TCA62753FUG (ver04)2005-11-10 0 tentative toshiba cmos integrated circiuts silicon monolithic TCA62753FUG charge pump type dc/dc converter for white led driver toshiba microelectronics corp. application engineering group 3 ver data note charge chek 0.1 2005-08-01 new miura 0.2 2005-08-10 tsd miura 0.3 2005-10-17 pin a ssignment miura 0.4 2005-11-10 electrical characteristics miura
TCA62753FUG (ver04)2005-11-10 1 tentative toshiba cmos integrated circiuts silicon monolithic TCA62753FUG charge pump type dc/dc converter for white led driver the TCA62753FUG is a charge pump type dc/dc converter specially designed for constant current driving of white led. this ic can outputs led current 100ma or more to 3.0-5.5v input. this ic is especially for driving back light white leds in lcd of pda, cellular phone, or handy terminal equipment. this ic is pb-free product. features ~ input voltage : v in =2.7v to 5.5v ~ output current (v out =5v) : 100ma (v in =3.0v or more) 50ma (v in =2.7v to 3.0v) ~ switching frequency : 1mhz(typ.) ~ integrated protection circuit : thermal shut down function output short circuit detection function output over voltage detection function ~ package : ssop6-p-0.95b weight: 0.016 g (typ.)
TCA62753FUG (ver04)2005-11-10 2 tentative pin assignment (top view) explanation of the terminal no. symbol function c- capacitance connection terminal for charge pump. v in power supply terminal. c+ capacitance connection terminal for charge pump. v out output terminal. gnd gnd terminal. shdn logic input terminal. (input a chip enable signal) shdn = ?h? operation mode, shdn = ?l? shutdown mode block diagram c- vin c+ shdn gnd vout 1 2 3 6 5 4 z control circuit v ref step up control circuit c- c+ vout gnd vin shdn 4 5 6 1 2 3
TCA62753FUG (ver04)2005-11-10 3 tentative absolute maximum ratings (t a =25c) characteristics symbol ratings unit power supply voltage v in ? 0.3 to +6.0 v input voltage v shdn ? 0.3~+v in + 0.3 *note1 v output voltage v out ? 0.3~ + 6.0 v 0.41(device) power dissipation p d 0.47(with pcb) *note2 w 300(device) thermal resistance r th (j-a) 260(with pcb) c/w operating temperature range t opr ? 40~ + 85 c storage temperature t stg ? 55~ + 150 c maximum junction temperature t j 150 c note2: however, do not exceed 6v. note3: when every time the ambient temperature gets ov er 25c with 1c, the allowable loss must reduce 3.8mw/c more than maximum rated value. (when on pcb.) recommended operating condition ( unless otherwise specified, t a = ? 40~85c) characteristics symbol test circuit test conditions min. typ. max. unit power supply voltage v in - - 2.7 - 5.5 v capacitance for charge pump c - - - 1.0 - ma capacitance for input c in - - 1.0 2.2 10 f capacitance for output c out - - 1.0 2.2 10 f electrical characteristics (unl ess otherwise specified, v in = 3.6v, t a = 25c) characteristics symbol test conditions min. typ. max. unit power supply voltage v in - 2.7 - 5.5 v output voltage v out v in =2.7~3.0v, i out =50ma v in =3.0~5.0v, i out =100ma 4.8 5.0 5.2 v operating consumption current i in i out =0ma, v shdn =v in 8 ma v in =2.7~3.6v, i out =0ma, v shdn =0v - 0.01 1 quiescent consumption current i in v in =3.6~5.0v, i out =0ma, v shdn =0v - - 2.5 a shdn terminal h level input voltage v shdnh - 1.3 - v in v shdn terminal l level input voltage v shdnl - 0 - 0.3 v i shdnh v shdn =v in -1 - 1 shdn terminal current i shdnl v shdn =0v -1 1 a clock frequency f osc v shdn =3.6v - 1 - mhz short circuit current i sc v out =gnd, v shdn =3.6v - 250 - ma
TCA62753FUG (ver04)2005-11-10 4 tentative the example of application circuit *output this product outputs 5v(0.2v) from the terminal v out in input voltage v in =2.7v or more. in vin=2.7v~3.0v, it becomes 50ma or more. in vin=3.0v or more, it becomes 100ma or more. *thermal shutdown function the thermal shutdown circuit works when the junction temperature exceeds 150 ? (standard), and ic stops operating. (this function is not included in the product inspection.) *output short circuit detection function when the output do short-circuit, iout is limited to 250ma(standard). *output over voltage detection function the output is clamped so that vo ut should not become 6v or more even when the led load is opened. gnd shdn c+ vin c- 1 2 3 6 5 4 v in v out on/off c=1.0f c in =1.0f c out =1.0f vout
TCA62753FUG (ver04)2005-11-10 5 tentative package dimensions weight: 0.016 g (typ.)
TCA62753FUG (ver04)2005-11-10 6 tentative notes on contents block diagrams some functional blocks, circuits, or constants may be omitted or simplified in the block diagram for explanatory purposes. equivalent circuitry some parts of the equivalent circuitry may have been omitted or simplified for explanatory purposes. maximum ratings the absolute maximum ratings of a semiconductor devi ce are a set of specified parameter values that must not be exceeded during operation, even for an instant. if any of these ratings are exceeded during operat ion, the electrical characteri stics of the device may be irreparably altered and the reliability and lif etime of the device can no longer be guaranteed. moreover, any exceeding of the ratings during oper ation may cause breakdown, damage and/or degradation in other equipment. applications us ing the device should be designed so that no maximum rating will ever be exceeded under any operating conditions. before using, creating and/or producing designs, refer to and comply wi th the precautions an d conditions set forth in this document. application examples the application examples provided in this data sheet are provided for re ference only. thorough evaluation and testing should be implemented when desi gning your application's mass production design. in providing these application examples, toshiba does not grant the us e of any industrial property rights. handling of the ic ensure that the product is installed correctly to prevent breakdown, damage and/or degradation in the product or equipment. short circuiting between output and line to ground faults may result in damage to the ic. please exercise precaution in designing the output line, po wer line and gnd line so as to prevent such damage. be careful to insert the ic correctly. inserting the ic the wrong way (e.g., wrong direction) may result in damage to the ic. please exercise precaution in handling external components as shorti ng and opening such components may cause an overcurrent, which in turn may result in power overcurrent and/or in damage to the ic. overcurrent and thermal protection toshiba does not guarantee th at these protection func tions will prevent damage to the product. these functions are only intended as a temporary means of preventing output short circuiting and other abnormal conditions. if the guaranteed operating rang es of this product are ex ceeded, these protection fu nctions may not function as intended and this product might be damaged due to output short circuiting. the overcurrent protection functi on is intended to protect this product from temporary short circuiting only. short circuiting that last for a long time may cause excessive stress and damage to this product.
TCA62753FUG (ver04)2005-11-10 7 tentative
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