STMicroelectronics STP16CPC05TTR

Overview

STP16CPC05TTR from STMicroelectronics is a 16-channel constant-current LED sink driver IC with balanced 100 ns rise/fall time, adjustable output current (5–100 mA) via external R_EXT, 30 MHz max clock frequency, and 20 V output voltage capability - deployed in high-density LED panel displays requiring precise brightness control and low-noise switching.

For engineers reviewing the STP16CPC05TTR datasheet, STP16CPC05TTR pinout, STP16CPC05TTR application, or STP16CPC05TTR equivalent, key selection criteria include output current accuracy (±1.5% between bits), thermal resistance (85 °C/W for TSSOP24), serial-in/parallel-out timing margins (t_SETUP = 8 ns), and OE/LE control logic compatibility with 3.3 V microcontrollers.

Technical Context

The device integrates a 16-bit shift register cascaded to a D-type storage latch, enabling synchronized data latching before output activation. Its output stage uses sixteen matched current-regulated sinks with internal current mirror architecture, ensuring ±1.5% channel-to-channel current matching at 5–100 mA.

Control logic features active-low output enable (OE), positive-edge clock (CLK), and latch-enable (LE) with propagation delays under 230 ns (V_DD = 5 V). The SDO pin supports daisy-chaining multiple devices, while R_EXT sets full-scale current per Table 9 (e.g., 200 Ω → 100 mA).

Key Specifications

Pinout & Package

TSSOP24 package (4.3 mm × 7.8 mm, 0.65 mm pitch) with exposed pad recommended for thermal management (R_thJA = 85 °C/W); exposed pad must be soldered to PCB ground plane per DS6083 Section 8.3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC59283RTJR and IS31FL3728-QFLS4-TR, the STP16CPC05TTR delivers superior timing precision for high-refresh-rate displays, simpler analog current setting, and seamless multi-device cascading - making it optimal for cost-sensitive, high-channel-count LED matrix systems where MCU resources are constrained.

Availability

STP16CPC05TTR is available at Aetrix Electronics and suitable for indoor LED video walls, automotive interior lighting, industrial panel meters, and point-of-sale display modules requiring stable component supply and long-term production continuity.

Supply support for STP16CPC05TTR 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 STP16CPC05 belongs to ST's LED driver portfolio targeting high-reliability, low-noise display subsystems - engineered specifically for LED signage, instrumentation, and architectural lighting where consistent brightness and EMI control are critical.

FAQ

What is the minimum R_EXT value supported, and what output current does it produce?

The minimum recommended R_EXT is 200 Ω, producing 100 mA per output channel at V_DD = 5 V and T_A = 25 °C (per Table 9 and Figure 11). Using lower values risks exceeding the 100 mA absolute maximum rating and may degrade current matching accuracy due to increased thermal drift.

Can STP16CPC05TTR drive LEDs directly from a 3.3 V supply without external level shifters?

Yes - the device operates from 3.0 V to 5.5 V and accepts 3.3 V logic levels on SDI, CLK, LE, and OE pins (VIH = 0.7 × VDD min = 2.31 V). No level shifting is needed when interfacing with standard 3.3 V MCUs, simplifying system design and reducing component count.

How does the exposed pad on the TSSOP24 package affect thermal performance?

The exposed pad reduces junction-to-ambient thermal resistance from 85 °C/W (standard TSSOP24) to 37.5 °C/W (exposed pad variant) when soldered to a ≥100 mm² copper pour connected to GND. This allows sustained 100 mA operation across all 16 channels at ambient temperatures up to +85 °C without derating.

Is the SDO pin compatible with standard SPI daisy-chaining topologies?

Yes - SDO outputs the Q16 bit of the internal shift register on the falling edge of CLK, aligning with standard SPI Mode 0 (CPOL = 0, CPHA = 0). When cascading, SDO of one device connects to SDI of the next, enabling single-SPI-port control of N × 16 LED channels with deterministic timing (t_PLH < 26 ns).