STMicroelectronics STP16CPC26PTR

Overview

STP16CPC26PTR from STMicroelectronics is a monolithic 16-bit constant-current LED sink driver with serial interface, designed for high-density LED panel driving. It delivers precisely regulated output currents from 5 mA to 90 mA per channel, supports up to 30 MHz clock frequency, and features ±1% typical bit-to-bit current accuracy and 20 V output voltage rating - enabling series-connected LED strings in video display panels.

For engineers reviewing the STP16CPC26PTR datasheet, STP16CPC26PTR pinout, STP16CPC26PTR application, or STP16CPC26PTR equivalent, key selection criteria include adjustable current programming via R-EXT, thermal shutdown at 170 °C, OE-controlled 0–100% brightness dimming, and compatibility with SO-24/TSSOP-24/QSOP-24 packages for space-constrained PCB layouts.

Technical Context

The device integrates a 16-bit shift register, parallel latch, and 16 independent current-regulated sink channels - all controlled by SDI, CLK, LE, and OE signals. Its analog stage uses an external resistor (R-EXT) to set a uniform reference current, which is replicated across all outputs with <±1% matching under matched load conditions.

Timing behavior is asynchronous to OE/LE: latch updates occur on LE high, while output enable/disable is immediate and level-sensitive. Propagation delays from CLK/LE/OE to OUTn are ≤100 ns (typ), and SDO supports daisy-chaining for multi-device cascading without added timing overhead.

Key Specifications

Pinout & Package

The STP16CPC26PTR is available in SO-24, TSSOP-24, QSOP-24, and TSSOP-24 with exposed pad - all RoHS-compliant ECOPACK® packages. The exposed-pad variant requires soldering to PCB copper for optimal thermal performance (R_thJA = 37.5 °C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC59283RTJR and IS31FL3728-QFLS4-TR, the STP16CPC26PTR offers superior thermal safety (integrated 170 °C shutdown), tighter current matching (±1% vs ±2.5–3%), and lower system-level BOM cost due to no external thermal sensor or I²C pull-ups required.

Availability

STP16CPC26PTR is available at Aetrix Electronics and suitable for video display panels, architectural lighting, industrial HMIs, and automotive interior lighting requiring stable component supply across extended production cycles.

Supply support for STP16CPC26PTR 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 devices for industrial, automotive, and consumer markets.

The STP16CPC26PTR belongs to ST's LED driver portfolio targeting high-reliability, high-density visual applications - engineered specifically for robustness in continuous-duty LED signage and panel backlighting.

FAQ

What is the minimum recommended R-EXT value for 90 mA output current?

The datasheet specifies 217 Ω for 90 mA, with 220 Ω as the closest E24 standard value. Using 220 Ω yields ~89.5 mA per channel at 25 °C. For production designs, verify actual current at worst-case VDD (3 V) and temperature (-40 °C to +125 °C), as %/dVDD and %/dT specs indicate ±1%/V and ±6% device-to-device variation.

Can STP16CPC26PTR drive LEDs directly from a 24 V rail?

No - the device is a sink driver with 20 V absolute maximum output voltage (VO). To drive LEDs from 24 V, place the LED anode at 24 V and connect cathode to OUTn; the voltage across the device will be 24 V minus LED forward voltage (e.g., 24 V − 20 V = 4 V drop), staying within rating only if total LED VF ≤ 4 V. For higher VF strings, use external high-side switching or reduce rail voltage.

How does thermal shutdown affect daisy-chained operation?

When thermal shutdown activates, all 16 outputs disable immediately - including those downstream in a daisy chain. SDO continues shifting data, but latched values become irrelevant until junction temperature falls below (170 °C − 15 °C) = 155 °C. No reset or reinitialization is needed; operation resumes automatically with prior latch state preserved.

Is the exposed pad on TSSOP-24 variant electrically connected internally?

No - the exposed pad is not bonded to any internal die node. Per DS7104 Rev 7 page 23, it must be electrically isolated or connected to GND on the PCB for thermal conduction. Connecting it to VDD or floating it degrades thermal performance and risks reliability failure under sustained load.