bd4912 ROHM Co. Ltd., bd4912 Datasheet - Page 9

• Manufacturer Part Number: bd4912
• Description: Dmos System Power Supply Ics With Low Current Consumption Now Available
• Manufacturer: ROHM Co. Ltd.

I/O Equivalent circuit diagrams
Timing Chart
100k
200k
A U D IO （ 7 P IN ）
IL M （ 2 P IN ）
A M （ 5 P IN ）
V
D D
2, 5, 7, 9 PIN (ILM, AM, AUDIO, V
P IN
(9 P IN ）
3 PIN (P.ANT), 4 PIN (P.CON)
V
V
V
SEL1
ILM
P.COM
P.ANT
SEL2
AUDIO
SW 5V
AM
CC
CC
DD
GND
1
2
5k
0.29
Vcc1
V c c 1
V c c 1
V c c 1
V c c 2
GND
R1
R2
R3
V c c
Vcc
Fig.42
Fig.40
TSD ON
R 1 [Ω ]
0 .5 0
4 .0 0
0 .4 3
0 .2 5
1k
R 2 [k Ω ]
4 4 8 .5
4 4 5 .4
4 3 7 .7
3 8 1 .3
10k
1k
PIN
R 3 [k Ω ]
1 2 5 .0
6 1 .9
8 0 .7
7 8 .5
P.ANT(3PIN)
P.CON（4PIN）
10k
DD
)
Fig.44 Timing Chart
9/16
ＳＥＬ 1 （ 11PIN ）
SEL2(12PIN)
GND
1k
GND
1k
11 PIN (SEL1)
10k
12 PIN (SEL2)
Fig.41
122.7k
Fig.43
35.4k
41.9k
10k
122k
78k
1k
1k
1k
1k
1k