LED

CL6808 PDF Datasheet – 1.2A LED Driver – Chiplink

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This post describes for the LED Driver. An LED driver is an electronic device that regulates and controls the power supplied to light-emitting diodes (LEDs).

The Part Number is CL6808.

The package is SOT89-5 type.

The function of this semiconductor is 1.2A LED driver with internal switch.

The manufacturer of this part is CHIPLINK.

See the preview image and the PDF file for more information.

Image

CL6808 datasheet pdf

Description

The CL6808 is a continuous mode inductive step-down converter, designed for driving single or multiple series connected LEDs efficiently from a voltage source higher than the LED voltage. The device operates from an input supply between 7V and 40V and provides an externally adjustable output current of up to 1.2A. Depending upon supply voltage and external components, this can provide up to 35 watts of output power. The CL6808 includes the output switch and a high-side output current sensing circuit, which uses an external resistor to set the nominal average output current.

Features

  • Wide input voltage range: 6V to 35V
  • Adjustable constant output current up to 1.2A
  • Integrated power switch (no external MOSFET required)
  • High efficiency: up to 95%
  • High-side current sensing using external resistor
  • Simple design with low external component count
  • Single-pin control for ON/OFF and brightness (DC or PWM dimming)
  • Soft-start function to limit inrush current
  • Typical ±5% LED current accuracy
  • Inherent open-circuit LED protection

Design Notes

  • Inductor selection is critical: choose based on ripple current (typically 20–40% of ILED)
  • Use low ESR capacitors to reduce output ripple and improve stability
  • Schottky diode is recommended for higher efficiency
  • PWM dimming frequency should be chosen to avoid visible flicker (>1 kHz typical)
  • Thermal design is important at high currents—ensure adequate copper area for heat dissipation
  • Layout should minimize loop area of switching path to reduce EMI

Block Diagram

CL6808 pdf datasheet

Advantages

  • Minimal external components → reduced BOM cost
  • Integrated switch simplifies design
  • High efficiency improves thermal performance
  • Flexible dimming control (analog + PWM)
  • Robust protection features

Typical Applications

  • LED retrofit lamps (halogen replacement)
  • Automotive lighting systems
  • Industrial LED lighting
  • Emergency and backup lighting
  • Signage and display illumination

Alternative / Equivalent Products

  • PT4115 – Popular LED buck driver (lower power range)
  • HV9910 – Offline/high-voltage LED driver
  • LM3404 – TI constant current LED driver
  • AL8805 – Diodes Inc. LED driver
  • MP24833 – MPS LED driver IC

CL6808 PDF Datasheet

TM1628 PDF Datasheet – LED Controller Driver

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This is a multifunction LED driver controller designed for key scanning and display management, supporting up to 11 segment outputs and 6–7 grid outputs in a compact integrated circuit.

Part Number: TM1628

Function: LED Controller Driver

Package: SO 28 Pin Type

Manufacturer: Shenzhen Titan Micro Electronics, Goston

Images:TM1628 pdf datasheet

Description

The TM1628 is an LED Controller driven on a 1/7 to 1/8 duty factor. Eleven segment output lines, six grid output lines, 1 segment/grid output lines, one display memory, control circuit, key scan circuit are all incorporated into a single chip to build a highly reliable peripheral device for a single chip microcomputer. Serial data is fed to TM1628 via a three-line serial interface.

It integrates display memory, control logic, and an 8-step dimming circuit while operating through a simple three-wire serial interface. This device is commonly used in embedded systems requiring LED display control and keypad interfacing such as home appliances and consumer electronics.

Features

  • CMOS technology ensuring low power consumption
  • Supports multiple display configurations from 11 segments / 7 grids to 12 segments / 6 grids
  • Integrated key scanning function supporting 8 × 2 matrix
  • Built-in 8-level brightness control for LED dimming
  • Three-wire serial interface (CLK, DIO, STB) for easy MCU communication
  • Internal display RAM for segment data storage
  • High integration reduces external component count

Pinouts

TM1628 pinout

LED controller drivers are used in a wide range of applications, including residential and commercial lighting, automotive lighting, signage, displays, and more. Choosing the right LED driver is crucial to ensure the optimal performance and longevity of LEDs in a specific application.

How to Choose This Part

  • Select when both LED driving and key scanning are required in one IC
  • Ideal for reducing MCU GPIO usage via serial interface
  • Suitable for medium-sized segment displays with multiplexing
  • Choose based on required segment/grid configuration
  • Consider alternatives if higher current driving or larger displays are needed

Applications

  • Consumer electronics display panels
  • Microwave ovens and washing machine interfaces
  • Audio system front panels
  • Digital clocks and timers
  • Embedded system user interfaces
  • Instrumentation displays with keypad input

Alternative / Equivalent Products

  • TM1638 LED driver with extended key scan capability
  • HT1628 LCD/LED driver controller
  • MAX7219 LED display driver for serial interfacing
  • PT6961 LED driver with key scan function
  • FD650 LED controller for similar display applications

TM1628 PDF Datasheet


TM1628 pdf