STMicroelectronics STP16CPPS05MTR

Overview

STP16CPPS05MTR from STMicroelectronics is a 16-channel constant-current LED sink driver IC designed for serially controlled LED panel displays. It integrates a 16-bit shift register, latch, and sixteen regulated current sources delivering 3–40 mA per channel with ±1% inter-channel accuracy at 5 mA. Features include auto power-saving (190–240 µA shutdown current), 30 MHz clock support, 20 V output voltage capability, and 3.3 V MCU compatibility - deployed in indoor signage and architectural lighting systems.

For engineers reviewing the STP16CPPS05MTR datasheet, STP16CPPS05MTR pinout, STP16CPPS05MTR application, or STP16CPPS05MTR equivalent, key selection criteria include adjustable current via R-EXT (497 Ω → 40 mA), TSSOP24 exposed pad thermal performance (R_thJA = 37.5 °C/W), OE-controlled 0–100% brightness dimming, and cascade-compatible serial-in/parallel-out architecture.

Technical Context

The device implements a two-stage digital pipeline: a 16-bit serial-in, parallel-out shift register feeds a 16-bit D-type storage latch, enabling asynchronous data loading and output updating. Output enable (OE) is level-sensitive and independent of clock edges, allowing precise timing control of LED turn-on/off transitions (t_ON = 29 ns @ 3.3 V).

Current regulation uses an external R-EXT resistor to set I_SET, with internal circuitry maintaining ±0.5% typical inter-channel matching across 3–40 mA and ±2% unit-to-unit variation. Thermal protection activates at 170 °C junction temperature, and the exposed pad package reduces thermal resistance by 32% versus standard TSSOP24.

Key Specifications

Pinout & Package

STP16CPPS05MTR is packaged in a thermally enhanced TSSOP24 with exposed pad (JEDEC MO-153 variant), requiring PCB land connection to ground or thermal plane for optimal heat dissipation (R_thJA = 37.5 °C/W). The exposed pad must be soldered directly to maximize thermal benefits.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LED sink driver applications.

Compared with TLC59283DBQR and IS31FL3728-QFLS4-TR, STP16CPPS05MTR uniquely balances high-speed serial control, analog current tuning, autonomous power management, and industrial-grade thermal robustness - making it optimal for cost-sensitive, high-reliability LED display subsystems where MCU resources and board area are constrained.

Availability

STP16CPPS05MTR is available at Aetrix Electronics and suitable for indoor LED video walls, architectural accent lighting, transportation signage, and industrial HMI panels requiring stable component supply across extended production lifecycles.

Supply support for STP16CPPS05MTR 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 management ICs, sensors, and analog products for industrial, automotive, and consumer markets.

The STP16CPPS05 belongs to ST's LED controller product line, engineered specifically for energy-efficient, high-density LED display systems requiring precise current regulation, thermal resilience, and seamless integration with 3.3 V microcontrollers.

FAQ

What is the minimum R-EXT value supported, and what current does it set?

The minimum recommended R-EXT is 331 Ω, which sets the output current to 60 mA per channel at 25 °C. However, the absolute maximum rated output current is 50 mA per channel (Table 3), so operation above 50 mA violates absolute maximum ratings and risks reliability degradation. For safe 40 mA operation, use 497 Ω (Table 10).

How does the auto power-saving feature detect "no active data"?

The device monitors the latch state continuously. When all 16 output bits remain static (no change detected across consecutive LE assertions) and OE is low, it enters shutdown after a brief delay. First valid data transition on SDI/LE triggers immediate wake-up and resumption of normal current delivery - no external signal or reset required.

Can STP16CPPS05MTR drive common-anode LED configurations?

No - STP16CPPS05MTR is a sink-only driver with N-channel output transistors. It connects to LED cathodes and requires external anode voltage (up to 20 V). For common-anode designs, a high-side switch or P-channel driver stage must be added externally; the IC itself cannot source current.

Is the exposed pad electrically isolated or must it be grounded?

The exposed pad is internally connected to GND (Pin 1) and must be soldered to a PCB copper land tied to the system ground plane. Leaving it floating degrades thermal performance and may cause instability; connecting it to a non-ground potential violates the internal electrical connection and risks damage.