ISL6443IRZ-TK 参数 Datasheet PDF下载

ISL6443

Typical Performance Curves

(Continued)

(Oscilloscope Plots are Taken Using the ISL6443EVAL Evaluation Board, VIN = 12V Unless Otherwise Noted.)

V

OUT1

200mV/DIV

AC COUPLED

V

OUT2

200mV/DIV

AC COUPLED

I

OUT1

1A/DIV

I

OUT2

1A/DIV

FIGURE 7. LOAD TRANSIENT RESPONSE VOUT1 (3.3V)

FIGURE 8. LOAD TRANSIENT RESPONSE VOUT2 (3.3V)

VCC_5V 1V/DIV

V

OUT1

2V/DIV

I

L1

2A/DIV

SS1 2V/DIV

V

OUT1

1V/DIV

FIGURE 9. PWM SOFT-START WAVEFORM

FIGURE 10. OVERCURRENT HICCUP MODE OPERATION

100

100

PWM1 EFFICIENCY (%)

PWM2 EFFICIENCY (%)

90

90

80

80

70

70

60

0

1

2

LOAD CURRENT (A)

3

4

60

0

1

2

LOAD CURRENT (A)

3

4

FIGURE 11. PWM1 EFFICIENCY vs LOAD (3.3V), VIN = 12V

FIGURE 12. PWM2 EFFICIENCY vs LOAD (3.3V), VIN = 12V

9

FN9044.1

October 4, 2005