NX2141 Datasheet, PDF (10/21 Pages) Microsemi Corporation – SINGLE CHANNEL MOBILE PWM CONTROLLER WITH FEEDFORWARD AND ENABLE

Demoboard waveforms(cont'd)
NX2141
Figure 11 - Step VIN response(CH1 Vout AC(50mV/
div), CH3 VIN(5V/div), CH4 SW(5V/div))
Figure 12 - Enlarged Figure 11 (CH1 Vout AC(50mV/
div), CH3 VIN(5V/div), CH4 SW(5V/div))
Figure 13 - Step into precharged output (CH1 EN (2V/
div), CH3 OUTPUT CURRENT(10A/div), CH4
VOUT(500mV/div))
89.00%
88.00%
87.00%
86.00%
85.00%
84.00%
83.00%
82.00%
81.00%
80.00%
79.00%
0
efficinecy vs Iout(VIn=12V)
2
4
6
8
Iout(A)
10
12
Figure 15 - Efficiency(VIN=12V, VOUT=1V)
Figure 14 - Soft start(CH1 EN(2V/div),CH2 output
current(10A/div), CH3 VOUT(500mV/div))
86.00%
84.00%
82.00%
80.00%
78.00%
76.00%
74.00%
0
efficinecy vs Iout(VIn=19V)
2
4
6
8
Iout(A)
10
12
Figure 16 - Efficiency(VIN=19V, VOUT=1V)
Rev. 1.6
10
05/15/07