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AL1672 Dataheets PDF



Part Number AL1672
Manufacturers Diodes
Logo Diodes
Description SINGLE STAGE DIMMABLE BUCK CONVERTER
Datasheet AL1672 DatasheetAL1672 Datasheet (PDF)

NOT RECOMMENDED FOR NEW DESIGN NO ALTERNATIVE PART AL1672 SINGLE STAGE DIMMABLE BUCK CONVERTER WITH 600V/4A MOSFET Description The AL1672 is a high performance single stage Buck convertor, 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 DC signal is applied on APWM pin, the device will operate in analog dimming mode. When a digital signal is applied on APWM pin, th.

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NOT RECOMMENDED FOR NEW DESIGN NO ALTERNATIVE PART AL1672 SINGLE STAGE DIMMABLE BUCK CONVERTER WITH 600V/4A MOSFET Description The AL1672 is a high performance single stage Buck convertor, 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 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 device works at PWM dimming mode. The AL1672 features low start-up current and low operation current. It integrates multiple protections including over voltage, short circuit, over current and over temperature protection. It also integrates 600V/4A high voltage MOSFET. The AL1672 is available in SO-8EP package. Pin Assignments (Top View) CS 1 GND 2 EP DRAIN 3 DRAIN 4 SO-8EP 8 COMP 7 APWM 6 FB 5 VCC Features Applications • Valley Switching for Low Switching Loss • Low Start-Up Current • High PF and Low THD • 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) • General LED Lighting Driver with Dimming Function • General Purpose Constant Current Source • Smart LED Lighting • 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 http://www.diodes.com/quality/lead_free.html 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 <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds. AL1672 Document number: DS39344 Rev. 2 - 3 1 of 14 www.diodes.com February 2021 © Diodes Incorporated Typical Applications Circuit AL1672 F1 AC Input VR1 L1 C1 DB1 RTH D1 C2 CVCC PWM/DC Signal RCOMP CCOMP 5 7 VCC APWM FB 6 8 COMP DRAIN DRAIN 3 4 GND CS 2 1 RCS R4 R5 R6 Pin Descriptions AL1672 BUCK Application Circuit R3 +C OUT 4 D2 L2 Pin Number 1 2 3,4 5 6 7 8 9 Pin Name CS GND DRAIN VCC FB APWM COMP Exposed Pad Function Current sense pin, connect this pin to the source of the primary switch Ground Drain of internal MOS Supply voltage of gate driver and control circuits of the IC The feedback voltage sensing from the auxiliary winding Analog dimming input pin or PWM signal input pin in PWM dimming mode Loop compensation pin Drain of internal MOS AL1672 Document number: DS39344 Rev. 2 - 3 2 of 14 www.diodes.com February 2021 © Diodes Incorporated AL1672 Functional Block Diagram 6 FB APWM 7 DIM VREF Control OVP Valley Detector OTP Logical Control TFP VCC 5 UVLO &Bias VREF S Q D 3,4,9 Driver DRAIN 1 CS -G +m VREF + - 8 COMP AL1672 Block Diagram TFP Temperature OTP Detector 2 GND AL1672 Document number: DS39344 Rev. 2 - 3 3 of 14 www.diodes.com February 2021 © Diodes Incorporated AL1672 Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified.) (Note 4) Symbol VCC VCS VFB VCOMP VDRAIN IDS VAPWM TJ TSTG TLEAD PD θJA θJC - Parameter Power Supply Voltage Voltage at CS to GND FB Input Voltage Loop Compensation Pin Drain Voltage of Internal MOS Continuous Drain Current TC = +25°C Voltage at APWM to GND Operating Junction Temperature Storage Temperature Lead Temperature (Soldering, 10 sec) Power Dissipation at TA=+50°C (Note 5) Thermal Resistance (Junction to Ambient) (Note 5) Thermal Resistance (Junction to Case) (Note 5) ESD (Human Body Model) ESD (Machine Model) Rating -0.3 to 30 -0.3 to 7 -0.3 to 7 -0.3 to 7 600 4 -0.3 to 7 -40 to +150 -65 to +150 +300 1.53 65 22.4 2000 200 Unit V V V V V A V °C °C °C W °C/W °C/W V V Notes: 4. Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability. All voltages unless otherwise stated and measured with respect to GND. 5. Device mounted on 2"x2" FR-4 substrate PCB, 2oz copper, with minimum recommended pad layout. Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.) Note: S.


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