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

STMicroelectronics STP04CM05B1R

Name: STP04CM05B1R
Brand: STMicroelectronics
SKU: STP04CM05B1R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STP04CM05B1R

Manufacturer:: STMicroelectronics

Category:: LED Drivers

Package:: 14-DIP (0.300", 7.62mm)

Datasheet:: STP04CM05B1R.pdf

Description:: IC LED DRIVER LINEAR 400MA 14DIP

Quantity:: RFQ Add To RFQ list

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Inventory:3,698

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Product details

Overview

STP04CM05B1R from STMicroelectronics is a 4-channel constant-current LED sink driver with integrated 4-bit serial-in/parallel-out shift register and thermal shutdown protection. It delivers 80–400 mA per channel, supports 20 V output swing, operates from 3.3 V or 5 V logic, and features UVLO, POR, and ESD protection (2.5 kV HBM). It is used in high-brightness LED signage and architectural lighting systems requiring precise current regulation across multiple series-connected LEDs.

For engineers reviewing the STP04CM05B1R datasheet, STP04CM05B1R pinout, STP04CM05B1R application, or STP04CM05B1R equivalent, key selection criteria include adjustable current via R_EXT, 30 MHz clock tolerance for cascaded operation, latch-level control timing, thermal shutdown behavior at >125 °C junction temperature, and TSSOP16 exposed-pad thermal performance.

Technical Context

The device integrates a 4-bit shift register feeding a D-type storage latch, enabling serial data loading and parallel output latching independent of clock edges. Output enable (/OE) and latch enable (LE) are level-sensitive, asynchronous controls - no clock synchronization required for state changes.

Each of the four outputs is a regulated current sink with ±1% typical inter-channel matching and ±6% unit-to-unit variation at 80–400 mA. Current is set by a single external resistor (R_EXT) connected to pin 15, with dropout voltage as low as 0.3 V at 80 mA and up to 1.2 V at 400 mA.

Key Specifications

Parameter	Value and Actual Design Meaning
Output channels	4 independent constant-current sinks, each programmable 80–400 mA via R_EXT
Max output voltage	20 V - supports ≥6 white LEDs in series at typical VF (3.2 V)
Logic supply	3.3 V or 5 V compatible - interfaces directly with 3.3 V microcontrollers without level shifting
Max clock frequency	30 MHz - enables fast serial data loading for real-time brightness updates in dynamic displays
Thermal protection	Automatic output disable above 125 °C junction temperature, with automatic recovery on cooldown
ESD rating	2.5 kV HBM - sufficient for handling in standard assembly environments without special precautions
Operating temp	−40 °C to +125 °C - qualified for under-hood automotive lighting and industrial outdoor enclosures

Pinout & Package

STP04CM05B1R is housed in a thermally enhanced TSSOP16 package with exposed pad (pin 17 electrically isolated or grounded per layout guidelines). The exposed pad improves thermal resistance (R_thJA = 37.5 °C/W on JEDEC multi-layer board), critical for sustained 400 mA per channel operation.

Pin/Terminal	Circuit Role	Design Meaning
1, 2 GND	Power ground reference	Low-impedance return path for all output currents and logic; must be connected to large copper pour
3 SDI	Serial data input	CMOS-compatible input accepting 3.3 V or 5 V logic; feeds shift register LSB-first
4 CLK	Serial clock input	Edge-triggered clock (max 30 MHz); rising edge shifts data into register
5 LE	Latch enable	Level-sensitive control: high transfers shift register contents to output latch; low holds previous state
6–7, 10–11 OUT0–OUT3	Constant-current sink outputs	Four independent N-channel sink drivers; each sources current from VDD through external LEDs to these pins
8, 9, 12 N.C.	No connection	Internally unconnected; must remain floating or tied to GND per PCB layout best practice
13 /OE	Output enable (active low)	Asynchronous global disable: high forces all outputs OFF regardless of latch state
14 SDO	Serial data output	Daisy-chain capable: outputs shifted-out bit for cascading multiple STP04CM05 devices
15 R-EXT	Current-setting resistor terminal	Connects external resistor to set all four output currents simultaneously (e.g., 224 Ω → 350 mA)
16 VDD	Positive supply	3.3 V or 5 V logic and analog supply; decoupling capacitor (≥100 nF) required near pin

Key Features

Feature	Design Value
Single-resistor current programming	One external R_EXT sets identical current across all 4 channels - eliminates per-channel trimming and reduces BOM count
Level-sensitive latch & enable	LE and /OE respond immediately to logic levels - no clock dependency simplifies timing-critical lighting control
High-speed cascade interface	30 MHz CLK + SDO daisy-chain support enables synchronized control of dozens of LEDs using one MCU GPIO pair
Robust thermal management	TSSOP16 exposed pad + internal TSD ensures safe operation at full load in compact enclosures without forced air
Wide supply compatibility	Operates from 3.3 V logic (VIH = 0.7×VDD) - eliminates need for separate 5 V rail in modern low-voltage embedded systems

Applications

LED Signage Control

Automotive Exterior Lighting

Use Scenario: Outdoor digital billboards requiring uniform brightness across hundreds of RGB LED modules under variable ambient temperature.

IC Role / Device Role / Timing Role: Constant-current sink driver managing 4 parallel LED strings per IC; serial cascade synchronizes frame updates across entire display.

Use Value: ±1% inter-channel current matching ensures pixel-level color consistency; 20 V output headroom accommodates VF drift over lifetime and temperature.

Use Scenario: Tail lamp assemblies with dynamic turn-signal animation and brake light intensity modulation.

