dead ? time ? adjustment. ? this ? feature ? minimizes ? dead ? time ? which ? maximizes ? efficiency. ? the ? break ? before ? make ? adaptive ? design ? is ? achieved ? by ? monitoring ? gate ? and ? switch ? voltages ? to ? determine ? off ? status ? of ? a ? mosfet. ? it ? also ? provides ? zero \ voltage ? switching ? (zvs) ? of ? the ? low \ side ? mosfet ? with ? minimum ? current ? conduction ? through ? its ? body \ diode. ?? when ? the ? pwm ? is ? switching ? between ? 1.8v ? and ? 0v, ? its ? falling ? edge ? transition ? from ? high ? to ? low ? will ? turn ? off ? the ? high \ side ? gate ? driver. ? the ? adaptive ? dead ? time ? circuit ? monitors ? the ? hi_gate ? and ? the ? switch ? node ? voltages ? during ? the ? high \ side ? mosfet ? turn ? off. ? when ? the ? hi_gate ? falls ? below ? 1.7v ? above ? the ? switch ? node ? potential ? or ? the ? switch ? node ? voltage ? drops ? below ? 0.8v, ? the ? high \ side ? mosfet ? is ? determined ? to ? be ? turned ? off, ? and ? the ? lo_gate ? turn \ on ? is ? initiated. ? this ? turns ? on ? the ? external ? low \ side ? mosfet. ? the ? rising ? edge ? transition ? of ? the ? pwm ? signal ? from ? low ? to ? high ? voltage ? causes ? the ? low \ side ? gate ? driver ? to ? turn ? off. ? the ? adaptive ? circuit ? monitors ? the ? voltage ? at ? lo_gate ? and ? when ? it ? falls ? below ? 1.7v, ? the ? low \ side ? mosfet ? is ? turned ? off, ? and ? the ? high \ side ? mosfet ? turn \ on ? is ? initiated. ? this ? turns ? on ? the ? external ? high \ side ? mosfet. ? independent ? variable ? gate ? voltage ? the ? ir3537/CHL8510 ? features ? independent ? variable ?? gate ? voltages ? for ? both ? the ? high \? and ? low \ side ? drivers. ?? this ? enables ? implementation ? of ? the ? variable ? gate ? drive ? (vgd) ? feature ? in ? vr ? circuits ? using ? the ? ir ? multiphase ? controllers ? to ? improve ? efficiency. ?? the ? voltage ? applied ? to ? the ? hvcc ? and ? lvcc ? pins ? of ? ir3537/CHL8510 ? determines ? the ? gate ? voltage ? on ? the ? external ? mosfets. ? these ? pins ? may ? be ? powered ? from ? independent ? voltage ? sources ? or ? tied ? together ? to ? a ? common ? voltage ? source. ? variation ? in ? the ? gate ? voltage ? allows ? efficiency ? to ? be ? optimized ? across ? the ? load ? current ? range ? by ? trading ? off ? conduction ? and ? switching ? losses. ? increasing ? the ? voltage ? across ? a ? mosfet ? gate, ? results ? in ? reduced ? r dson ? which ? lowers ? the ? mosfet ? conduction ? losses, ? but ? also ? raises ? the ? gate ? charge ? which ? increases ? the ? switching ? losses. ? the ? voltage ? on ? each ? hvcc ? and ? lvcc ? pin, ? and ? thus ? the ? gate ? drive ? voltage ? of ? the ? CHL8510, ? can ? be ? varied ? from ? 4.5v ? to ? 13.2v. ?? the ? international ? rectifiers ? digital ? multiphase ? controllers ? provide ? a ? unique ? var_gate ? output ? which ? varies ? inversely ? with ? the ? vr ? output ? current. ? the ? var_gate ? output ? is ? designed ? to ? be ? used ? with ? an ? external ? circuit ? and ? provide ? the ? optimum ? voltage ? across ? the ? ir3537/CHL8510s ? hvcc ? and ? lvcc ? pins ? for ? optimum ? system ? efficiency ? across ? the ? load ? range. ? ? downloaded from: http:///
www.irf.com | ? 2014 international rectifier january ?? 9, ? 2015 ??? | ?? v1.2 12 ir3537 ? CHL8510 12v ? hi g h ? performance ? gate ? driver ? application ? information ? ?figure ? 1 ? shows ? the ? typical ? applications ? circuit ? for ? the ? ir3537/CHL8510. ? bootstrap ? circuit ? once ? the ? high \ side ? mosfet ? selection ? is ? made, ? the ? bootstrap ? circuit ? can ? be ? defined. ? the ? integrated ? boot ? diode ? of ? the ? ir3537/CHL8510 ? reduces ? the ? external ? component ? count ? in ? cost ? and ? space ? sensitive ? designs. ? for ? ultra ? high ? efficiency ? designs, ? an ? external ? bootstrap ? diode ? is ? recommended. ?? the ? bootstrap ? capacitor ? c boot ? stores ? the ? charge ? and ? provides ? the ? voltage ? required ? to ? drive ? the ? external ? high \ side ? mosfet ? gate. ? the ? minimum ? capacitor ? value ? can ? be ? defined ? by: ? c boot ? = ? q