AL1782T16E-13 Diodes Incorporated

AL1781/1782 Single/Dual Dimmable Linear LED Driver Description Pin Assignments The AL1781/1782, a single/dual-channel dimmable Linear LED driver (Top View) with PWM dimming control, is targeted for 1-Channel dimmable and 2-Channel tunable Smart Connected Lighting (SCL) applications. It 16 VIN 1 REF1 serves as the LED driving element along with AC-DC Power NC 2 15 TP Conversion Block and Intelligent wireless MCU as an emerging NC 3 14 FAULTB connected lighting applications. PWM1 4 13 LEDPG EP GND 5 12 GND The AL1781/1782 key merits attribute to dimming performance, low NC 6 11 GND standby power, ease of system implementation and great scalability. NC 7 10 LED1 It supports High Frequency E-flicker free PWM dimming with Deep NC 8 9 LED1 Dimming Capability: Support 40kHz down to 4%, 10kHz down to 1.0%, 4kHz down to 0.4%, or 1kHz down to 0.1% with good dimming TSSOP-16EP (Type DX) (AL1781) linearity. When no PWM signal is detected by AL1781/1782, it will automatically enter the low-power mode for power saving purpose to (Top View) be in compliance with Energy Star standby power requirement for connected lighting requirements. Integrates Adaptive Thermal VIN 1 16 REF1 Management (ATM) scheme to minimize non-productive power NC 2 15 REF2 dissipation. PWM2 3 14 FAULTB PWM1 4 13 LEDPG EP The AL1781/1782 has protection features, including Under-Voltage- 5 12 GND GND Lockout (UVLO), LED string Open/Short protection and Over- 6 11 NC GND temperature protection (OTP). LED2 7 10 LED1 8 9 LED2 LED1 AL1781 is a single channel and AL1782 is a dual-channel LED driver. They can support high LED current (up to total 1500mA) applications TSSOP-16EP (Type DX) (AL1782) and they are available in Low thermal resistance TSSOP-16EP (Type DX) package. Applications Features 1-Channel Dimmable Connected Light Bulbs 2-Channel Tunable White Connected Bulbs Input Voltage Range: 6.5V to 30V Multiple-Channel of Connected Lighting System Independent PWM Dimming Control for Each Channel Adjustable Reference Current by External Reference Resistors Connected LED Tubes, Panel Lights, Troffers, and Ceiling Lights LED Current Accuracy 4% Maximum LED Current 1500mA for AL1781 and 750mA Per Channel for AL1782 Adaptive Thermal Management (ATM) Scheme to Minimize Power Dissipation Automatically Enter and Exit Low Standby Power Mode High Frequency E-flicker Free PWM Dimming Internal Protections: Under Voltage Lockout (UVLO) LED String Open/Short Protection Over-Temperature Protection (OTP): Thermal Shutdown and Auto Thermal Recovery Fault Reports: UVLO, OTP, LED Open/Short Ambient Temperature Range -40C to +125C TSSOP-16EP (Type DX): 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) & 2015/863/EU (RoHS 3) compliant. 2. See AL1781/1782 Typical Applications Circuit V up to 30V 85~265V IN AC C IN AC-DC Conversion VIN AL1781 3.3V LEDPG LED1 R LEDPG R FAULTB FAULTB Wireless/Color management PWM1 REF1 MCU R SET1 GND EP Figure 1. Channel Dimmable White V up to 30V IN 85~265V AC C IN AC-DC Conversion VIN AL1782 3.3V LEDPG LED1 R LEDPG LED2 R FAULTB FAULTB Wireless/Color management PWM1 REF1 MCU PWM2 REF2 R R SET2 GND SET1 EP Figure 2. Channels Tunable White 2 of 18 AL1781/1782 August 2018 Diodes Incorporated www.diodes.com Document number: DS41312 Rev. 1 - 2 NEW PRODUCT