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AL8807A (Not Recommended for new design)

NRND = Not Recommended for New Design

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Description

The AL8807A is a step-down DC/DC converter designed to drive LEDs with a constant current. The device can drive up to 9 white high brightness LEDs in series from a voltage source of 6V to 36V. The AL8807A has an extended CTRL pin voltage range; increasing its analog dimming range to greater than 10:1. The improved analog dimming range makes it suitable for a variety of lighting applications requiring wide analog dimming ranges. The AL8807A switches at frequency up to 1MHz with controlled rise and fall times to reduce EMI. This allows the use of small size external components, hence minimizing the PCB area needed. Maximum output current of AL8807A is set via an external resistor connected between the VIN and SET input pins. Over Temperature Protection is incorporated so that should a fault occur the device will automatically shut-down and only restart when its junction temperature has coo°C down.

Feature(s)

  • LED Driving Current up to 1A/1.3A
  • Better than 5% Accuracy
  • High Efficiency Up to 96%
  • Optimally Controlled Switching Speeds
  • Operating Input Voltage from 6V to 36V
  • Wide Analog Input Range for Dimming Control (>10:1)
  • Built-in Protection Features:

Application(s)

  • General Illumination Lamps
  • 12V Powered LED Lamps
  • Wide Analog Dimming Range LED Lamps

Product Specifications

Product Parameters

AEC-Q100 Grade No
Compliance (Only Automotive supports PPAP) Standard
Dimming (Analog) Yes
Dimming (PWM) No
Efficiency (%) 97
LED Current Accuracy (%) 5
MaximumInput Voltage (V) 36
Maximum LED Current (A) 1.3
Maximum Output Voltage (V) 36
MinimumInput Voltage (V) 6
OperatingTemperatureRange  (°C) -40 to 125
AEC Qualified No
Sense Voltage (mV) 100
Switching Frequency Maximum (kHz) 1000
Topologies (Boost) No
Topologies (Buck-Boost) No
Topologies (Buck) Yes

Related Content

Packages

Technical Documents

SPICE Model

Recommended Soldering Techniques

TN1.pdf

RoHS CofC

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