CAT3649:LED Driver, 6-Channel,with 32 Dimming Levels and PWM Data sheet

PublishTime：2021-06-03

The CAT3649 is a high efficiency 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.
●Features
■High Efficiency 1.33x Charge Pump
■Drives up to 6 LEDs at 25 mA Each
■PWM Dimming 100 Hz to 200 kHz for CABC
■Quad-mode Charge Pump: 1x, 1.33x, 1.5x, 2x
■1-wire EZDimTM 32 Linear Steps (ADIM)
■Power Efficiency up to 92%
■Low Noise Input Ripple in All Modes
■Zero Current Shutdown Mode
■Soft Start and Current Limiting
■Short Circuit Protection

Brand of Product：	ON Semiconductor
Part#：	CAT3649HV3-GT2 、 CAT3649 More Part#
Product Category：	LED Driver, 6-Channel 、 high efficiency fractional charge pump More
Application：	[ LCD Display Backlight ][ Mobile Phones ][ Digital Still Cameras ] More
Data Type：	Datasheet More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：	TQFN-16
Language：	English Chinese Chinese and English Japanese
Date of Creation：	5/22/2021
Version Number：
Data Encoding：
Data Size：	230 KB

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