Memorex MVDP1085-BLW Service Manual - Page 28
RT9284, ETK4863
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UPC - 749720014163
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TU24C02 A0 1 A1 2 A2 3 GND 4 2048 bit EEPROM array 7bit Address decorder 7bit Slave/word Address register 8bit Data register Start Stop Control Circuit ACK High-voltage Power supply generator Voltage detector 8 VCC 7 Start 6 SCL 5 SDA RT9284 VDD 6 OVP 5 EN 4 Current Bias ibias Band Gap V REF Protection Circuit OVP UVLO Timer 5ms 1.2MHz OSC OCP 750mA + - Soft Start + - PWM Logic Buffer V REF 1 LX 3 FB GND 2 ETK4863 6 -IN A 8 +IN A 10 Bypass Amp1A + 20k 50k VDD/2 50k -OUT A 5 20k 20k - +OUT A Amp2A 3 + 11 -IN B 9 +IN B Amp1B + 20k -OUT B 12 20k 20k 1 Shutdown 16 HP-IN GND 2,7,15 - +OUT B Amp2B 14 + 29
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A0
2048 bit EEPROM array
1
2
3
A1
A2
Address
decorder
Slave/word
Address register
Data
register
7bit
7bit
8bit
Control Circuit
High-voltage
generator
Power supply
Voltage detector
Start
Stop
5
6
7
8
4
GND
ACK
Start
SCL
SDA
VCC
TU24C02
Current Bias
Band Gap
ibias
V
REF
OVP
Protection Circuit
UVLO
Timer
5ms
OVP
EN
VDD
OCP
750mA
PWM
Logic
1.2MHz OSC
+
-
+
-
V
REF
Soft Start
Buffer
LX
FB
GND
RT9284
6
5
4
1
2
3
20k
+OUT A
+
-
Amp2A
+
-
Amp1A
-OUT A
20k
20k
50k
50k
VDD/2
Bypass
+IN A
-IN A
20k
+OUT B
+
-
Amp2B
+
-
Amp1B
-OUT B
20k
20k
+IN B
-IN B
GND
2,7,15
9
11
10
8
6
Shutdown
HP-IN
1
16
14
12
3
5
ETK4863