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LC5910S

LC5910S is a buck single-output LED driver IC that achieves the LED drive with few components, high efficiency, and high accuracy. The IC has various protections and configures various LED circuits. The PWM dimming and the three-level dimming (the reference voltage selection function for LED current limiting) are available.

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Features

    Converter Parts
    ● Critical Current Mode (CRM) Control
       (Low switching loss, low noise, reduction in the number
       of components)
    ● Enable Function
    ● Bottom Detection Voltage 100 mV (typ.)

    LED Control Parts
    ● PWM Dimming Function
    ● Reference Voltage Selection Function for LED
       Current Limitting (three levels, 75% to 100%)
    ● Current Reference Accuracy: ±1%

    Protections
    ● LED Output Short Circuit Protection: Pulse-by-pulse
    ● Current Detection Short Circuit Protection: Autorestart
    ● Input Voltage Drop Protection: Auto-restart
    ● Overvoltage Protection (OVP): Auto-restart, fault output
    ● Thermal Shutdown (TSD) with Hysteresis: Autorestart

Application

    ● LED Back Light
    ● LED Lighting Equipment
    ● LED Bulbs

Specifications

Type Controller
Circuit Type Buck
Isolated / Non-Isolated Non-Isolated
MOSFET Breakdown Voltage V
On-Resistance Ω
Output Power / Output current
OCP YES
OLP
OVP YES
LED Open / Short Protection
Dimming Function Analog / PWM
Package Weight (Typ.) 0.078 g
Automotive Qualified NO

Block Diagram

Block Diagram

Pin Configuration Definitions

Pin Configuration Definitions

Questions or Comments?

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