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| AMC7150 Datasheet, PDF (10/12 Pages) ADDtek Corp – 1.5A Power LED Driver | |||
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AMC7150
5. PWM Dimming Function of AMC7150
5.1 Application Circuitï¼
L
4V~40V
Rsense
Enable
1N4148
VCC
CS
OUT
OSC AMC7150
DF
CIN
CT
GND
Power
LED
5.2 Description of Enable Controlï¼
One diode (1N4148) is added between the inward PWM control signal and the OSC pin.
Parameter
Description
Symbol Min Max Unit Apply Pin
Enable voltage âHighâ
Enable voltage âLowâ
Enable voltage sink current
Turn OFF the driver
Turn ON the driver
Turn OFF the driver
VEN,H
VEN,L
IEN
2 5.5 V
0.4 V
300 uA
Enable
5.3 Measured Waveformï¼
When ON duty=100%, iLED,Mean =369mA
ON duty = 9.3%, iLED,Mean =30.2mA
ON duty = 91.7%, iLED,Mean =342mA
Ch1: iLED, Ch3: Enable
Copyright © 2006, ADDtek Corp.
http://www.addmtek.com
Ch1: iLED, Ch3: Enable
5-1
DA011 ï¼ September 1, 2006
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