Texas Instruments TPS92511EVM

Overview

TPS92511EVM from Texas Instruments is an evaluation module designed to validate the TPS92511 constant-current LED driver in floating buck topology, delivering 0.5 A at 38 V LED string voltage with 300 kHz switching frequency and 95% efficiency under 48 V input. It supports PWM dimming at 240 Hz and meets EN 55022 Class B EMI limits.

For engineers reviewing the TPS92511EVM datasheet, TPS92511EVM pinout, TPS92511EVM application, or TPS92511EVM equivalent, this module enables rapid validation of LED driver performance, EMI compliance, line regulation, and dimming behavior in industrial and architectural lighting prototypes.

Technical Context

The TPS92511EVM implements a proprietary Pulse-Level-Modulation (PLM) control method optimized for single-string LED driving, with integrated MOSFET and current-sense resistor eliminating external high-side sensing. Its floating buck architecture isolates the LED string from ground, enabling flexible placement in high-voltage DC systems.

Designed for 43–53 V input range and 38 V/0.5 A output, the EVM includes layout-optimized EMI mitigation components - 10-µH shielded inductor L2, 2.2-µF/100-V ceramic capacitors C4/C5, and 100-Ω ferrite bead R3 - all validated per EN 55022 Class B conducted emissions limits on live and neutral lines.

Key Specifications

Availability

TPS92511EVM is available at Aetrix Electronics and suitable for LED lighting development, power electronics prototyping, and EMI-compliance verification requiring stable component supply and traceable evaluation hardware.

Supply support for TPS92511EVM 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 specializing in analog, embedded processing, and power management technologies, with leadership in precision analog and high-reliability power solutions.

The TPS92511EVM belongs to TI's LED driver evaluation platform family, engineered specifically to accelerate validation of constant-current buck controllers in high-input-voltage, low-EMI lighting applications.

FAQ

What is the primary function of the TPS92511EVM?

The TPS92511EVM is an evaluation module that demonstrates and validates the performance of the TPS92511 constant-current LED driver IC. It implements a floating buck topology with Pulse-Level-Modulation control to drive a single 38 V / 0.5 A LED string from a 48 V input. The TPS92511EVM provides measurable electrical characteristics including efficiency, line regulation, PWM dimming response, and EN 55022 Class B EMI compliance - all documented in its SNOU122 user guide.

Which LED configuration does the TPS92511EVM support out-of-the-box?

The TPS92511EVM is configured to drive exactly one LED string comprising 12 LEDs with a typical forward voltage of 38 V at 0.5 A. This configuration is fixed by the onboard component selection - including the 68 µH inductor L1 and feedback resistors R1/R2 - and matches the TPS92511's internal current-sense amplifier range and gate drive capability. The TPS92511EVM does not support multi-string or parallel LED topologies without hardware modification.

Does the TPS92511EVM include EMI filtering components for regulatory testing?

Yes, the TPS92511EVM includes dedicated EMI filtering components validated for EN 55022 Class B compliance: a 10-µH shielded drum-core inductor (L2), two 2.2-µF/100-V ceramic capacitors (C4, C5), a 1-µF/50-V capacitor (C3), and a 100-Ω ferrite bead (R3). These are specified in Section 4.6 of the SNOU122 user guide and were used to generate Figures 10 and 11 showing peak conducted emissions on live and neutral lines at 48 V input.

Can the TPS92511EVM be used with input voltages outside the 43–53 V range?

No - the TPS92511EVM is strictly rated for 43 V to 53 V input as defined in Table 1 of the SNOU122 user guide. Operation outside this range risks overvoltage stress on C1 (100 V), D1 (100 V Schottky), and the TPS92511DDA IC itself, which has a maximum VIN rating of 55 V. The board lacks input overvoltage protection circuitry, and test data (e.g., line regulation, efficiency) is only characterized within the 43–53 V window. Using the TPS92511EVM outside this range voids TI's 90-day warranty and may cause irreversible damage.

How is PWM dimming implemented on the TPS92511EVM?

PWM dimming on the TPS92511EVM is implemented via the DIM terminal, directly connected to the DIM pin of the TPS92511DDA IC. Applying a 240 Hz PWM signal with variable duty cycle controls LED brightness; pulling DIM to ground disables the internal MOSFET and turns off the LED string; leaving DIM open enables full output. The TPS92511EVM user guide (Figures 5–7) characterizes dimming waveforms for pulse widths from 9 µs to 500 µs, confirming clean turn-on/turn-off transitions without current overshoot.