IC Role / Device Role / Timing Role: High-side switched LED driver (used with external high-side FET) delivering precise current to red/amber LED clusters during CAN-triggered sequences.

Use Value: −40 °C to +125 °C operation meets AEC-Q100 ambient requirements; TSD prevents thermal runaway during extended brake-light activation.

Architectural Accent Lighting

Industrial Machine Vision Illumination

Use Scenario: Linear LED strips embedded in building façades, requiring flicker-free dimming and long-term current stability.

IC Role / Device Role / Timing Role: Constant-current sink controlling 4 segments per fixture; PWM applied via /OE for smooth 1000:1 dimming ratio.

Use Value: UVLO prevents erratic behavior during brown-out conditions; 2.5 kV HBM withstands electrostatic discharge in installation environments.

Use Scenario: Stroboscopic backlighting for high-speed camera inspection systems where LED on-time must be precisely controlled to <100 ns.

IC Role / Device Role / Timing Role: Fast-switching current sink enabling sub-microsecond LED strobe pulses synchronized to image capture trigger.

Use Value: t_OFF ≤ 24 ns (at 5 V) ensures clean LED turn-off; 30 MHz CLK allows rapid reconfiguration between different illumination patterns.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLC59283PWPR	16-channel, 12-bit PWM dimming; no thermal shutdown; max 120 mA/channel; 17 V output	Requires external MCU PWM generation; better for fine-grained dimming but lacks autonomous TSD and higher current capability	Select when >4 channels or 4096-step dimming is required; avoid if thermal safety or >120 mA per string is needed
AL8863SP-13	Single-channel, 1.5 A buck LED driver; analog/digital dimming; no shift register; 40 V input	DC/DC topology improves efficiency at high input-output differential; no serial interface or multi-channel integration	Select for high-power single-string designs with wide input range; not suitable for serial-controlled multi-string arrays

Compared with TLC59283PWPR and AL8863SP-13, STP04CM05B1R uniquely combines 4-channel constant-current sinking, integrated shift/latch logic, thermal shutdown, and 20 V output in a single TSSOP16 package - making it optimal for space-constrained, thermally demanding, serially controlled LED arrays where reliability and simplicity outweigh ultra-fine dimming resolution.

Availability

STP04CM05B1R is available at Aetrix Electronics and suitable for LED signage control, automotive exterior lighting, and architectural accent lighting requiring stable component supply, long-lifecycle availability, and consistent parametric performance across production batches.

Supply support for STP04CM05B1R 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.

STP04CM05B1R belongs to ST's Power LED Driver product line, engineered specifically for high-reliability, thermally robust, serially controlled constant-current LED driving in commercial and automotive lighting applications.

FAQ

What is the minimum R_EXT value for 400 mA output per channel?

Per Table 7, I_OL2 = 400 mA occurs with R_EXT = 190 Ω (typical). The datasheet specifies R_EXT = 190 Ω yields 376–424 mA at V_O = 1.2 V. Using 190 Ω is the validated minimum for 400 mA nominal operation; lower values risk exceeding absolute maximum ratings or degrading accuracy.

Can STP04CM05B1R drive LEDs with forward voltage >20 V?

No. The absolute maximum output voltage (V_O) is 20 V per Table 3. Exceeding this risks permanent damage. For strings requiring >20 V, use a boost or SEPIC front-end stage to raise the rail voltage supplied to the LEDs' anodes, keeping cathode-side sink voltage within 20 V of that rail.

How does thermal shutdown behave during transient overloads?

TSD triggers when junction temperature exceeds ~125 °C (typical), forcing all outputs OFF. Recovery is automatic once T_J falls below the hysteresis threshold (~115 °C). No reset or command is needed - the device resumes normal operation after cooldown, preserving latch state and serial chain integrity.

Is the exposed pad electrically connected internally?

No. Per Figure 2 and Section 2.1, the exposed pad is electrically isolated from all internal circuitry. It must be soldered to a dedicated thermal land on the PCB - either left floating for thermal conduction only or connected to GND for improved EMI performance, as determined by system layout requirements.

STP04CM05B1R Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 14-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Obsolete

Type:: Linear

Topology:: Shift Register

Internal Switch(s):: Yes

Number of Outputs:: 4

Voltage - Supply (Min):: 3.3V

Voltage - Supply (Max):: 5.5V

Voltage - Output:: 19V

Current - Output / Channel:: 400mA

Frequency:: 30MHz

Dimming:: -

Applications:: -

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 14-DIP

STP04CM05B1R FAQ

1.How can I place an order for STP04CM05B1R through Aetrix?

Please submit a Request for Quotation (RFQ) for STP04CM05B1R 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 STP04CM05B1R reliable?

The price and inventory of STP04CM05B1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STP04CM05B1R is usually 5 days.

3.What payment methods are accepted for STP04CM05B1R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STP04CM05B1R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STP04CM05B1R?

STP04CM05B1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STP04CM05B1R 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 STP04CM05B1R?

For technical support, including STP04CM05B1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STP04CM05B1R requirements.

6.How does Aetrix verify that STP04CM05B1R is sourced from the original manufacturer or authorized distributors?

All STP04CM05B1R 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 STP04CM05B1R meets industry standards.

7.What is the process for return or replacement of STP04CM05B1R?

All STP04CM05B1R units undergo pre-shipment inspection (PSI). If there is an issue with STP04CM05B1R, 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 STP04CM05B1R part is unused and in its original packaging.

Return procedure for STP04CM05B1R:

1.Submit a request within 90 days.

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

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