TX6120

TX6120 is a high-efficiency, high-precision switching buck LED constant-current driver IC with an integrated 100V power MOSFET. It employs a peak current control method with fixed off-time, where the off-time is adjustable via an external capacitor, allowing the operating frequency to be configured per user requirements. By adjusting the external current sense resistor, the IC controls the LED drive current to achieve the desired constant brightness. Applying a PWM signal to the DIM pin enables LED dimming; the DIM pin also supports linear dimming. The IC integrates an internal VDD Zener regulator and over-temperature protection circuit, reducing external component count and improving system reliability. The IC is available in an ESOP8 package, with the exposed thermal pad internally connected to the SW pin.

Applications

• Network systems, medical devices
• Consumer electronics
• Architectural, industrial, and environmental lighting
• Battery-powered LED light strings
• Flat panel display LED backlighting
• LED lighting
• High-power LED lighting

Key features

• Input voltage: 3.6 - 100V
• Integrated 100V power MOS
• Conversion efficiency: up to 93%
• Maximum operating frequency: 1MHz
• Linear and PWM dimming supported
• Adjustable off-time
• Integrated VDD Zener diode
• Integrated over-temperature protection