AL1673
UNIVERSAL FLYBACK AND BUCK-BOOST
SINGLE STAGE DIMMABLE LED DRIVER Description Pin Assignments The AL1673 is a high performance single stage Flyback/Buck-Boost
(Top View) converter, targeting dimmable LED lighting application. It is operating
at BCM mode which results in good EMI and efficiency.
The AL1673 can support multiple dimming modes. When a 0.3~2.4V NEW PRODUCT 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 AL1673 features low start-up current and low operation current. It 8 COMP 7 APWM 3 6 FB DRAIN 4 5 VCC CS 1 GND 2 DRAIN EP integrates multiple protections including over voltage, short circuit,
over current and over temperature protection. It also integrates SO-8EP 600V/2A high voltage MOSFET.
The AL1673 is available in SO-8EP package. Applications
п‚ п‚ п‚ Features
п‚ п‚ п‚ п‚ п‚ п‚ п‚ п‚ п‚ п‚ п‚ 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/2A 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) …