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CAT3614 Datasheet(PDF) 1 Page - Catalyst Semiconductor |
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CAT3614 Datasheet(HTML) 1 Page - Catalyst Semiconductor |
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1 / 13 page  CAT3614 © Catalyst Semiconductor, Inc. 1 Doc. No. MD-5035, Rev.B Characteristics subject to change without notice 4-Channel 1-Wire LED Driver in 3 x 3mm Package FEATURES Drives up to 4 LED channels 1-wire EZDim TM 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 TDFN 12-pad 3mm x 3mm package APPLICATIONS LCD Display Backlight Cellular Phones Digital Still Cameras Handheld Devices ORDERING INFORMATION Part Number Package Quantity per Reel Package Marking CAT3614HV2-T2 TDFN-12 (1) 2000 HAAA CAT3614HV2-GT2 TDFN-12 (2) 2000 HAAC Notes: (1) Matte-Tin Plated Finish (RoHS-compliant). (2) NiPdAu Plated Finish (RoHS-compliant). 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 3V to 5.5V with efficiency up to 91%, and is ideal for Li-Ion battery powered devices. The EN/DIM logic input provides a 1-wire EZDim TM 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 0mA to 31mA are supported. The device is available in the tiny 12-pad TDFN 3 x 3mm package with a max height of 0.8mm. For Ordering Information details, see page 12. PIN CONFIGURATION TDFN 12-Pad 3 x 3mm (Top View) TYPICAL APPLICATION CIRCUIT Note: Unused LED channels must be connected to VOUT. 1 3 4 6 12 9 7 VIN C1- C2- GND VOUT 211 C1+ EN/DIM 58 C2+ LED2 LED4 LED3 LED1 10 GND VIN 3V to 5.5V 20mA LED2 LED3 LED1 LED4 EN/DIM CAT3614 VIN VOUT VOUT 1µF 1µF CIN C1- C1+ C2- C2+ 1µF 1µF COUT ENABLE/ DIMMING |
Similar Part No. - CAT3614_08 |
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Similar Description - CAT3614_08 |
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