Sony NSP-1 Service Manual page 66

IC
MAX1718EEI (MAXIM)
STEP-DOWN CONTROLLER FOR CPU
—TOP VIEW—
INPUTS
D0 - D4
1 28
FB
ILIM
2 27
NEG
OVP
3 26
POS
S0, S1
4 25
SKP/
SUS
5 24
TON
V+
6 23
ZMODE
7 22
OUTPUTS
DH
8 21
DL
REF
9 20
VGATE
10 19
INPUTS/OUTPUTS
BST
11 18
CC
LX
12 17
TIME
13 16
14 15
PIN PIN
I/O SIGNAL I/O
NO. NO.
1 I 8 I
V+
SDN
2 I 9 —
SKP/
3 I/O 10 I
TIME
4 I 11 O
FB
5 I 12 I
NEG
6 I/O 13 I
CC
7 I 14 O
S0
FROM
1
V+
ON-TIME
D/A
10
COMPUTE
TON
TON
Q
TRIG
1-SHOT
ERROR
_
_ REF
+
70 KΩ
6
CC
gm gm
_ _
5
NEG
13
POS
2
SDN
SKP/
REF REF
_10% +10%
_ _
14
VGATE
5-4
: VID DAC CODE
: FEED BACK
: CURRENT LIMIT
: NEGATIVE FEED BACK OFFSET ADJUST
: OVER VOLTAGE PROTECT
: POSITIVE FEED BACK OFFSET ADJUST
: SUSPEND MODE VOLTAGE SELECT
SDN
: SHUT DOWN AND SKIP MODE CONTORL
: SUSPEND MODE
: TIMER SELECT
: BATTERY VOLTAGE DETECT
: PERFORMANCE MODE
: HIGH SIDE GATE DRIVER
: LOW SIDE GATE DRIVER
: REFERENCE VOLTAGE
: POWER GOOD
: BOOST FLYING CONDENSER
: INTEGRATOR CONDENSER CONNECT
: INDUCTOR
: THROUGH RATE CLOCK ADJUST
PIN PIN
SIGNAL I/O SIGNAL I/O SIGNAL
NO. NO.
—
S1 15 22 I
GND
16 O 23 I
V
CC DL
TON 17 — 24 I
V
CC
I
REF 18 25 I
SUS
19 I 26 I/O
ILIM ZMODE
OVP
I
POS 20 27 I/O
21 I 28 O
VGATE D4
TOFF
1-SHOT
TRIG
Q
S Q
R CURRENT
LIMIT
AMP
+
10 K ZERO CROSSING
_
REF
S
Q
R
+
_
FB
2 V
REF
OVP/UVP
DETECT
R-2R
D/A CONVERTER
MUXES AND SLEW CONTROL
MAX3243CPWR (TI)
RS-232 LINE DRIVER/RECEIVER
—TOP VIEW—
1
2
3
4
5
6
7
8
9
10
11
12
13
14
PIN
I/O SIGNAL
NO.
1 — C2+
D3 2 — C2_
D2
3 — V_
D1 4 I RIN1
D0 5 I RIN2
BST 6 I RIN3
LX 7 I RIN4
DH
DRIVER BLOCK
FORCEOFF
DIN FORCEON
12
x x
ILIM
0 1
26
1 1
BST
0 0
28
DH
1 0
0 0
1 0
27
LX
RECEIVER BLOCK
RIN1,
FORCEOFF
RIN2
RIN3 - RIN5
0 x
1 x
16
DL 0 0
0 1
1 0
1 1
4
NC NC
FB
0 : LOW LEVEL
1 : HIGH LEVEL
11
REF
x : DON'T CARE
HI-Z : HIGH IMPEDANCE
NC : NO CONNECTION OR CONNECTED TO DRIVER OFF
14
DIN1
13
DIN2
12
DIN3
22
FORCEOFF
AUTO POWER DOWN
23
FORCEON
19
ROUT1
20
ROUT2B
18
ROUT2
17
ROUT3
16
ROUT4
15
ROUT5
INPUTS
DIN1 - DIN 3 : RS-232 DRIVER
28
FORCEOFF
: FORCE OFF
FORCEON : FORCE ON
27
RIN1 - RIN5 : RS-232 RECEIVER
26
OUTPUTS
DOUT1 - DOUT3 : RS-232 DRIVER
25
INVALID
: INVALID
ROUT1 - ROUT5 : RS-232 RECEIVER
24
OTHERS
23
C1+, C1_, : EXTERNAL CAPACITOR CONNECTION
C2+, C2_
22
V_ : NEGATIVE OUTPUT POWER SUPPLY
V+ : POSITIVE OUTPUT POWER SUPPLY
21
20
19
18
17
16
15
PIN PIN
I/O SIGNAL I/O SIGNAL
NO. NO.
8 I RIN5 15 O ROUT5
9 O DOUT1 16 O ROUT4
10 O DOUT2 17 O ROUT3
11 O DOUT3 18 O ROUT2
12 I DIN3 19 O ROUT1
13 I DIN2 20 O ROUT2B
INVALID
14 I DIN1 21 O
VALID RIN
DOUT DRIVER STATUS
RS-232 LEVEL
x HI-Z POWER OFF
0
1 x 1 NORMAL OPERATION
(AUTO POWER DOWN DISABLE)
x 0
1
1 YES 1
NORMAL OPERATION
YES 0 (AUTO POWER DOWN ENABLE)
1
1 NO HI-Z
POWER OFF
(BY AUTO POWER DOWN)
1 NO HI-Z
VALID RIN
ROUT2B ROUT RECEIVER STATUS
RS-232 LEVEL
0 x 0 HI-Z
POWER OFF
x 1 HI-Z
0 (ROUT2B ACTIVE)
1 YES 0 1
YES 0 0
1
NORMAL OPERATION
1 YES 1 1 (AUTO POWER DOWN
DISABLE/ENABLE)
1 YES 1 0
NO 0 1
1
9
DOUT1
10
DOUT2
11
DOUT3
21
INVALID
4
RIN1
5
RIN2
6
RIN3
7
RIN4
8
RIN5
PIN
I/O SIGNAL
NO.
FORCEOFF
22 I
23 I FORCEON
24 — C1_
25 — GND
26 — V
CC
27 — V+
28 — C1+
NSP-1