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CL8801

Microchip
Part Number CL8801
Manufacturer Microchip
Description Sequential Linear LED Driver
Published Jan 28, 2024
Detailed Description CL8801 Sequential Linear LED Driver Features • Minimal Component Count  (Base Configuration: CL8801 + Four Resistors +...
Datasheet PDF File CL8801 PDF File

CL8801
CL8801

Overview
CL8801 Sequential Linear LED Driver Features • Minimal Component Count  (Base Configuration: CL8801 + Four Resistors + Diode Bridge) • No Magnetics, No Capacitors • Up to 7.
5W Output (13W with Heat Sink) • >110 Lm/W using Efficient LEDs • 85% Typical Electrical Efficiency • >0.
95 Power Factor • <30% THD Line Current • Low Conducted EMI without Filters • 85% LED Luminous Utilization • Phase Dimmer Compatible with an RC Network Applications • Fluorescent Tube Retrofit • Incandescent and CFL Bulb Replacement • General LED Lighting General Description The CL8801 is designed to drive a long string of inexpensive, low-current LEDs directly from the AC mains.
A basic driver circuit consists of CL8801, four resistors and a bridge rectifier.
Two to four additional components are optional for various levels of transient protection.
No capacitors, EMI filters or power factor correction circuits are needed.
A string of series/parallel LEDs is tapped at four locations.
Four linear current regulators sink current at each tap and are sequentially turned on and off, thereby tracking the input sine wave voltage.
Voltage across each regulator is minimized when conducting, providing high efficiency.
Output current at each tap is individually resistor-adjustable.
Cross-regulation, as the CL8801 switches from one regulator to another, provides smooth transitions.
The current waveform can be tailored to optimize for input voltage range, line/load regulation, output power/current, efficiency, power factor, THD, dimmer compatibility and LED utilization.
With the addition of an RC network, the driver is compatible with phase dimming.
Package Type 33-lead QFN (Top view) BIAS TAP1 TAP2 NC TAP3 NC TAP4 33 GND 1 GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND SET1 NC SET2 NC SET3 NC NC NC SET4 NC See Table 2-1 for pin information.
 2017 Microchip Technology Inc.
DS20005601A-page 1 CL8801 Functional Block Diagram 120V transient protection AC Mains TAP1 BIAS 10...


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