Triple-Output Power-Supply
Controller for Notebook Computers
_____________________________Typical Operating Characteristics (continued)
(Circuit of Figure 1, Transpower transformer type TTI5870, TA = +25°C, unless otherwise noted.)
PULSE-WIDTH MODULATION MODE WAVEFORMS
IDLE-MODE WAVEFORMS
LX VOLTAGE
10V/div
LX VOLTAGE
10V/div
+5V OUTPUT
VOLTAGE
50mV/div
HORIZONTAL = 500ns/div
+5V OUTPUT CURRENT = 1A
INPUT VOLTAGE = 16V
+5V LOAD-TRANSIENT RESPONSE
3A
LOAD CURRENT
0A
+5V OUTPUT
VOLTAGE
50mV/div
HORIZONTAL = 5µs/div
+5V OUTPUT CURRENT = 42mA
INPUT VOLTAGE = 16V
+3.3V LOAD-TRANSIENT RESPONSE
3A
LOAD CURRENT
0A
HORIZONTAL = 200µs/div
VIN = 15V
+5V OUTPUT
50mV/div
HORIZONTAL = 200µs/div
VIN = 15V
+3.3V OUTPUT
50mV/div
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