AL1791/1792/1793/1794 Single/Dual/Triple/Quad-Channel Current-Ratio-Optimized LED Driver with Analog and PWM Dimming U-DFN-4030-14 Description Pin Assignments The AL1791/1792/1793/1794 (or collectively AL179x), a single/multi- Top View channel LED driver with analog and PWM dimming control, is (U-DFN4030-14) targeted for Tunable White/Color Smart Lighting application. It serves as the LED driving element along with AC-DC Power Conversion Block and Intelligent wireless MCU as an emerging smart-connected EN 1 14 VIN lighting system configuration. The key merits attribute to cost- PWM4/GND 2 13 REF effectiveness, dimming performance, low standby power, ease of system implementation, and great scalability. AL1791, AL1792, 3 12 FAULTB PWM3/GND AL1793, and AL1794 are 1-channel, 2-channel, 3-channel, and 4- channel LED drivers, respectively. PWM2/GND 4 11 LEDPG The IC is available in U-DFN-4030-14 package. 5 10 PWM1 LED4/GND LED1 6 9 LED3/GND LED2/GND 7 8 GND Features Applications Input Voltage Range: 6.5V to 30V 1-Channel Dimmable Smart Connected Light (SCL) Bulbs 1/2/3/4-channel LED drivers: independent Analog or PWM dimming control for each channel 2-Channel Tunable White SCL Bulbs 3-Channel Tunable White or Color SCL Bulbs Reference Current: Adjustable by an external reference resistor Ratio-optimized currents for 4 independent LED channels 4-Channel Tunable White+Color SCL Bulbs (AL1794 only): Suitable for Tunable White and Tunable Color Smart Connected LED Tubes, Panel Lights, Troffers, and Ceiling Low Standby Power: With EN pin Lights E-flicker free High Frequency PWM dimming with Deep Dimming Capability: Support 10KHz down to 1.0%, 4KHz down to 0.4%, or 1KHz down to 0.1% Internal Protections: Under Voltage Lockout (UVLO), LED string open/short protection Over-temperature protection (OTP): Thermal shutdown and auto thermal recovery Fault Reporting: UVLO, OTP, Open, and Short LED Power Good Reporting Low system BOM cost Ambient Temperature Range -40C to +125C U-DFN4030-14: Available in Green Molding Compound (No Br, Sb) Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See AL1791/1792/1793/1794 Typical Applications Circuit VLED1 85~265Vac 2700K AP3983C AC-DC Conversion VIN X8 V adjustment IN signal 3.3V AL1791 LED1 R FAULT R LEDPG FAULTB LEDPG Wireless/Color EN management PWM1 REF MCU GND R SET Figure 1. 1-Channel Dimmable White VLED1 85~265Vac 2700K 6500K AP3983C AC-DC Conversion VIN X8 X8 V adjustment IN signal 3.3V AL1792 R LED1 FAULT LED2 R LEDPG FAULTB LEDPG Wireless/Color EN management PWM1 REF MCU PWM2 GND R SET Figure 2. 2-Channel Tunable White VLED2 VLED1 85~265Vac G R B AP3983C AC-DC Conversion VIN V adjustment IN signal 3.3V AL1794 LED1 R FAULT LED2 R LEDPG LED3 FAULTB LED4 LEDPG Wireless/Color EN management PWM1 REF MCU PWM2 GND R SET PWM3 PWM4 Figure 3. 3-Channel Tunable Color 2 of 18 AL1791/1792/1793/1794 September 2015 Diodes Incorporated www.diodes.com Document number:37957 Rev. 3 - 2 ADVANCED INFORMATIO