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july 2006 rev 8 1/16 16 std38nh02l STD38NH02L-1 n-channel 24v - 0.011 ? - 38a - dpak/ipak stripfet? iii power mosfet general features logic level device r ds(on) * q g industry?s benchmark conduction losses reduced switching losses reduced low threshold drive description this device utilizes the latest advanced design rules of st?s proprietary stripfet? technology. this is suitable fot the most demanding dc-dc converter application where high efficiency is to be achieved. applications switching application internal schematic diagram type v dss r ds(on) i d STD38NH02L-1 24v <0.0135 ? 38a std38nh02l 24v <0.0135 ? 38a dpak 3 2 1 1 3 ipak www.st.com order codes part number marking package packaging STD38NH02L-1 d38nh02l ipak tube std38nh02lt4 d38nh02l dpak tape & reel
contents std38nh02l - STD38NH02L-1 2/16 contents 1 electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1 electrical characteristics (curves) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4 appendix a . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 6 packing mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 7 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
std38nh02l - std38nh0 2l-1 electrical ratings 3/16 1 electrical ratings table 1. absolute maximum ratings symbol parameter value unit v spike (1) 1. garanted when external r g =4.7 ? and t f < t fmax . drain-source voltage rating 30 v v ds drain-source voltage (v gs = 0) 24 v v dgr drain-gate voltage (r gs = 20 k ? )24v v gs gate- source voltage 20 v i d drain current (continuous) at t c = 25c 38 a i d drain current (continuous) at t c = 100c 27 a i dm (2) 2. pulse width limited by safe operating area. drain current (pulsed) 152 a p tot total dissipation at t c = 25c 40 w derating factor 0.27 w/c e as (3) 3. starting t j = 25 c, i d = 19a, v dd = 18v single pulse avalanche energy 250 mj t stg storage temperature -55 to 175 c t j max. operating junction temperature table 2. thermal data rthj-case thermal resistance junction-case max 3.75 c/w rthj-amb thermal resistance ju nction-ambient max 100 c/w t j maximum lead temperature for soldering purpose 275 c
electrical characteristics std38nh02l - STD38NH02L-1 4/16 2 electrical characteristics (t case =25c unless otherwise specified) table 3. on/off states symbol parameter test conditions min. typ. max. unit v (br)dss drain-source breakdown voltage i d = 25ma, v gs =0 24 v i dss zero gate voltage drain current (v gs = 0) v ds = 20v v ds = 20v, t c = 125c 1 10 a a i gss gate-body leakage current (v ds = 0) v gs = 20v 100 na v gs(th) gate threshold voltage v ds = v gs , i d = 250a 1 1.8 2.5 v r ds(on) static drain-source on resistance v gs = 10v, i d = 19a v gs = 5v, i d = 9.5a 0.011 0.015 0.0135 0.025 ? ? table 4. dynamic symbol parameter test conditions min. typ. max. unit g fs (1) 1. pulsed: pulse duration = 300 s, duty cycle 1.5 %. forward transconductance v ds = 10v , i d =19a 19 s c iss c oss c rss input capacitance output capacitance reverse transfer capacitance v ds = 25v, f = 1mhz, v gs = 0 1070 305 45 pf pf pf r g gate input resistance f = 1 mhz gate dc bias = 0 test signal level = 20 mv open drain 1 ? t d(on) t r t d(off) t f turn-on delay time rise time turn-off delay time fall time v dd = 10v, i d = 19a r g =4.7 ? v gs = 10v (see figure 13 ) 7 62 25 12 ns ns ns ns q g q gs q gd total gate charge gate-source charge gate-drain charge 0.44v v dd 10v, i d = 38a, v gs = 10v, r g =4.7 ? (see figure 14 ) 18 4 2.5 24 nc nc nc q oss (2) 2. qoss = coss* ? vin , coss = cgd + cds . see chapter 4: appendix a output charge v ds = 16 v, v gs = 0 v 6.5 nc
std38nh02l - STD38NH02L-1 electrical characteristics 5/16 table 5. source drain diode symbol parameter test conditions min. typ. max. unit i sd i sdm (1) 1. pulse width limited by safe operating area. source-drain current source-drain current (pulsed) 38 152 a a v sd (2) 2. pulsed: pulse duration = 300 s, duty cycle 1.5 % forward on voltage i sd = 19a, v gs = 0 1.3 v t rr q rr i rrm reverse recovery time reverse recovery charge reverse recovery current i sd = 38a, di/dt = 100a/s, v dd = 18v, t j = 150c (see figure 15 ) 27 22 1.6 ns nc a
electrical characteristics std38nh02l - STD38NH02L-1 6/16 2.1 electrical characteri stics (curves) figure 1. safe operating area figure 2. thermal impedance figure 3. output characterisics figure 4. transfer characteristics figure 5. transconductance figure 6. static drain-source on resistance
std38nh02l - STD38NH02L-1 electrical characteristics 7/16 figure 7. gate charge vs gate-source voltage figure 8. capacitance variations figure 9. normalized gate threshold voltage vs temperature figure 10. normalized on resistance vs temperature figure 11. source-drain diode forward characteristics figure 12. normalized breakdown voltage vs temperature
