CAT3614 Series

LED Driver, Charge Pump, 4-Channel

Catalog

LED Driver, Charge Pump, 4-Channel

Part	Topology	Current - Output / Channel	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case	Applications	Voltage - Supply (Min) [Min]	Mounting Type	Voltage - Supply (Max)	Number of Outputs	Supplier Device Package	Frequency [Max]	Frequency [Min]
ON Semiconductor CAT3614HV2-T2	Switched Capacitor (Charge Pump)	31 mA	85 °C	-40 °C	12-WFDFN Exposed Pad	Backlight	3 V	Surface Mount	5.5 V	4	12-TDFN (3x3)	1.3 MHz	800 kHz

Catalog

LED Driver, Charge Pump, 4-Channel

Key Features

• Drives up to 4 LED channels

• 1-wire EZDim™ Programmable LED Current

• Accurate 1mA Dimming Level

• Power efficiency up to 91%

• Fractional pump 1x/1.5x

• Low noise input ripple

• Fixed High Frequency Operation 1MHz

• "Zero" Current Shutdown Mode

• Soft start and current limiting

• Short circuit protection

• Thermal shutdown protection

Description

The CAT3614 is a high efficiency 1x/1.5x fractional charge pump with programmable dimming current in four LED channels. To ensure uniform brightness in LCD backlight applications, each LED channel delivers an accurate regulated current.Low noise and input ripple is achieved by operating at a constant switching frequency of 1MHz which allows the use of small external ceramic capacitors. The 1x/1.5x fractional charge pump supports a wide range of input voltages from 3 V to 5.5 V with efficiency up to 91%, and is ideal for Li-Ion battery powered devices.The EN/DIM logic input provides a 1-wire EZDim™ interface for dimming control of the LEDs. When enabled, a series of clock pulses reduces the LED brightness in 1mA steps on each negative going edge. Currents from 0 mA to 31 mA are supported.