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| Datasheet File OCR Text: |
| Standard ICs 7-channel high current driver BA6257 The BA6257 is a printer hammer solenoid driver for electronic calculators. It consists of seven circuits and is provided with a high input impedance in order to enable direct drive from MOS ICs. It features a built-in clamp diode and 16-pin DIP for easy installation. *Applications drivers Hammer solenoid Relay drivers LED drivers *Features Darlington transistor array. 1) 7-channel 2) High current driver capability of 100mA. 3) Can be directly connected to MOS IC devices. 4) High withstanding voltage of 38V for input and 24V for output. 5) Built-in clamp diode for driving inductive loads. *Block diagram IN1 1 16 OUT1 IN2 2 15 OUT2 IN3 3 14 OUT3 IN4 4 13 OUT4 IN5 5 12 OUT5 IN6 6 11 OUT6 IN7 7 10 OUT7 GND 8 BA6257 9 VCC 1 Standard ICs BA6257 *Internal circuit configuration 16 1 D1 R1 Q1 Q2 R2 R3 R2 R3 2 D2 R1 Q3 15 14 13 12 11 10 9 3 D3 R1 Q5 Q4 R2 R3 Q6 4 D4 R1 Q7 Q8 R2 R3 5 D5 R1 Q9 Q10 R2 R3 6 D6 R1 Q11 Q12 R2 R3 7 D7 R1 Q13 Q14 R2 R3 8 R1 = 25k R2 = 25k R3 = 2k Fig.1 *Absolute maximum ratings (Ta = 25C) Parameter Power supply voltage Power dissipation Operating temperature Storage temperature Collector current Input voltage Symbol VCC Pd Topr Tstg IC VIN Limits 24 500 - 25 ~ + 75 - 55 ~ + 125 100 - 0.5 ~ + 38 Unit V mW C C mA V Reduced by 5mW for each increase in Ta of 1C over 25C. *Electrical characteristics (unless otherwise noted, Ta = 25C, VCC = 20V) Parameter Usage voltage range (output) Output leakage current Collector saturation voltage 1 Collector saturation voltage 2 Input current Diode leakage current Diode forward voltage Symbol VCC IL VCE (sat) 1 VCE (sat) 2 IIN IR VIN Min. -- -- -- -- -- -- -- Typ. -- -- 1.4 -- 0.6 -- 1.2 Max. 20 100 2.2 2.2 1.4 100 -- Unit V A V V mA A V Conditions -- VC = 20V, VIN = 0V IOUT = 75mA, VIN = 17V IOUT = 75mA, VIN = 8V IOUT = 0mA, VIN = 17V VR = 20V IF = 75mA Fig.2 Fig.3 Fig.3 Fig.4 Fig.5 Fig.6 Measurement circuit *Measurement circuits 9 A IN 1 Unit V 8 8 OUT IN 1 Unit I OUT V VCE (sat) OUT 9 Fig.2 Fig.3 2 Standard ICs IR A 9 9 IIN A IN OUT 1 Unit IN 1 Unit VIN 8 8 OUT BA6257 Fig.4 9 IN 1 Unit V VF 8 OUT IF Fig.5 Fig.6 *Electrical characteristic curve MAXIMUM OUTPUT CURRENT : IOUT (mA) 120 100 80 7 circuits operating simultaneously Ta = 75C max. VIN = 20V 60 40 20 0 0 20 40 60 80 100 DUTY CYCLE (%) Fig.7 Output current vs. duty cycle *External dimensions (Units: mm) 19.4 0.3 16 9 6.5 0.3 0.51Min. 1 8 7.62 3.2 0.2 4.25 0.3 0.3 0.1 2.54 0.5 0.1 0 ~ 15 DIP16 3 |
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