OBSOLETE

LC5830K

Package Image

Package : eSOIC8

RoHS : YES

Data Sheet(1.7MB)

The LC5830K is a single IC switching regulator that provides constant-current output to drive high-power LEDs. It integrates a high-side N-channel DMOS switch for DC-to-DC step- down (buck) conversion. A true average current is output using a cycle-by-cycle, controlled on-time method. Output current is user-selectable by an external current sense resistor. Output voltage is automatically adjusted to drive various numbers of LEDs in a single string. This ensures the optimal system efficiency. LED dimming is accomplished by a direct logic input pulse width modulation (PWM) signal at the enable pin. The device is provided in a compact 8-pin narrow SOIC package with exposed pad for enhanced thermal dissipation.It is lead (Pb) free, with 100% matte tin leadframe plating.

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Design Support

  • Technical Documents

Technical Documents

Features

    ・Supply voltage 6 to 48 V
    ・True average output current control
    ・3.0 A maximum output over operating temperature range
    ・Cycle-by-cycle current limit
    ・Integrated MOSFET switch
    ・PWM Dimming Freqency: 100 to 2000Hz
    ・Internal control loop compensation
    ・Undervoltage lockout (UVLO) and thermal shutdown protection

Application

･General high power LED lighting
･Display case lighting, and industrial lighting

Specifications

Type
Circuit Type Buck
Isolated / Non-Isolated Non-Isolated
MOSFET Breakdown Voltage 50 V
On-Resistance 0.25 Ω
Output Power / Output current 3.0A
OCP Pulse by pulse
OLP Latch / Auto Restart
OVP None
LED Open / Short Protection NO
Dimming Function Analog
Package Weight (Typ.)
Automotive Qualified

Block Diagram

Block Diagram

Pin Configuration Definitions

Pin Configuration Definitions

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