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Description

The AL8805 is a step-down DC/DC converter designed to drive LEDs with a constant current. The device can drive up to 8 LEDs, depending on the forward voltage of the LEDs, in series from a voltage source of 6V to 36V. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. The AL8805 switches at frequency up to 1MHz. This allows the use of small size external components, hence minimizing the PCB area needed. Maximum output current of AL8805 is set via an external resistor connected between the VIN and SET input pins. Dimming is achieved by applying either a DC voltage or a PWM signal at the CTRL input pin. An input voltage of 0.4V or lower at CTRL switches off the output MOSFET simplifying PWM dimming.

Application

  • MR16 lamps
  • General illumination lamps

Features

  • LED Driving Current up to 1A
  • Better than 5% Accuracy
  • High Efficiency up to 98%
  • Operating Input Voltage from 6V to 36V
  • High Switching Frequency up to 1MHz
  • PWM/DC Input for Dimming Control
  • Built-In Output Open-Circuit Protection
  • SOT25: Available in “Green” Molding Compound (No Br,Sb) with lead Free Finish/ RoHS Compliant

Product Specifications

Product Parameters

Qualified to AECQ10x -
Automotive Compliant PPAP -
Topologies (Buck) Yes
Topologies (Buck-Boost) -
Topologies (Boost) -
Minimum Input Voltage 6 V
Maximum Input Voltage 36 V
Maximum Output Voltage 36 V
Maximum LED Current 1 A
LED Current Accuracy 5 %
Switching Frequency Maximum 1000 kHz
Dimming (PWM) Yes
Dimming (Analog) Yes
Efficiency 98 %
Operating Temperature Range -40 to 125 °C
Sense Voltage 100 mV
AEC-Q100 Grade -

Related Content

Packages
SOT25

Quality & Reliability

Technical Documents

SPICE Model

User Guides and EV Boards

Recommended Soldering Techniques
Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Region
AL8805W5-7 Mouser Electronics Inc. 17088 11/19/2017 Buy Now Americas
AL8805W5-7 Arrow Electronics 257 11/19/2017 Buy Now Americas
AL8805W5-7 Avnet 6000 11/18/2017 Buy Now Americas
AL8805W5-7 Digi-Key Electronics 61720 11/19/2017 Buy Now Americas
AL8805W5-7 Future Electronics - Asia 39000 11/17/2017 Buy Now Asia Pacific