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AF1503 - Step-Down LED Driver

Download the AF1503 datasheet PDF. This datasheet also covers the AF1503-Alfa variant, as both devices belong to the same step-down led driver family and are provided as variant models within a single manufacturer datasheet.

General Description

AF1503 is a step down LED driver that is designed to meet least 2A continuous output current for high power LED application, and utilizes PWM control scheme that switches with 150Khz fixed frequency.

The input voltage range of AF1503 is from 4.2V to 40V.

Key Features

  • Input voltage: 4.2V to 40V. Low Feedback Voltage 0.21V. Driving up to 30 LEDs (1W 6S-5P) at 24VIN Oscillation frequency: 150KHz typ. Soft-start, Current limit, Enable function Great Output Capability PWM or Analog Dimming Control Thermal Shutdown function Built-in internal P-channel MOS SOP-8P Package.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (AF1503-Alfa-MOS.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number AF1503
Manufacturer Alfa-MOS
File Size 279.85 KB
Description Step-Down LED Driver
Datasheet download datasheet AF1503 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
Alfa-MOS Technology AF1503 150KHz, 2A / 40V Step-Down LED Driver General Description AF1503 is a step down LED driver that is designed to meet least 2A continuous output current for high power LED application, and utilizes PWM control scheme that switches with 150Khz fixed frequency. The input voltage range of AF1503 is from 4.2V to 40V. It is suitable for series-parallel 1W, 3W, or 5W high power LED application due to the high operation voltage and output capability. At 24V input voltage, this device can drive up to 30pcs 1W LED (6S-5P) with constant 350mA LED current. The PWM control circuit is able to very the duty ratio linearly from 0 up to 100%. This device also contains an error amplifier circuit as well as a soft-start circuit that prevents overshoot at startup.