STMicroelectronics STP16DP05XTTR

Overview

STP16DP05XTTR from STMicroelectronics is a low-voltage 16-bit constant-current LED sink driver with integrated open/short output error detection, serial-in/parallel-out shift register architecture, and adjustable output current (5–100 mA) via external resistor. It operates from 3.0 V to 5.5 V, supports 30 MHz clock frequency, and delivers 20 V output driving capability for multi-LED series strings in outdoor signage and industrial panel displays.

For engineers reviewing the STP16DP05XTTR datasheet, STP16DP05XTTR pinout, STP16DP05XTTR application, or STP16DP05XTTR equivalent, key selection criteria include its TSSOP24 exposed-pad thermal performance (R_thJA = 37.5 °C/W), dual-mode DM1/DM2 detection control logic, ±1.5% inter-channel current accuracy at 25 °C, and compatibility with 3.3 V microcontrollers without level-shifting.

Technical Context

The STP16DP05XTTR integrates a 16-bit shift register feeding a 16-bit D-type storage latch, with sixteen matched current-regulated sinks. Its detection mode uses time-multiplexed logic on OE/DM2 and LE/DM1 pins-no extra pins required-to identify open, short-to-GND, or short-to-V_O faults per channel within ≥1 µs.

Current programming relies on R_EXT (970 Ω to 3.9 kΩ) to set full-scale output between 20 mA and 5 mA; brightness dimming is achieved via PWM on OE/DM2 (active-low). The device guarantees 20 V output compliance and includes thermal shutdown at 170 °C (design-guaranteed, not tested).

Key Specifications

Pinout & Package

TSSOP24 exposed pad package (8.4 mm × 4.4 mm × 1.05 mm), with thermally enhanced copper land under die paddle requiring PCB solder connection to ground or isolated plane for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC59283RTJR and MAX6966ATL+T, the STP16DP05XTTR uniquely combines embedded fault detection, 100 mA per channel capability, and superior thermal management - making it the only choice for high-reliability outdoor LED systems requiring zero-pin-count diagnostics.

Availability

STP16DP05XTTR is available at Aetrix Electronics and suitable for outdoor signage, industrial HMI panels, architectural lighting controls, and test equipment indicators requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for STP16DP05XTTR 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, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The STP16DP05XTTR belongs to ST's LED driver product line, engineered specifically for high-reliability, thermally demanding LED display applications where fault visibility, current precision, and 3.3 V compatibility are non-negotiable.

FAQ

What is the purpose of the exposed pad on the STP16DP05XTTR package?

The exposed pad is a thermally conductive metal land beneath the die that must be soldered to a PCB copper pour (grounded or isolated) to achieve the specified 37.5 °C/W junction-to-ambient thermal resistance. Without proper soldering and thermal vias, R_thJA degrades to 55 °C/W, risking thermal shutdown at full 100 mA/channel load.

How does the STP16DP05XTTR perform open/short detection without adding pins?

It repurposes the OE/DM2 and LE/DM1 pins using a five-cycle clock sequence (Table 12) to enter detection mode. Once active, all 16 outputs drive simultaneously; fault status (open, short-to-GND, short-to-V_O) is encoded into the same 16-bit shift register and read back via SDO - no additional I/O required.

Can the STP16DP05XTTR drive LEDs directly from a 3.3 V microcontroller GPIO without level shifting?

Yes - all inputs (SDI, CLK, LE/DM1, OE/DM2) meet 3.3 V CMOS thresholds: VIH ≥ 0.7 × VDD (2.31 V min) and VIL ≤ 0.3 × VDD (0.99 V max). With VDD = 3.3 V, the device accepts standard 3.3 V logic levels directly, eliminating external level translators.

What is the minimum R_EXT value that maintains stable 100 mA output current?

Based on Table 7 and Figure 11, R_EXT = 190 Ω sets nominal 100 mA output at VDD = 5 V and VO = 1.3 V. At 3.3 V supply, R_EXT = 240 Ω yields ~96 mA (Table 7, IOL3); going below 190 Ω risks exceeding absolute max output current (100 mA) and may trigger thermal shutdown under sustained load.