View MP86883_8996504.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

MP86883 intelli-phase tm solution (integrated hs/ls fets and driver) in 6x6mm tqfn MP86883 rev. 1.0 www.monolithicpower.com 1 6/27/2014 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. the future of analog ic technology description the MP86883 is a monolithic half-bridge with built-in internal power mosfets and gate drivers. it achieves 55a of continuous output current over a wide input supply range. integration of the driver and mosfets results in high efficiency due to optimal dead time control and parasitic inductance reduction. the MP86883 is a monolithic ic approach to drive up to 55a per phase. this very small tqfn-34 (6mm x 6mm) device can operate from 100khz to 1mhz. this device works with tri-state output controllers. it also comes with a general- purpose current sense and temperature sense. the MP86883 is ideal for server applications where efficiency and small size are a premium. features ? wide 4.5v to 14v operating input range ? simple logic interface ? 55a output current ? accepts tri-state pwm signal ? built-in switch for bootstrap ? current sense ? current limit protection ? temperature sense and protection ? fault reporting ? used for multi-phase operation ? available in tqfn-34 (6mm x 6mm) package applications ? server/workstation/desktop core voltage ? graphic card core regulators ? power modules a ll mps parts are lead-free and adhere to the rohs directive. for mps green status, please visit mps website under quality assurance. ?mps? and ?the future of analog ic technology? are registered trademarks of monolithi c power systems, inc. intelli-phase is trademark of monolithic power systems, inc. typical application 70 75 80 85 90 95 0 5 10 15 20 25 30 35 40 45 50 55
MP86883 ? intelli-phase solution in 6x6mm tqfn MP86883 rev. 1.0 www.monolithicpower.com 2 6/27/2014 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. ordering information part number* package top marking MP86883gqkt tqfn-34 (6mmx6mm) MP86883 * for tape & reel, add suffix ?z (e.g. MP86883gqkt?z); package reference pgnd pgnd pgnd pgnd pgnd pgnd pgnd pgnd pgnd pgnd vdrv pwm sync vdd agnd rin cs t1 fault# vtemp en bst absolute maximum ratings (1) supply voltage v in ....................................... 16v v sw (dc) ............................................. -1 v to 16v v sw (25ns) ............................................ -3v to 23v v bst .....................................................v sw + 6v all other pins ................................. -0.3v to +6v instantaneous current .............................. 100a continuous power dissipation (t a =+25c) (2) ............................................................ 4.3w junction temper ature .............................. 150c lead temperat ure ................................... 260c storage temperature ............... -65c to +150c recommended operating conditions (3) supply voltage v in .......................... 4.5v to 14v driver voltage v drv ........................ 4.5v to 5.5v logic voltage v dd .......................... 4.5v to 5.5v operating junction temp. (t j ). -40c to +125c thermal resistance (4) ja jc tqfn-34 (6mmx6mm)..??..? 29??8?..c/w notes: 1) exceeding these ratings may damage the device. 2) the maximum allowable power dissipation is a function of the maximum junction temperature t j (max), the junction-to- ambient thermal resistance ja , and the ambient temperature t a . the maximum allowable continuous power dissipation at any ambient temperature is calculated by p d (max) = (t j (max)-t a )/ ja . exceeding the maximum allowable powe r dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. internal thermal shutdown circuitry protects the device from permanen t damage. 3) the device is not guaranteed to function outside of its operating conditions. 4) measured on jesd51-7, 4-layer pcb.
