Rainbow Electronics BA4911 User Manual
System regulator for car stereo
BA4911
03W202A
Description
BA4911 is a system regulator IC for car stereo.
This IC incorporates 1 channel of 5.0V output,
2 channels of 8.12V output, 1channel of 7.9V
output, 1channel of 10.3V output and 2 channels
of high side switch.
Features
1) PNP output and low drop out type
2) Built-in output current limits circuit to protect IC
from destruction by short
3) Built-in over-voltage protection circuit to deliver
strong design for surge input to BACK UP and Vcc
4) 12pin power package perfect for space saving design
5) Built-in thermal protection circuit to protect IC
from thermal destruction
6) Strong design against instant power failure of battery
because VDD can be driven by load stored in BACK UP
capacitor.
Applications
Car stereo
Absolute Maximum Ratings (Ta=25˚C)
Parameter Symbol
Power supply voltage
Power dissipation
Operating temperature range
Storage temperature range
Peak applied voltage
∗ Derating : 27.2mW/˚C for operation above Ta=25˚C
∗1 tr ≥ 1msec Applied time within 200msec
Vcc PEAK
Vcc
Pd
Topr
Tstg
Limits
36
3000
-
30
~
-
55
~
50
Dimension (Unit : mm)
Unit
V
+
+
∗
85
150
∗1
mW
˚C
˚C
V
29.8 ± 0.2
24.0 ± 0.1
6.9 ± 0.1
1.2
7.0 ± 0.1
21.6 ± 0.5
1
6.5 ± 0.5
2.54
4.7 ± 0.2
R
1
.8
13.9 ± 0.3
12
0.6
1.2
0.4 ± 0.1
SIP-M12
Recommended Operating Conditions (Ta=25˚C)
Parameter Min. Max. Unit ConditionsTyp.Symbol
Recommended supply voltage 1
Recommended supply voltage 2
Recommended supply voltage 3
∗Electric characteristic is not guaranteed. (Especially at low input voltage)
Vcc1
Vcc2
Vcc3
10
8.2
11.4
14.4
14.4 V
14.4 V
18
18
18
V
Except VDD output, ILM output
VDD output
ILM output
February, 2004
Electrical characteristics (Unless otherwise noted; Ta=25˚C, Vcc=14.4V)
Symbol Min. Max. Unit ConditionsTyp.Parameter
Standby circuit current 1 IST1
Standby circuit current 2 IST2
Output voltage (VDD) 1
Min. I/O voltage difference 1
Min. I/O voltage difference 2
Output current capacity
VO1 IO=300mA, Vcc=10~18V
∆VO1
∆VO1'
IO1
Output voltage (AUDIO) 2
Min. I/O voltage difference
Output current capacity
I/O voltage difference (P.COM) 3
∆VO2
IO2
∆VO3
Output current capacity
I/O voltage difference (P.ANT) 4
∆VO4
Output current capacity
Output voltage (AM) 5
Min. I/O voltage difference
Output current capacity
Output voltage (FM) 6
Min. I/O voltage difference
Output current capacity
Output voltage (ILM) 7
Min. I/O voltage difference
Output current capacity
*1 Design guaranteed
∗This product is not designed for protection against radioactive rays.
∗Output current capacity must be set below MINIMUM.
VO5
∆VO5
IO5
VO6
∆VO6
IO6
VO7
∆VO7
IO7
Block Diagram
SW1
SW2
GND
-
-
4.80
-
-
300
100
150
100 150 µA
5.00
0.4
2.5
-
5.20
0.7
3.0
-
7.80 8.12 8.30VO2
-
200
-
300
-
300
0.4
-
0.4 0.7
- -
0.4 0.7
- -
0.7
-
7.5 7.9 8.3
-
50
0.4
-
0.7
-
7.8 8.12 8.3
-
50
0.4
-
0.7
-
9.9 10.3 10.7
-
250
Vcc
Over voltage
7 9
protection
Thermal
shut down
10
11
1
0.4
-
Pre Reg.
Vref
Vbuf
4 State
3 State
0.7
-
µA
V
V
V
mA
V
V
mA
V
mAIO3
V
mAIO4
V
V
mA
V
V
mA
V
V
mA
Vcc
Vcc
Vcc
Vcc
Vcc
Vcc
Vcc
Vcc=13.2V
IO=300mA, VBU-VO1
IO=300mA, Vcc-VO1
VO1≥4.8V
IO2=200mA, Vcc=10~18V, -30°C~80°C
IO2=200mA, Vcc-VO2
VO2≥7.8V
IO3=200mA
VO3≥13.7V
IO4=200mA
VO4≥13.7V
IO5=50mA, Vcc=10~18V, -30°C~80°C
IO5=50mA
VO5≥7.5V
IO6=50mA, Vcc=10~18V, -30°C~80°C
IO6=50mA, Vcc-VO6
VO6≥7.8V
IO7=250mA, Vcc=10~18V
IO7=250mA, Vcc-VO7
VO7≥9.9V
VBU
VDD
8
AUDIO
6
P.CON
2
P.ANT
3
AM
5
FM
4
*1
*1
*1
BA4911
ILM
12
Loading...