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.
VOUT
PHASE
iL
VOUT
PHASE
iL
50mV/div 10V/div 5A/div
20µs/div
Figure 17: Load Transient 0‐8A
FCCM
PHASE
VOUT
iL
50mV/div 10V/div 5A/div
20µs/div
Figure 18: Load Transient 4‐12A
FCCM
PHASE
VOUT
iL
5V/div 10V/div 500mV/div 5A/div
10µs/div
Figure 19: DCM/FCCM Transition
2V/div 10V/div 500mV/div 5A/div
5µs/div
Figure 20: FCCM/DCM Transition
Figure 21: Thermal Image at VIN = 12V, IOUT = 15A
(IR3477: 98oC, Inductor: 69oC, PCB: 49oC)
11 March 27, 2013 | V2.5 | PD97604
Figure 22: Thermal Image at VIN = 19V, IOUT = 15A
(IR3477: 111oC, Inductor: 75oC, PCB: 55oC)
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