IR3477 Просмотр технического описания (PDF) - International Rectifier
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IR3477 Datasheet PDF : 21 Pages
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15A Highly Integrated SupIRBuckTM
IR3477
TYPICAL OPERATING DATA
Tested with demoboard shown in Figure 4, VIN = 12V, VCC = 5V, VOUT = 1.05V, Fs = 300kHz, TA = 25oC, no airflow, unless
otherwise specified.
EN
PGOOD
SS
VOUT
EN
PGOOD
SS
VOUT
5V/div 5V/div 1V/div 500mV/div
Figure 11: Startup
5ms/div
VOUT
5V/div 5V/div 1V/div 500mV/div
500µs/div
Figure 12: Shutdown
VOUT
PHASE
iL
PHASE
iL
20mV/div 5V/div 5A/div
10µs/div
Figure 13: DCM (IOUT = 0.1A)
PGOOD
SS
VOUT
iL
20mV/div 5V/div 10A/div
2µs/div
Figure 14: CCM (IOUT = 12A)
PGOOD
FB
VOUT
iL
5V/div 1V/div 1V/div 10A/div
2ms/div
Figure 15: Over Current Protection
(tested by shorting VOUT to PGND)
10 March 27, 2013 | V2.5 | PD97604
5V/div 1V/div 500mV/div 2A/div
50µs/div
Figure 16: Over Voltage Protection
(tested by shorting FB to VOUT)
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