Datasheet

70
75
80
85
90
95
100
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
Efficiency (%)
Output Current (A)
10 VIN
24 VIN
38 VIN
C001
V
OUT
= 40 V
f
sw
= 300 kHz
TPS43060
TPS43061
SLVSBP4C –DECEMBER 2012–REVISED SEPTEMBER 2013 www.ti.com
Figure 35. The Efficiency of High Voltage Boost Converter Using TPS43060
The design procedure of TPS43061 is also applicable to the TPS43060; however, several difference should be
noted. Unlike the TPS43061, which has 5.5 V gate drive supply and is optimized for low Qg NexFETs™, the
TPS43060 has a 7.5 V gate drive supply and is suitable to drive standard threshold MOSFETs. The TPS43060
requires an external bootstrap diode (D1 as shown in Figure 34) from VCC to BOOT to charge the bootstrap
capacitor, and the external diode should have a breakdown voltage rating greater than the output voltage. In
addition, the TPS43060 also requires a 2Ω resistor (R19 shown in Figure 34) connected in series with the VCC
pin to limit the peak current drawn through the internal circuitry when the external bootstrap diode is conducting.
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