STMicroelectronics STP16CPS05M

Overview

STP16CPS05M 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 6–7 white LEDs in series per channel. It operates from 3.0–5.5 V and interfaces directly with 3.3 V microcontrollers.

For engineers reviewing the STP16CPS05M datasheet, STP16CPS05M pinout, STP16CPS05M application, or STP16CPS05M equivalent, key selection criteria include constant-current accuracy (±1.5% between bits at 20–100 mA), fast output switching (t_ON = 9–10.5 ns @ 5 V), latch-controlled parallel output update, and thermal protection at 170 °C junction temperature.

Technical Context

The STP16CPS05M integrates a 16-bit serial-in/parallel-out shift register cascaded with a 16-bit D-type storage latch, enabling synchronous data loading and simultaneous output update via the LE signal. Its output stage uses sixteen matched current-regulated sinks, each programmable via a single external R_EXT resistor.

Auto power-saving is implemented by monitoring latch activity: when no new data is latched over ~100 ms, the device enters low-quiescent-current mode (<200 µA), then automatically resumes full operation on detection of the next valid LE pulse - requiring no host intervention or control lines.

Key Specifications

Pinout & Package

STP16CPS05M is housed in a SO-24 (Small Outline) package with 24 leads, 300 mil body width, and ECOPACK® RoHS-compliant finish. The exposed pad variant is not used in this order code; thermal resistance R_thJA is 42.7 °C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TB62786FNG, STP16CPS05M eliminates need for external PWM clock and reduces standby power by >99%; compared with AL8863, it provides 16 independent channels with digital addressing - making it appropriate for scalable LED arrays rather than fixed-string lighting.

Availability

STP16CPS05M is available at Aetrix Electronics and suitable for indoor LED video walls, automotive interior lighting, industrial HMI panels, and architectural linear lighting requiring stable component supply and long-term production support.

Supply support for STP16CPS05M 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, mixed-signal, power, and microcontroller solutions for industrial, automotive, and consumer markets.

The STP16CPS05M belongs to ST's LED driver product line, engineered specifically for energy-efficient, high-density LED display systems requiring precise current matching, low-voltage operation, and minimal external components.

FAQ

What is the minimum supply voltage required for reliable operation of STP16CPS05M?

The STP16CPS05M operates reliably down to 3.0 V supply voltage, as specified in its recommended operating conditions. At V_DD = 3.0 V, all timing parameters (e.g., t_wCLK ≥ 8 ns, t_SETUP(D) ≥ 14 ns) and output current accuracy (±5% across units) remain guaranteed. Below 3.0 V, functionality is not assured and may result in latch instability or reduced current regulation.

How does the auto power-saving feature activate and recover?

The auto power-saving feature activates automatically after ~100 ms of inactivity on the LE input - i.e., no high-to-low or low-to-high transitions - reducing supply current to 120–200 µA. Recovery occurs on the first LE rising edge following activation, with full output readiness within 100 ns; no reset or initialization sequence is required.

Can STP16CPS05M drive LEDs with forward voltages exceeding 5 V per string?

Yes - the STP16CPS05M guarantees 20 V output compliance, allowing up to 6–7 standard white LEDs (VF ≈ 3.0–3.4 V each) in series per channel. This eliminates need for higher-voltage supplies in multi-LED string designs and maintains regulation even as LED VF increases with temperature or aging.

Is the R-EXT pin internally biased, and what resistor tolerance is recommended?

The R-EXT pin connects directly to the internal current reference amplifier and requires no external biasing. ST recommends using a 1% tolerance metal-film resistor (e.g., 970 Ω for 20 mA) to maintain ±1.5% typical channel-to-channel current matching. Resistor temperature coefficient should be ≤100 ppm/°C to minimize drift over operating range.