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HT7L4811

AC/DC  8-50W High PF and High Efficiency LED Controller

Non-isolation Buck LED Lighting Driver with Active PFC

 

General Description

The HT7L4811 is a high performance AC/DC non-isolation buck PWM controller for LED lighting applications. The device has a fully integrated active PFC circuit which operates in a boundary conduction mode (BCM) to achieve high power factor values. With good control over external MOSFETs, the device can easily meet exacting LED current and high power factor requirements.

 

The HT7L4811 provides rich protection functions, which include VCC Under Voltage Lockout (UVLO), Over Current Protection (OCP), Output LED String Open Protection, Output LED String Short Protection, VCC Over Voltage Protection (OVP) and Leading-Edge Blanking (LEB) for current sensing.

 

The high level of functional integration minimizes the external component count giving major advantages in terms of cost and circuit board area. The device is supplied in a SOT23-6 package.

 

Features :

  • Wide AC input range – from 85Vac to 265Vac
  • Tiny package SOT23-6
  • Low Start-up Current to reduces power dissipation
  • High PF and Low THD (PF > 0.95, THD < 20%)
  • High Efficiency
  • BCM Mode to reduce the noise
  • Output Current Accuracy on IC Level: ±3%
  • Full protection functions for enhanced safety
    • Gate driver output voltage clamp
    • VCC over voltage protection (VCC OVP)
    • VCC under-voltage lockout with hysteresis (VCC UVLO)
    • Output LED string over current protection
    • Output LED string short protection
    • Output LED string open protection
    • On-chip over temperature protection (OTP)

 

Typical Application Circuits

                                                                                                                                                                                                                       

HT7L4811 Application CircuitsHT7L4811 Application Circuits

 

 

 

 

 

 

 

 

 

 

 

 

 

 T8/18W 12S, 425mA AC-DC LED Tube

 HT7L4811 Application - T8/18W 12S, 425mA AC-DC LED TubeHT7L4811 Application - T8/18W 12S, 425mA AC-DC LED Tube

 

 

 

E27/8W 13S, 162mA LED Bulb

HT7L4811 Application - E27/8W 13S, 162mA LED BulbHT7L4811 Application - E27/8W 13S, 162mA LED Bulb

 

 

 

 

 

 

 

For more information, please contact us by service@kingpex.com.