Texas Instruments TPS65170 4-CH LCD Bias w/ Regulators for External Charge Pump TPS65170RHDR

The TPS65170RHDR is a 4-channel LCD bias power supply solution designed for various LCD applications, including TVs and monitors. It operates with an input voltage range of 8.6V to 14.7V and features a boost converter capable of outputting voltages up to 18.5V, along with a buck converter that provides a regulated logic supply voltage of 3.3V. The device includes two charge pump controllers for regulating external charge pumps, which generate the on and off supplies for display transistors. Key specifications include a boost converter switch current limit of 2.8A and a buck converter switch current limit of 1.5A. The TPS65170RHDR operates at a fixed switching frequency of 750kHz for both converters and incorporates short-circuit protection, thermal shutdown, and a reset signal generator for monitoring the buck converter output. The device is housed in a compact 28-pin 5x5 mm QFN package, making it suitable for space-constrained designs. Its ability to use external transistors for charge pump regulation helps reduce power dissipation, enhancing thermal management and reliability in PCB designs.