5
AN1482.0
June 30, 2009
FIGURE 9. PWM2 OUTPUT RIPPLE UNDER MAX LOAD
(V
IN
= 12V, I
O1
= I
O2
= 6A, I
O3
= 4A, FULL
BANDWIDTH)
FIGURE 10. PWM3 OUTPUT RIPPLE UNDER MAX LOAD
(V
IN
= 12V, I
O1
= I
O2
= 6A, I
O3
= 4A, FULL
BANDWIDTH)
FIGURE 11. PWM1 LOAD TRANSIENT RESPONSE
(LOAD STEP FROM 1.5A TO 4.5A)
FIGURE 12. PWM2 LOAD TRANSIENT RESPONSE
(LOAD STEP FROM 1.5A TO 4.5A)
FIGURE 13. PWM3 LOAD TRANSIENT RESPONSE
(LOAD STEP FROM 1A TO 3A)
FIGURE 14. SOFT START WAVEFORMS
Typical Evaluation Board Performance Curves
V
IN
= 12V, Unless Otherwise Noted.
(Continued)
V
OUT2
(AC), 50mV/DIV
500ns/DIV
V
OUT3
(AC), 50mV/DIV
500ns/DIV
V
OUT1
(AC), 50mV/DIV
I
STEP
, 2A/DIV
50µs/DIV
V
OUT2
(AC, 100mV/DIV)
I
STEP
, 2A/DIV
50µs/DIV
V
OUT3
(AC), 100mV/DIV
I
STEP
, 1A/DIV
50µs/DIV
V
OUT1
, 1V/DIV
V
OUT2
, 2V/DIV
V
OUT4
, 2V/DIV
V
OUT3
, 2V/DIV
1ms/DIV
Application Note 1482