hs_mosfet_gate ? / ?? v boot ? ? where, ? ? q hs_mosfet_gate ? is ? the ? total ? gate ? charge ? of ? the ?? high \ side ? external ? mosfet(s) ? ? ? v boot ? is ? the ? droop ? allowed ? on ? the ? bootstrap ? capacitor ? voltage ? (at ? the ? high \ side ? mosfet ? gate) ? if ? an ? external ? bootstrap ? diode ? is ? used, ? d boot ? must ? be ? capable ? of ? handling ? the ? average ? and ? peak ? currents, ? i d_avg ? and ? i d_peak , ? and ? also ? the ? maximum ? supply ? voltage. ? i d_avg ? = ? q hs_mosfet_gate ?? x ? f sw_max ? ? where, ??? ? f sw_max ?? is ? the ? controllers ? maximum ? switching ? frequency. ? the ? i d_peak ? rating ? of ? the ? diode ? is ? determined ? by ? actual ? circuit ? measurements. ? the ? i d_peak ? rating ? of ? the ? diode ? is ? determined ? by ? actual ? circuit ? measurements. a ? series ? resistor ? (r boot ) ? of ? 1 ? to ? 4 , ? is ? added ? to ? limit ?? the ? surge ? current ? into ? the ? boot ? capacitor ? on ? start \ up. ?? this ? resistor ? can ? also ? be ? used ? to ? set ? the ? rising ? slew ? rate ? of ? the ? high \ side ? mosfet ? gate ? drive ? (hi_gate) ? to ? help ? slow ? the ? rise ? time ? of ? the ? switch ? node ? for ? reduced ? ringing. ? supply ? decoupling ? capacitor ? decoupling ? to ? the ? ir3537/CHL8510 ? is ? provided ? by ? a ? bypass ? capacitor ? c vcc ? located ? close ? to ? the ? supply ? input ? pin. ? a ? 1f, ? low ? esr, ? multilayer ? ceramic ? capacitor ? is ? recommended. ?? a ? series ? resistor ? rvcc, ? typically ? 10 , ? is ? added ? in ? series ?? with ? the ? supply ? voltage ? to ? filter ? high ? frequency ? ringing ?? and ? noise. ? pcb ? layout ? considerations ? pcb ? layout ? and ? design ? is ? important ? to ? driver ? performance ? in ? voltage ? regulator ? circuits ? due ? to ? the ? high ? current ? slew ? rate ? (di/dt) ? during ? mosfet ? switching. ? ? locate ? all ? power ? components ? in ? each ? phase ? as ? close ? to ? each ? other ? as ? practically ? possible ? in ? order ? to ? minimize ? parasitics ? and ? losses, ? allowing ? for ? reasonable ? airflow. ? ? input ? supply ? decoupling ? and ? bootstrap ? capacitors ? should ? be ? physically ? close ? to ? their ? respective ? ic ? pins. ? ? high ? current ? paths ? like ? the ? gate ? driver ? traces ? should ? be ? as ? wide ? and ? short ? as ? practically ? possible. ? ? trace ? inductances ? to ? the ? high \? and ? low \ side ? mosfets ? should ? be ? minimized. ? ? the ? ground ? connection ? of ? the ? ic ? should ? be ? as ? close ? as ? possible ? to ? the ? low \ side ? mosfet ? source. ? ? use ? of ? a ? copper ? plane ? under ? and ? around ? the ? ic ? and ? thermal ? vias ? connected ? to ? buried ? copper ? layers ? improves ? the ? thermal ? performance. downloaded from: http:///
www.irf.com | ? 2014 international rectifier january ?? 9, ? 2015 ??? | ?? v1.2 13 ir3537 ? CHL8510 12v ? hi g h ? performance ? gate ? driver ? marking ? information ? figure ? 8: ? marking ? information ? for ? CHL8510 ? ? ???? figure ? 9: ? marking ? information ? for ? ir3537 ? ?? ? ? ? ? ? ? ? ? ? ? ? ? ? 8510 zzz-xx ayyww part # lot & wafer code assembler/date code pin 1 3537 ywlcx pin 1 part # date/lot/marking code a assembly site code downloaded from: http:///
www.irf.com | ? 2014 international rectifier january ?? 9, ? 2015 ??? | ?? v1.2 14 ir3537 ? CHL8510 12v ? hi g h ? performance ? gate ? driver ? package ? information ? ? figure ? 10: ? dfn ? 3x3mm, ? 10 \ pin ? downloaded from: http:///
www.irf.com | ? 2014 international rectifier january ?? 9, ? 2015 ??? | ?? v1.2 15 ir3537 ? CHL8510 12v ? hi g h ? performance ? gate ? driver ? ?? ? ? ? data ? and ? specifications ? subject ? to ? change ? without ? notice. ? this ? product ? will ? be ? designed ? and ? qualified ? for ? the ? consumer ? market. ? qualification ? standards ? can ? be ? found ? on ? irs ? web ? site. ? ir world headquarters: 233 kansas st., el segundo, california 90245, usa tel: (310) 252-7105 tac fax: (310) 252-7903 visit us at www.irf.com for sales contact information . www.irf.com ? downloaded from: http:///

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