Texas Instruments TPS65170EVM-559

Overview

TPS65170EVM-559 from Texas Instruments is an evaluation module designed to demonstrate and validate the TPS65170 LCD bias power supply IC in real-world display power architectures. It integrates a 2.8 A boost converter (15.6 V output), 1.5 A buck converter (3.3 V output), dual charge pump controllers (26 V positive / –7 V negative), and reset functionality - all configured on a double-sided, two-layer PCB with top-side component placement for accessible probing and thermal observation.

For engineers reviewing the TPS65170EVM-559 datasheet, TPS65170EVM-559 test setup, TPS65170EVM-559 application, or TPS65170EVM-559 equivalent, this board enables rapid validation of LCD panel bias sequencing, charge pump regulation stability, input voltage range compliance (8–14.7 V), and system-level efficiency (up to 93% peak) under load conditions up to 1 A on VS and 50 mA per charge pump rail.

Technical Context

The TPS65170EVM-559 implements the full reference design for the TPS65170 IC, using external compensation (RCOMP = 33 kΩ, CCOMP = 1 nF) optimized for DR74-100-R inductors and Taiyo Yuden ceramic capacitors. It supports fixed 750-kHz switching frequency across both buck and boost converters, with programmable soft-start on the boost stage and fixed soft-start on the buck stage.

Board-level features include dedicated input (J1/J3), boost output (J4/J6), logic supply (J7/J9), VGH (J10/J11), and VGL (J12/J13) connectors - each isolated for independent load testing. The EVM also provides unpopulated sense headers (J2, J5) for 4-wire voltage measurement and COMP pin access for loop stability tuning.

Key Specifications

Availability

TPS65170EVM-559 is available at Aetrix Electronics and suitable for LCD television development, industrial monitor prototyping, and embedded display power architecture validation requiring stable component supply, documented reference design fidelity, and TI-validated performance data.

Supply support for TPS65170EVM-559 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and consumer applications since 1930.

The TPS65170EVM-559 belongs to TI's LCD Power Management Evaluation Module family, engineered specifically to accelerate design-in of multi-rail display bias supplies by providing fully assembled, tested, and characterized hardware aligned with the TPS65170 IC's functional and thermal specifications.

FAQ

What is the primary purpose of the TPS65170EVM-559?

The TPS65170EVM-559 is an evaluation module built to demonstrate and validate the TPS65170 LCD bias power supply IC. It delivers four regulated outputs - 15.6 V boost (VS), 3.3 V buck (VLOGIC), +26 V positive charge pump (VGH), and –7 V negative charge pump (VGL) - enabling engineers to verify sequencing, stability, and efficiency before integrating into final LCD panel designs. The TPS65170EVM-559 uses TI's reference layout and component selection for reliable benchmarking.

Does the TPS65170EVM-559 support adjustable output voltages?

Yes, the TPS65170EVM-559 supports adjustment of the boost converter and charge pump output voltages via feedback resistor divider networks. The default configuration yields 15.6 V on VS, 26 V on VGH, and –7 V on VGL, but changing R1/R10 (VS divider) or R13/R14 (VGH divider) allows fine-tuning to match specific panel requirements. The TPS65170EVM-559 schematic and bill of materials document these configurable nodes explicitly.

Can the TPS65170EVM-559 be used with input voltages outside the 8–14.7 V range?

No - the TPS65170EVM-559 is rated for 8 V to 14.7 V input only. Exceeding this range risks unexpected behavior or irreversible damage, as confirmed in the EVM User's Guide warnings. The absolute maximum input is 20 V, but operation beyond 14.7 V voids performance guarantees and may compromise internal protection circuits. Always verify input voltage with a calibrated source before connecting to the TPS65170EVM-559.

How is thermal performance managed on the TPS65170EVM-559?

The TPS65170EVM-559 uses a double-sided, two-layer PCB with all active components placed on the top side to facilitate thermal observation and airflow. Certain components - including the boost switch MOSFET and charge pump drivers - may exceed 85°C during normal operation, with some reaching >125°C. The TPS65170EVM-559 layout avoids thermal vias or buried layers to maintain visibility, and its 1 oz copper construction ensures predictable heat spreading without hidden hotspots.

Is the TPS65170EVM-559 compliant with RoHS, CE, or FCC standards?

No - the TPS65170EVM-559 is explicitly designated for engineering development, demonstration, or evaluation only and is not certified for end-product compliance. As stated in the TI Important Notice, it falls outside the scope of EU directives (RoHS, WEEE, CE), FCC Part 15, UL, or EMC requirements. Users must integrate the TPS65170 IC into their own certified systems; the TPS65170EVM-559 itself is not intended for final product deployment.