ec6585d 2 channel charge pump supply for tft - lcd e - cmos corp. (ww w .e c mo s . c om.tw) 5 j06 n - rev. f001 1 / 7 .. general description the ec6585d is a high perfomance charge pump converter t o generate positive and negative voltage su pply optimized for small to medium size thin - film transistor(tft) liquid crystal di splays (lcds). the positive ch arge - pump controller provides 2x positive output volt age 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 ec6585d is con vinient to use and requires only 5 small and low - cost ceramic capacitors. it is availiable in t he tdfn - 12l package which reduces board size and make the fpc or pcb layout design easier. features ? 2.5v to 4.5v input supply ? po sitive output voltage range 4.5v to 6 v ? negative ou tput voltage range - 4.5v to - 6 v ? support x2 positive voltage charge pump ? negative voltage charge pump follow x( - 1) positive output voltage ? u p to 90% power conversion efficiency ? up to 100ma output current 5 0ma output current capability @vin=2.8v 8 0ma output current ca pability @vin=3. 3 v 10 0ma ou tput current capability @vin=3. 7 v ? 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 pa ckage ? rohs compliant and halogen free applications ? smart phone tft lcd bias power supply ? tablet tft lcd bias power supply ? car navigation display ? portable equipment pin assignments
ec6585d 2 channel charge pump supply for tft - lcd e - cmos corp. (ww w .e c mo s . c om.tw) 5 j06 n - rev. f001 2 / 7 pin description ordering information pin name pin no. description c3p 1 positive of the charge transfer capacitor 3. vsp 2 positive output voltage. connect a capacitor to gnd. c1p 3 positive of the charge transfer capacitor 1. c1n 4 negative of the charge transfer capacitor 1. gnd 5 ground pin. en 6 enable pin. active high. te 7 co ntrol pin. connect to ground if not used vin 8 input supply pin. c2n 9 negative of the charge transfer capacitor 2. c2p 10 positive of the charge transfer capacitor 2. vsn 11 negative output voltage. connect a capacitor to gnd. c3n 12 negative of the charge transfer capacitor 3. thermal pad - exposed pad. connect to ground or left floating. part number package marking marking information ec6585d nf1r tdfn 12l 6585 x llll l 1. x
ec6585d 2 channel charge pump supply for tft - lcd e - cmos corp. (ww w .e c mo s . c om.tw) 5 j06 n - rev. f001 3 / 7 function block diagram
ec6585d 2 channel charge pump supply for tft - lcd e - cmos corp. (ww w .e c mo s . c om.tw) 5 j06 n - rev. f001 4 / 7 typical application diagram
ec6585d 2 channel charge pump supply for tft - lcd e - cmos corp. (ww w .e c mo s . c om.tw) 5 j06 n - rev. f001 5 / 7 absolute maximum ratings note1: all voltages are referenced to ground with gnd pins grounded. note2: absolute maximum ratings indicate limits beyond which permanent damage to the device may occur. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. for guaranteed specifications and test conditions, see the electrical specifications. recommended operation conditions electrical characteristics (vin= 2 . 8 v, ta=25c, unless otherwise specified) input supply voltage, vin - 0.3v to 6.5v control signals input voltage, en, te - 0.3v to 6.5v positive output voltage, vsp +0.3v to 6.5v negative output voltage, vsn - 0.3v to - 6.5v storage temperature range - 55c to 150c lead temperature (soldering, 10s maximum) 260c esd, human body mode 2kv esd, machine mode 200v supply input voltage, vin 2.5v to 3. 7 v control signals input voltage range 1.4v to 3. 7 v junction temperature range - 40c to 125c ambient temperature range - 40c to 85c parameter symbol test conditions min typ max units input supply input supply voltage v in 2.5 2.8 4.5 v vin quiescent current i q en=te=low 1 ua en or te = high 3 ma supply current i in 150 ma output voltage positive output voltage vsp vin=2.8v,load ing=0ma~50ma 4.5 6. 0 v negative output voltage vsn vin=2.8v,loading=0ma~50ma - 6. 0 - 4.5 v positive output current i_vsp vin=2.8v 5 0 ma vin=3.3v 8 0 negative output current i_vsn vin=2.8v 5 0 ma vin=3.3v 8 0 control signal & protection en, te input low voltage v il 0.2x v in v en, te input high voltage v ih 1.4 v soft - start period t ss 1 ms input current limit i lim 1 a
ec6585d 2 channel charge pump supply for tft - lcd e - cmos corp. (ww w .e c mo s . c om.tw) 5 j06 n - rev. f001 6 / 7 power sequence (1)internal clock mode (2)external clock mode
ec6585d 2 channel charge pump supply for tft - lcd e - cmos corp. (ww w .e c mo s . c om.tw) 5 j06 n - rev. f001 7 / 7 package information t dfn 12l notes: 1) all dimensions are in millimeters. dimension min (mm) typ(mm) max (mm) a 0.40 0.45 0.50 a1 0.00 0.025 0.05 a3 0.152 ref b 0.15 0.20 0.25 d 2.40 bsc d2 1.70 1.80 1.90 e 1.50 bsc e2 0.40 0.50 0.60 e 0.40 bsc l 0.20 0.25 0.30
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