Preliminary Datasheet
4/6 CHANNEL CHARGE PUMP CURRENT SINK FOR LED DRIVER
AP3606/AP3607
Digital Dimming Operating Diagram
Figure 32. Digital Dimming Operating Diagram of AP3606/AP3607
Note 3: The dimming control can be achieved by applying a pulse to the EN pin. When the low level duration
time of pulse is between TLOmin and TLOmax, and the high level duration time is larger than THImin, the LED current
will decrease 1/16. If the low level duration time is larger than TSHDNmax, the IC will be turned off. When
AP3606/AP3607 is powered on, the WLED is in full brightness. And it will keep maximum current until the
pulse is detected. After 15 pulses the WLED current decreases to 1/16 of full brightness. It will increase to full
brightness if a pulse is added to EN pin then.
Dec. 2008 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
14