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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > LED Drivers

STMicroelectronics STP16CPPS05XTTR

Name: STP16CPPS05XTTR
Brand: STMicroelectronics
SKU: STP16CPPS05XTTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STP16CPPS05XTTR

Manufacturer:: STMicroelectronics

Category:: LED Drivers

Package:: 24-TSSOP (0.173", 4.40mm Width) Exposed Pad

Datasheet:: STP16CPPS05XTTR.pdf

Description:: IC LED DRVR LINEAR 40MA 24TSSOP

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Product details

Overview

STP16CPPS05XTTR from STMicroelectronics is a 16-channel constant-current LED sink driver IC designed for serially controlled LED panel displays. It integrates a 16-bit shift register, latch, and sixteen regulated current sources delivering 3–40 mA per channel with ±1% inter-channel accuracy at 5 mA. Its auto power-saving mode reduces supply current to 190 μA in shutdown, and it supports 30 MHz clock rates for high-speed data chaining in signage and industrial HMI applications.

For engineers reviewing the STP16CPPS05XTTR datasheet, STP16CPPS05XTTR pinout, STP16CPPS05XTTR application, or STP16CPPS05XTTR equivalent, key selection criteria include output current adjustability via R-EXT, 20 V output voltage headroom for series LED strings, TSSOP-24 exposed pad thermal performance (R_thJA = 37.5 °C/W), and 3.3 V MCU compatibility with level-shifted inputs.

Technical Context

The device implements a serial-in/parallel-out architecture where SDI feeds a 16-bit shift register, LE latches data into a D-type storage register, and OE enables/disables all 16 constant-current sinks simultaneously. Output current is set by an external resistor (R-EXT) connected to pin 23, enabling precise brightness control across all channels.

Its auto power-saving logic monitors latch state: when no new data is latched and OE remains low, the IC enters shutdown mode (<200 μA I_DD); detection of valid LE transitions triggers automatic wake-up. The exposed thermal pad on the TSSOP24 package must be soldered to PCB copper to achieve rated thermal resistance.

Key Specifications

Parameter	Value and Actual Design Meaning
Output channels	16 independent constant-current sinks, each programmable 3–40 mA via R-EXT
Current accuracy	±1% between outputs at 5 mA, ±2% unit-to-unit variation ensures uniform LED brightness
Max output voltage	20 V allows driving up to 6 white LEDs (3.2 V each) in series per channel
Supply voltage	3.0–5.5 V operation compatible with 3.3 V and 5 V logic domains
Max clock frequency	30 MHz supports >480 kbps serial data rate for real-time display updates
Thermal resistance	37.5 °C/W (junction-to-ambient) with exposed pad soldered - 2.5× better than standard TSSOP
Shutdown current	190 μA at 3.3 V enables ultra-low-power standby in battery-backed signage

Pinout & Package

TSSOP-24 package with exposed thermal pad (pin 1–24 layout); pad must be electrically connected to ground or isolated metal land per datasheet Figure 1.

Pin/Terminal	Circuit Role	Design Meaning
1 GND	Ground reference	Common return path for all currents; connects to thermal pad for heat dissipation
2 SDI	Serial data input	CMOS-compatible input accepting 3.3 V logic; cascades to next device's SDI via SDO
3 CLK	Serial clock input	Edge-triggered 30 MHz max; timing-critical for data setup/hold (t_SETUP = 8 ns)
4 LE	Latch enable	Level-sensitive; high level transfers shift register contents to output latch
5–20 OUT0–OUT15	Constant-current sink outputs	Each drives LED cathode; 20 V max compliance voltage supports series strings
21 OE	Output enable (active low)	PWM dimming control point; fast turn-on/off (t_ON = 29 ns @ 3.3 V)
22 SDO	Serial data output	Non-inverted output for daisy-chaining multiple drivers without external logic
23 R-EXT	Current setting resistor terminal	Connects to external resistor (497 Ω–23.7 kΩ) to set full-scale current (40–1 mA)
24 VDD	Power supply	3.0–5.5 V input; supplies internal logic and current sources; decoupling required

Key Features

Feature	Design Value
Auto power-saving	Reduces I_DD from 7.5 mA to 190 μA automatically when no new latch events occur
3.3 V MCU interface	VIH = 0.7 × VDD and VIL = 0.3 × VDD ensure reliable logic-level compatibility
High thermal efficiency	TSSOP-24 exposed pad lowers R_thJA to 37.5 °C/W - critical for dense LED arrays
Daisy-chain capability	SDI/SDO interface enables unlimited cascading without additional controllers or buffers
Output voltage headroom	20 V output compliance supports longer LED strings and higher forward voltage diodes

Applications

Indoor LED Signage

Industrial HMI Panels

Use Scenario: Dot-matrix alphanumeric displays in factory floor operator interfaces requiring high reliability and ambient temperature resilience.

IC Role / Device Role / Timing Role: Constant-current sink driver controlling individual LED segments; receives serialized display data via microcontroller SPI peripheral.

Use Value: ±1% current matching ensures uniform segment brightness across 16-channel modules, eliminating visual banding in multi-device arrays.

Use Scenario: Backlighting for 7-segment and custom LED indicators on PLC I/O modules operating continuously at 70 °C ambient.

