CAT4002A:LED Driver, 2-Channel, with 32 Dimming Levels and Rset
The CAT4002A provides a two matched low dropout current sources to drive LEDs. The CAT4002A uses an external resistor RSET to set the current in the LED channels. Each LED channel includes an individual control loop allowing the device to handle a wide range of LED forward voltages while still maintaining tight current matching. The EN/DIM logic inputs supports device enable and a digital dimming interface for setting the LED channel current with 32 linear dimming levels. LEDs can be powered directly from a Lithium-ion battery due to the low dropout (50 mV at 20 mA) current sinks. The device is available in the 6-lead TSOT-23 and SC-70.
技术特性
- Low quiescent ground current (0.5 mA typical)
- Power efficiency over 80%
- Compatible pinout with LT1937
- Adjustable output current (up to 40 mA)
- High frequency 1.2 MHz operation
- Input voltage operation down to 2.5 V
- Low resistance (0.5Ω) power switch
- Drives up to 4 White LEDs in series
- Shutdown current less than 1 µA
- Load fault protection against open-circuits
- Low value external components
终端产品
- Portable MP3 Players
- Mobile Phones
- Digital Cameras
应用
- Color LCD and keypad backlighting
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封装图 PACKAGE DIMENSIONS
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订购信息 Ordering Information
| 产品 |
状况 |
Compliance |
具体说明 |
封装 |
MSL* |
容器 |
预算价格 (1千个数量的单价） |
| 类型 |
外形 |
类型 |
数量 |
| CAT4002ASD-GT3 |
Active |
|
LED Driver, 2-Channel, with 32 Dimming Levels and Rset |
SC-88-6 / SC-70-6 |
419AD |
1 |
Tape and Reel |
3000 |
$0.32 |
| CAT4002ATD-GT3 |
Active |
|
LED Driver, 2-Channel, with 32 Dimming Levels and Rset |
TSOT-23-6 |
419AF |
1 |
Tape and Reel |
3000 |
$0.3067 |
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