14V/19V High Efficiency Step-Up LED Driver with PWM Control
Description
The KTD2511 is a versatile constant current LED driver with a high efficiency DC-DC step-up “boost” converter architecture. The low-side power MOSFET is integrated in the device, minimizing the total number of external components. High 1.2A current limit and 14V or 19V OVP allow the KTD2511D to drive numerous parallel strings of 3, with KTD2511D. KTD2511 can deliver 260mA total current with 3 series LEDs per string. It can also maximize the current capability while achieving high conversion efficiency. The optimized 1.0MHz switching frequency results in small external component size. The driver allows a wide range of PWM dimming frequencies through the EN pin.
Various protection features are built into the KTD2511, including cycle-by-cycle input current limit protection, LED open-circuit (output over voltage) protection and thermal shutdown protection. The leakage current in shutdown mode is less than 1µA.
The KTD2511 is available in a RoHS compliant 6-lead TSOT23 and 8-lead TDFN22 package.
Features
- Up to 3 or 5 series LEDs
- Integrated 20V high current switch (1.2A limit)
- High efficiency PWM converter (up to 90%)
- Low 200mV feedback voltage
- High accuracy across full load range
- VIN range 2.7V to 5.5V
- LED open-circuit (OVP) protection
- KTD2511C: 19V
- KTD2511D: 14V
- High switching frequency: 1MHz
- PWM dimming frequency: 100Hz to 200kHz
- Simple, small solution size
- Integrated Soft-start
- Shutdown Current less than 1µA
- Small TSOT23-6 and TDFN22-8 Package
- RoHS and Green compliant
- -40°C to +85°C Temperature Range
Applications
- LED backlighting
- Mobile Phones
- Handheld Devices
- Digital Photo Frames
- Automotive Navigation
Packaging Information
| Package | Dimensions | Package Code |
| TDFN22-8 | 2.00mm x 2.00mm x 0.75mm | CE |
| TSOT23-6 | 2.90mm x 2.80mm x 0.85mm | HD |
Technical Documentation
| Description | Documents | Type |
|---|---|---|
| Datasheet | KTD2511-04a | |
| Package Outline Drawing | TDFN22-8 CE POD | |
| Package Outline Drawing | TSOT23-6 HD POD |
Purchase
| Purchase Options |
|---|
| Buy from Digi-Key |
| Buy from Mouser |