Datasheet for DC849A:
- Manufacturer Part Number : DC849A
- Manufacturer : AD
- Description : Single Cell 350mA LED Driver IC
- Series : LTC3490
- Reference Price : USD 0
- Our Price : We have a better price, contact us by email
- Product Type : LED Driver IC
- Function : Step-Up (Boost) LED Drivers
- Current Suggest : Production
- Status : Production
- ROHS Status : ROHS Compliant (Lead Free)
- Package Type : LTC3499EDD Demo Board | Reverse Batt Protection, 1.8V = VIN = 3V or 4.2V, Vout = 3.3V @ up to 250mA or Vout = 5V @ up to 170mA
- Pins : -
- MFG Package Case : -
- Part Type : EVAL
- Standard Packing Type : -
- Standard Packing Quantity : -
- Working Temperature : -
- Other Part Number : DC849A
- Shipping methods : DHL FEDEX UPS TNT
- Delivery Time : Ship within 1 day.
- Manufacturer Production time : 6-8 weeks (Normally have stocks)
- Weight : 0.001KG
Contact us to check the best price and real time inventory quantity for DC849A. If you need any more information about DC849A, you can also send us by email. Our email is [email protected], we will reply you in 12 hours.
The LTC3490 provides a constant current drive for 1W LED applications. It is a high efficiency boost converter that operates from 1 or 2 NiMH or alkaline cells and generates 350mA of constant current with up to 4V of compliance. It contains a 100mΩ NFET switch and a 130mΩ PFET synchronous rectifier. The fixed switching frequency is internally set to 1.3MHz.
The LTC3490 limits the output voltage to 4.7V if the output load is disconnected. It also features an analog dimming capability that reduces the drive current proportional to the CTRL/SHDN pin voltage. A low-battery logic output signals when the battery has dropped below 1V/cell. An undervoltage lockout circuit shuts down the LTC3490 when the battery voltage drops below 0.85V/cell. The feedback loop is internally compensated to minimize component count.
Applications
- Portable Lighting
- Rechargeable Flashlights
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.
