TPS92692QPWPRQ1 Description

The TPS92692 and TPS92692-Q1 are peak current model-based controllers that allow step-up/down LED driver topologies with great precision. The TPS92692QPWPRQ1 has a rail-to-rail current amplifier for measuring LED current as well as a spread spectrum frequency modulation approach for better EMI performance.

This high-performance LED controller can dim LED current utilizing analog or PWM dimming techniques independently. Varying the voltage across the high impedance analog adjust (IADJ) input produces a linear analog dimming response with a range of over 15:1. PWM dimming of LED current can be accomplished by either directly modulating the DIM/PWM input pin with the required duty cycle or by turning on the internal PWM generator circuit. By comparing the DC voltage at the DIM/PWM pin to the internal triangle wave generator, the PWM generator converts it to the corresponding duty cycle. An external P-Channel series MOSFET can be driven using the optional PDRV gate driver output.

TPS92692QPWPRQ1 Features

• Wide Input Voltage: 4.5 V to 65 V

• Better than ± 4% LED Current Accuracy over –40°C to 150°C Junction Temperature Range

• Spread Spectrum Frequency Modulation for Improved EMI

• Comprehensive Fault Protection Circuitry with Current Monitor output and Open Drain Fault Flag Indicator

• Internal Analog Voltage to PWM Duty Cycle Generator for stand-alone Dimming Operation

• Compatible with Direct PWM Input with over 1000:1 Dimming Range

• Analog LED Current Adjust Input (IADJ) with over 15:1 Contrast Ratio

• Integrated P-Channel Driver to enable Series FET Dimming and LED Protection

TPS92692QPWPRQ1 Applications

• TPS92692-Q1: Automotive Exterior Lighting Applications

• Driver Monitoring Systems (DMS)

• LED General Lighting Applications

• Exit Signs and Emergency Lighting