Document
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
ST 1 2 3 4 20 N.C. 19 OUT1 18 OUT2 17 OUT3 16 OUT4 15 OUT5 14 OUT6 13 OUT7 12 OUT8 11 VCC IN1
IN2
IN3
IN4
5
IN5
6
IN6
7
IN7
8
IN8
9
GND 10
1
Standard ICs
BA6212
•Absolute maximum ratings (Ta = 25°C)
Parameter Power supply voltage Power dissipation Operating temperature Storage temperature Maximum output current Maximum output voltage Maximum input voltage Symbol VCC Pd Topr Tstg IOUT VOUT VIN Limits 7 1100∗ – 25 ~ + 75 – 55 ~ + 125 400 14 VCC Unit V mW °C °C mA V V
•Internal circuit configuration
11 R1 7.3kΩ INPUT Q1 2~9 R2 6.6kΩ 1.2kΩ R3 Q3 OUT PUT 12 ~ 19 D1 R5 270Ω VCC
Q2 ST 1 R4 30kΩ R6 3kΩ
Q4
∗ Reduced by 11mW for each increase in Ta of 1°C over 25°C.
GND SUB 10
Fig. 1
•Electrical characteristics (unless otherwise noted, Ta = 25°C, V
Parameter Output saturation voltage 1 Output saturation voltage 2 Output leakage current 1 Output leakage current 2 Input current Input low level voltage Input high level voltage Symbol VOUT 1 VOUT 2 IOL 1 IOL 2 IIN VIL VIH Min. — — — — — — 3.6 Typ. 0.2 0.4 — — – 0.5 — — 0.3 0.6 100 100 –1 1 — V V
CC
= 5V)
Conditions IOUT = 200mA, VIN = 1V IOUT = 400mA, VIN = 1V VIN = 3.6V, VOUT = 12V VIN = 1V, VOUT = 12V, VST = 0.3V VIN = 0V, IOUT = 0mA — —
Max. Unit
µA µA mA V V
•Application example
+ 5V
Drive power supply 11 S.T. input 1 2 3 4 Input 5 6 7 8 9 19 18 17 Load
BA6212
16 15 14 13 12
10
Fig. 2
2
Standard ICs
BA6212
•Electrical characteristic curves
500 OUTPUT CURRENT: IOUT (mA / ch) INPUT CURRENT: IIN (µA) 400
– 600
16 VCC = 5V OUTPUT VOLTAGE: VOUT (V) 8
12
VCC = 5V
– 400
300
8
200 Ta = 75°C 100 Ta = 55°C
– 200
4
0 0
20
40
60
80
100
0 0
2
4
6
0 0
2
4
6
8
DUTY CYCLE: (%)
INPUT VOLTAGE: VIN (V)
INPUT VOLTAGE: VIN (V)
Fig. 3 Maximum output current when all channels are ON simultaneously
Fig. 4 Input current characteristics
Fig. 5 Input threshold voltage characteristics
10
OUTPUT VOLTAGE: VOUT (V)
8
6
4
2
0 0
0.2
0.4
0.6
0.8
1.0
STROBE INPUT VOLTAGE: VST (V)
Fig. 6 Strobe input characteristics
•External dimensions (Units: mm)
26.3 ± 0.3 20 11 6.5 ± 0.3 1 4.05 ± 0.3 0.51Min. 10 7.62
3.05 ± 0.2
0.3 ± 0.1
2.54
0.5 ± 0.1
0° ~ 15°
DIP20
3
.