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AL3353

HIGH PERFORMANCE BOOST LED CONTROLLER

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Description

The AL3353 is a highly integrated and cost effective Light Emitting Diode (LED) controller optimized for LCD monitor and LCD TV backlighting application. It provides a high performance LED backlight solution with low BOM cost.

The AL3353 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 400mV, the error is amplified to control the pulse width of the power switch thus to regulate the current flowing the LED.

The AL3353 offers PWM to analog dimming mode for a wide range of dimming control.

The AL3353 has comprehensive protection features and it is available in the SO-8 package.

Feature(s)

  • Wide Input Voltage Range: 9V to 40V
  • High Precision Feedback Reference Voltage: 400mV/+-1.5%
  • Current Mode PWM Controller with Good Dynamic Response
  • PWM to Analog Dimming Mode
  • Built-In Comprehensive Protections
    • Undervoltage Lock Out (UVLO)
    • Output Overvoltage Protection (OVP)
    • Power MOSFET Overcurrent Protection (OCP)
    • Diode and Inductor Short Protection
    • LED Cathode Short to GND Protection
    • LED Open Protection
    • VOUT Short Protection
    • Overtemperature Protection (OTP)

Application(s)

  • LCD TV/Monitor backlighting driver
  • Flat panel display
  • Commercial LED lighting

Product Specifications

Product Parameters

AEC Qualified No
Compliance (Only Automotive supports PPAP) Standard
Function Boost LED Driver-Controller
MinimumInput Voltage (V) 9 V
MaximumInput Voltage (V) 40 V
Maximum Output Voltage (V) External MOSFET V
Number of Regulated Output Channels 1
Maximum Output Current per Channel External MOSFET mA
Typical Over-Current Protection Current 500/RCS mA
Switching Frequency (kHz) 0.12 MHz
Efficiency (%) 94 %
Quiescent Current (mA) 2 mA
Standby Quiescent Current (µA) 130 µA
SW RDS(ON) External MOSFET Ω
Dimming PWM to Analog
OVP Yes
Soft Start Yes
VFB 0.4 V
OperatingTemperatureRange  (°C) -40 to 105 °C

Related Content

Packages

Applications

Technical Documents

SPICE Model

Calculators

Evaluation Boards and User Guides

Recommended Soldering Techniques

TN1.pdf

RoHS CofC

Orderable Part Number Buy from Distributor / Contact Sales Request Samples
AL3353S-13

AL3353S-13

Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Digi-Key Electronics 34680 6/27/2022 Europe, Asia, North America Buy Now
Mouser Electronics Inc. 27653 6/27/2022 South America, North America, Asia, Europe, Middle East Buy Now
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FAQs

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