CAT3649:LED Driver, Quad-Mode®, 6-Channel
The CAT3649 is a high efficiency Quad-Mode® fractional charge pump that can drive up to six LEDs. The inclusion of a 1.33x fractional charge pump mode increases the device efficiency by up to 10% over traditional 1.5x charge pumps with no added external capacitors. Low noise input ripple is achieved by operating at a constant switching frequency which allows the use of small external ceramic capacitors. The multi-fractional charge pump supports a wide range of input voltages from 2.4 V to 5.5 V. The LED current can be adjusted in different ways. The full-scale LED current is set to 25 mA once the device is enabled. Analog dimming in 32 linear steps is achieved via a 1-wire pulse-dimming input (ADIM). Further adjustment of the LED current can be done by applying a pulse width modulation (PWM) signal on the PWM input. The PWM dimming control is compatible with content adaptive brightness control (CABC) for a wide range of PWM signal frequency up to 200 kHz. The CAT3649 can be shut down by holding the ADIM or PWM input in a logic low condition for greater than 30 ms.
技术特性
- High efficiency 1.33x charge pump
- Quad-mode charge pump: 1x, 1.33x, 1.5x, 2x
- Drives up to 6 LEDs at 32 mA each
- 1-wire EZDim™ LED current programming
- Power efficiency up to 92%
- Low noise input ripple in all modes
- “Zero” current shutdown mode
- Soft start and current limiting
- Short circuit protection
- Thermal shutdown protection
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应用
终端产品
- Mobile Phones
- Digital Still Cameras
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 |
| CAT3649HV3-GT2 |
Active |
|
LED Driver, Quad-Mode®, 6-Channel |
TQFN-16 |
510AD |
1 |
Tape and Reel |
2000 |
$0.6667 |
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