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Description

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.


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.


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).


The AL8853 is available in the SO-8 (Type TH2) package.

Application

  • LCD TV
  • LCD Monitor
  • Flat Panel Display
  • Constant Output Voltage Driver

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)

Product Specifications

Product Parameters

Qualified to AECQ10x No
Automotive Compliant PPAP No
Topologies (Buck) No
Topologies (Buck-Boost) No
Topologies (Boost) Yes
Minimum Input Voltage 6 V
Maximum Input Voltage 40 V
Maximum Output Voltage Ext MOSFET V
Maximum LED Current Ext MOSFET A
LED Current Accuracy 5 %
Switching Frequency Maximum 1000 kHz
Dimming (PWM) Yes
Dimming (Analog) No
Efficiency >90 %
Operating Temperature Range -40 to 125 °C
Sense Voltage 200 mV
AEC-Q100 Grade N/A

Technical Documents

SPICE Model

Calculators

Recommended Soldering Techniques

RoHS CofC

Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Region
AL8853S-13 Mouser Electronics Inc. 3995 12/15/2019 Buy Now United States

FAQs

Related Application FAQs