external dimensions (unit: mm) features internal current sense resistor high accuracy current monitor output (sample & hold function) built-in overcurrent and thermal protection circuits 48 high-side power switch ics [surface-mount, current monitor output function] SPF5018 12.2 0.2 1.0 2.5 0.2 7.5 0.2 10.5 0.2 1.27 0.25 16 18 9 +0.1 0.05 0.4 +0.15 0.05 0.25 +0.15 0.05 2.0 +0.2 0.8 fin thickness 2 3 4 6 5 7 15 13 14 11 vcc cmos logic s/h osc tsd ocp lamp sense mos out v b lg c pwm hold s/h clamp d s block diagram (for one channel) standard connection diagram timing chart v cc v b 2 sfp5018 pwm hold s/h c c 1 d 2 d 1 lg out sense + sense 11 14 13 15 5.1 0.01 5 7 6 4 3 * use a schottky di for d2 when the sense + terminal is lower than the abs. max. rated voltage (?.8v) parameter symbol unit conditions ratings absolute maximum ratings (ta=25?) power supply voltage 1 power supply voltage 2 power supply voltage 3 output terminal voltage input terminal voltage output current power dissipation storage temperature channel temperature v b v cc v b vsense + vsense v out v pwm v hold i out p d tstg tch v v v v v v a w c c v b terminal, t = 1 min depends on surface-mount board pattern 0 to 32 ?.5 to 7.0 0 to 40 ?.8 to 6 vsense + io ? rsense ? to 32 ?.5 to 7.0 2.0 2.0 ?0 to +150 150 current sensing voltage electrical characteristics parameter symbol min typ max unit conditions ratings min. operating power supply voltage operating power supply voltage 1 operating power supply voltage 2 quiescent circuit current 1 quiescent circuit current 2 pwm terminal input voltage pwm terminal input current hold terminal input voltage hold terminal input current output on resistance current sensing resistance overcurrent protection starting current thermal shutdown operating temperature operation circuit for current monitor output current monitor output voltage current monitor output current output transfer time output rise time output fall time current monitor output hold time current monitor output delay time hold time after inputting hold s/h settling time v b min v b v cc iqvb iqvcc v pwm h v pwm l i pwm h v hold h v hold l i hold h r dson rsense is ttsd i o v sh i sh t on t off t r t f t sh t shd t shh t stt minimum operation of out terminal. vcc = 5v, v pwm = 0 v vcc = 5v, v pwm = 0 v vcc = 5v vcc = 5v, v pwm = 5v, active h vcc = 5v vcc = 5v, v pwm = 5v, active h i out = 1 a i out = 1a, ta = 125 c i out = 1 a i out = 1a, ta = 125 c io = 0a, vcc = 5v io = 0.2a, vcc = 5v io = 0.5a, vcc = 5v, ta = 40 to 140 c io = 1.2a, vcc = 5v, ta = 40 to 140 c io = 1a, vcc = 5v, v sh = 0 v io = 1a, vcc = 5v, v sh = 5 v io = 0.5a, vcc = 5v v v v ma ma v a v a ? ? ? ? a c a v v v v ma ma s s s s s s s s s 6 10 3.5 3.5 3.0 150 0.2 0.488 1.219 2.925 ? 500 14 5.0 70 70 0.500 1.250 3.000 16 7.2 0.2 1.5 110 1.5 110 0.14 0.21 0.21 0.25 1.2 0.2 0.512 1.281 3.075 5 15 15 100 50 650 1 2 70 80 v b = 11v, vcc = 5v, io = 1.2a, c1 = 0.033 f v b = 11v, vcc = 5v, io = 1.2a, c1 = 0.033 f, ta = 125 c * 1 * 2 * 4 * 3 * 3 io = 0.5a, vcc = 5v, c1 = 0.033 f (v b = 14v, ta=25? unless otherwise specified) note: * 1: accuracy warranty range for current monitor output * 2: equivalent errors are not included in current monitor output accuracy. * 3: with built-in pull-down resistance (70k ? typ) * 4: self-excitation and oscillation type * 5: accuracy of current monitor output is affected by the materials of the hold capacitor (c1). the capacitor c1 must be of low dielectric absorption and have good bias and leak current characteristics. * 1 ordinary operation (auto hold) ordinary operation (auto hold) ordinary operation (external hold) thermal protection overcurrent protection v pwm v out icoil vs/h vhold * 1 * 1 * 2 500 to 650 500 to 650 usec usec t ruth table v pwm lh v out lh 1k ? controlling microcomputer cpu f k ? 70k ? 70k ? charge pump sense r + sense + sense
|
