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AMC7169 Datasheet(PDF) 3 Page - ADDtek Corp |
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AMC7169 Datasheet(HTML) 3 Page - ADDtek Corp |
3 / 5 page ![]() AMC7169 Copyright © 2006 ADDtek Corp. 3 DD073_A -- JUNE 2006 APPLICATION INFORMATION Monitoring Mode: The forward voltage drop (Vf) of all LEDs should be less than 4V, which is lower than AMC7169 trigger voltage 5.0V. All AMC7169 at monitoring mode would only sink ~uA current from the system. ILED 7169 7169 7169 7169 7169 7169 7169 7169 Constant Current LED Driver + - - + Triggered Mode: Any LED may become open circuit because of LED damage or wiring problem. When it happens, the voltage drop across adjacent AMC7169 starts to increase, and then AMC7169 will be trigged when the voltage drop reaches 5V. The dropout voltage on AMC7169 will be around 1V and the LED current ILED will be bypassed to next LED. All LEDs will work well except the abnormal LED bypassed. 7169 7169 7169 7169 7169 7169 7169 7169 Constant Current LED Driver + - - + ILED Reverse Mode: When the LED string was reversed connected to the driver, the AMC7169 build-in reverse protection diode was turned-on to bypass the current. Such that the reverse voltage on LEDs was reduced to prevent LED damage. Constant Current LED Driver + - 7169 7169 7169 7169 7169 7169 7169 7169 ILED + - |
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