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CAT3616HV4-T2 Datasheet(PDF) 1 Page - Catalyst Semiconductor |
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CAT3616HV4-T2 Datasheet(HTML) 1 Page - Catalyst Semiconductor |
1 / 14 page CAT3616 © Catalyst Semiconductor, Inc. 1 Doc. No. MD-5018 Rev. C Characteristics subject to change without notice 6-Channel Charge Pump LED Driver with EZDim TM FEATURES 6 LED channels with tight matching Independent Main and Sub 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 RoHS-compliant 16-pad TQFN 4mm x 4mm package APPLICATION Main and sub-display backlight Color LCD and keypad Backlighting Cellular Phones Handheld Devices Digital Cameras ORDERING INFORMATION Part Number Package Quantity per Reel Package Marking CAT3616HV4-T2 TQFN-16 (1) 2000 G616 CAT3616HV4-GT2 TQFN-16 (2) 2000 CDAH Notes: (1) Matte-Tin Plated Finish (RoHS-compliant). (2) NiPdAu Plated Finish (RoHS-compliant). DESCRIPTION The CAT3616 is a high efficiency 1x/1.5x fractional charge pump with programmable dimming current in six 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. Two groups of LEDs, main (MAIN1 to MAIN4) and sub (SUB1 and SUB2) are programmable through the ENM ¯¯¯ (active low) and ENS ¯¯¯ inputs. Independent current from 1mA to 31mA with a 1mA step are set by toggling the ENM ¯¯¯ and ENS ¯¯¯ inputs. The enable EN input pin allows to shutdown the device with zero quiescent current. The device is available in a 16- pad TQFN package with a max height of 0.8mm. PIN CONFIGURATION TQFN 16-pad 4 x 4mm (Top view) TYPICAL APPLICATION CIRCUIT Note: Unused LED channels must be connected to VOUT. For Ordering Information details, see page 13. |
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