AP3612

Preliminary Datasheet Boost Type LED Driver with 12-Channel Current Source AP3612 General Description The AP3612 is a high efficiency boost controller with 12-string current sources for driving WLED backlight. It operates over a wide input voltage range from 4.5V to 33V. The current of 12 strings are simply programmed from 20mA to 75mA with an external resistor. The current matching between each string is 1.5% (Typ). Its operating frequency can be adjusted from 0.1MHz to 1MHz. The AP3612 features Cycle-by-cycle Current Limit, Soft Start, Under Voltage Lock Out (UVLO) protection, programmable OVP, Over Temperature Protection (OTP), open/short LED protection, VOUT short protection and Schottky diode short-circuit protection. The AP3612 is available in HSOP-28 and SOIC-24 packages. Features Input Voltage Range: 4.5V to 33V Drives up to 12 Strings in Parallel, 75mA per String Programmable WLED Current from 20mA to 75mA Adjustable Operating Frequency: 100kHz to 1MHz String-to-string Current Matching Accuracy: 1.5% Built-in OCP, OTP, UVLO External PWM Dimming Open/Short LED Protection Programmable Soft Start Programmable OVP Schottky Diode/Inductor Short-circuit Protection VOUT Short/Schottky Diode Open Protection Applications LCD Monitor LCD Display Module LCD TV HSOP-28 SOIC-24 Aug. 2012 Rev. 1. 1 Figure 1. Package Types of AP3612 BCD Semiconductor Manufacturing Limited 1 Preliminary Datasheet Boost Type LED Driver with 12-Channel Current S...