Diodes Incorporated — Analog and discrete power solutions
SO 16

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AL3066 (NRND)

NRND = Not Recommended for New Design

Four-Channel Current Source Boost LED Driver

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Description

The AL3066 is a high efficiency 4-channel boost controller for WLED backlight applications. It operates over a wide input voltage ranged from 4.5V to 33V.

The current of the 4 channels is simply programmed from 20mA to 400mA with an external resistor. The current match between any channel is ±1.5% (typical). Its operating frequency can be adjusted from 0.1MHz to 1MHz.

The AL3066 can support two dimming modes: direct PWM dimming, PWM to analog dimming.

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.

Feature(s)

  • Input Voltage Range: 4.5V to 33V
  • Drivers up to 4 Strings in Parallel, 250mA per String, 400mA Pulse Current
  • ±3% Current Precision
  • Low Ripple for Low BOM Cost
  • 4KV HBM ESD Class
  • High Voltage Pins CS and OVP for Safety Test
  • Support Direct PWM Dimming, PWM to Analog Dimming 
  • Minimum PWM Dimming Duty Cycle can be 1/10,000 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

Application(s)

  • LCD Monitor 
  • LCD Display Module
  • LCD TV

Product Specifications

Product Parameters

AEC-Q100 Grade No
Compliance (Only Automotive supports PPAP) Standard
Compliance (Only Automotive supports PPAP) Standard
Dimming PWM or PWM to DC
Dimming (Analog) PWM to DC
Dimming (PWM) Yes
Efficiency (%) 95
Function Boost Controller with 4- Channel Current Sink
LED Current Accuracy (%) 3
MaximumInput Voltage (V) 40
Maximum LED Current (A) 0.4
Maximum Output Current per Channel 400
Maximum Output Voltage (V) 60
MinimumInput Voltage (V) 4.5
Number of Regulated Output Channels 4
OperatingTemperatureRange  (°C) -40 to 85
OVP Yes
AEC Qualified No
Quiescent Current (µA) 3
Sense/Feedback Voltage (mV) N/A
Soft Start Yes
Standby Quiescent Current (µA) 1
SW RDS(ON) External MOSFET
Switching Frequency (MHz) ADJ 0.1  to  1
Switching Frequency Maximum (kHz) 1000
Topologies (Boost) Yes
Topologies (Buck-Boost) No
Topologies (Buck) No
Typical Overcurrent Protection Current 540/RCS
VFB N/A

Related Content

Packages

Applications

Technical Documents

Recommended Soldering Techniques

TN1.pdf

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-2567 2022-03-30 2022-09-30 Device End of Life (EOL)