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

STMicroelectronics STP1612PW05TTR

Name: STP1612PW05TTR
Brand: STMicroelectronics
SKU: STP1612PW05TTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STP1612PW05TTR

Manufacturer:: STMicroelectronics

Category:: LED Drivers

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

Datasheet:: STP1612PW05TTR.pdf

Description:: IC LED DRVR LIN PWM 60MA 24TSSOP

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Product details

Overview

STP1612PW05TTR from STMicroelectronics is a 16-channel constant-current sink LED driver with 16-bit PWM grayscale control, 8-bit global current gain (256-step), open/short LED fault detection, and 20 V output voltage capability. It operates from 3.3 V or 5 V supply, supports up to 30 MHz serial clock, and delivers per-channel current from 3 mA to 60 mA set by a single external resistor. It is used in high-fidelity RGB backlighting and video display LED panels requiring flicker-free imaging.

For engineers reviewing the STP1612PW05TTR datasheet, STP1612PW05TTR pinout, STP1612PW05TTR application, or STP1612PW05TTR equivalent, key selection considerations include its e-PWM ghost-effect reduction algorithm, dual-mode (12/16-bit) PWM counter, thermal flag reporting via SPI, staggered output delay programmability, and TSSOP24 exposed-pad package for thermal management in dense LED arrays.

Technical Context

The device implements a dual-size shift register (16-bit or 256-bit) controlled via SPI-compatible serial interface with LE strobe and SDI/SDO lines. Its PWM engine supports selectable 12-bit or 16-bit grayscale depth using enhanced PWM (e-PWM) that dithers MSB across refresh cycles to suppress visual artifacts.

Open/short LED detection runs synchronously during active drive, completing in 0.5 µs without image degradation; fault status is read back via SDO after "Enable Error Detection" and "Read Error Status Code" commands. Thermal protection triggers shutdown at >150 °C junction temperature and reports status in the configuration register bit 14.

Key Specifications

Parameter	Value and Actual Design Meaning
Output channels	16 constant-current sink outputs, each independently PWM-controlled
PWM resolution	Selectable 12-bit (4096 steps) or 16-bit (65536 steps) grayscale depth
Current range	3 mA to 60 mA per channel, set globally by single R_EXT resistor
Output voltage rating	20 V max - enables driving 5–6 series LEDs at typical forward voltages
Fault detection	Simultaneous open-circuit and short-circuit LED detection per channel, reported via SPI
Thermal protection	Thermal shutdown at ~150 °C junction; thermal flag bit (bit 14) readable in config register
Max clock frequency	30 MHz serial data rate - supports fast frame updates in high-refresh-rate displays
ESD rating	2.5 kV HBM, 200 V MM - suitable for assembly and field environments without additional protection

Pinout & Package

TSSOP24 exposed pad package (JEDEC MO-153AA), thermally optimized with soldered exposed pad connected to PCB ground plane for R_thJA = 37.5 °C/W.

Pin/Terminal	Circuit Role	Design Meaning
GND (Pin 1)	Ground reference	Primary return path for all output currents and internal logic; must be low-impedance
SDI (Pin 2)	Serial data input	CMOS-level input accepting command/data packets synchronized to CLK rising edge
CLK (Pin 3)	Serial clock input	Rising-edge-triggered clock; controls data shift and command execution timing
LE (Pin 4)	Latch/strobe control	Active-high signal defining command type (latch, read, write) based on CLK count during assertion
OUT0–OUT15 (Pins 5–20)	Constant-current sink outputs	16 dedicated open-drain outputs; each sinks programmed current when PWM active
PWCLK (Pin 21)	Grayscale clock input	Reference clock for PWM counter; determines grayscale update rate and e-PWM dither timing
SDO (Pin 22)	Serial data output	Tri-state output for reading configuration register or 16-bit error status code
R-EXT (Pin 23)	Current-setting resistor terminal	Analog input referencing internal 1.24 V bandgap; sets I_OUT = 1.24 × G / R_EXT
VDD (Pin 24)	Supply voltage	3.3 V or 5 V digital/analog supply; includes UVLO and internal POR circuitry

Key Features

Feature	Design Value
e-PWM ghost reduction	Scrambled PWM algorithm dithers MSB across frames to eliminate visible flicker and residual images in static content
Programmable staggered delay	Configurable output turn-on delay per group of 4 channels (OUTn4+1/2/3) to reduce peak inrush current and EMI
Dual-range 8-bit gain	256-step global brightness scaling with two selectable current ranges - preserves resolution at low and high intensity
Full LED error visibility	Real-time open/short detection per channel with 1-bit-per-output status code readable over SPI without interrupt
Drop-in compatibility	PIN-TO-PIN and FUNCTIONAL replacement for STP16CP/S/DP05 series - simplifies upgrade paths in legacy designs

Applications

RGB LCD Backlighting

Outdoor Video Billboard Panels

Use Scenario: Driving high-brightness RGB LED strings behind large-format LCD panels for dynamic contrast and local dimming.

IC Role / Device Role / Timing Role: Constant-current sink with per-channel 16-bit PWM and e-PWM dithering ensures smooth grayscale transitions and eliminates color breakup during motion.

Use Value: 20 V output headroom supports 5–6 series red/green/blue LEDs; thermal flag enables real-time derating in sealed enclosures.

Use Scenario: High-density outdoor LED matrix displays subject to wide ambient temperature swings and long duty cycles.