MP86883 ? intelli-phase solution in 6x6mm tqfn MP86883 rev. 1.0 www.monolithicpower.com 3 6/27/2014 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. electrical characteristics (5) v in = 12v, v drv =v dd =5v, t a = -40c to 125c, unless otherwise noted. parameters symbol condition min typ max units i in shutdown i in ( off ) v drv = v dd = 0v 55 a i in standby i in (standby) v drv = v dd = 5v, pwm=en=low 60 a v in under voltage lockout threshold rising 4 4.4 v v in under voltage lockout threshold hysteresis 300 mv i drv quiescent current i drv ( quiescent ) pwm=low 500 a i drv shutdown current i drv shutdown 250 a i dd quiescent current i dd ( quiescent ) pwm=low 2.4 ma i dd shutdown current i dd shutdown 70 a vdd voltage uvlo rising 4 4.4 v vdd voltage uvlo hysteresis 300 mv high side current limit (5 ) i lim 80 a low side current limit (5 ) -30 a en input low voltage 0.4 v en input high voltage 2 v dead-time rising (5 ) 3 ns dead-time falling (5 ) 8 ns sync current i sync v sync =0v -65 a sync logic high voltage 2 v sync logic low voltage 0.4 v pwm high to sw rising delay (5) 35 ns pwm low to sw falling delay (5) 35 ns pwm tristate to sw hi-z delay (5) t lt 60 ns t tl 50 t ht 75 t th 50 minimum pwm pulse width (5) 30 ns current sense accuracy (5) i out =30a 4 % current sense gain 10 a/a temperature sense gain (6 ) 10 mv/c temperature sense offset (6) -100 mv over temperature flag (5) 170 c over temperature hysteresis (5) 30 c pwm input current i pwm v pwm =3.3v, v en =5v 95 a v pwm =0v, v en =5v -95 a pwm logic high voltage 2.65 v pwm tristate region (5) 1 1.7 v pwm logic low voltage 0.40 v notes: 5) guaranteed by design. 6) see ?junction temperature sense? section for details.
MP86883 ? intelli-phase solution in 6x6mm tqfn MP86883 rev. 0.8 www.monolithicpower.com 4 6/27/2014 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. preliminary specifications subject to change ? 2014 mps. all rights reserved.
MP86883 ? intelli-phase solution in 6x6mm tqfn MP86883 rev. 1.0 www.monolithicpower.com 5 6/27/2014 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. typical characteristics 3 3.2 3.4 3.6 3.8 4.0 4.2 4.4 4.6 4.8 5 -60 -20 20 60 100 140 -60 -20 20 60 100 140 1 1.1 1.2 1.3 1.4 1.5 -60 -20 20 60 100 140 -60 -20 20 60 100 140 -60 -20 20 60 100 140 -60 -20 20 60 100 140 0 0.5 1 1.5 2 2.5 3 -60 -20 20 60 100 140 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 0 10 20 30 40 50 60 70 80
MP86883 ? intelli-phase solution in 6x6mm tqfn MP86883 rev. 1.0 www.monolithicpower.com 6 6/27/2014 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. typical performance characteristics (continued) v in =12v, v out =1.2v, v drv = v dd =5v, l=215nh, f sw =600khz, t a =25c, no droop, unless otherwise noted. normalized power loss vs. output voltage normalized power loss vs. inductance normalized power loss vs. switching frequency efficiency (%) loss (w) normalized loss (w) normalized loss (w) i out (a) i out (a) f sw (khz) i out (a) i out (a) v out (v) 70 75 80 85 90 95 0 5 10 15 20 25 30 35 40 45 50 55 0 2 4 6 8 10 12 0 5 10 15 20 25 30 35 40 45 50 55 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 1.25 1.30 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 1.25 1.30 300 400 500 600 700 800 900 1000 0.90 0.92 0.94 0.96 0.98 1.00 1.02 1.04 1.06 1.08 1.10 1.12 1.14 1.16 1.18 1.20 100 150 200 250 300 350 400 450 500 10 15 20 25 30 35 40 45 50 55 60 0102030405060708090 10 15 20 25 30 35 40 45 50 55 60 0102030405060708090 safe operating area with heat sink no airflow 200 fpm 400 fpm no airflow 200 fpm 400 fpm
MP86883 ? intelli-phase solution in 6x6mm tqfn MP86883 rev. 1.0 www.monolithicpower.com 7 6/27/2014 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. pin functions pin # name description 1-6 sw switch output. 7 vdrv driver voltage. connect to 5v supply and decouple with 1f to 4.7f ceramic capacitor. 8-21 pgnd power ground. 22-23 in supply voltage. place c in close to the device to prevent large voltage spikes at the input. 24 en enable. pull low to place sw in a high impedance state. 25 vtemp single pin temperature sense output. 26 fault# fault reporting on hs current limit, over temperature and vdd uvlo. it is an open drain output during normal operation and pull-low when fault occurred. 27 t1 test pin. connect to ground. 28 cs current sense output. requires an external resistor. 29 rin current sense high side current compensation pin. connect through a resistor to in. 30 agnd analog ground. 31 vdd internal circuitry voltage. connect to vdrv thru 2.2 ? resistor and decouple with 1f capacitor to agnd. connect agnd and pgnd at this point. 32 pwm pulse width modulation. leave pwm floating or drive to mid-state to put sw in high impedance state. 33 sync synchronous low switch. leave open or pull high to enable. pull low to enter diode emulation mode. 34 bst bootstrap. requires a 0.22f to 1f capacitor to drive the power switch?s gate above the supply voltage. connects between sw and bst pins to form a floating supply across the power switch driver.
