IR3871MPBF Просмотр технического описания (PDF) - International Rectifier
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IR3871MPBF
International Rectifier
IR3871MPBF Datasheet PDF : 21 Pages
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IR3871MPBF
TYPICAL OPERATING DATA
Tested with demoboard shown in Figure 7, VIN = 12V, VCC = 5V, Vout = 1.05V, Fs = 300kHz, TA = 25oC, no airflow,
unless otherwise specified
EN
PGOOD
EN
PGOOD
SS
VOUT
SS
VOUT
5V/div 5V/div 1V/div 500mV/div
5ms/div
Figure 8: Startup
VOUT
PHASE
5V/div 5V/div 1V/div 500mV/div
200µs/div
Figure 9: Shutdown
VOUT
PHASE
iL
iL
20mV/div 5V/div 2A/div
10µs/div
Figure 10: DCM (IOUT = 0.1A)
PGOOD
SS
VOUT
IOUT
20mV/div 5V/div 5A/div
2µs/div
Figure 11: CCM (IOUT = 6A)
PGOOD
FB
VOUT
iL
5V/div 1V/div 1V/div 10A/div
1ms/div
Figure 12: Over Current Protection
(tested by shorting VOUT to PGND)
5V/div 1V/div 500mV/div 2A/div
50µs/div
Figure 13: Over Voltage Protection
(tested by shorting FB to VOUT)
9
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