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AP3612 Datasheet(PDF) 3 Page - BCD Semiconductor Manufacturing Limited |
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AP3612 Datasheet(HTML) 3 Page - BCD Semiconductor Manufacturing Limited |
3 / 18 page Preliminary Datasheet Boost Type LED Driver with 12-Channel Current Source AP3612 Aug. 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 3 Pin Description Pin Number Pin Name Function HSOP-28 SOIC-24 28,1,2,3,4,5, 8,9,10,11,12 ,14 18,19,20,21, 22,23, 1, 2, 3, 4, 5, 7 CH1 to CH12 LED current sink. Leave the pin open directly if not used 6, 21,25 NC No connection 7, 20 24 GND Ground pin 13 6 ISET LED current setting pin. The corresponding maximum current of all strings is set through connecting a resistor from this pin to GND 15 8 OVP Over voltage protection pin. When the OVP pin voltage exceeds 2.0V, the OVP is triggered and the power switch is turned off. When the OVP pin voltage drops below hysteresis voltage, the OVP is released and the power switch will resume normal operation 16 9 RT Frequency control pin 17 10 EN ON/OFF control pin. Forcing this pin above 2.4V enables the IC while below 0.5V shuts down the IC. When the IC is in shutdown mode, all functions are disabled to decrease the supply current below 3 µA 18 11 CS Power switch current sense input 19 12 OUT Boost converter power switch gate output. This pin output high voltage (5V/VIN-0.5V) to drive the external N-MOSFET 22 13 VCC 5V linear regulator output pin. This pin should be bypassed to GND (recommend to connect with GND pin) with a ceramic capacitor 23 14 VIN Supply input pin. A capacitor (typical 10 µF) should be connected between the VIN and GND to keep the DC input voltage constant 24 15 STATUS LED operation status output 26 16 COMP Soft-start and control loop compensation 27 17 DIM PWM dimming control pin. Adding a PWM signal to this pin to control LED dimming. If not used, connect it to the high level |
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