Diodes Incorporated
SO 16

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Four-Channel Current Source Boost LED Driver

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The AL3069 is a high-efficiency four-channel boost controller for WLED backlight applications. It operates over a wide input voltage range, from 4.5V to 60V.

The current of the four channels is simply programmed from 20mA to 400mA with an external resistor. The current match between any channels is ±0.5% (typical). Its operating frequency can be adjusted from 0.1MHz to 1MHz.

The AL3069 can support two independent dimming modes: direct PWM dimming and PWM to analog dimming. This function makes AL3069 flexible to design in different dimming applications.

Robust protection features include cycle by cycle current limit, soft-start, UVLO, programmable OVP, OTP, open/short LED protection, Schottky diode short and open protection, inductor short-circuit protection and VOUT short protection.

The IC is available in SO-16 package.


  • Input Voltage Range: 4.5V to 60V
  • Drivers up to Four Strings in Parallel, 250mA per String, 400mA Pulse Current
  • Typical ±0.5% Current Matching
  • Low Ripple for Low BOM Cost
  • 4kV HBM ESD Class
  • High Voltage Pins CS and OVP for Safety Test
  • Supports Direct PWM Dimming, PWM to Analog Dimming
  • Minimum PWM Dimming Duty Cycle Can Be 1/5,000 at 100Hz Dimming Frequency
  • LED Open/Short Protection
  • Schottky Diode/Inductor Short-Circuit Protection
  • Built-in OCP, OVP, OTP, UVLO, VOUT Short/Schottky Diode Open Protection
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)
  • For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/


  • LCD monitors
  • LCD display modules
  • LCD TVs

Product Specifications

Product Parameters

AEC Qualified No
Compliance (Only Automotive supports PPAP) Standard
Function Boost LED Driver-Controller
MinimumInput Voltage (V) 4.5 V
MaximumInput Voltage (V) 60 V
Maximum Output Voltage (V) External MOSFET V
Number of Regulated Output Channels 4
Maximum Output Current per Channel 400 mA mA
Typical Over-Current Protection Current 540/RCS mA
Switching Frequency (MHz) adjustable 0.1M to 1M MHz
Efficiency (%) up to 95 %
Quiescent Current (µA) 3000 mA
Standby Quiescent Current (µA) 1 µA
Dimming direct PWM and PWM to Analog
Soft Start Yes
OperatingTemperatureRange  (°C) -40 to 85 °C

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