test circuit std38nh02l - STD38NH02L-1 8/16 3 test circuit figure 13. switching times test circuit for resistive load figure 14. gate charge test circuit figure 15. test circuit for inductive load switching and diode recovery times figure 16. unclamped inductive load test circuit figure 17. unclamped inductive wavefo rm figure 18. switching time waveform
std38nh02l - STD38NH02L-1 appendix a 9/16 4 appendix a the power losses associated with the fets in a synchronous buck converter can be estimated using the equations shown in the table below. the formulas give a good approximation, for the sake of performance comparison, of how different pairs of devices affect the converter efficiency. however a very important parameter, the working temperature, is not considered. the real device behavior is really dependent on how the heat generated inside the devices is removed to allow for a safer working junction temperature. the low side (sw2) device requires: very low r ds(on) to reduce conduction losses small qgls to reduce the gate charge losses small coss to reduce losses due to output capacitance small qrr to reduce losses on sw1 during its turn-on the cgd/cgs ratio lower than vth/vgg ratio especially with low drain to source voltage to avoid the cross conduction phenomenon; the high side (sw1) device requires: small rg and ls to allow higher gate current peak and to limit the voltage feedback on the gate small qg to have a faster commutation and to reduce gate charge losses low r ds(on) to reduce the conduction losses. figure 19. buck converter: power losses estimation
appendix a std38nh02l - STD38NH02L-1 10/16 table 6. power losses calculation high side switching (sw1) low side switch (sw2) pconduction pswitching zero voltage switching pdiode recovery (1) 1. dissipated by sw1 during turn-on not applicable conductio n not applicable pgate(q g ) p qoss table 7. paramiters meaning parameter meaning d duty-cycle q gsth post threshold gate charge q gls third quadrant gate charge pconduction on state losses pswitching on-off transition losses pdiode conduction and reverse recovery diode losses pgate gate drive losses p qoss output capacitance losses * i * r 2 l ds(on)sw1 ) 1 ( * i * r 2 l ds(on)sw2 ? g l i i * f * ) q (q * v gd(sw1) gsth(sw1) in + f * q * v rr(sw2) in f * t * i * v deadtime l f(sw2) f * v * q gg g(sw1) f * v * q gg gls(sw2) 2 f * q * v oss(sw1) in 2 f * q * v oss(sw2) in
std38nh02l - STD38NH02L-1 package mechanical data 11/16 5 package mechanical data in order to meet environmental requirements, st offers these devices in ecopack? packages. these packages have a lead-free second level interconnect . the category of second level interconnect is marked on the package and on the inner box label, in compliance with jedec standard jesd97. the maximum ratings related to soldering conditions are also marked on the inner box label. ecopack is an st trademark. ecopack specifications are available at: www.st.com
package mechanical data std38nh02l - STD38NH02L-1 12/16 dim. mm inch min. typ. max. min. typ. max. a 2.2 2.4 0.086 0.094 a1 0.9 1.1 0.035 0.043 a3 0.7 1.3 0.027 0.051 b 0.64 0.9 0.025 0.031 b2 5.2 5.4 0.204 0.212 b3 0.85 0.033 b5 0.3 0.012 b6 0.95 0.037 c 0.45 0.6 0.017 0.023 c2 0.48 0.6 0.019 0.023 d 6 6.2 0.236 0.244 e 6.4 6.6 0.252 0.260 g 4.4 4.6 0.173 0.181 h 15.9 16.3 0.626 0.641 l 9 9.4 0.354 0.370 l1 0.8 1.2 0.031 0.047 l2 0.8 1 0.031 0.039 a c2 c a3 h a1 d l l2 l1 1 3 = = b3 b b6 b2 e g = = = = b5 2 to-251 (ipak) mechanical data 0068771-e
std38nh02l - STD38NH02L-1 package mechanical data 13/16 dim. mm. inch min. typ max. min. typ. max. a 2.2 2.4 0.086 0.094 a1 0.9 1.1 0.035 0.043 a2 0.03 0.23 0.001 0.009 b 0.64 0.9 0.025 0.035 b4 5.2 5.4 0.204 0.212 c 0.45 0.6 0.017 0.023 c2 0.48 0.6 0.019 0.023 d 6 6.2 0.236 0.244 d1 5.1 0.200 e 6.4 6.6 0.252 0.260 e1 4.7 0.185 e 2.28 0.090 e1 4.4 4.6 0.173 0.181 h 9.35 10.1 0.368 0.397 l 1 0.039 (l1) 2.8 0.110 l2 0.8 0.031 l4 0.6 1 0.023 0.039 r 0.2 0.008 v2 0 8 0 8 dpak mechanical data 0068772-f
packing mechanical data std38nh02l - STD38NH02L-1 14/16 6 packing mechanical data tape and reel shipment dpak footprint dim. mm inch min. max. min. max. a 330 12.992 b 1.5 0.059 c 12.8 13.2 0.504 0.520 d 20.2 0.795 g 16.4 18.4 0.645 0.724 n 50 1.968 t 22.4 0.881 base qty bulk qty 2500 2500 reel mechanical data dim. mm inch min. max. min. max. a0 6.8 7 0.267 0.275 b0 10.4 10.6 0.409 0.417 b1 12.1 0.476 d 1.5 1.6 0.059 0.063 d1 1.5 0.059 e 1.65 1.85 0.065 0.073 f 7.4 7.6 0.291 0.299 k0 2.55 2.75 0.100 0.108 p0 3.9 4.1 0.153 0.161 p1 7.9 8.1 0.311 0.319 p2 1.9 2.1 0.075 0.082 r 40 1.574 w 15.7 16.3 0.618 0.641 tape mechanical data all dimensions are in millimeters
std38nh02l - STD38NH02L-1 revision history 15/16 7 revision history table 8. revision history date revision changes 21-jun-2004 7 preliminary version 11-jul-2006 8 new template, no content change
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