AL8853S-13

AL8853 HIGH PERFORMANCE BOOST LED CONTROLLER Description Pin Assignments NEW PRODUCT The AL8853 is a highly integrated and cost effective Light Emitting Diode (LED) controller. It provides a high performance LED backlight solution with low BOM cost. (Top View) The AL8853 contains a PWM boost driver which uses current mode control and fixed frequency operation to regulate the LED current. The LED current is sensed through an external current sense resistor. The voltage across the sensing resistor is compared with reference level of 200mV, the error is amplified to control the pulse width of the power switch thus to regulate the current flowing the LED. VIN 1 8 PWM GATE 2 7 OVP GND 3 6 COMP CS 4 5 FB The AL8853 offers PWM to analog dimming mode for a wide range of dimming control. The AL8853 has comprehensive protection features such as power MOSFET Over Current Protection (OCP), Output Over Voltage Protection (OVP), Diode & Inductor short protection, LED cathode short to GND protection, IC power supply Under Voltage Lockout (UVLO), LED open protection, VOUT short protection and Over Temperature Protection (OTP). SO-8 (Type TH2) Applications     LCD TV LCD Monitor Flat Panel Display Constant Output Voltage Driver The AL8853 is available in the SO-8 (Type TH2) package. Features   Wide Input Voltage Range: 6.0V to 40V High Precision Feedback Reference Voltage: 200mV/±3%    Current Mode PWM Controller with Good Dynamic Response PWM to Analog Dimming Mode Built-In Comprehensive Protections  Under Voltage Lock Out (UVLO)  Output Over Voltage Protection (OVP)  Power MOSFET Over Current Protection (OCP)  Diode and Inductor Short Protection  LED Cathode Short to GND Protection  LED Open Protection  VOUT Short Protection     Over Temperature Protection (OTP) Available in Pb-Free SO-8 (Type TH2) Package 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 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