STCF04
High power white LED SuperCap driver with I²C interface-
Active
The STCF04 is a dedicated and space optimized high efficiency solution for driving a flash LED module in cameras, phones, PDAs and other handheld devices using the SuperCap technology. It is based on a DC-DC buck-boost converter, which ensures a proper and efficient charging control and monitoring of the SuperCap in the whole battery voltage range. The output current control ensures a good current regulation over the forward voltage spread characteristics of the flash LEDs in Torch and Flash mode operation. The SuperCap charging current is limited to a defined value which avoids overload of the battery. The SuperCap discharge current flows through the LEDs and the external MOSFET which must be chosen according to the desired flash current.
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Datasheet
Key Features
- Buck-boost converter with 1.5 A peak current limiting and synchronous rectification
- Burst mode operation when output is charged
- Input voltage range 2.5 V to 5.5 V
- Programmable output charging voltage up to 5.5 V
- Full I²C control
- Operation modes:
Shutdown mode Monitoring mode with NTC and SuperCap monitoring Idle mode Flash mode Torch mode: up to 320 mA - Controlled LED current in all modes
- Soft and hard triggering of Flash, Torch and Picture light modes
- Torch dimming in 12 exponential steps
- Flash dimming in 8 steps
- Active balancing of SuperCap voltage
- SuperCap status flag
- Internally or externally timed flash operation
- Digitally programmable safety timeout in Flash mode
- Torch mode safety timeout
- LED overtemperature detection and protection with external NTC resistor
- Shorted LED failure detection and protection
- Chip overtemperature detection and protection
Design Resources
TopTechnical Documentation
Product Specifications
| Description | Version | Size |
|---|---|---|
DS8947: High power white LED SuperCap™ driver with I²C interface
|
3.0 | 1,509 KB |
Application Notes
| Description | Version | Size |
|---|---|---|
|
AN3223: Driver for double flash LED with I²C interface
|
2.1 | 1,407 KB |
User Manual
| Description | Version | Size |
|---|---|---|
|
UM1541: STCF04 demonstration kit
|
1.0 | 1,119 KB |
Presentations & Training Material
Presentations
| Description | Version | Size |
|---|---|---|
|
Solutions for mobile and portable LED lighting
|
1.0.0 | 877 KB |
Related Tools and Software
Related Tools and Software
| Part Number | Description |
|---|---|
| STEVAL-TLL008V1 | Camera flash with SuperCap based on the STCF04 |
| STEVAL-TLL008V2 | Camera flash with SuperCap™ daughterboard based on the STCF04 |
Publications and Collaterals
Brochure
| Description | Version | Size |
|---|---|---|
|
ST’s solutions for mobile devices
|
1.0.0 | 2,217 KB |
Sample & Buy
Top| Part Number | Marketing Status | Package | Packing Type | Operating Temperature (min) | Operating Temperature (max) | Automotive Grade | Order From ST | Unit Price (US$)* @ | Distributor Availability | RoHS Compliance Grade | Download Material Declaration** |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| STCF04TBR | Active | uTFBGA 25 3x3x1.1 | Tape And Reel | -40 | 85 | _ |
| Ecopack2 | - | ||||||||||||
(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors (**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices. |
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