The STP60NH2LL utilizes the latest advanced
design rules of ST’s proprietary STripFET™
technology. This is suitable for the most
demanding DC-DC converter application where
high efficiency is to be achieved.
Figure 5.TransconductanceFigure 6.Static drain-source on resistance
6/14
Page 7
STP60NH2LLElectrical characteristics
Figure 7.Gate charge vs. gate-source voltage Figure 8.Capacitance variations
Figure 9.Normalized gate threshold voltage
vs. temperature
Figure 11. Source-drain diode forward
characteristics
Figure 10. Normalized on resistance vs.
temperature
Figure 12. Normalized Breakdown Voltage vs.
Tem perature
7/14
Page 8
Test circuitSTP60NH2LL
3 Test circuit
Figure 13. Switching times test circuit for
resistive load
Figure 15. Test circuit for inductive load
switching and diode recovery times
Figure 14. Gate charge test circuit
Figure 16. Unclamped Inductive load test
circuit
Figure 17. Unclamped inductive waveformFigure 18. Switching time waveform
8/14
Page 9
STP60NH2LLAppendix A
4 Appendix A
Figure 19. Buck converter: power losses estimation
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
●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 conduction losses
DS(on)
to reduce the conduction losses.
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Page 10
Appendix ASTP60NH2LL
V
Table 6.Power losses calculation
High side switching (SW1)Low side switch (SW2)
Pconduction
PswitchingZero Voltage Switching
Pdiode
Pgate(Q
Conductio
P
Qoss
Recovery
(1)
n
)
G
Not applicable
Not applicable
2
δ
*I *R
LDS(on)SW1
I
+
gd(SW1)gsth(SW1)in
f*V*Q
ggg(SW1)
oss(SW1)in
f*Q*V
L
*f*)Q(Q*
I
g
2
1. Dissipated by SW1 during turn-on
Table 7.Parameters meaning
2
LDS(on)SW2
rr(SW2)in
deadtimeLf(SW2)
gggls(SW2)
oss(SW2)in
)1(*I *R
δ
−
f*Q*V
f*t*I*V
f*V*Q
f*Q*V
2
ParameterMeaning
dDuty-cycle
Q
gsth
Q
gls
PconductionOn state losses
PswitchingOn-off transition losses
PdiodeConduction and reverse recovery diode losses
PgateGate drive losses
P
Qoss
10/14
Post threshold gate charge
Third quadrant gate charge
Output capacitance losses
Page 11
STP60NH2LLPackage mechanical data
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
11/14
Page 12
Package mechanical dataSTP60NH2LL
TO-220 MECHANICAL DATA
DIM.
A4.404.600.1730.181
b0.610.880.0240.034
b11 .151.700.0450.066
c0.490.700.0190.027
D15.2515.750.600.620
E1010.400.3930.409
e2.402.700.0940.106
e14 .955.150.1940.202
F1.231.320.0480.052
H16.206.600.2440.256
J12.402.720.0940.107
L13140.5110.551
L13 .503.930.1370.154
L2016.400.645
L3028.901.137
øP3.753.850.1470.151
Q2.652.950.1040.116
MIN.TYPMAX.MIN.TYP.MAX.
mm.inch
12/14
Page 13
STP60NH2LLRevision history
6 Revision history
Table 8.Revision history
DateRevisionChanges
31-May-20051First release.
06-Sep-20062The document has been reformatted.
31-Jan-20073Typo mistake on Tab le 1 .
13/14
Page 14
STP60NH2LL
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