1 standard ics 8-channel high current driver BA6212 the BA6212 is a monolithic ic including 8 circuits and capable of high current drive. capable of using a current as high as 400ma, it has a strobe pin, and is thus ideal for use as a driver circuit in thermal printers. its input can be directly coupled to cmos devices. applications thermal printers motors relays leds and other drivers features 1) high current drive capability of 400ma (max). 2) 8 circuits included. 3) equipped with a strobe pin. 4) easy installation due to inputs and outputs being aligned in the same direction. 5) input can be directly connected to cmos devices. block diagram 1 2 3 4 5 6 7 8 9 10 20 st in1 in2 in3 in4 in5 in6 in7 in8 gnd n.c. out1 out2 out3 out4 out5 out6 out7 out8 v cc 19 18 17 16 15 14 13 12 11
2 standard ics BA6212 absolute maximum ratings (ta = 25?) parameter symbol limits unit power supply voltage v cc 7v power dissipation pd mw operating temperature topr c storage temperature tstg c maximum output current i out 400 ma maximum output voltage v out 14 v maximum input voltage v in v cc v 1100 * * reduced by 11mw for each increase in ta of 1 c over 25 c. ? 25 ~ + 75 ? 55 ~ + 125 internal circuit configuration v cc out put gnd 12 ~ 19 10 11 sub q 4 q 2 q 3 q 1 1 r 4 r 3 r 5 r 2 r 1 7.3k w 270 w r 6 30k w 3k w d 1 input 6.6k w 2 ~ 9 st 1.2k w fig. 1 electrical characteristics (unless otherwise noted, ta = 25?, v cc = 5v) parameter symbol min. typ. max. unit conditions output saturation voltage 1 0.2 0.3 v i out = 200ma, v in = 1v output saturation voltage 2 0.4 0.6 v i out = 400ma, v in = 1v output leakage current 1 100 m av in = 3.6v, v out = 12v output leakage current 2 100 m av in = 1v, v out = 12v, v st = 0.3v input current ? 0.5 ? 1mav in = 0v, i out = 0ma input low level voltage 1v input high level voltage v out 1 v out 2 i ol 1 i ol 2 i in v il v ih 3.6 v application example drive power supply BA6212 load + 5v 11 1 2 3 5 6 7 8 9 4 19 18 10 16 15 14 13 12 17 input s.t. input fig. 2
3 standard ics BA6212 500 400 300 200 100 0 020406080100 duty cycle: (%) output current: i out (ma / ch) ta = 75 c ta = 55 c fig. 3 maximum output current when all channels are on simultaneously electrical characteristic curves dip20 10 11 1 20 6.5 0.3 26.3 0.3 0.5 0.1 0.51min. 4.05 0.3 3.05 0.2 7.62 0 ~ 15 2.54 0.3 0.1 external dimensions (units: mm) 600 400 200 0 02468 input voltage: v in ( v ) input current: i in ( m a) v cc = 5v fig. 4 input current characteristics 16 12 8 4 0 02 468 input voltage: v in ( v ) output voltage: v out ( v ) v cc = 5v fig. 5 input threshold voltage characteristics 10 8 6 4 2 0 0 0.2 0.4 0.6 0.8 1.0 strobe input voltage: v st ( v ) output voltage: v out ( v ) fig. 6 strobe input characteristics
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