IC Role / Device Role / Timing Role: High-voltage LED driver enabling single-supply 24 V system integration; OE pin used for PWM dimming synchronized to controller timer.

Use Value: 20 V output compliance allows direct drive of 6-series red LEDs without external boost circuitry, reducing BOM count and board space.

Retail Digital Price Tags

Transportation Status Displays

Use Scenario: Low-power e-paper auxiliary LED indicators in battery-operated shelf labels requiring multi-year operation.

IC Role / Device Role / Timing Role: Power-gated LED driver activated only during status update bursts; auto power-saving minimizes quiescent drain.

Use Value: 190 μA shutdown current extends coin-cell life beyond 5 years while maintaining instant wake-up response to BLE commands.

Use Scenario: Passenger information displays in rail cars subject to wide temperature swings (−40 °C to +85 °C) and vibration.

IC Role / Device Role / Timing Role: Robust LED sink with thermal shutdown protection (170 °C junction limit) and ESD-hardened I/O (2 kV HBM).

Use Value: Exposed-pad TSSOP package maintains safe junction temperature under continuous 40 mA/channel load even at 85 °C ambient.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLC59283RTJR	16-bit constant-current sink; 3–120 mA range; no auto power-saving; 25 MHz max clock	Higher max current but lacks thermal shutdown and auto-shutdown features	Preferred when >40 mA/channel is required and thermal management is handled externally
IS31FL3731-QFLS4-TR	I²C interface; built-in PWM engine; 28-channel; 0.5–40 mA; integrated fade control	Eliminates MCU bit-banging but requires I²C bus and occupies more firmware resources	Chosen for complex animation effects where MCU offload and channel granularity outweigh serial simplicity

Compared with TLC59283RTJR and IS31FL3731-QFLS4-TR, the STP16CPPS05XTTR uniquely balances high-speed serial simplicity, autonomous power management, and thermally optimized packaging - making it optimal for cost-sensitive, high-reliability LED matrix systems without embedded PWM engines.

Availability

STP16CPPS05XTTR is available at Aetrix Electronics and suitable for indoor LED signage, industrial HMI panels, retail digital price tags, and transportation status displays requiring stable component supply and long-term manufacturability.

Supply support for STP16CPPS05XTTR 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 STP16CPPS05XTTR belongs to ST's LED driver portfolio targeting energy-efficient, high-density display systems - engineered specifically for robust serial control, thermal resilience, and seamless integration with 3.3 V microcontrollers.

FAQ

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

The datasheet specifies R-EXT = 497 Ω achieves 40 mA typical output current at 25 °C with VDD = 3.3 V or 5 V. Using lower resistance values risks exceeding absolute maximum output current (50 mA) and may degrade current accuracy or thermal performance. Always verify actual current with load and temperature conditions.

Can STP16CPPS05XTTR drive LEDs directly from a 24 V supply?

No - VDD must remain within 3.0–5.5 V. However, the 20 V output voltage headroom (VO) allows the OUT pins to sink current from 24 V LED strings when the anodes are tied to 24 V and cathodes connect to OUTn. The IC itself is powered separately at 3.3 V or 5 V.

How does the auto power-saving feature interact with OE and LE timing?

Auto power-saving activates only when OE = L (outputs enabled) and no LE transition occurs for >100 ms. If OE is pulsed high (outputs disabled), the device remains in normal operation. LE must go high *and* latch new data to reset the auto-shutdown timer - OE state alone does not prevent shutdown.

Is the exposed thermal pad electrically connected internally?

No - the exposed pad is not connected to any internal circuit node. Per datasheet Figure 1 and Table 15, it must be either electrically isolated or connected to GND on the PCB to maximize thermal conduction. Leaving it floating degrades thermal performance and violates recommended layout.

STP16CPPS05XTTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 24-TSSOP (0.173", 4.40mm Width) Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Linear

Topology:: Shift Register

Internal Switch(s):: Yes

Number of Outputs:: 16

Voltage - Supply (Min):: 3V

Voltage - Supply (Max):: 5.5V

Voltage - Output:: 20V

Current - Output / Channel:: 40mA

Frequency:: 30MHz

Dimming:: -

Applications:: -

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 24-TSSOP-EP

STP16CPPS05XTTR FAQ

1.How can I place an order for STP16CPPS05XTTR through Aetrix?

Please submit a Request for Quotation (RFQ) for STP16CPPS05XTTR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for STP16CPPS05XTTR reliable?

The price and inventory of STP16CPPS05XTTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STP16CPPS05XTTR is usually 5 days.

3.What payment methods are accepted for STP16CPPS05XTTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STP16CPPS05XTTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STP16CPPS05XTTR?

STP16CPPS05XTTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STP16CPPS05XTTR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for STP16CPPS05XTTR?

For technical support, including STP16CPPS05XTTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STP16CPPS05XTTR requirements.

6.How does Aetrix verify that STP16CPPS05XTTR is sourced from the original manufacturer or authorized distributors?

All STP16CPPS05XTTR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STP16CPPS05XTTR meets industry standards.

7.What is the process for return or replacement of STP16CPPS05XTTR?

All STP16CPPS05XTTR units undergo pre-shipment inspection (PSI). If there is an issue with STP16CPPS05XTTR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The STP16CPPS05XTTR part is unused and in its original packaging.

Return procedure for STP16CPPS05XTTR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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