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 19V OVP allow the KTD2511C to drive numerous parallel strings 5 LEDs in series with KTD2511C. 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 |
| TSOT23-6 | 2.90毫米 x 2.80毫米 x 0.85毫米 | HD |
| TDFN22-8 | 2.00毫米 x 2.00毫米 x 0.75毫米 | CE |
Technical Documentation
| Description | Documents | Type |
|---|---|---|
| Datasheet | KTD2511-04a | |
| Package Outline Drawing | TSOT23-6 HD POD |
Purchase
| Purchase Options |
|---|
| Buy from Digi-Key |
| Buy from Mouser |