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RT8489 - High Voltage 4-CH LED Driver Controller

Description

The RT8489 is a 4-CH LED driver controller that delivers well matched LED current to each channel of LED string.

With external current sources, the number of LEDs per string is only limited by the current source and the VIN/ VOUT conditions.

Features

  • include adjustable output over voltage protection, PWM switch current limit and thermal shutdown. Features z Wide Operation Voltage Range : 7V to 28V z Programmable Channel Current z 3% Current Matching Accuracy between Channels z Adjustable Switching Frequency z Easy Analog and Digital Dimming Control z Adjustable Soft-Start z Adjustable Output Over Voltage Protection z Under Voltage Lockout and Thermal Shutdown z SOP-24 package z RoHS Compliant and Halogen Free.

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Datasheet Details

Part number RT8489
Manufacturer Richtek
File Size 301.20 KB
Description High Voltage 4-CH LED Driver Controller
Datasheet download datasheet RT8489 Datasheet

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Full PDF Text Transcription

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® RT8489 High Voltage 4-CH LED Driver Controller General Description The RT8489 is a 4-CH LED driver controller that delivers well matched LED current to each channel of LED string. With external current sources, the number of LEDs per string is only limited by the current source and the VIN/ VOUT conditions. The current mode PWM Boost type controller operates at an adjustable switching frequency of up to 1MHz, with a wide VIN range covering from 7V to 28V. The switch driver is designed to drive industrial grade high power MOSFETs. The PWM loop selects and regulates the LED string with the highest voltage string to 0.7V, thus allowing voltage mismatches between the LED strings.
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