AL1672-40CSP-13 Diodes Incorporated

AL1672 SINGLE STAGE DIMMABLE BUCK CONVERTER WITH 600V/4A MOSFET Description Pin Assignments The AL1672 is a high performance single stage Buck convertor, (Top View) targeting dimmable LED lighting application. It is operating at BCM mode which results in good EMI and efficiency. The AL1672 can support multiple dimming modes. When a 0.3~2.4V 8 CS 1 COMP DC signal is applied on APWM pin, the device will operate in analog dimming mode. When a digital signal is applied on APWM pin, the GND 2 7 APWM EP device works at PWM dimming mode. DRAIN 3 6 FB The AL1672 features low start-up current and low operation current. It integrates multiple protections including over voltage, short circuit, DRAIN 4 5 VCC over current and over temperature protection. It also integrates 600V/4A high voltage MOSFET. The AL1672 is available in SO-8EP package. SO-8EP Features Applications Valley Switching for Low Switching Loss General LED Lighting Driver with Dimming Function Low Start-Up Current General Purpose Constant Current Source High PF and Low THD Smart LED Lighting High Efficiency Tight LED Current Variation Range Tight Output Open Voltage Variation Range Integrates 600V/4A MOSFET Support Both PWM Dimming and Analog Dimming PWM Dimming Range:3% to 100% at 1kHz PWM Frequency Analog Dimming and PWM-to-DC Dimming Range:18% to 100% Internal Protections Under Voltage Lock Out (UVLO) Output Over Voltage Protection (OVP) Output Short Protection (OSP) Over Current Protection (OCP) Thermal Fold-Back Protection (TFP) Over Temperature Protection (OTP) Low System Cost Package: SO-8EP 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 AL1672 Typical Applications Circuit L1 F1 R TH D1 + C AC R4 OUT V R3 R1 C2 Input C1 4 C VCC DB1 R5 D2 5 6 R6 VCC FB 7 PWM/DC APWM Signal 3 DRAIN L2 8 COMP 4 DRAIN GND CS R COMP 2 1 C COMP R CS AL1672 BUCK Application Circuit Pin Descriptions Pin Number Pin Name Function Current sense pin, connect this pin to the source of the primary 1 CS switch 2 GND Ground 3,4 DRAIN Drain of internal MOS Supply voltage of gate driver and control circuits of the IC 5 VCC 6 FB The feedback voltage sensing from the auxiliary winding Analog dimming input pin or PWM signal input pin in PWM dimming 7 APWM mode 8 COMP Loop compensation pin 9 Exposed Pad Drain of internal MOS 2 of 14 AL1672 July 2017 Diodes Incorporated www.diodes.com Document number: DS39344 Rev. 1 - 2 NEW PRODUCT