Specification	CAT3649HV3-GT2

Applications	Backlight
Current - Output / Channel [custom]	25 mA
Dimming	Analog, PWM
Frequency [Max]	1.3 MHz
Frequency [Min]	1 MHz
Internal Switch(s)	True
Mounting Type	Surface Mount
Number of Outputs	6
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Package / Case	16-WFQFN Exposed Pad
Supplier Device Package	16-TQFN (3x3)
Topology	Switched Capacitor (Charge Pump)
Type	DC DC Regulator
Voltage - Output	7 V
Voltage - Supply (Max)	5.5 V
Voltage - Supply (Min) [Min]	2.4 V

CAT3649 Series

LED Driver, 6-Channel, with 32 Dimming Levels and PWM

Part	Number of Outputs	Voltage - Output	Topology	Voltage - Supply (Min) [Min]	Operating Temperature [Max]	Operating Temperature [Min]	Frequency [Min]	Frequency [Max]	Package / Case	Dimming	Type	Voltage - Supply (Max)	Supplier Device Package	Internal Switch(s)	Applications	Current - Output / Channel [custom]	Mounting Type
ON Semiconductor CAT3649HV3-GT2	6	7 V	Switched Capacitor (Charge Pump)	2.4 V	85 °C	-40 °C	1 MHz	1.3 MHz	16-WFQFN Exposed Pad	Analog PWM	DC DC Regulator	5.5 V	16-TQFN (3x3)		Backlight	25 mA	Surface Mount

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Description

General part information

CAT3649 Series

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.