SY7704 - 4-string LED Driver with Build-in Boost Regulator-Silergy Corp._

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SY7704 - 4-string LED Driver with Build-in Boost Regulator

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Product details

Supply Ability

Warranty(Year)：1 Year

Product Specifications

Product Description

Features

Programmable switching frequency to achieve best efficiency and EMI performance
Drive up to 4 strings of LEDs with up to 12 LED per string
Minimum on time: 80ns typical
Adjustable over voltage protection
Low Rdson of internal boost switch: 220mohm
PWM dimming control: 0%~100%
Dimming Frequency: 100Hz~30kHz
+/-2% current matching among strings guaranteed for above 10% dimming level
Programmable LED current: up to 40mA per string. +/-3% accuracy
Internal softstart
Compact packages: QFN3x3-16

Typical Application

Description

SY7704 develops a high efficiency boost regulator with four matching current source to drive up to four strings of white LEDs in the backlight applications of LCD panels.
The device operates over a wide input voltage range of 4V to 24V. SY7704 has adjustable switching frequency from 300kHz to 2MHz. The LED current can be programmed from 10mA to 40mA. SY7704 also integrates PWM dimming function for accurate LED current control.
The SY7704 is available in QFN3x3-16 package.