LT3484-0 Photoflash Capacitor Charger

The LT®3484 family of photoflash capacitor charger ICs is designed for use in digital camera and mobile phone applications where space is at a premium. The LT3484's patented control technique allows it to use extremely small transformers, and the improved NPN power switch requires no external Schottky diode clamp, reducing solution size. Output voltage detection requires no external circuitry as the transformer turns ratio determines final charge voltage.

The devices feature a VBAT pin, which allows the use of 2 alkaline cells to charge the capacitor. The LT3484-0, -2 and -1 have primary current limits of 1.4A, 1A and 0.7A respectively, resulting in tightly controlled average input current of 500mA, 350mA and 225mA respectively. The three versions are otherwise identical.

The CHARGE pin gives full control of the part to the user. Driving CHARGE low puts the part in shutdown. The DONE pin indicates when the part has completed charging. The LT3484 series of parts are housed in a tiny low profile 2mm × 3mm DFN package

产品特点 Features
  • Highly Integrated IC in 2mm × 3mm DFN Package Reduces Solution Size
  • Uses Small Transformers:
  •     5.8mm × 5.8mm × 3mm
  • Fast Photoflash Charge Times:
        4.6s for LT3484-0 (0V to 320V, 100µF, VIN = 3.6V)
        5.7s for LT3484-2 (0V to 320V, 100µF, VIN = 3.6V)
        5.5s for LT3484-1 (0V to 320V, 50µF, VIN = 3.6V)
  • Operates from Two AA Batteries, or Any Supply from 1.8V up to 16V
  • Controlled Average Input Current
        500mA (LT3484-0)
        350mA (LT3484-2)
        225mA (LT3484-1)
  • No Output Voltage Divider Needed
  • No External Schottky Diode Required
  • Charges Any Size Photoflash Capacitor
  • Available in 6-Lead 2mm × 3mm DFN Package
应用
  • Digital Camera and Cell Phone Flash Charger
典型应用图
LT3484-0 典型应用
参数
LT3484-0 参数
LT3484-0 订购信息和价格参考Package Variations and Pricing
器件型号 封装 引脚 温度 价格 (以 1 ~ 99 片为批量) 价格 (以 1000 片为批量) *
LT3484EDCB-0 DFN 6 E $3.14 
LT3484EDCB-0#PBF DFN 6 E $3.14 
LT3484EDCB-0#TR DFN 6 E $3.14  $2.20 
LT3484EDCB-0#TRM DFN 6 E $3.14  $2.22 
LT3484EDCB-0#TRMPBF DFN 6 E $3.14  $2.22 
LT3484EDCB-0#TRPBF DFN 6 E $3.14  $2.20 
LT3484EDCB-1 DFN 6 E $3.14 
LT3484EDCB-1#PBF DFN 6 E $3.14 
LT3484EDCB-1#TR DFN 6 E $3.14  $2.20 
LT3484EDCB-1#TRM DFN 6 E $3.14  $2.22 
LT3484EDCB-1#TRMPBF DFN 6 E $3.14  $2.22 
LT3484EDCB-1#TRPBF DFN 6 E $3.14  $2.20 
LT3484EDCB-2 DFN 6 E $3.14 
LT3484EDCB-2#PBF DFN 6 E $3.14 
LT3484EDCB-2#TR DFN 6 E $3.14  $2.20 
LT3484EDCB-2#TRM DFN 6 E $3.14  $2.22 
LT3484EDCB-2#TRMPBF DFN 6 E $3.14  $2.22 
LT3484EDCB-2#TRPBF DFN 6 E $3.14  $2.20 
LT3484-0 数据手册及相关资料下载
  1. 数据手册(英文) : LT3484-0/LT3484-1/LT3484-2 - Photoflash Capacitor Chargers.PDF
  2. 可靠性数据 : R324 Reliability Data .PDF