EC6585

2 Channel Charge Pump

Supply for TFT-LCD

E-CMOS Corp. (www.ecmos.com.tw)

5J21N-Rev. F003

1/8

..

General Description

The

EC6585

is

a

high

perfomance charge pump converter to generate positive and negative voltage

supply optimized for small to medium size thin-film transistor(TFT) liquid crystal di

splays (LCD’s). The positive

charge-pump controller provides 2x positive output voltage PAVDD and fixed -1x ratio of negative voltage

NAVDD to supply the TFT LCD. To minimize the inrush current a built-in soft start circuit sets the soft

start period.

The EC6585 is convinient to use and requires only 5 small and low-cost ceramic capacitors.It is

availiable in the TDFN-12L

package

which reduces board size and make the FPC or PCB layout design

easier.

Features



2.5V to 4.5V Input Supply



Positive Output Voltage Range 4.5V to 6V



Negative Output Voltage Range -4.5V to -6V



Support x2 Positive Voltage Charge Pump



Negative Voltage Charge Pump Follow x(-1) Positive Output Voltage



Up to 90% power conversion Efficiency



Up to 100mA output current

50mA Output Current Capability @VIN=2.8V

80mA Output Current Capability @VIN=3.3V

100mA Output Current Capability @VIN=3.7V



Build-in Soft-Start to Reduce Inrush Current



Cycle by Cycle Input Current Limit Protection



Small 12-pin 2.4mm*1.5mm*0.45mm TDFN Package



RoHS Compliant and Halogen Free

Applications



Smart Phone TFT LCD Bias Power Supply



Tablet TFT LCD Bias Power Supply



Car Navigation Display



Portable equipment

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