Texas Instruments LP5526TLEV

Overview

LP5526TLEV from Texas Instruments is an evaluation kit for the LP5526 Lighting Management Unit (LMU), designed to drive display backlight, keypad LEDs, RGB color LEDs, and high-current flash LEDs in portable electronics. It integrates a 20-V boost converter, dual high-resolution current-mode WLED drivers (MAIN/SUB), and three-channel RGB/flash drivers with I²C control, supporting external PWM dimming via GPIO[0]. The kit enables full functional validation of flash timing safety, fade control, and multi-mode LED driving.

For engineers reviewing the LP5526TLEV datasheet, LP5526TLEV pinout, LP5526TLEV application, or LP5526TLEV equivalent, this kit provides hands-on verification of boost converter regulation, RGB current sink vs. switch-mode operation, safety timeout behavior, fade execution time tuning, and I²C register-level control of LED enable states, brightness, and flash triggering sequences.

Technical Context

The LP5526TLEV implements a modular hardware architecture: the LP5526 evaluation board plugs directly onto a USB interface board that converts PC commands to I²C and supplies regulated 3.3V VDDIO and 5V VBATT. The system supports real-time voltage monitoring (VDDIO, VBOOST) and full register read/write via software with history logging.

Its evaluation software features tabbed control (Common, Boost, Color LEDs, GPIO, Backlight, History) synchronized with the LP5526's register map, enabling direct manipulation of safety_set bit, en_pwm_pin configuration, RGB maximum current limits (21 mA or 50 mA per channel), fade execution time, and external PWM duty cycle-all confirmed by on-board test points and jumper-configurable current limiting resistors (R23/R27).

Key Specifications

Availability

LP5526TLEV is available at Aetrix Electronics and suitable for portable lighting design validation, flash LED safety testing, RGB color mixing prototyping, and backlight fade algorithm development requiring stable component supply and traceable evaluation hardware.

Supply support for LP5526TLEV 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 decades of leadership in LED driver and lighting management solutions.

The LP5526 product line targets portable lighting systems requiring integrated boost conversion, multi-channel LED control, and programmable safety features - specifically optimized for smartphones, tablets, and handheld devices with RGB indicators and camera flash.

FAQ

What is the LP5526TLEV used for?

The LP5526TLEV is an evaluation kit for the LP5526 Lighting Management Unit. It enables engineers to validate the full functionality of the LP5526 IC-including its 20-V boost converter, MAIN/SUB WLED drivers, RGB/flash outputs, I²C register control, safety timeout behavior, and external PWM dimming-using included hardware, USB interface board, and PC-based evaluation software.

Does the LP5526TLEV include the LP5526 IC?

Yes, the LP5526TLEV evaluation kit includes a populated LP5526 IC on the evaluation board in its native DSBGA-25 package. The board also features all necessary external components: boost inductor (10 µH), Schottky diodes (BAT760), input/output capacitors, current-limiting resistors (R23, R27), and test points aligned to LP5526 pin functions.

Can the LP5526TLEV be used to test flash LED safety features?

Yes, the LP5526TLEV fully supports flash LED safety validation. The evaluation software monitors the 'safety_set' bit, which activates automatically after 1-second flash timeout. Users can trigger pre-flash/torch mode, initiate flash pulses via the 'Flash' button, and verify safety reset behavior - all confirmed through real-time register reads and GPIO[0] state control in the GPIO tab.

How does external PWM dimming work on the LP5526TLEV?

External PWM dimming on the LP5526TLEV uses GPIO[0] as an input pin (enabled via 'en_pwm_pin' bit). The evaluation software generates adjustable-duty-cycle PWM signals applied to GPIO[0], which reduce brightness set by internal controls. This function requires enabling en_main_pwm, en_sub_pwm, or en_ext_X_pwm bits per output and works only when corresponding outputs are active in current-sink or switch mode.

Is USB power sufficient for full LP5526TLEV operation?

No - USB power alone is insufficient for full LP5526TLEV operation under high load. While the USB interface board supplies 3.3V VDDIO and 5V VBATT, the LP5526 boost converter cannot deliver its full 150 mA flash current from USB due to current limitations. External 3.6V VBATT (≥1.5A) is required for flash testing; jumpers J17 (VBATT), J19 (VDD), and J21 (VDDIO) must be configured accordingly per the user guide.