STMicroelectronics STP16CPC26XTR

Overview

STP16CPC26XTR from STMicroelectronics is a 16-channel constant-current LED sink driver IC with serial interface, ±1% channel-to-channel current accuracy, 5–90 mA programmable output per channel via external R_EXT, and 20 V output voltage rating for driving long LED strings. It operates from 3–5.5 V supply and supports 30 MHz clock frequency for high-speed display data loading in video panel applications.

For engineers reviewing the STP16CPC26XTR datasheet, STP16CPC26XTR pinout, STP16CPC26XTR application, or STP16CPC26XTR equivalent, key selection criteria include guaranteed 20 V sink capability, thermal shutdown at 170 °C, adjustable current programming, bit-to-bit current matching, and compatibility with cascaded serial LED driver architectures.

Technical Context

The device integrates a 16-bit shift register, parallel latch, and 16 independent regulated current sinks-all controlled by level-sensitive LE and OE inputs. Its analog stage uses an external resistor (R_EXT) to set all 16 channels identically, with current regulation maintained across V_DS up to 20 V and supply voltage variations (±1%/V).

Timing is asynchronous to clock edges: data is sampled on CLK rising edge, latched on LE high, and enabled/disabled by OE (active-low). Propagation delays from CLK/LE/OE to OUT are ≤100 ns (typ), and SDO supports daisy-chaining with t_PLH/t_PHL ≤30 ns (V_DD = 5 V).

Key Specifications

Pinout & Package

The STP16CPC26XTR is available in SO-24, TSSOP-24, QSOP-24, and TSSOP-24 with exposed pad packages. All variants share identical pinout and function mapping.

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 MAX6966ATL+, the STP16CPC26XTR offers superior 20 V sink capability and integrated thermal shutdown-critical for unventilated video panels-while maintaining minimal external component count and high-speed serial throughput.

Availability

STP16CPC26XTR is available at Aetrix Electronics and suitable for video display panels, architectural lighting systems, industrial HMIs, and automotive interior lighting requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for STP16CPC26XTR 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 power management, analog, MEMS, and microcontroller solutions for industrial, automotive, and consumer markets.

The STP16CPC26XTR belongs to ST's LED driver product line, engineered specifically for high-reliability, high-density LED array control in professional display and architectural lighting applications where precision current matching and thermal resilience are critical.

FAQ

What is the minimum recommended R_EXT value for stable 90 mA operation?

The datasheet specifies 217 Ω for 90 mA output, with 220 Ω as the closest E24 standard value. Using 220 Ω yields ~89.5 mA per channel at 25 °C. For production, verify actual current at worst-case V_DD (3.0 V) and temperature (-40 °C to +125 °C), as current varies ±1%/V_DD and exhibits ±6% unit-to-unit tolerance.

Can STP16CPC26XTR drive LEDs with common-anode configuration?

No-it is a sink-only driver with 16 N-channel current sinks. It requires LEDs wired in common-anode topology (anodes tied to positive rail, cathodes connected to OUT0–OUT15). For common-cathode LED arrays, a high-side switch or complementary driver IC is required upstream.

How does thermal shutdown interact with OE and LE control signals?

When thermal shutdown activates at 170 °C, all outputs are forced OFF independently of OE and LE states. Outputs remain disabled until junction temperature falls below 155 °C (170 °C – 15 °C hysteresis), after which normal operation resumes using the last-latched data and current settings.

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

Per DS7104 Rev 7, the exposed pad is thermally conductive but not internally connected to any pin. It must be soldered to a dedicated PCB copper land-electrically isolated or connected to GND per layout requirements-to achieve the specified 37.5 °C/W R_thJA and ensure reliable thermal performance.