DESCRIPTION

The MP4658 is a 4-string, secondary-side LED

driver for LED backlighting, and is ideal for

monitor and small-sized TV LED backlighting. It

controls the flyback power stage to regulate the

LED current loop and the output supply voltage.

The MP4658 integrates 4-string LED current

balancing. Powered by a 6V to 36V input supply

voltage (VIN), the MP4658 outputs a

compensation signal to control the primary-side

flyback (or other power stage) via an

optocoupler to regulate the output voltage

(VOUT).

The MP4658 supports analog dimming and

PWM dimming to the LED current through the

ADIM and PDIM pins. For analog dimming,

apply a pulse signal with a frequency above

5kHz to the ADIM pin. For PWM dimming, apply

a low-frequency PWM signal to the PDIM pin.

The MP4658 also supports analog mode PWM

dimming to the LED current, which makes the

LED current rise and fall softly.

The MP4658 features numerous smart

protections to increase system reliability,

including open LED protection, short LED string

protection, LEDx short-to-ground protection, FB

over-voltage protection (OVP), feedback open

protection, and thermal protection. The MP4658

is available in an SOIC-16 package.

FEATURES

• 6V to 36V Supply Voltage (VIN)

• 80V/200mA, 4-String LED Current Balance

• Provides Feedback for the Previous Power

Stage

• <2 LED Current Accuracy

• 1.5 LED Current Balance

• Low LEDx Regulation Voltage, High

Efficiency

• Analog and PWM Dimming

• LED Open Protection, LED Short Protection

• LEDx Pin Short-to-GND Protection

• Over-Voltage Protection (OVP)

• Thermal Protection

• Available in an SOIC-16 Package

APPLICATIONS

• LCD Monitor and TVs

• Desktop LCD Flat Panel Displays

• Flat-Panel Video Displays

MP4658GS属于集成电路（IC） > LED 驱动器。美国芯源系统有限公司制造生产的MP4658GSLED 驱动器器件属于 LED 驱动器电源管理集成电路 (PMIC) 系列，可通过标称固定电压的电源为负载（通常为发光二极管）提供电流，并且电流可控。它与用于电压调节的类似产品的主要区别在于，这类器件提供较低的反馈电压（以提高系统能效），而且通常可对器件工作点进行外部控制，可在照明应用中用于实现调光功能。