14
PCB-POWER
IC950 STR-M6833A
START
OVP
TSD
3.1V
9.9V
R2
7
SS.Tri
LATCH
REG
DRIVE
OCP
0.5V
OSC
INH
1.5V
R4
C4
C3
C2
R3
C1
R1
1
D
2
S
4
OCP.INH
5
Vin
3
6
GND
F/B
IC981,982 PQ3RD23
2
1
3
DEDICATED IC
4
GND
Vin
Vc
Vo
PCB-POWER SUB
IC9A5 M62320FP
12
D7
11
D6
10
D5
9
D4
7
D3
6
D2
5
D1
4
D0
I/O PORT
DIRECTIONAL
REGISTER
OUTPUT DATA
LATCH
INPUT DATA
LATCH
8
8
8
Input Data
Output Data
Input/Output
8
8
SHIFT REGISTER
8
I C BUS
INTERFACE
2
POWER ON
RESET
Reset
13
8
V
DD
GND
2
3
SCL
SDA
16
15
14
CS0 CS1 CS2
1
SO
IC9A1 SI-3120C
Tr1
MIC
3
2
4
1
5
CONSTANT
VOLTAGE CIRCUIT
OUTPUT ON/OFF
CONTROL CIRCUIT
PROTECTION
CIRCUIT
DRIVE
CIRCUIT
ERROR AMP
CIRCUIT
REFERENCE
VOLTAGE CIRCUIT
EQUIVALENT
TO
LS TYPE TTL
Vin
Vc (on/off)
GND
Vo sence
Vo
IC9A2 LM2596S-ADJ
COMP.
COMP.
CURRENT
LIMIT
200mV
220mV
DRIVER
TERMINAL
LIMIT
LATCH
3A
SWITCH
150kHz
OSC.
FREQ. SHIFT
RESET
COMP.
AMP
OP AMP
1.235V
REFERENCE
2.5V
REGULATOR
START
UP
CURRENT
SOURCE
BIAS
2.5V
GM
ACTIVE
CAPACITOR
R2
R1 = 2.5k
3.3V,R2 = 4.2k
5V,R2 = 7.6k
12V,R2 = 21.8k
ADJ,R2 = 0
Ω
R1 = OPEN
1
2
3
4
5
FEEDBACK
OUTPUT
GND
V
IN
ON/OFF
IC BLOCK DIAGRAMS
Summary of Contents for S290U
Page 83: ...16 ...
Page 180: ...113 SYMBOL NO ADDRESS X7A1 A 3 PCB MAIN COMPONENT SIDE ...
Page 188: ...121 ...