MP86883 ? intelli-phase solution in 6x6mm tqfn MP86883 rev. 1.0 www.monolithicpower.com 8 6/27/2014 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. block diagram control logic temperature sense sw pgnd fault# vtemp bst vdrv in sync pwm en rin vdrv vdd cs current sense t1 agnd level shift lsfet hsfet en tri-state enable hs current limit internal pwm en tri-state enable hs current limit internal pwm sync tri-state enable pwm hs current limit + - pgnd sw outputs 1 after inductor current zero crossing negative current limit + - sw outputs 1 if sw>1.5v 1.5v delay sw pgnd figure 1: functional block diagram
MP86883 ? intelli-phase solution in 6x6mm tqfn MP86883 rev. 1.0 www.monolithicpower.com 9 6/27/2014 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. operation the MP86883 is a 55a monolithic half-bridge driver with mosfets ideally suited for multi- phase buck regulators. when the en transitions from low to high and both v dd and v bst signals are sufficiently high, operation begins. it is recommended to use en pin to startup and shutdown the intelli-phase. to put sw node in a high impedance state, let pwm pin float or drive pwm pin to mid-state. drive the sync pin low to enter diode emulation mode. in diode emulation mode, the lsfet is off after inductor current crossed zero current. when hsfet over current is detected, the part will latch off. recycling vdd or toggling en will release the latch and restart the device. when the lsfet detects a -30a current, the part will turn off the lsfet for that cycle. when intelli-phase detects over temperature, it will turn off both hs and ls mosfet and latch off. toggle vdd or en to restart the device. current sense the cs pin is a bi-directional current source proportional to the inductor current. use the following equations to select the rin resistance to connect between rin pin and in pin: in l _ ripple r7.55i 170(k) =? + on in out out in out l_ripple in sw t(vv)v (vv) i lvfl ? ? == where i l_ripple is the peak to peak inductor ripple current. for example, if the ripple current is 10a, then the calculated r in is 94.5k ? and 95.3k ? (the closest 1% resistor value) should be selected for r in . the current sense gain is 10 a/a. in general, there is a resistor, r cs , connected from cs pin and v out or an external voltage which is capable to sink small current to provide enough voltage shift to meet the operating voltage on cs pin. the cs voltage range of 1v to 3.5v is required to keep cs?s output current linearly proportional to inductor current. use the following equations to determine a proper reference voltage and/or r cs value: cs cs ref 1v i r v 3 . 5 v < + < 6 cs l ii1010 ? = intelli-phase?s current sense output can be used by controller to accurately monitor the output current. the cycle-by-cycle current information from cs pin can be used for phase current balancing, over current protection and active voltage positioning (output voltage droop). intelli-phase?s accurate current sense can replace traditional inductor dcr current sensing scheme. in traditional inductor dcr current sense: cs l dcr vir = with intelli-phase?s cs output, v cs becomes: 6 cs cs cs l cs virir1010 ? = = where the r dcr term is replaced with 6 cs r1010 ? . figure 2 shows a circuit replacing inductor dcr sensing with intelli- phase?s cs output. there are several advantages with this current sensing method: 1. since current sensing is done by intelli- phase, user can select low dcr inductors and still have large current sense signal by selecting larger r cs . 2. tight dcr variation is not required. 3. cs signal is independent of impedance matching and inductor temperature.
