NJM2337 battery charger ic general description the NJM2337 is a voltage and current control ic which contains precision voltage reference. it is suitable for battery charger, second controller of switching regulator systems, and other battery systems. package outline NJM2337af/bf/cf features operating voltage 2.2v to 1 3v internal precision voltage reference 1 .24v 1 % pc terminal current 20ma max. operating current 280a max. bipolar technology package outline mtp6 pin configuration pin function 1 : a -input 2 : gnd 3 : b +input 4 : v + 5 : pc 6 : a +input v ref(b) 1 2 3 6 5 4 r fb v ref(a) a + b + - -
NJM2337 abusolute maximum ratings (ta=25c) parameter symbol ratings unit supply voltage v + + 1 4 v differential input voltage v id (ach) 1 4v (bch) 1 4v v power dissipation p d 200 mw pc terminal current i pc 20 ma operating temperature range topr -40 to +85 c storage temperature range tstg -50 to + 1 50 c recommended operating conditions parameter symbol ratings unit operating voltage vopr 2.2 to 1 3 v electrical characteristics (v + =5v, ta=25c) parameter symbol conditions min. typ. max. unit operating current i cc i pc =off - 200 280 a leakage current i pcleak v + =v pc = 1 3v - - 1 a saturation voltage v pc(sat) i pc =20ma - 0. 1 0.3 v feedback resistance r fb 0.7 1 .0 1 .3 ? [ach] parameter symbol conditions min. typ. max. unit a version 69 72 75 mv b version 1 05 1 09 11 3 mv reference voltage v ref(a) c version 1 45 1 5 1 1 57 mv input bias current i b - 40 1 60 na large signal voltage gain a v - 80 - db input common mode voltage range v icm - -0.2 to 3.0 - v common mode rejection ratio cmr - 70 - db supply voltage rejection ratio svr - 80 - db slew rate sr - 0.5 - v/s gain bandwidth product gb f= 1 0khz - 1 - mhz [bch] parameter symbol conditions min. typ. max. unit reference voltage v ref(b) 1 227 1 240 1 253 mv input bias current i b - 20 80 na large signal voltage gain a v - 80 - db input common mode voltage range v icm - 0.5 to 4.0 - v common mode rejection ratio cmr - 80 - db supply voltage rejection ratio svr - 80 - db slew rate sr - 0.5 - v/s gain bandwidth product gb f= 1 0khz - 1 - mhz
NJM2337 typical application ? ? ? ? typical application1 ? ? ? ? typical application2 control ic pc ? ? ? ? + + ? ? ? ? v ref(b) battery pc NJM2337a/b/c 5 1 6 2 3 4 a b r sc + v i r 1 r2 v ref(a) r fb r 1 + r2 vout = v ref( b ) r2 (v) v ref( a ) current limit = rsc ( a ) v ref(a) control pc ? ? ? ? + + + + + + + + ? ? ? ? v ref(b) battery pc NJM2337a/b/c 5 1 6 2 3 4 a b r sc + v i r 1 r2 r fb v ref(a) current limit= rsc (a) output= { v ref ( b ) + ( i l r sc ) } r 1 +r2 r2 ? ( i l r sc ) ( v )
NJM2337 typical characteristics ach voltage gain , phase vs. frequency characteristic ( v+=5v ,ta=25c ) -50 -30 - 1 0 1 0 30 50 1 00 1 ,000 1 0,000 1 00,000 1 ,000,000 1 0,000,000 frequency hz voltage gain db -225 - 1 80 - 1 35 -90 -45 0 45 90 1 35 1 80 225 voltagephase (deg) db phase bch voltage gain , phase vs. frequency characteristic ( v+ =5 v ,ta =2 5 c ) -50 -40 -30 -20 - 1 0 0 1 0 20 30 40 50 1 00 1 ,000 1 0,000 1 00,000 1 ,000,000 1 0,000,000 frequency hz voltage gain db -225 - 1 80 - 1 35 -90 -45 0 45 90 1 35 1 80 225 voltagephase (deg) db phase supply current(icc) vs. supply voltage(vcc) 0 50 1 00 1 50 200 250 300 0246 8 1 0 1 2 1 4 vcc (v) icc (ua) supply current(icc) vs. temperature 0 50 1 00 1 50 200 250 300 -40-200 20406080 ambient temperature (c) icc (ua) vcc= 1 3v vcc=5v input bias current 0 1 0 20 30 40 50 60 70 -40-20 0 20406080 ambient temperature (c) input bias current na ach bch
NJM2337 voltage reference (a version) 68 69 70 7 1 72 73 74 -40 1 060 ambient temperature (c) vref (a) mv voltage reference (b version) 1 05 1 06 1 07 1 08 1 09 11 0 111 11 2 -40 1 060 ambient temperature (c) vref ( a ) mv voltage reference (c version) 1 47 1 48 1 49 1 50 1 5 1 1 52 1 53 1 54 -40 1 060 ambient temperature(c) vref ( a ) mv saturation voltage vs. output current (ach.) 0.0 0.2 0.4 05 1 0 1 52025303540 output current (ma) saturation voltage (v) saturation voltage vs. output current (bch) 0.0 0.2 0.4 05 1 0 1 52025303540 output current (ma) saturation voltage (v)
NJM2337 the specifications on this data book are only given for information, without any guarantee as regards eithe r mistakes or omissions. the application circuit in this dat a b ook are described only to show representative usages o f the product and not intended for the guarantee o r permission of any right including the industrial rights. amp.gain vs. ambient temperature ( bch ) 60 70 80 90 1 00 11 0 1 20 -40-20 0 20406080 ambient temperature (c) db av svr+ svr- cmr amp.gain vs. ambient temperature ( ach ) 60 70 80 90 1 00 11 0 1 20 -40-200 20406080 ambient temperature (c) db av svr+ svr- cmr input common mode voltage range vs. ambient temperature (ach) vcc=5v -1.0 0.0 1.0 2.0 3.0 4.0 5.0 -40 10 60 ambient temperature (c) vicm v vicm- vicm+ input common mode voltage range vs. ambient temperature (bch) vcc=5v -1.0 0.0 1.0 2.0 3.0 4.0 5.0 -40 10 60 ambient temperature (c) vicm v \ vicm- vicm+
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