Sony SIU-100 Service Manual page 84

IC
PGA2310UA/1K (BURR-BROWN)
STEREO AUDIO VOLUME CONTROL
—TOP VIEW—
ZCEN 1 16
IN
CS
2 15
IN
SDI 3 14
IN
DV 4 13
CC
DGND 5 12
SCLK 6 11
IN
SDO 7 10
OUT
MUTE
8 9
IN
16
V L
IN
MUX
8
15
AGNDL
10
AGNDR
8
MUX
9
V R
IN
TPS54310PWPR (TI)
SYNCHRONOUS BUCK PWM SWITCHER
—TOP VIEW—
AGND 1
VSENSE 2
IN
COMP 3
OUT
PWRGD 4
OUT
BOOT 5
IN
PH 6
I/O
PH 7
I/O
PH 8
I/O
PH 9
I/O
PH 10
I/O
V
IN
ENABLE
COMP.
18
SS/ENA
FALLING EDGE
0.8 V
T SUNT
V UVLO BIAS UVLO
IN
COMP. BG GOOD
V
IN
DELAY
V UVLO
IN
OFFSET
MUX
2
VSENSE
4-6
INPUTS
CS
: CHIP SELECT
V L
IN IN
MUTE
: MUTE CONTROL
SDI : SERIAL DATA
AGNDL
SCLK : SERIAL CLOCK
V L, V R : L/R CH ANALOG
IN IN
V L
OUT OUT
ZCEN : ZERO-CROSS ENABLE
AV
CC
OUTPUTS
SDO : SERIAL DATA
AV
CC
V L, V R
: L/R CH ANALOG
OUT OUT
V R
OUT OUT
AGNDR
V R
IN IN
+
14
V L
OUT
_
8
MUTE
8
1
ZCEN
2
CS
SERIAL
6
CONTROL SCLK
3
PORT
SDI
7
SDO
8
_
11
V R
OUT
+
INPUTS
BOOT : BOOTSTRAP
20 RT
IN
RT : FREQUENCY SETTING RESISTOR
SYNC : SYNCHRONIZATION
19 SYNC
IN
VSENSE : ERROR AMPLIFIER INVERTING
18 SS/ENA
I/O
OUTPUTS
COMP : ERROR AMPLIFIER
17 VBIAS
OUT
PWRGD : POWER GOOD (OPEN DRAIN)
VBIAS : INTERNAL BIAS REGULATOR
16 V
IN
INPUTS/OUTPUTS
15 V
IN
PH : PHASE
SS/ENA : SLOW-START/ENABLE
14 V
IN
OTHERS
13 PGND
AGND : ANALOG GROUND
PGND : POWER GROUND
12 PGND
V : POWER SUPPLY
IN
11 PGND
SHUTDOWN
RISING EDGE
DELAY
DELAY
1 - 4 us
SS DIS
RISING EDGE
DELAY
REF/DAC
PWM
ERROR
COMP.
+ AMP.
_
OSC.
3
+
COMP
C
T
19 I
SET
SYNC
20
RT
POWER GOOD
1
COMP.
AGND
VSENSE
V
PGD
HIGH
DR
VBIAS
HIGH
IN
UVLO REG.
UVLO
SAMPLING
VPHASE
LOGIC
S
VI (LIM)
ILIM
HIGH
COMP.
HIGH
IN
R Q
DEAD TIME
S
FALLING EDGE
DELAY
S
20 - 50 us
17
VBIAS
14 - 16
V
IN
5
BOOT
DR
S
S
6 - 10
PH
S
11 - 13
PGND
4
PERGD
SIU-100/100T