Texas Instruments LP5523EVM/NOPB

Overview

LP5523EVM/NOPB from Texas Instruments is an evaluation kit for the LP5523 9-channel RGB/white LED driver IC, enabling hardware validation, firmware development, and lighting sequence prototyping via USB-connected Windows software. It supports independent per-channel current control (up to 25 mA), programmable PWM dimming, three independent execution engines, and on-board temperature/light sensor interfaces.

For engineers reviewing the LP5523EVM/NOPB datasheet, LP5523EVM/NOPB pinout, LP5523EVM/NOPB application, or LP5523EVM/NOPB equivalent, this kit delivers hands-on access to real-time register-level control, engine-based LED sequencing, charge pump gain auto-selection, logarithmic PWM response, and integrated LED fault detection - critical for mobile UI, keypad backlighting, and ambient lighting system design.

Technical Context

The LP5523EVM/NOPB implements a full hardware-software evaluation platform centered on the LP5523 IC, featuring an FT232R USB-to-UART bridge for virtual COM port communication, onboard 3.3 V LDO regulation from USB 5 V, and configurable jumper-based routing for RGB vs. WLED output mapping across three LED banks. It integrates physical test points, reset button (S1), and status LEDs (D14) for debug visibility.

Hardware configuration is managed via 14 jumpers (J1–J14) enabling selection of power source (USB or external), VDDIO sourcing, LED type (RGB or white), light sensor interface (INT/GPO), and channel-to-LED assignment (e.g., J10 maps outputs 1/2/7 to D1 green/blue/red). The board supports both manual register control and compiled assembly (.hex) program loading into the LP5523's 96-instruction SRAM.

Key Specifications

Availability

LP5523EVM/NOPB is available at Aetrix Electronics and suitable for LED lighting development, embedded UI prototyping, and automotive interior lighting validation requiring stable component supply and full toolchain integration.

Supply support for LP5523EVM/NOPB 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 digital signal technologies, with leadership in power management and lighting control solutions.

The LP5523EVM/NOPB belongs to TI's LED driver evaluation platform family, designed specifically to accelerate development of dynamic, low-power, color-accurate lighting systems using programmable engine-based sequencing and thermal compensation.

FAQ

What is the LP5523EVM/NOPB used for?

The LP5523EVM/NOPB is a dedicated evaluation kit for the LP5523 LED driver IC. It enables engineers to validate hardware configurations, develop lighting sequences using assembly-level programming, test temperature and light sensor integration, and verify real-time register control - all through a Windows-based GUI (LP5523.exe) and compiler toolchain (LASM.exe). It is not a production component but a development accelerator for lighting subsystems.

Does the LP5523EVM/NOPB require external power or run solely from USB?

The LP5523EVM/NOPB operates from USB 5 V by default, with onboard regulation to 3.3 V for VDDIO. External power can be applied via X3 (VDDIO) or X4 (VDD) connectors, and jumper J1/J2 selects the source. USB supplies up to 500 mA, sufficient for full 9-channel operation at typical currents (e.g., 5–25 mA per channel), making external power optional unless higher total load or specific voltage requirements exist.

How are LED outputs configured on the LP5523EVM/NOPB?

LED outputs on the LP5523EVM/NOPB are configured via three 3-pin jumpers: J10, J11, and J12. Each selects whether a bank of three LP5523 outputs drives RGB LEDs (e.g., J10 connects outputs 1/2/7 to D1 green/blue/red) or white LEDs (e.g., outputs 1/2/3 to D4/D5/D6). Mixing RGB and white LEDs on the same board is not recommended due to differing forward voltage and thermal behavior.

Can the LP5523EVM/NOPB interface with ambient light sensors?

Yes - the LP5523EVM/NOPB includes an on-board ambient light sensor with configurable interface via jumpers J13 and J14. J14 routes the sensor output to the LP5523's INT pin for interrupt-driven sensing, while J13 connects the sensor's GC1 pin to the LP5523's GPO pin, allowing software-controlled standby mode activation. This enables closed-loop adaptive brightness control during development.

What software tools are required to use the LP5523EVM/NOPB?

The LP5523EVM/NOPB requires LP5523.exe (GUI control panel), LASM.exe (assembler), and PSPad editor (with Lysti.ini syntax highlighting). FTDI VCP drivers must also be installed for USB-to-COM communication. All tools run natively on Windows 2000/XP/Vista without installation; source files (*.scr), hex files (*.hex), and supporting DLLs (usblptio.dll) must reside in the same directory as LP5523.exe and LASM.exe.