STMicroelectronics STP16DPPS05XTTR

Overview

STP16DPPS05XTTR from STMicroelectronics is a 16-bit constant-current LED sink driver with integrated open/short error detection, auto power-saving, and 3.3 V MCU compatibility. It delivers 3–40 mA per channel across 16 outputs, supports 30 MHz serial data rates, and operates from 3.0–5.5 V supply. Used in LED panel displays requiring precise current regulation and fault monitoring.

For engineers reviewing the STP16DPPS05XTTR datasheet, STP16DPPS05XTTR pinout, STP16DPPS05XTTR application, or STP16DPPS05XTTR equivalent, key selection criteria include output current accuracy (±1% between bits), thermal resistance (37.5 °C/W with exposed pad), error detection logic timing, and OE/DM2 dual-function behavior for brightness control and mode switching.

Technical Context

The device integrates a 16-bit serial-in/parallel-out shift register feeding a D-type storage latch, driving sixteen matched current sources. Output current is set externally via R-EXT (497 Ω to 23.7 kΩ) and remains stable across 1.3–20 V output voltage range. Detection logic uses OE/DM2 and LE/DM1 pins in a 5-cycle sequence to enter error mode without additional pins.

Error detection evaluates three conditions per output: short-to-GND, short-to-VO, or open line-using current threshold (IODEC ≤ 0.5 × IO) and voltage threshold (VO ≥ 2.6 V). Auto power-saving reduces IDD from 7.5 mA to 170 μA when latches hold no active data, resuming within one clock cycle upon new data arrival.

Key Specifications

Pinout & Package

TSSOP24 package with thermally enhanced exposed pad (EP), requiring direct soldering to PCB copper for optimal thermal performance. Pad must be electrically isolated or connected to GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC59283RTQR and MAX7219CWG+, the STP16DPPS05XTTR uniquely combines 16-channel precision current regulation, embedded error detection, and thermal-enhanced packaging-making it optimal for mission-critical LED systems where fault visibility and thermal reliability are non-negotiable.

Availability

STP16DPPS05XTTR is available at Aetrix Electronics and suitable for indoor LED video walls, automotive interior lighting panels, industrial HMI displays, and architectural LED signage requiring stable component supply and long-term manufacturability.

Supply support for STP16DPPS05XTTR 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 STP16DPPS05 belongs to ST's LED driver product line, engineered specifically for high-reliability, thermally constrained LED panel applications requiring integrated diagnostics and energy-efficient operation.

FAQ

What is the minimum R-EXT value for 40 mA output current?

The datasheet specifies 497 Ω as the R-EXT value yielding 40 mA output current at 25 °C. This resistor must be placed between Pin 23 (R-EXT) and GND. Lower resistance values risk exceeding the 50 mA absolute maximum output current rating and may compromise current accuracy or thermal safety.

How does the auto power-saving mode activate and deactivate?

Auto power-saving activates automatically when all 16 output latches contain zero (OFF) data for ≥100 ms, reducing IDD to 170 μA. It deactivates on the first rising edge of CLK that shifts in a '1' bit, restoring full operation within one clock cycle-no software command or pin toggle is required.

Can STP16DPPS05XTTR drive LEDs with forward voltages above 5 V?

Yes-the device supports up to 20 V output voltage per channel, enabling series strings of 5–6 standard white LEDs (VF ≈ 3.3 V each) or 8–10 red LEDs (VF ≈ 2.0 V each). The 20 V rating applies regardless of VDD, provided VO does not exceed 20 V relative to GND.

Is the exposed pad on the TSSOP24 package electrically connected internally?

No-the exposed pad is not internally connected to any die node. It must be externally soldered to a PCB copper area, which may be left floating or tied to GND for improved thermal performance and EMI reduction. Electrical isolation from internal circuits is confirmed in the mechanical drawings and thermal data tables.