The CL8801 is a Sequential Linear LED Driver designed for driving long strings of low-current LEDs directly from the AC mains. It requires minimal external components, consisting of just the CL8801, four resistors, and a bridge rectifier, with optional components for transient protection. The driver operates without the need for capacitors, EMI filters, or power factor correction circuits. It can deliver up to 7.5W output power, or 13W with a heat sink, while achieving over 110 lumens per watt with efficient LEDs. The device boasts a typical electrical efficiency of 85%, a power factor greater than 0.95, and a total harmonic distortion (THD) of less than 30%. The CL8801 features low conducted EMI without filters and provides 85% LED luminous utilization. It is also compatible with phase dimming when used with an RC network, making it suitable for various lighting applications, including fluorescent tube retrofits and incandescent bulb replacements.
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 the 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, 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.
Additional Features
| Microchip Technology, Inc. | |
|---|---|
| Product Category | LED Drivers |
| Product Number | CL8801 |
| Product Name | Sequential Linear LED Driver |
| Form Factor | Intgrated Circuit (IC) |
