Diodes Incorporated
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AP3612 (Obsolete)

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The AP3612 is a high efficiency boost controller with 12-string current sources for driving W°C 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 °C protection, VOUT short protection and Schottky diode short-circuit protection.


  • LCD Monitor
  • LCD Display Module
  • LCD TV

Product Specifications

Product Parameters

Dimming PWM
Efficiency (%) 95
Function Boost Controller with Current Sink
MaximumInput Voltage (V) 33
Maximum Output Current per Channel 75
Maximum Output Voltage (V) 60
MinimumInput Voltage (V) 4.5
Number of Regulated Output Channels 12
OperatingTemperatureRange  (°C) -40 to 85
Quiescent Current (µA) 3
Soft Start Yes
Standby Quiescent Current (µA) 0.1
Switching Frequency (MHz) ADJ 0.1  to  1
Typical Overcurrent Protection Current 540/RCS

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Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2380 2018-11-07 2019-05-07 Device End of Life (EOL)