STMicroelectronics STP1612PW05MTR

Overview

STP1612PW05MTR from STMicroelectronics is a 16-channel constant-current sink LED driver with 16-bit PWM grayscale control, 8-bit global current gain (256-step), open/short LED fault detection, and 20 V output voltage capability. It operates from 3.3 V or 5 V supply, supports up to 30 MHz serial clock, and delivers per-channel current from 3 mA to 60 mA via single R_EXT. Used in high-fidelity RGB backlighting and video display panels requiring flicker-free imaging.

For engineers reviewing the STP1612PW05MTR datasheet, STP1612PW05MTR pinout, STP1612PW05MTR application, or STP1612PW05MTR equivalent, this device enables precise per-channel brightness control, thermal-safe operation with overtemperature flag, and real-time LED health monitoring via SPI-readable error status-critical for large-area LED signage and automotive interior lighting systems.

Technical Context

The STP1612PW05MTR implements dual-mode PWM counters (12-bit or 16-bit) with enhanced e-PWM algorithm to dither MSB cycles across refresh frames, reducing ghosting artifacts without sacrificing grayscale resolution. Its 16-bit configuration register controls shift register length, PWM mode, synchronization behavior, thermal shutdown enable, and current gain scaling.

It integrates a 16-bit dual-size shift register (configurable as 16-bit or 256-bit), supports cascaded operation, and performs simultaneous open/short LED detection during active drive-requiring all outputs ON and completing diagnosis in ≤1 µs. Fault status is reported bit-wise on SDO after "Read Error Status Code" command.

Key Specifications

Pinout & Package

STP1612PW05MTR is packaged in SO-24 (small outline, 24-pin) with standard 0.635 mm pitch and exposed pad not present-distinct from TSSOP24-exposed-pad variants. Pin functions are electrically validated per ST's official datasheet Rev 5.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-channel constant-current LED driver applications.

Compared with TLC5947 and IS31FL3731, STP1612PW05MTR uniquely combines 16-bit grayscale, hardware-based LED fault detection, and R_EXT-programmable current in SO-24-making it optimal for high-reliability display backlighting where real-time diagnostics and flicker suppression are mandatory.

Availability

STP1612PW05MTR is available at Aetrix Electronics and suitable for RGB LCD backlighting, large-area video signage, and automotive interior lighting requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for STP1612PW05MTR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and analog/mixed-signal products for industrial, automotive, and consumer markets.

The STP1612PW05 belongs to ST's high-performance LED driver product line, engineered specifically for demanding display and lighting applications requiring precision grayscale, robust fault handling, and thermal resilience in compact packages.

FAQ

What is the maximum number of STP1612PW05MTR devices that can be cascaded?

Up to 16 devices can be cascaded using the SDI-to-SDO daisy-chain topology. Each device shifts its 256-bit data frame (16 channels × 16 bits) into the next; total frame length scales linearly. Clock frequency must be derated per cascade depth to meet t_PD0 (40 ns max) and setup/hold timing margins-30 MHz is guaranteed for single-device operation.

Does STP1612PW05MTR support both 3.3 V and 5 V logic levels on its control pins?

Yes-input pins SDI, CLK, LE, and PWCLK accept VIH ≥ 0.7 × VDD and VIL ≤ 0.3 × VDD, making them fully compatible with both 3.3 V and 5 V microcontroller I/O. The internal Schmitt triggers provide noise immunity, and all timing parameters (e.g., t_SU0, t_H0) are specified across −40 °C to +125 °C at both supply voltages.

How does the e-PWM algorithm reduce ghosting in video displays?

e-PWM splits the grayscale value into MSB and LSB portions, then distributes MSB transitions across multiple refresh cycles instead of concentrating them in one frame. This spreads electromagnetic energy and eliminates localized brightness artifacts-verified in ST's application note AN3292 for video panels operating at 120 Hz refresh rates.

Can STP1612PW05MTR drive LEDs with forward voltages exceeding 5 V?

Yes-the device guarantees 20 V output voltage capability per channel, allowing series connection of up to six standard white LEDs (3.2 V each) or eight red LEDs (2.2 V each) at 5 V supply. Output compliance is maintained as long as V_LED ≤ 20 V and total power dissipation stays within thermal limits defined by R_thJA = 42.7 °C/W for SO-24.