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AT1453 preliminary product information photoflash capacitor charger for dsc 2f, no.10, prosperity rd. ii, science-based industrial park, hsinchu 300,taiwan, r.o.c. tel: 886-3-563-0878 www: http://www.aimtron.com.tw fax: 886-3-563-0879 email: service@aimtron.com.tw 1 features ? 2.5 to 5.5v supply voltage operating range. ? low current consumption: 1ma in operation, ? 50 khz or 100khz operation frequency . ? built-in maximum duty control. ? push-pull output. ? built-in soft start circuit. ? built-in auto-discharge function. applications ?digital still cameras flash unit general description the AT1453 is a charger control ic for photoflash capacitor with soft start function, adjustable maximum duty cycle and auto-discharge circuit. adjustable soft start is programmed with an external capacitor on ss pin. it is ideal for dsc flash unit. block dia g ram out reference vcc gnd vref 1.1v fb duty enable block ready ss charge output control block aimtron reserves the right without notice to change this circuitry and specifications.
AT1453 preliminary product information photoflash capacitor charger for dsc 2f, no.10, prosperity rd. ii, science-based industrial park, hsinchu 300,taiwan, r.o.c. tel: 886-3-563-0878 www: http://www.aimtron.com.tw fax: 886-3-563-0879 email: service@aimtron.com.tw 2 pin configuration ordering information part number package remarks 8-pin plastic sop AT1453as AT1453a 8-pin plastic tssop AT1453ap 8-pin plastic sop AT1453bs AT1453b 8-pin plastic tssop AT1453bp a:50khz b:100khz pin description pin no. symbol i/o description 1 charge i charge enable input 2 fb i error amplifier input 3 duty i duty control input 4gnd - ground 5 out o push-pull output 6vcc - power supply 7 ready o charge ready open drain output 8 ss i soft-start setting
AT1453 preliminary product information photoflash capacitor charger for dsc 2f, no.10, prosperity rd. ii, science-based industrial park, hsinchu 300,taiwan, r.o.c. tel: 886-3-563-0878 www: http://www.aimtron.com.tw fax: 886-3-563-0879 email: service@aimtron.com.tw 3 absolute maximum ratings rated value parameter condition min. max. unit power supply voltage ? - +7 v source average current of out ? - -50 ma sink average current of out ? - 50 ma input voltage to error amplifier ? - 6.5 v tssop8 t a =+25 -450mw continuous power dissipation sop8 t a =+25 -500mw operating temperature ? -30 +85 0 c junction temperature ? - +125 0 c storage temperature ? -40 +150 0 c lead temperature ? - +300 0 c stresses beyond those listed under ?absolute maximum ratings? may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. recommended operating conditions (ta=+25 0 c) values parameter symbol min. typ. max. unit power supply voltage v cc 2.5 -- 5.5 operating temperature t op -30 +25 +85 c
AT1453 preliminary product information photoflash capacitor charger for dsc 2f, no.10, prosperity rd. ii, science-based industrial park, hsinchu 300,taiwan, r.o.c. tel: 886-3-563-0878 www: http://www.aimtron.com.tw fax: 886-3-563-0879 email: service@aimtron.com.tw 4 electrical characteristics (vcc = 3.3v,t a =+25 , unless otherwise noted.) values parameter symbol condition min. typ. max. unit input supply range v cc 2.5 -- 5.5 v feedback voltage v fb 1.089 1.1 1.111 v feedback voltage line-regulation v fb-line vcc=2.5v to 5.5v -15mv feedback variation with temperature t a =-30 to +85 -0.55 % standby current i ccs chrge=gnd --400 a entire device operating current i cc duty=50%, f osc =50khz -1.0-ma a 40 50 60 khz oscillator frequency fosc b 90 100 110 khz threshold voltage of ss v ss_0 duty cycle=0% -0.3- v threshold voltage of ss v ss 100 duty cycle=100% -1.1- v charging current i ss v ss =0v -1.0- a soft-start and duty section maximum duty cycle t duty -- -- 90 % output source current i source duty R9 5%, out=0v - -130 -80 ma output sink current i sink duty Q 5%, out=5v 65 100 - ma output on resistor r oh out = -15ma -1830 output section output off resistor r ol out = 15ma -1625 active mode threshold v onh 2.0 v charge on/off section disable mode threshold v onl 0.8 v
AT1453 preliminary product information photoflash capacitor charger for dsc 2f, no.10, prosperity rd. ii, science-based industrial park, hsinchu 300,taiwan, r.o.c. tel: 886-3-563-0878 www: http://www.aimtron.com.tw fax: 886-3-563-0879 email: service@aimtron.com.tw 5 timing chart AT1453 charge toggling refresh mode
