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STMicroelectronics STCF06TBR
- Part No.:
- STCF06TBR
- Manufacturer:
- STMicroelectronics
- Category:
- LED Drivers
- Package:
- 25-TFBGA
- Datasheet:
-
STCF06TBR.pdf
- Description:
- IC LED DRV RGLTR I2C 25TFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,438
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Product details
Overview
STCF06TBR from STMicroelectronics is a buck-boost DC-DC LED driver IC designed for single high-power white LED flash control in mobile camera modules. It delivers up to 1.5 A output current (at VIN ≥ 3.5 V), operates from 2.7–5.5 V input, features 1.8 MHz fixed-frequency PWM, full I²C programmability, and integrated LED overtemperature/short/open protection.
For engineers reviewing the STCF06TBR datasheet, STCF06TBR pinout, STCF06TBR application, or STCF06TBR equivalent, key selection criteria include flash/torch dimming resolution (16 exponential steps), dual-mode current regulation (flash up to 1.5 A / torch up to 370 mA), NTC-based thermal protection, and TFBGA25 package compatibility with space-constrained smartphone PCB layouts.
Technical Context
The STCF06TBR implements a synchronous buck-boost topology that automatically selects operating mode (buck, boost, or buck-boost) based on real-time comparison of VOUT (VfLED + ILED×RFL) and VBAT, ensuring stable current regulation across 2.5–5.0 V LED forward voltage and 2.7–5.5 V battery range. Its 1.8 MHz switching frequency enables compact external passive sizing (e.g., 1.5 µH inductor, 4.7 µF output capacitor).
All functional states-shutdown, ready (with auxiliary red LED or NTC monitoring), flash (hard/soft-triggered), and torch-are controlled via I²C registers, including programmable safety time-out, flash/torch dimming (exponential 16-step), and status reporting (LED fault, NTC warning, junction overtemperature). The TRIG pin provides hardware-level flash activation synchronized with I²C command execution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Buck-boost DC-DC converter - auto-selects mode to maintain LED current regulation across varying VBAT and VfLED. |
| Max Flash Current | 1.5 A at VIN = 3.5–5.5 V - supports high-intensity camera flash with minimal thermal derating. |
| Torch Current Range | 29–370 mA - adjustable for video recording illumination with low-power, continuous operation. |
| Switching Frequency | 1.8 MHz fixed - enables use of small 0603/0805 passives and reduces EMI filtering burden. |
| I²C Interface | Standard-mode (100 kHz) - allows integration with baseband processors without dedicated GPIO resources. |
| Thermal Protection | Junction overtemperature shutdown at 140 °C with 20 °C hysteresis - prevents permanent damage during sustained flash bursts. |
| Shutdown Current | < 1 µA - preserves battery life in standby state for always-on mobile devices. |
Pinout & Package
STCF06TBR is housed in a 3 × 3 mm, 1.0 mm height TFBGA25 package with 0.5 mm pitch and bottom-side thermal pad for enhanced power dissipation in thin mobile form factors.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VLX1A, VLX1B, VLX2 | Inductor connection points | Three-phase inductor node interface enabling efficient buck-boost energy transfer; requires low-ESR ceramic inductor (e.g., 1.5 µH). |
| VOUT | Regulated LED output | Delivers controlled current to white LED anode; voltage ranges 2.5–5.0 V depending on LED Vf and sense resistor drop. |
| FB1, FB2, FB2S | Current sense feedback inputs | Monitor ILED×RFL and ILED×(RFL+RTR) to enable precise flash/torch current regulation and fault detection. |
| NTC | External thermistor interface | Connects to NTC resistor (e.g., 100 kΩ @ 25 °C) for LED temperature monitoring; triggers thermal foldback below VREF4 (0.56 V) or shutdown at VREF5 (1.2 V). |
| SCL / SDA | I²C bus interface | Standard bidirectional clock/data lines (3.0 V max) for register read/write, mode configuration, and status polling. |
| TRIG | Hardware flash trigger | Active-high input that initiates flash sequence when ANDed with TRIG_EN bit; enables deterministic timing independent of I²C latency. |
| ATN | Open-drain attention output | Asserts low to signal fault conditions (LED open/short, NTC error, overtemperature) to host processor interrupt line. |
| AUXL | Auxiliary red LED driver | Current-sink output (0–20 mA) for status indicator; dimmable via AUXI/AUXT registers for recording or charging feedback. |
| TMSK | TX mask control | Active-low input that reduces flash current during RF transmission to prioritize antenna power delivery and avoid interference. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-mode buck-boost regulation | Maintains ±10% current accuracy across 2.5–5.0 V LED Vf and 2.7–5.5 V battery, eliminating need for manual topology selection. |
| Dual independent current programming | Separate 16-step exponential dimming for flash (up to 1.5 A) and torch (up to 370 mA), enabling optimized power/performance trade-offs per use case. |
| Integrated fault protection suite | Detects and responds to LED open/short, chip overtemperature (140 °C), and NTC disconnect/overheat - latches or auto-recover based on register settings. |
| Hardware-triggered flash with soft/hard start | TRIG pin initiates sub-2 ms current ramp-up; eliminates software-induced jitter and ensures consistent exposure timing in camera pipelines. |
| Programmable flash safety timeout | Digitally settable duration (via FTIM_0–3 registers) prevents thermal runaway during erroneous host commands or firmware hangs. |
Applications
| Smartphone Camera Flash | Digital Still Camera Strobe |
|---|---|
|
Use Scenario: High-intensity burst illumination for low-light photography in compact smartphones with single-cell Li-ion battery (2.7–4.2 V). IC Role / Device Role / Timing Role: Primary flash LED current controller with I²C-configurable intensity, duration, and thermal management. Use Value: Delivers 1.5 A peak current at ≥3.5 V input while maintaining <10% current tolerance and automatic buck/boost mode switching to compensate for battery sag. |