MP86883 ? intelli-phase solution in 6x6mm tqfn MP86883 rev. 1.0 www.monolithicpower.com 10 6/27/2014 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. figure 2: replacing dcr current sense with intelli-phase?s cs output junction temperature sense the vtemp pin is a voltage output proportional to the junction temperature. the junction temperature can be calculated from the following equation: () temp junction o v 100mv t 10mv c + = , for t junction >10 o c for example, if the vtemp voltage is 700mv, then the junction temperature of intelli-phase is 80 o c. vtemp can not go below 0v, so it will read 0v for junction temperature lower than 10 o c. be sure to measure this voltage between vtemp and agnd pins for the most accurate reading. in multi-phase operation, the vtemp pins of every intelli-phase can be connected to the temperature monitor pin of the controller. a sample circuitry is shown in figure 3. vtemp signals can also be used for system thermal protection as shown in figure 4.
MP86883 ? intelli-phase solution in 6x6mm tqfn MP86883 rev. 1.0 www.monolithicpower.com 11 6/27/2014 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. l1 pwm intelliphase pwm1 l2 pwm vin vin pwm2 vtemp vin vin vtemp intelliphase intelli-phase power stage v out c out multi-phase controller temperature adc figure 3: multi-phase temperature sense utilization r 2 vtemp1 vtemp2 r 1 program r1 and r2 to set the protection temperature for system protection npn figure 4: system thermal protection
MP86883 ? intelli-phase solution in 6x6mm tqfn MP86883 rev. 1.0 www.monolithicpower.com 12 6/27/2014 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. pcb layout guide line pcb layout plays an important role to achieve stable operation. for optimal performance, follow these guidelines. 1. always place some input bypass ceramic capacitors next to the device and on the same layer as the device. do not put all of the input bypass capacitors on the back side of the device. use as many via and input voltage planes as possible to reduce switching spikes. place the bst capacitor and the vdrv capacitor as close to the device as possible. 2. place the vdd decoupling capacitor close to the device. connect agnd and pgnd at the point of vdd capacitor's ground connection. 3. it is recommended to use 0.22f to 1f bootstrap capacitor and 3.3 ? bootstrap resistance. do not use capacitance values below 100nf for the bst capacitor. 4. connect in, sw and pgnd to large copper areas and use via to cool the chip to improve thermal performance and long-term reliability. 5. keep the path of switching current short and minimize the loop area formed by the input capacitor. keep the connection between the sw pin and the input power ground as short and wide as possible. pgnd vin sw c in c vdrv c bst
MP86883 ? intelli-phase solution in 6x6mm tqfn MP86883 rev. 1.0 www.monolithicpower.com 13 6/27/2014 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. typical application circuits figure 5: 4-phase intelli-phase with mp2935 vr12.5 controller
MP86883 ? intelli-phase solution in 6x6mm tqfn notice: the information in this document is subject to change without notice. please contact mps for current specifications. users should warrant and guarantee that third party intellectual property rights are not infringed upon when integrating mps products into any application. mps will not assume any legal responsibility for any said applications. MP86883 rev. 1.0 www.monolithicpower.com 14 6/27/2014 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2014 mps. all rights reserved. package information tqfn-34 (6mm x 6mm) side view bottom view note: 1) all dimensions are in millimeters. 2) exposed paddle size does not include mold flash. 3) lead coplanarity shall be 0.10 millimeters max. 4) jedec reference is mo-220. 5) drawing is not to scale. pin 1 id marking top view pin 1 id index area recommended land pattern pin 1 id

▲Up To Search▲

Price & Availability of MP86883

	To Download MP86883 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .