STMicroelectronics STP16DP05B1R

Overview

STP16DP05B1R 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 supply, supports 30 MHz clock frequency, and delivers 20 V output driving capability for multi-LED series strings in panel displays.

For engineers reviewing the STP16DP05B1R datasheet, STP16DP05B1R pinout, STP16DP05B1R application, or STP16DP05B1R equivalent, key selection criteria include output current accuracy (±1.5% between bits), thermal performance of TSSOP24 exposed pad package (R_thJA = 37.5 °C/W), error detection logic timing sequence, and compatibility with 3.3 V microcontrollers.

Technical Context

The STP16DP05B1R integrates a 16-bit serial-in, parallel-out shift register feeding a 16-bit D-type storage register, followed by sixteen matched regulated current sinks. Its detection mode uses dedicated logic sequencing on OE/DM2 and LE/DM1 pins-no additional pins required-to enter/exit three-phase error detection (entry, sampling, resume) without disrupting normal operation.

Output current is set by R_EXT (e.g., 970 Ω → 20 mA; 190 Ω → 100 mA), with ±1.5% typical current matching between channels at V_O = 1.3 V. Propagation delays are tightly specified: t_PLH2 = 32–47 ns (LE→OUT), t_PLH3 = 27–41 ns (OE→OUT), enabling high-speed cascaded LED panel updates.

Key Specifications

Pinout & Package

STP16DP05B1R is supplied in TSSOP24 exposed pad package (JEDEC MO-153AA), where the exposed thermal pad must be soldered to PCB ground plane to achieve R_thJA = 37.5 °C/W and enable full 100 mA/channel operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC59283RTJR and IS31FL3728-QFLS4-TR, STP16DP05B1R uniquely combines wide current adjustability (5–100 mA), 20 V output headroom, per-pin fault detection, and high-speed serial cascade-making it optimal for large, reliability-critical LED display systems.

Availability

STP16DP05B1R is available at Aetrix Electronics and suitable for LED video walls, industrial HMIs, automotive instrument clusters, and architectural lighting controllers requiring stable component supply and long-term production continuity.

Supply support for STP16DP05B1R 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, power, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.

The STP16DP05B1R belongs to ST's LED driver portfolio, engineered specifically for high-reliability, high-density LED panel applications demanding precision current regulation, thermal robustness, and built-in diagnostics.

FAQ

What is the minimum recommended R_EXT value for 100 mA output current?

Per Table 7 and Figure 11, R_EXT = 190 Ω achieves 100 mA typical output current at V_DD = 3.3 V or 5 V and T = 25 °C. At higher temperatures or lower V_DD, derating is required; ST recommends verifying actual current with load and thermal conditions using the I_OUT vs. R_EXT curve in Figure 11.

How does the error detection mode interact with normal LED driving?

Error detection operates in a dedicated 5-clock-cycle entry sequence followed by 1 µs measurement window-during which outputs are actively driven to test LED integrity. Normal driving resumes immediately after detection data shifts out via SDO. The process halts LED updates temporarily but does not disrupt latch or clock functionality outside detection windows.

Can STP16DP05B1R drive LEDs with forward voltages exceeding 5 V per string?

Yes-the device supports up to 20 V output voltage per channel, enabling series strings of up to six 3.2 V white LEDs (19.2 V total) or seven 2.8 V red LEDs (19.6 V). Thermal limits must be observed: at 100 mA and 20 V, power dissipation reaches 2 W, requiring proper PCB copper area on the exposed pad.

Is the TSSOP24 exposed pad electrically isolated or grounded?

The exposed pad is internally connected to GND and must be soldered to a PCB copper pour tied to system ground. This provides both electrical reference stability and thermal conduction-failure to connect it degrades R_thJA from 37.5 °C/W to 55 °C/W and risks thermal shutdown above 60 mA/channel at elevated ambient.