IC Role / Device Role / Timing Role: Fault-tolerant LED driver with integrated open/short detection and thermal shutdown prevents localized failures from cascading across modules.

Use Value: Exposed-pad TSSOP24 package maintains <150 °C junction under continuous 60 mA/channel load; error status code enables remote diagnostics via SPI bus.

Architectural Accent Lighting

Medical Imaging Display Backlights

Use Scenario: Precise dimming and color-matching in architectural LED strips where uniformity and long-term stability are critical.

IC Role / Device Role / Timing Role: 8-bit global gain + 16-bit per-channel PWM provides 24-bit effective brightness control while minimizing microcontroller overhead.

Use Value: ±6% current accuracy across channels and temperature ensures consistent luminance across hundreds of nodes without per-unit calibration.

Use Scenario: Diagnostic-grade medical monitors requiring flicker-free, artifact-free grayscale rendering for radiological interpretation.

IC Role / Device Role / Timing Role: e-PWM engine with auto-synchronization mode eliminates temporal aliasing in static DICOM images.

Use Value: 0.5 µs LED fault detection enables immediate channel disable before thermal damage occurs - critical for Class II medical safety compliance.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLC5947 (Texas Instruments)	24-channel, 12-bit PWM only; no e-PWM; requires external VREF; no open/short detection	Lacks per-channel fault visibility and ghost reduction - suited for lower-cost signage, not medical or broadcast displays	Choose when channel count >16 is required and fault reporting is non-critical
IS31FL3731 (Lumissil)	18-channel, 8-bit PWM + 6-bit global; built-in gamma correction; I²C interface; no R-EXT current setting	Fixed 25 mA max per channel; no 20 V output rating - limited to low-V_f RGB or monochrome arrays	Choose for space-constrained I²C systems needing gamma tuning, not high-voltage or high-fault-visibility use cases

Compared with TLC5947 and IS31FL3731, STP1612PW05TTR uniquely combines 16-bit grayscale with hardware-accelerated e-PWM, full per-channel fault visibility, and 20 V drive capability - making it optimal for high-reliability, high-fidelity LED video applications where image integrity and system diagnostics are mandatory.

Availability

STP1612PW05TTR is available at Aetrix Electronics and suitable for RGB backlighting, outdoor video billboards, and medical imaging display backlights requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for STP1612PW05TTR 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 STP16xx family targets high-performance LED display systems, emphasizing precision current matching, advanced PWM fidelity, and integrated diagnostics - directly addressing design challenges in video walls, broadcast lighting, and safety-critical visual interfaces.

FAQ

What is the function of the PWCLK pin and how does it affect grayscale performance?

PWCLK is the dedicated reference clock for the grayscale PWM counter. Its frequency directly determines the PWM update rate and influences e-PWM dither timing. A stable, low-jitter PWCLK ensures consistent grayscale linearity and minimizes visual artifacts. The device supports PWCLK frequencies up to 30 MHz, enabling high-refresh-rate operation without compromising 16-bit resolution.

How does the open/short LED detection work without disrupting display operation?

Open/short detection executes in ≤0.5 µs while all 16 outputs remain active, using brief diagnostic pulses superimposed on normal drive waveforms. The test occurs synchronously during active PWM cycles and does not require blanking or frame interruption. Detected faults are stored in a 16-bit status register readable via SPI, allowing non-intrusive, real-time monitoring.

Can the STP1612PW05TTR drive LEDs with forward voltages exceeding 5 V?

Yes - the device guarantees 20 V output voltage capability per channel. This allows driving up to six standard red/green/blue LEDs in series (e.g., 3.2 V × 6 = 19.2 V) from a 5 V supply rail. The 20 V rating is independent of VDD and applies across the full operating temperature range (-40 °C to +125 °C).

What thermal management is required for continuous 60 mA/channel operation in TSSOP24 exposed-pad package?

For sustained 60 mA/channel operation, the exposed pad must be soldered to a minimum 200 mm² copper thermal land connected to internal/external ground planes. With this layout, R_thJA drops to 37.5 °C/W, limiting junction rise to ~56 °C above ambient at 125 °C max case temperature - well below the 150 °C thermal shutdown threshold.

STP1612PW05TTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

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:: 60mA

Frequency:: 30MHz

Dimming:: PWM

Applications:: Backlight

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 24-TSSOP

STP1612PW05TTR FAQ

1.How can I place an order for STP1612PW05TTR through Aetrix?

Please submit a Request for Quotation (RFQ) for STP1612PW05TTR 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 STP1612PW05TTR reliable?

The price and inventory of STP1612PW05TTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STP1612PW05TTR is usually 5 days.

3.What payment methods are accepted for STP1612PW05TTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STP1612PW05TTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STP1612PW05TTR?

STP1612PW05TTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STP1612PW05TTR 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 STP1612PW05TTR?

For technical support, including STP1612PW05TTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STP1612PW05TTR requirements.

6.How does Aetrix verify that STP1612PW05TTR is sourced from the original manufacturer or authorized distributors?

All STP1612PW05TTR 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 STP1612PW05TTR meets industry standards.

7.What is the process for return or replacement of STP1612PW05TTR?

All STP1612PW05TTR units undergo pre-shipment inspection (PSI). If there is an issue with STP1612PW05TTR, 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 STP1612PW05TTR part is unused and in its original packaging.

Return procedure for STP1612PW05TTR:

1.Submit a request within 90 days.

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

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