Rohm BA4908 System regulator for car stereo Datasheet

03W201A
System Regulator for Car Stereo
BA4908
Description
BA4908 is a system regulator IC for car stereo.
This IC incorporates 1 channel of 5.6V output,
2 channels of 8.7V output and 2 channels of
high side switch.
Dimension (Unit : mm)
29.8 ± 0.2
Power dissipation
Pd
Limits
Unit
24
3000 ∗
mW
Operating temperature range
Topr
-30
~
Storage temperature range
Tstg
-55
~
V
+85
+150
˚C
˚C
∗Derating : 27.2mW/˚C for operation above Ta=25˚C
Recommended Operating Conditions (Ta=25˚C)
Parameter
Symbol
Recommended supply voltage
Vcc
Min.
Typ.
Max.
Unit
10
13.2
16
V
Operating voltage range
6.3
13.2
24
V
Vcc
∗Electric characteristic is not guaranteed. (Especially at low input voltage)
13.9 ± 0.3
1.2
21.6 ± 0.5
Power supply voltage
1
12
0.6
1.2
SIP-M12
Absolute Maximum Ratings (Ta=25˚C)
Vcc
R1.8
2.54
Applications
Car stereo
Symbol
6.5 ± 0.5 7.0 ± 0.1 6.9 ± 0.1
Features
1) PNP output and low drop out type (Except AMP and ANT)
2) Built-in output current limit 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) 12 pin power package perfect for space saving design
5) Built-in thermal protection circuit to protect IC from
thermal destruction
Parameter
4.7 ± 0.2
24.0 ± 0.1
0.4 ± 0.1
Electrical characteristics (Unless otherwise noted: Ta=25˚C, Vcc=13.2V)
Parameter
Symbol
Min.
Typ.
Max.
Unit
IST
-
0.55
0.80
mA
VO1
5.30
5.60
5.90
V
∆VO13
0.3
200
0.7
-
V
mA
Circuit current at standby
Output voltage(VDD)1
Conditions
STAN BY pin = 0V
IO1=80mA
IO1=80mA
Output current capacity
IO1
100
Output voltage(COM)2
VO2
8.25
8.70
9.15
V
IO2=120mA
∆VO23
150
0.4
300
0.7
-
V
mA
IO2=120mA
IO2
∆VO31
-
1.0
1.5
V
IO3=400mA
IO3
500
900
-
mA
VO3≥11.7V
∆VO41
IO4
500
1.0
900
1.5
-
V
mA
IO4=400mA
VO4≥11.7V
VO5
∆VO53
5.3
150
5.6
0.4
300
5.9
0.7
-
V
V
mA
IO5=50mA
IO5=120mA
8.25
250
8.70
0.4
500
9.15
0.7
-
V
V
mA
IO6=140mA
IO6=200mA
Minimum I/O voltage difference
Minimum I/O voltage difference
Output current capacity
I/O voltage difference(AMP)3
Output current capacity
I/O voltage difference(ANT)4
Output current capacity
Output voltage(TUNER5.6)5
Minimum I/O voltage difference
Output current capacity
Output voltage(TUNER8.7)6
Minimum I/O voltage difference
IO5
VO6
∆VO63
Output current capacity
IO6
∗ This product is not designed for protection against radioactive rays.
∗ Output current capacity must be set below MINIMUM of the specification.
VO1≥5.3V
VO2≥8.25V
VO5≥5.3V
VO6≥8.25V
Block Diagram
Regulator
Over voltage
protection
BA4908
1
2
3
N.C. TUNER TUNER
8.7
5.6
ANT SW SW
4
STB
5
VDD
5.6V
6
AMP
7
Vcc
8
ANT
9
10
11
COM TUNER TUNER
8.7V
5.6
8.7
12
GND
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document use silicon as a basic material.
Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level of
reliability and the malfunction of with would directly endanger human life (such as medical instruments,
transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other
safety devices), please be sure to consult with our sales representative in advance.
About Export Control Order in Japan
Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control
Order in Japan.
In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause)
on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.
Appendix1-Rev1.0
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