STMicroelectronics STP16CPS05MTR

Overview

STP16CPS05MTR from STMicroelectronics is a 16-bit constant-current LED sink driver IC designed for serially controlled LED panel displays. It features 16 regulated current outputs (5–100 mA), auto power-saving mode (120–200 µA shutdown current), 30 MHz max clock frequency, and 20 V output voltage capability - enabling up to 6 white LEDs in series per channel at 3.3 V supply.

For engineers reviewing the STP16CPS05MTR datasheet, STP16CPS05MTR pinout, STP16CPS05MTR application, or STP16CPS05MTR equivalent, key selection criteria include output current accuracy (±1.5% between bits), thermal resistance (42.7 °C/W for SO-24), latch timing (15 ns setup), OE-controlled blanking, and R_EXT-based current programming across wide V_DD range (3.0–5.5 V).

Technical Context

The STP16CPS05MTR integrates a 16-bit serial-in/parallel-out shift register cascaded with a 16-bit D-type storage latch, enabling synchronous data loading and output latching. Its output stage uses sixteen matched current-regulated sinks with programmable reference via external R_EXT, supporting ±1.5% inter-channel current matching at 20–100 mA.

Auto power management operates autonomously: device enters low-quiescent-current shutdown (<200 µA) when no new data is latched, and wakes within one clock cycle upon detection of active LE transitions. Output rise/fall times are 9–31.5 ns (V_DD = 5 V / 3.3 V), and propagation delays (CLK→OUT, LE→OUT, OE→OUT) are fully characterized down to 6.5 ns (t_PHL2, V_DD = 5 V).

Key Specifications

Pinout & Package

STP16CPS05MTR is packaged in SO-24 (Small Outline, 24-pin), with exposed pad optional per variant - this specific part uses standard SO-24 with GND-connected leadframe for thermal conduction (R_thJA = 42.7 °C/W). Pin 1 is marked by notch or dot; Pin 24 is V_DD; Pin 12 is center ground tie.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC59283RTJR and MAX7219CWG+, the STP16CPS05MTR uniquely combines wide output voltage headroom (20 V), ultra-low shutdown current (120 µA), and single-resistor scalability across 5–100 mA - making it optimal for high-reliability, thermally constrained, or variable-VF LED systems.

Availability

STP16CPS05MTR is available at Aetrix Electronics and suitable for LED video walls, industrial HMIs, architectural lighting controls, and medical device indicators requiring stable component supply, long-lifecycle support, and RoHS-compliant SO-24 packaging.

Supply support for STP16CPS05MTR 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 analog, MCU, power, and sensor solutions for automotive, industrial, and consumer markets.

The STP16CPS05 belongs to ST's LED driver portfolio targeting energy-efficient, high-precision display illumination - engineered for robustness in extended-temperature industrial environments and compatibility with mainstream 3.3 V controller ecosystems.

FAQ

What is the minimum recommended R_EXT value and corresponding maximum output current?

The datasheet specifies R_EXT = 190 Ω yields I_OUT = 96–104 mA (typ. 100 mA) at V_DD = 5 V and T = 25 °C. Using lower resistance risks exceeding absolute max output current (100 mA) and thermal limits - 190 Ω is the practical minimum for full-scale operation with margin.

Does STP16CPS05MTR support PWM dimming, and how is it implemented?

Yes - PWM dimming is implemented externally by toggling the OE (output enable) pin. When OE is high, all outputs turn OFF instantly (t_PHL3 ≤ 10.5 ns @ 5 V); when OE is low, outputs follow latch data. This enables precise, flicker-free dimming independent of serial data rate, with no current-source modulation artifacts.

Can STP16CPS05MTR drive LEDs with forward voltage above 5 V per string?

Yes - its 20 V output compliance voltage allows driving LED strings totaling up to ~20 V forward drop. For example, six 3.3 V white LEDs (19.8 V total) operate reliably at 20 mA with R_EXT = 970 Ω, provided V_DD ≥ 20.5 V (including dropout). Note: V_DD itself is limited to 7 V max; external boost or buck-boost supply is needed for high-VF strings.

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

The internal state machine monitors LE (latch enable) transitions. If no rising edge on LE occurs for >100 µs (guaranteed by timing analysis), the device enters shutdown mode - disabling internal clocks and bias circuits. It exits shutdown on the next LE rising edge, with first output ON delay ≤ 200 ns (Figure 16), ensuring glitch-free wake-up.