SP6685 用于照相机闪光灯的电荷泵LED驱动器
The SP6683 is a high power current regulated charge pump ideal for converting a Li-Ion battery input for driving up to 8 white LED’s used in backlighting color displays. The SP6683 operates with an internal 1.2MHz clock, enabling the use of small external components. Output current can be accurately regulated by modulating the switcher between the charge pump and output capacitor. In shutdown mode, the SP6683 discharges the output to ground and draws less than 500nA current. Offered in 10-pin DFN package, the SP6683 family includes three options that allow the user to optimize LED driving circuit; SP6683-LV with low voltage reference, SP6683-03 with high impedance output in shutdown, and SP6683 with pulled down output in shutdown.
技术特性
- Output Current up to 700mA
- Up to 94% Efficiency in Torch Mode
- Adjustable FLASH mode current
- Minimum External Components: No Inductors
- Automatic buck/boost mode switchover
- Wide VIN Range: 2.7V to 5.5V
- High Frequency Operation: 2.4 MHz
- Low 50mV reference for low loss sensing
- IQ < 1μA in shutdown
- PWM Dimming Control
- Automatic Soft Start limits inrush current
- Over voltage protection on output
- Over current/temperature protection
- Low Ripple and EMI
- Ultra low dropout voltage in buck mode
- Space Saving 10-pin 3mm x 3mm DFN Package
订购信息 Ordering Information
| 器件型号 |
最低温度 |
最高温度 |
状态 |
立刻购买 |
申请样片 |
| SP6685ER-2-L |
-40 |
85 |
EOL |
|
|
| SP6685ER-2-L/TR |
-40 |
85 |
EOL |
|
|
| SP6685ER |
-40 |
85 |
OBS |
|
|
| SP6685ER-L |
-40 |
85 |
运行 |
|
|
| SP6685ER-L/TR |
-40 |
85 |
运行 |
|
|
| SP6685ER/TR |
-40 |
85 |
OBS |
|
|
| SP6685EB |
0 |
70 |
运行 |
|
|
技术指标
| 结构 |
Charge Pump |
| 应用 |
Flash |
| 频道 |
1 |
| 最低输入电压(V) |
2.7 |
| 最高输入电压(V) |
5.5 |
| 最高LEDs串联 |
1 |
| 每個频道最强电流（mA） |
700 |
| LED匹配精确度（%） |
n/a |
| CtrlType |
TTL |
应用领域 APPLICATION
- Cellular Phones
- LED Backlighting
- LCD Modules
- Handheld Devices
- Digital Cameras
- PDAs
- MP3 Players
功能框图 Functional Block Diagram
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