AL1794EV1: 4 Channel LED Driver, 6.5 ~ 30V in

Summary

These four key elements, AC-to-DC Power Stage, LED Driver, LED Emitter Module and Wireless Connectivity block (enabled by embedded MCU and RF), form a typical system configuration for Smart Connected Lighting (SCL) bulbs.

AL1794, a four-channel Constant Current Regulator (CCR) LED driver with analog and PWM dimming control, is targeted for Tunable White/Color SCL applications. Powered by Constant Voltage (CV) power source(s) provided by an AC-DC Power Conversion Block, AL1794 generates Constant Currents (CC) driving attached LED emitter strings. The channel currents are further modulated by analog or digital PWM signals generated by the associated external MCU.

Specifications

Manufacturer	Diodes Incorporated
Category	Lighting
Sub-Category	LED Drivers - DC In
Eval Board Part Number	AL1794EV1DI-ND
Eval Board Supplier	Diodes Incorporated
Eval Board	Normally In Stock
Voltage In	6.5 ~ 30 VDC
Topology	Step Down
Current Out	250mA (x2), 187mA, 62mA 500mA (x2), 375mA, 125mA
Voltage Out (Max)	- Not Given
Outputs and Type	4 Non-Isolated
Efficiency @ Conditions	- Not Given
Features	Current Limit (Adj. or Fixed) Dimming Control Open Circuit Protection PWM Interface Short Circuit Protection Shutdown, Enable, Standby Thermal Protection Under Voltage Protection, Brown-Out
Switching Frequency	500 Hz ~ 4 kHz
Component Count + Extras	12 + 6
Design Author	Diodes/Zetex
Application / Target Market	Lighting: LED Commercial Lighting Lighting: LED Home Lighting
Main I.C. Base Part	AL1794
Date Created By Author	2015-07
Date Added To Library	2016-08