Datasheet for DC875B:
- Manufacturer Part Number : DC875B
- Manufacturer : AD
- Description : Synchronous Buck-Boost High Power White LED Driver IC
- Series : LTC3453
- Reference Price : USD 0
- Our Price : We have a better price, contact us by email
- Product Type : LED Driver IC
- Function : Buck-Boost LED Drivers
- Current Suggest : Production
- Status : Production
- ROHS Status : ROHS Compliant (Lead Free)
- Package Type : LTC3454EDD Demo Board | Synchronous Buck-Boost LumiLED Driver
- Pins : -
- MFG Package Case : -
- Part Type : EVAL
- Standard Packing Type : -
- Standard Packing Quantity : -
- Working Temperature : -
- Other Part Number : DC875B
- Shipping methods : DHL FEDEX UPS TNT
- Delivery Time : Ship within 1 day.
- Manufacturer Production time : 6-8 weeks (Normally have stocks)
- Weight : 0.001KG
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The LTC3453 is a synchronous buck-boost DC/DC converter optimized for driving up to 4 white LEDs at a combined current of up to 500mA from a single Li-Ion battery input. The regulator operates in either synchronous buck, synchronous boost, or buck-boost mode, depending on input voltage and LED maximum forward voltage. Optimum efficiency is achieved using a proprietary architecture that determines which LED requires the largest forward voltage drop at its programmed current, and regulates the common output rail for lowest dropout. Efficiency of 90% can be achieved over the entire usable range of a Li-Ion battery (2.7V to 4.2V).
LED current is programmable to one of four levels (including shutdown) with dual current setting resistors and dual enable pins. In shutdown, the supply current is only 6µA.
A high constant operating frequency of 1MHz allows the use of a small external inductor. The LTC3453 is offered in a low profile (0.75mm) thermally enhanced 16-lead (4mm x 4mm) QFN package.
Applications
- Cell Phones
- Digital Cameras
- PDAs
- Portable Devices
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
