Diodes Incorporated
SO 8

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Medium Voltage DC-DC LED Driver

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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.


  • 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)


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

Product Specifications

Product Parameters

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

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