Use Scenario: Synchronized strobe lighting in portable digital cameras requiring repeatable flash timing and consistent color temperature. IC Role / Device Role / Timing Role: Precision current source with hardware TRIG input for microsecond-level flash initiation and I²C-based dimming calibration. Use Value: Enables 16-step exponential dimming and programmable safety timeout to match scene luminance and prevent LED degradation during rapid-fire capture. |
| Mobile Video Torch | PDAs with Auxiliary Indicator |
|
Use Scenario: Continuous low-power illumination for video recording under ambient-limited conditions. IC Role / Device Role / Timing Role: Constant-current torch driver with 29–370 mA adjustment and thermal foldback via NTC. Use Value: Provides stable 370 mA output with <10% regulation error across battery discharge curve, extending usable runtime without visible flicker. |
Use Scenario: Dual-function status indication in handheld PDAs - red LED for recording active, green/blue for charging or connectivity. IC Role / Device Role / Timing Role: Auxiliary current sink (0–20 mA) with independent dimming (AUXI/AUXT registers) and fault-aware operation. Use Value: Eliminates need for discrete LED driver circuitry; supports programmable brightness and automatic disable during overtemperature events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED flash driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3644TME/NOPB | Single-inductor buck-boost architecture; 1.5 A flash / 375 mA torch; I²C interface; no dedicated NTC pin - uses internal thermal sensor only. | Lacks external NTC support and ATN fault signaling; requires host-side thermal estimation instead of direct LED temperature feedback. | Prefer when board space is extremely constrained and LED thermal monitoring is secondary to cost and simplicity. |
| TPS61310DSKR | Boost-only topology; 1.5 A flash / 200 mA torch; no I²C - uses EN/TRIG pins and external resistors for current setting. | No digital dimming or fault reporting; fixed current levels require BOM changes for intensity tuning; no NTC or overtemperature protection. | Select only for legacy designs lacking I²C infrastructure and where flash duration is fixed and thermal risk is mitigated by mechanical design. |
Compared with LM3644TME/NOPB and TPS61310DSKR, STCF06TBR uniquely combines external NTC-based LED temperature sensing, open-drain ATN fault signaling, and hardware TRIG synchronization - making it optimal for smartphone-grade reliability and adaptive flash control.
Availability
STCF06TBR is available at Aetrix Electronics and suitable for smartphone camera modules, digital still camera strobes, and PDA auxiliary LED systems requiring stable component supply, long-term lifecycle support, and traceable sourcing for consumer electronics production.
Supply support for STCF06TBR 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 analog/mixed-signal ICs with strong emphasis on power management and sensor integration.
The STCF06 belongs to ST's camera power management product line, engineered specifically for high-efficiency, thermally robust flash LED driving in battery-powered imaging devices with stringent size and reliability requirements.
FAQ
What is the minimum input voltage required to achieve 1.5 A flash current?
The STCF06TBR requires VIN ≥ 3.5 V to deliver its maximum rated flash current of 1.5 A. At 3.0 V input, maximum flash current drops to 1.3 A; at 2.7 V, it is limited to 1.0 A. This stepped current limitation is implemented to maintain regulation stability and thermal safety across the full battery discharge range.
How does the TMSK pin function during RF transmission?
The TMSK pin is an active-low input that, when asserted, forces immediate reduction of flash LED current to preserve battery voltage for RF power amplifiers. It operates independently of I²C commands and introduces no software latency, ensuring priority allocation to cellular/Wi-Fi transmission without compromising flash timing integrity.
Can the STCF06TBR drive multiple LEDs in parallel?
No - the STCF06TBR is designed exclusively for single high-power white LED driving. Its current-sense architecture (FB1/FB2) and protection logic (open/short detection) assume one LED string. Parallel LED configurations would cause unequal current sharing and invalidate fault detection thresholds, risking thermal runaway or false fault triggering.
Is the TFBGA25 package RoHS-compliant and lead-free?
Yes - the STCF06TBR TFBGA25 package is fully RoHS-compliant and lead-free, meeting JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) requirements. Reflow profile follows standard Pb-free guidelines with peak temperature ≤ 260 °C and time above liquidus ≤ 60 seconds.
STCF06TBR 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 ~ 5V
- Current - Output / Channel:
- 1.5A (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)
STCF06TBR FAQ
1.How can I place an order for STCF06TBR through Aetrix?
Please submit a Request for Quotation (RFQ) for STCF06TBR 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 STCF06TBR reliable?
The price and inventory of STCF06TBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STCF06TBR is usually 5 days.
3.What payment methods are accepted for STCF06TBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STCF06TBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STCF06TBR?
STCF06TBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STCF06TBR 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 STCF06TBR?
For technical support, including STCF06TBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STCF06TBR requirements.
6.How does Aetrix verify that STCF06TBR is sourced from the original manufacturer or authorized distributors?
All STCF06TBR 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 STCF06TBR meets industry standards.
7.What is the process for return or replacement of STCF06TBR?
All STCF06TBR units undergo pre-shipment inspection (PSI). If there is an issue with STCF06TBR, 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 STCF06TBR part is unused and in its original packaging.
Return procedure for STCF06TBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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