AT1453 preliminary product information photoflash capacitor charger for dsc 2f, no.10, prosperity rd. ii, science-based industrial park, hsinchu 300,taiwan, r.o.c. tel: 886-3-563-0878 www: http://www.aimtron.com.tw fax: 886-3-563-0879 email: service@aimtron.com.tw 6 duty setting the duty resistor selection depends on duty cycle , choose the component using the following equation: example : set duty cycle is 50% 15 . 1 3 . 0 ) ( duty v v duty + = 073 . 1 ) 1 . 1 ( 15 ) ( ? = ? duty duty v k r 734 . 0 15 . 1 5 . 0 3 . 0 = + = duty v ? ? = k r duty 2 . 35 073 . 1 ) 734 . 0 1 . 1 ( 15
AT1453 preliminary product information photoflash capacitor charger for dsc 2f, no.10, prosperity rd. ii, science-based industrial park, hsinchu 300,taiwan, r.o.c. tel: 886-3-563-0878 www: http://www.aimtron.com.tw fax: 886-3-563-0879 email: service@aimtron.com.tw 7 typical application schematic (a) igbt trigger
AT1453 preliminary product information photoflash capacitor charger for dsc 2f, no.10, prosperity rd. ii, science-based industrial park, hsinchu 300,taiwan, r.o.c. tel: 886-3-563-0878 www: http://www.aimtron.com.tw fax: 886-3-563-0879 email: service@aimtron.com.tw 8 (b)scr trigger
AT1453 preliminary product information photoflash capacitor charger for dsc 2f, no.10, prosperity rd. ii, science-based industrial park, hsinchu 300,taiwan, r.o.c. tel: 886-3-563-0878 www: http://www.aimtron.com.tw fax: 886-3-563-0879 email: service@aimtron.com.tw 9 (c)
AT1453 preliminary product information photoflash capacitor charger for dsc 2f, no.10, prosperity rd. ii, science-based industrial park, hsinchu 300,taiwan, r.o.c. tel: 886-3-563-0878 www: http://www.aimtron.com.tw fax: 886-3-563-0879 email: service@aimtron.com.tw 10 ch1:ready ch2: charge ch3:i bat ch4:vout(290v) fig1. vcc=3.0v vbat=3.0v fig2. vcc=3.0v vbat=2.5v
AT1453 preliminary product information photoflash capacitor charger for dsc 2f, no.10, prosperity rd. ii, science-based industrial park, hsinchu 300,taiwan, r.o.c. tel: 886-3-563-0878 www: http://www.aimtron.com.tw fax: 886-3-563-0879 email: service@aimtron.com.tw 11 fig3. vcc=3.0v vbat=2.0v
AT1453 preliminary product information photoflash capacitor charger for dsc 2f, no.10, prosperity rd. ii, science-based industrial park, hsinchu 300,taiwan, r.o.c. tel: 886-3-563-0878 www: http://www.aimtron.com.tw fax: 886-3-563-0879 email: service@aimtron.com.tw 12 small outline 8-pin plastic sol inches millimeters symbol min max min max notes a 0.188 0.197 4.80 5.00 - b 0.149 0.158 3.80 4.00 - c 0.228 0.244 5.80 6.20 - d 0.050 bsc 1.27 bsc - e 0.013 0.020 0.33 0.51 - f 0.004 0.010 0.10 0.25 - h 0.053 0.069 1.35 1.75 - j 0.011 0.019 0.28 0.48 k 0.007 0.010 0.19 0.25 - m 0.016 0.050 0.40 1.27 l 0.150 ref 3.81 ref - e1 45 0 45 0 - 0 0 8 0 0 0 8 0 -
AT1453 preliminary product information photoflash capacitor charger for dsc 2f, no.10, prosperity rd. ii, science-based industrial park, hsinchu 300,taiwan, r.o.c. tel: 886-3-563-0878 www: http://www.aimtron.com.tw fax: 886-3-563-0879 email: service@aimtron.com.tw 13 small outline 8-pin tssop inches millimeters symbol min max min max notes a 0.114 0.122 2.90 3.10 - b 0.169 0.177 4.30 4.50 - c 0.244 0.260 6.20 6.60 - d 0.026 bsc 0.65 bsc - e 0.010 0.012 0.25 0.30 - f 0.002 0.006 0.05 0.15 - h 0.041 0.047 1.05 1.20 - k 0.005 bsc 0.127 bsc - m 0.020 0.028 0.50 0.70 0 0 8 0 0 0 8 0 -
AT1453 preliminary product information photoflash capacitor charger for dsc 2f, no.10, prosperity rd. ii, science-based industrial park, hsinchu 300,taiwan, r.o.c. tel: 886-3-563-0878 www: http://www.aimtron.com.tw fax: 886-3-563-0879 email: service@aimtron.com.tw 14 reflow condition (ir/co nvection or vpr reflow) reference jedec standard j-std-020a classification reflow profiles convection or ir/convction vpr average heating rate(180 c to peak) 5 c/second max. 10 c/second max. preheat temperature(125 20 c) 120 seconds max. temperature maintained above 180 c 10~150 seconds time within 5 c of actual peak temperature 10~20 seconds 60 seconds peak temperature range(note 1) 219~225 c or 235~240 c 219~225 c or 235~240 c cooling rate 6 c /second max. 10 c/second max. time 25 c to peak temperature 6 minutes max. *1 the maximum peak temperatures for ir and vp reflow are depending on package dimensions. package reflow conditions pkg. thickness 2.5mm and all bags pkg. thickness <2.5mm and pkg. volume 350 mm 3 pkg. thickness <2.5mm and pkg. volume <350 mm 3 convection 219~225 c convection 235~240 c vpr 219~225 c vpr 235~240 c ir/convection 219~225 c ir/convection 235~240 c

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