AL1771T16E-13

AL1771/1772 PFC CONTROLLER + SINGLE/DUAL DIMMABLE LINEAR LED DRIVER Description Pin Assignments NEW PRODUCT The AL1771/1772 is a high integration chip with an Offline High Power Factor Correction (PFC) controller and a single/dual-channel Linear LED driver in one package. AL1771/1772 implements an optimized 2-stage topology for a wide power range of Connected Lighting applications. It is targeted for 1-Channel Dimmable and 2Channel Tunable White and various Connected Lighting applications. (Top View) Based on Primary Side Regulation (PSR) implementation, the PFC controller does not require Opto-coupler and any secondary feedback circuit to save overall BOM cost and it operates at Quasi-Resonant (QR) mode where MOSFET is turned on at the valley of the drain voltage, which minimizes switching loss and results in high efficiency. The key merits of the Single/Dual Dimmable Linear LED driver attribute to excellent dimming performance, low standby power, ease of system implementation, and great product scalability. It supports Eflicker free High Frequency PWM dimming with Deep 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 linearity. When no PWM signal is detected by AL1771/1772, the LED driver Section will automatically enter the low-power mode for power saving purpose to be in compliance with Energy Star standby power requirement for Connected Lighting. Integrates Adaptive Thermal Management (ATM) scheme to minimize non-productive power dissipation. TP 1 16 FAULTB REF1 2 15 LEDPG DVCC 3 14 FB 13 COMP NC 4 PWM1 5 12 AVCC DGND 6 11 GD NC 7 10 AGND LED1 8 9 CS EP TSSOP-16EP (Type DX) (AL1771) (Top View) The AL1771/1772 has protection features to ensure robust and safety operation of the Connected Lighting systems. The AL1771/1772 can support applications with LED current (Up 1500mA) and is available in low thermal resistance package TSSOP-16EP (Type DX). REF2 1 16 FAULTB REF1 2 15 LEDPG DVCC 3 14 FB PWM2 4 13 COMP PWM1 5 12 AVCC DGND 6 11 GD LED2 7 10 AGND LED1 8 9 CS EP Features                 High PFC Controller and Dimmable Linear LED Driver in One Package Valley Detection to Achieve Low Switching Loss and High Efficiency Input Voltage Range for LED Driver (DVCC): 6.5V to 30V Each Channel Independent PWM Dimming Control Adjustable Reference Current by External Reference Resistors LED Current Accuracy ≤ ±4% Maximum LED Current 1500mA for AL1771 and 750mA Per Channel to AL1772 Adaptive Thermal Management (ATM) Scheme to Minimize Power Dissipation Low Standby Power Mode with Automatically Enter and Exit High Frequency E-Flicker Free PWM Dimming with Deep Dimming Capability Protections: PFC Controller:  Under Voltage Lockout (UVLO)  Over Voltage Protection (OVP)  Over Current Protection (OCP)  Output Short Protection (OSP)  Over-Temperature Protection (OTP): Thermal Shutdown and Auto Thermal Recovery Dimmable Linear LED Driver:  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 Low System BOM Ambient Temperature Operating Range -40°C to +125°C TSSOP-16EP (Type DX): 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: TSSOP-16EP (Type DX) (AL1772) Applications    1-Channel Dimmable Connected Light Bulbs 2-Channel Tunable White Connected Bulbs Smart Connected LED Tubes, Panel Lights, Troffers, and Ceiling Lights 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 https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain