|
ROHM Semiconductor |
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
IN1 2
IN2 3
IN3 4
IN4 5
IN5 6
IN6 7
IN7 8
IN8 9
GND 10
20 N.C.
19 OUT1
18 OUT2
17 OUT3
16 OUT4
15 OUT5
14 OUT6
13 OUT7
12 OUT8
11 VCC
1
Standard ICs
•Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol Limits
Unit
Power supply voltage
Power dissipation
VCC 7 V
Pd
1100∗
mW
Operating temperature
Topr – 25 ~ + 75 °C
Storage temperature
Tstg – 55 ~ + 125 °C
Maximum output current
IOUT
400 mA
Maximum output voltage
VOUT
14
V
Maximum input voltage VIN VCC V
∗ Reduced by 11mW for each increase in Ta of 1°C over 25°C.
BA6212
•Internal circuit configuration
R1
7.3kΩ
D1
INPUT
2~9
R2
6.6kΩ
Q1
1.2kΩ R3
R5 270Ω
Q3
11
VCC
OUT PUT
12 ~ 19
ST
1
Q2 Q4
R4
30kΩ
R6
3kΩ
SUB
GND
10
Fig. 1
•Electrical characteristics (unless otherwise noted, Ta = 25°C, VCC = 5V)
Parameter
Symbol Min. Typ. Max. Unit
Conditions
Output saturation voltage 1
VOUT 1 — 0.2 0.3 V IOUT = 200mA, VIN = 1V
Output saturation voltage 2
VOUT 2 — 0.4 0.6 V IOUT = 400mA, VIN = 1V
Output leakage current 1
IOL 1 — — 100 µA VIN = 3.6V, VOUT = 12V
Output leakage current 2
IOL 2 — — 100 µA VIN = 1V, VOUT = 12V, VST = 0.3V
Input current
IIN — – 0.5 – 1 mA VIN = 0V, IOUT = 0mA
Input low level voltage
VIL — — 1 V
—
Input high level voltage
VIH 3.6 — — V
—
•Application example
S.T. input
Input
1
2
3
4
5
6
7
8
9
+ 5V
11
BA6212
Drive power supply
19 Load
18
17
16
15
14
13
12
10
Fig. 2
2
|