ROHM BA612 Datasheet
1
Standard ICs
5-channel high current driver
BA612
The BA612 is a high-current driver IC, and contains an array of five Darlington transistors, each with input resistance.
Input and output can be directed in the same direction using DIP Pin 14, with the layout optimized to facilitate mounting.
•
Applications
Hammer solenoid drivers
Relay drivers
LED drivers
•
Features
1) 5-circuit Darlington transistor array.
2) Large current (up to 400mA) can be driven.
3) Input and output pins are aligned in the same direc-
tion, for easy mounting.
4) High current transfer ratio.
5) Can be coupled with MOS ICs.
•
Block diagram
1
N.C.
2
IN1
3
IN2
4
IN3
5
IN4
6
IN5
7
14
13
12
11
10
9
8
GND
N.C.
OUT1
OUT2
OUT3
OUT4
OUT5
Sub
N.C.
2
Standard ICs BA612
•
Absolute maximum ratings (Ta = 25°C)
Parameter Symbol Limits Unit
Power supply voltage V
CC 24 V
Power dissipation 550
∗
mW
Operating temperature Topr – 25 ~ + 75 °C
Storage temperature Tstg – 55 ~ + 125 °C
Collector current I
C 450 mA
Input pin voltage withstanding ( + ) V
IN + 24 V
Input pin voltage withstanding ( – ) V
IN – – 0.5 V
Pd
∗
Reduced by 5.5mW for each increase in Ta of 1°C over 25°C
•
Internal circuit configuration
R3
R2
R1
2
13
R3
R2
R1 = 25kΩ R2 = 25kΩ R3 = 2kΩ
R
1
3
12
Q4
Q3
R3
R2
R1
4
11
Q6
Q5
R3
R2
R1
5
10
Q8
Q7
R3
R2
R1
6
9
7
Q10
Q9
Q2
Q1
Fig.1
•
Electrical characteristics (unless otherwise noted, Ta = 25°C)
Parameter Symbol Min. Typ. Max. Unit Conditions
Measurement
circuit
Usage voltage range VCC — — 20 V — —
Output leakage current I
L — — 100 µAVCC = 26V, VIN = 0V Fig.10
Output current (1 circuit) I
OUT — — 400 mA When only 1 circuit is on Fig.11
Output current (5 circuits) I
OUT Fig.3 — DC per circuit when all 5 circuits are on at once —
Collector saturation voltage — — 2.0 V I
OUT = 400mA, VIN = 17V Fig.11
DC current transfer ratio h
FE 2000 — — — — —
Input current I
IN — 0.6 1.0 mA VIN = 17V, IOUT = 0mA Fig.11
V
CE (sat)
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