TPS92641

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TPS92640, TPS92641 SNVS902A – OCTOBER 2012 – REVISED OCTOBER 2015 TPS9264x Synchronous Buck Controllers for Precision Dimming LED Drivers 1 Features 1 VIN Range from 7 V to 85 V Wide Dimming Range – 500:1 Analog Dimming – 2500:1 Standard PWM Dimming – 20000:1 Shunt FET PWM Dimming Adjustable LED Current Sense Voltage 2-Ω, 1-Apeak MOSFET Gate Drivers Shunt Dimming MOSFET Gate Driver (TPS92641) Programmable Switching Frequency Precision Voltage Reference 3 V ±2% Input UVLO and Output OVP Low Power Shutdown Mode and Thermal Shutdown 2 Applications LED Driver / Constant Current Regulator Architectural LED Lighting Drivers Automotive LED Drivers General LED Illumination 3 Description The TPS92640 and TPS92641 devices are highvoltage, synchronous NFET controllers for buckcurrent regulators. Output current regulation is based on valley current-mode operation using a controlled on-time architecture. This control method eases the design of loop compensation while maintaining nearly constant switching frequency. The TPS92640 and TPS92641 devices include a high-voltage start-up regulator that operates over a wide input range of 7 V to 85 V. The PWM controller is designed for high speed capability, including an oscillator frequency range up to 1 MHz. The deadtime between high side and low side gate driver is optimized to provide very high efficiency over a wide input opera...