My Inquiry
My Account
STMicroelectronics STCF03ITBR
- Part No.:
- STCF03ITBR
- Manufacturer:
- STMicroelectronics
- Category:
- LED Drivers
- Package:
- 25-TFBGA
- Datasheet:
-
STCF03ITBR.pdf
- Description:
- IC LED DRVR RGLTR I2C 25TFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,276
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STCF03ITBR from STMicroelectronics is a high-efficiency buck-boost DC/DC LED driver IC designed for single-power-white-LED camera flash applications in mobile handsets. It delivers up to 800 mA flash current (at 3.3–5.5 V input), supports I²C programmable dimming across 16 exponential steps, and integrates LED overtemperature protection via external NTC. Its 1.8 MHz fixed-frequency PWM and synchronous rectification enable compact, low-noise designs in space-constrained smartphones.
For engineers reviewing the STCF03ITBR datasheet, STCF03ITBR pinout, STCF03ITBR application, or STCF03ITBR equivalent, key selection considerations include its dual-mode (flash/torch) current control, integrated open/short LED fault detection, I²C address configurability (4 options), and thermal shutdown with 20°C hysteresis - all critical for reliable, battery-efficient camera subsystems.
Technical Context
The STCF03ITBR implements a fully autonomous buck-boost topology that dynamically switches between step-down and step-up operation based on real-time comparison of VOUT (VfLED + ILED×RFL) and VBAT, ensuring stable current regulation across Li-ion battery discharge (2.7–5.5 V). Regulation uses dual feedback paths: FB1 senses torch-mode current via RTR, while FB2/FB2S sense flash-mode current via RFL.
Its I²C interface (SCL/SDA) enables full configuration of operational modes (Shutdown, Ready, Flash, Torch), safety timeout (FTIM_0–3), dimming registers (FDIM/TDIM/AUXI), and status monitoring (LED_F, NTC_W, OT_F). Hard-triggering via TRIG pin bypasses I²C latency for precise flash timing, while TMSK pin allows RF transmission priority by instantly reducing flash current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Buck-boost DC/DC converter - automatically selects mode to maintain LED current across full battery range (2.7–5.5 V). |
| Max Flash Current | 800 mA at 3.3–5.5 V input - sufficient for high-intensity camera strobes in smartphones. |
| Efficiency | 92% typ - minimizes power loss and thermal stress during flash bursts. |
| Switching Frequency | 1.8 MHz typ - enables use of small, low-profile inductors (e.g., 4.7 µH, 3.7×3.5 mm). |
| I²C Address Options | 4 configurable slave addresses via ADD pin - simplifies multi-device bus management on crowded phone PCBs. |
| Thermal Protection | Junction shutdown at 140°C with 20°C hysteresis - prevents permanent damage during sustained high-current operation. |
| Shutdown Current | < 1 µA - preserves battery life during standby in always-on mobile devices. |
Pinout & Package
STCF03ITBR is housed in a 3×3 mm, 0.7 mm max height µTFBGA25 package with 0.5 mm ball pitch, optimized for ultra-thin mobile handset designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN / PVBAT | Main power supply input | Accepts 2.7–5.5 V Li-ion battery; separate power path from logic rails reduces noise coupling. |
| VLX1A, VLX1B, VLX2 | Inductor connection points | Three-phase inductor interface supporting high-current switching with minimized parasitic inductance. |
| VOUT | LED anode output | Regulated output driving single white LED; voltage range 2.5–5.3 V adapts to LED forward voltage spread. |
| FB1, FB2, FB2S | Current-sense feedback inputs | FB1 monitors torch current (via RTR); FB2/FB2S monitor flash current (via RFL) for precision regulation. |
| SCL, SDA | I²C interface signals | Standard bidirectional bus interface; requires external 3.0 V pull-ups per I²C spec for reliable communication. |
| TRIG | Hardware flash trigger | Asynchronous active-HIGH input enabling sub-millisecond flash activation independent of I²C latency. |
| TMSK | Flash current mask | Active-HIGH input that forces immediate flash current reduction - prioritizes RF transmission over illumination. |
| ATN | Attention flag output | Open-drain, active-LOW signal indicating fault conditions (LED open/short, overtemp, NTC disconnect). |
| NTC | NTC thermistor interface | Connects to external 100 kΩ NTC for LED temperature sensing; enables dynamic current derating to prevent thermal runaway. |
| AUXL | Auxiliary red LED driver | Current-regulated output (0–20 mA) for status indicators - programmable brightness via AUXI_0–3 registers. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-mode LED current control | Independent 16-step exponential dimming for flash (up to 800 mA) and torch (up to 200 mA) - enables consistent color rendering and user experience across lighting modes. |
| Integrated fault protection | Detects and disables output on LED open/short, chip overtemperature (140°C), and NTC disconnection - eliminates need for external supervision circuitry. |
| Hardware-triggered flash | TRIG pin provides deterministic, low-jitter flash initiation - essential for synchronization with image sensor exposure timing. |
| RF-aware current masking | TMSK pin allows µP to instantly reduce flash current during cellular/Wi-Fi transmission - avoids battery voltage sag and RF interference. |
| Configurable safety timeout | Digitally programmable flash duration limit (FTIM_0–3) - prevents LED damage from firmware errors or I²C bus lockups. |
Applications
| Smartphone Camera Flash | Front-Facing Video Call Torch |
|---|---|
|
Use Scenario: High-intensity burst illumination for rear-camera still capture in low-light conditions. IC Role / Device Role / Timing Role: Primary flash LED driver regulating 800 mA current with <2 ms rise time and hardware TRIG synchronization to image sensor shutter. Use Value: Delivers consistent luminance despite battery voltage drop from 4.2 V to 3.3 V, enabled by buck-boost topology and 92% efficiency. |
