Single Flash LED Driver with Programmable 1.5A Current Source
Description
KTD2690 is the ideal power solution for high-power flash LEDs. The highly integrated synchronous boost converter and current source can support up to 1.5A flash and up to 376mA torch current. The device provides a very small total solution in a portable application. It has both I2C interface and hardware STROBE pin for maximum control flexibility. The integrated current source on/off and current settings in Flash/Torch/IR modes can be programmed by the I2C interface. A selectable input low voltage protection function can prevent a system reset under low battery conditions.
Various protection features are integrated into KTD2690, including cycle-by-cycle input current limit protection, output overvoltage protection, LED fault (open or short) protection, flash timeout protection, and thermal shutdown protection.
KTD2690 is available in a RoHS and Green 8-ball 1.519mm x 0.808mm x 0.500mm WLCSP package with 0.35mm pitch. Please contact a Sales Representative for the 10-lead 2mm x 2mm x 0.55mm UDFN package option.
Features
- High efficiency synchronous boost converter with 2MHz/4MHz switching frequency option
- I2C interface programming and hardware STROBE control
- Single-channel programmable current source
- Flash/Torch/IR modes
- Flash: Up to 1.5A (128 Levels)
- Torch: Up to 375mA (128 Levels)
- Input low voltage protection function
- Flash time-out protection
- LED cathode ground connection for improved thermal dissipation
- Flash/Torch/IR modes
- LED open/short protection
- I2C fault read back
- RoHS and Green compliant
- Pb-free Packages: WLCSP-8 or UDFN22-10L (please contact Sales Representative for UDFN option)
- -40°C to 85°C Operating Temperature Range
Applications
- Smartphones and Tablets
- IR LED Driver
- Digital Cameras
Packaging Information
| Package | Dimensions | Bumps | Package Code |
| UDFN22-10* | 2.00mm x 2.00mm x 0.55mm | 10 | VAB |
| WLCSP24-8 | 0.808mm x 1.519mm x 0.500mm | 8 | RAA |
*please contact sales representative for UDFN option
Parameters
| Vin (min) | Vin (max) | LED Channels | Max Current (A) |
| 2.7V | 5.5V | 3 | Flash: 1.5A Torch: 375mA |
Technical Documentation
| Description | Documents | Type |
|---|---|---|
| Datasheet | KTD2690-04b | |
| Package Outline Drawing | WLCSP24-8 RAA POD |
Evaluation Tools
| Documents | Type |
|
|---|---|---|
| User Manual | ||
| Quick Start Guide | ||
| Bill of Materials | XLSX | |
| Schematic | ||
| 3D Board |
Purchase
| Part Number | Marking | Operating Temperature | Package |
| KTD2690ERAA-TA | RGYWZNAABB | -40°C to +85°C | WLCSP24-8 |
| KTD2690EVAB-TA* | RGYWZ | -40°C to +85°C | UDFN22-10 |
*please contact sales representative for UDFN option
| Purchase Options |
|---|
| Buy from Digi-Key |
| Buy from Mouser |