Sony BVW-55 Maintenance Manual page 618

IC
LTC1473CGN-E2 (LINEAR TECH)
DUAL POWER PATH SWITCH DRIVER
—TOP VIEW—
IN1 1 16 GA1
IN2 2 15 SAB1
DIODE
3 14 GB1
TIMER 4 13 SENSE+
V+ 5 12 SENSE_
V 6 11 GA2
GG
SW 7 10 SAB2
GND 8 9 GB2
INPUTS
DIODE
: 2-DIODE MODE
IN1 : LOGIC INPUT OF GATE DRIVERS GA1 AND GB1
IN2 : LOGIC INPUT OF GATE DRIVERS GA2 AND GB2
SENSE+, SENSE_ : INRUSH CURRENT
SW : OPEN DRAIN OF N-CHANNEL MOSFET SWITCH
TIMER : FAULT TIMER
OUTPUTS
GA1, GA2, : SWITCH GATE DRIVER
GB1, GB2
SAB1, SAB2 : SOURCE RETURN
1
IN1
2
IN2
3
DIODE
V+
5 uA
4
TIMER
TO
GATE
DRIVERS
6
V
GG
7
SW
SWITCHING
REGULATOR
2-68
SW A1/B1
GATE
DRIVERS
INRUSH
CURRENT
SENSE
SW A2/B2
GATE
DRIVERS
R
LATCH
+
S
_
1.20 V
V
GG
M48T18-100MH1TR (SGS)
C-MOS 64 K (8,184 x 8)-BIT NON-VOLATILE SRAM AND REAL TIME CLOCK
—TOP VIEW—
INT
1 V
DD
A12 2
A7 3
A6 4
A5 5
A4 6
A3 7
A2 8
A1 9
A0 10
DQ0
11
DQ1 12
DQ2 13
GND
14
16
GA1
15
SAB1
MAX202CSE (MAXIM)
14
GB1
MAX202CSE-T
13
RS-232 TRANSMITTER/RECEIVER
SENSE+
12
—TOP VIEW—
SENSE_
11
C1+ 1
GA2
10
V+ 2
SAB2
9
C1_ 3
GB2
C2+ 4
C2_ 5
V_ 6
T2 7
OUT
R2 8
IN
1
+
0.1 µF
3
+
4
0.1 µF
5
11
TTL/CMOS
INPUTS
10
12
TTL/CMOS
OUTPUTS
9
M4T28-BR12SH1
TOP HAT
28
OSCILLATOR
W
27
AND
CLOCK CHAIN
26 E2
32,768 Hz
CRYSTAL
25 A8
A9
24
LITHIUM
23 A11 VOLTAGE SENSE
CELL POK
AND
SWITCHING
G
22
CIRCUITRY
A10
21
E1
20
28 1
19 DQ7
INT
V
DD
18 DQ6
17 DQ5 A0 - A12 : ADDRESS INPUTS
DQ0 - DQ7 : DATA INPUTS/OUTPUTS
INT
16 DQ4 : POWER FAIL INTERRUPT
E1
: CHIP ENABLE 1
15 DQ3 E2 : CHIP ENABLE 2
G
: OUTPUT ENABLE
W
: WRITE ENABLE
1 2
C1+ V+
V 16
CC
3
C1_
4 6
C2+ V_
15
GND
5
C2_
14 T1
OUT
11 14
T1 T1
10 7
T2 T2
13 R1
IN
13 12
R1 R1
12 R1
OUT
8 9
R2 R2
11 T1
IN
R1, 2 : RECEIVER 1, 2
T1, 2 : TRANSMITTER 1, 2
10 T2
IN
9 R2
OUT
+5 V 0.1 µF
0.1 µF INPUT 6.3 V
+ +
16
2 +10 V
+5V to +10V
VOLTAGE DOUBLER
_10 V
+10V to _10V
VOLTAGE INVERTER 6
0.1 µF
16 V
+
+5 V
400 K
14
T1
+5 V
RS-232
OUTPUTS
400 K
7
T2
13
R1
5 K
RS-232
INPUTS
8
R2
5 K
15
M48T18-100MH1TR
8 x 8
BIPORT
SRAM ARRAY
2 - 10, 23 - 25
A0 - A12
8184 x 8
11 - 13, 15 - 19
SRAM ARRAY
DQ0 - DQ7
20
E1
26
E2
27
W
22
G
14
GND
BVW-55