Use Scenario: Continuous low-intensity illumination for front-facing camera during video calls. IC Role / Device Role / Timing Role: Torch-mode current regulator delivering 15–200 mA with 16-step exponential dimming for ambient-adaptive brightness. Use Value: Enables smooth, flicker-free illumination without interfering with RF transmission, using TMSK pin to throttle current during LTE/Wi-Fi activity. |
| Mobile Device Status Indicator | Compact Digital Still Camera Strobe |
|
Use Scenario: Red auxiliary LED signaling recording status or notification alerts. IC Role / Device Role / Timing Role: Auxiliary current source (0–20 mA) controlled via AUXI_0–3 registers and dimmed independently of main LED. Use Value: Eliminates need for separate LED driver IC - reduces BOM count and PCB area in space-constrained handsets. |
Use Scenario: High-reliability flash strobe in portable digital cameras with variable battery voltage. IC Role / Device Role / Timing Role: Fault-resilient LED driver with open/short LED detection and NTC-based thermal derating for extended burst sequences. Use Value: Prevents LED degradation during repeated flashes by enforcing safe junction temperatures via external NTC feedback loop. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-efficiency, I²C-controlled LED flash driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3644TME/NOPB | Single-inductor buck-boost; 1.5 MHz switching; max 1.5 A flash current; no dedicated TMSK pin. | Lacks hardware RF masking; relies on I²C-only control for current adjustment - higher latency in time-critical scenarios. | Preferred when higher peak current (>800 mA) is required and RF coexistence is managed at system level. |
| TPS61310DSKR | Boost-only topology; 2.5 MHz switching; max 1.2 A flash current; analog/digital dimming only. | Cannot regulate below battery voltage - unsuitable for low-VfLED LEDs or deeply discharged batteries (<3.0 V). | Select when cost sensitivity outweighs battery-voltage flexibility and integrated diagnostics. |
Compared with LM3644TME/NOPB and TPS61310DSKR, the STCF03ITBR uniquely combines buck-boost adaptability, hardware TRIG/TMSK pins for timing-critical and RF-coexistence use cases, and comprehensive fault reporting - making it optimal for premium smartphone camera subsystems where reliability and responsiveness are non-negotiable.
Availability
STCF03ITBR is available at Aetrix Electronics and suitable for smartphone camera flash modules, front-facing video call torch circuits, and compact digital still camera strobes requiring stable component supply and long-term lifecycle support.
Supply support for STCF03ITBR 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, specializing in automotive, industrial, and consumer ICs with strong analog and power management expertise.
The STCF03I product line targets mobile imaging power management, delivering highly integrated, fault-protected LED drivers optimized for thin, battery-powered handheld devices with stringent thermal and EMI constraints.
FAQ
What is the minimum input voltage required for STCF03ITBR to operate in flash mode?
The STCF03ITBR supports flash mode down to 2.7 V input, delivering up to 600 mA in this range. At 3.3–5.5 V, it achieves full 800 mA capability. Operation below 2.7 V is not guaranteed - the device enters undervoltage lockout (UVLO) with 2.3 V threshold and hysteresis to prevent erratic behavior during battery sag.
How does the STCF03ITBR handle LED forward voltage variation across temperature and unit-to-unit spread?
It uses dual feedback paths: FB1 regulates torch current via RTR, and FB2/FB2S regulate flash current via RFL, both referenced to precise internal 30–250 mV thresholds. Combined with buck-boost topology, this ensures ±10% output current tolerance regardless of VfLED drift from −40°C to +85°C or manufacturing variance.
Can the STCF03ITBR drive multiple LEDs in series or parallel?
No - the STCF03ITBR is strictly designed for single-power-white-LED operation. Its current-sense architecture (RFL/RTR), feedback structure, and protection logic assume one LED string. Driving multiple LEDs would violate absolute maximum ratings and disable open/short fault detection.
Is the NTC interface mandatory for basic operation?
No - the NTC connection is optional. The device operates fully in flash/torch modes without NTC; thermal protection defaults to internal junction sensing only. External NTC adds LED-specific overtemperature protection and enables dynamic current derating - recommended for high-duty-cycle applications.
STCF03ITBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 25-TFBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- DC DC Regulator
- Topology:
- Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 2.5V ~ 5.3V
- Current - Output / Channel:
- 800mA (Flash)
- Frequency:
- 1.8MHz
- Dimming:
- I2C
- Applications:
- Camera Flash
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 25-TFBGA (3x3)
STCF03ITBR FAQ
1.How can I place an order for STCF03ITBR through Aetrix?
Please submit a Request for Quotation (RFQ) for STCF03ITBR 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 STCF03ITBR reliable?
The price and inventory of STCF03ITBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STCF03ITBR is usually 5 days.
3.What payment methods are accepted for STCF03ITBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STCF03ITBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STCF03ITBR?
STCF03ITBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STCF03ITBR 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 STCF03ITBR?
For technical support, including STCF03ITBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STCF03ITBR requirements.
6.How does Aetrix verify that STCF03ITBR is sourced from the original manufacturer or authorized distributors?
All STCF03ITBR 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 STCF03ITBR meets industry standards.
7.What is the process for return or replacement of STCF03ITBR?
All STCF03ITBR units undergo pre-shipment inspection (PSI). If there is an issue with STCF03ITBR, 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 STCF03ITBR part is unused and in its original packaging.
Return procedure for STCF03ITBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STCF03ITBR Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
