General Description

The HT7L2103 is an advanced, highly integrated LED Lighting Driver using an AC-DC isolation topology. The device provides many protection functions and uses ultra low power circuit design, and is optimized to restrict EMI. By integrating a special multi-function interface, this device can be used for different LED power topologies such as Primary Feedback Isolation Flyback, Secondary Feedback Isolation Flyback, DC-DC Buck/Boost/ BuckBoost. This device also integrates various protection functions for LED Lighting requirements such as Cycle-by-Cycle Current Limiting, Short-Circuit Protection (SCP), Over-Voltage Protection (OVP), Internal Over-Temperature Protection (OTP), and a Soft-Start function to reduce inrush currents during LED power system initialization for the prevention of device burn-out.

The HT7L2103 provides a 1~99 PWM Dimming Range with duty-cycle scale precision lower than 1.

Feature

• Frequency Jitter for EMI Restriction

• Integrated Soft-Start Function

• Very Low Operating Current and Start-up Current (<20mA) for satisfying Energy-Star 2.0 No-Load Mode (Stand-by) Power standard

• ±5 Trimmed Precision Oscillator

• Non-Audible-Noise Green Mode Control to maintain efficiency for both Light and Heavy Loads

• LEB (Leading-Edge Blanking) on CS Pin

• Internal Slope Compensation

• Cycle-by-Cycle Current Limiting

• Short-Circuit-Protection(SCP) for Short-Circuit and Over-Load Condition

• Over-Voltage-Protection(OVP) on VCC Pin

• Internal Over-Temperature-Protection(OTP)

• 1~99 PWM Dimming Range

• 8-pin SOP package

Applications

• Isolation AC-DC LED Lighting

• AC-DC Switching Power Supply/Adapter