M52734 Mitsubishi, M52734 Datasheet

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M52734

Manufacturer Part Number
M52734
Description
3-CHANNEL VIDEO AMPLIFICATION WITH OSD BLANKING
Manufacturer
Mitsubishi
Datasheet

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M52734SP
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DESCRIPTION
The M52734SP is a semiconductor integrated circuit amplifies
video signals, having a 3-channel amplifier with a band width of
130MHz. The circuit also features the OSD mixing function.
The circuit is most useful with high resolution displays that have
OSD, and its function are available for each channel, including OSD
blanking, OSD mixing, wide-band amplification, contrast control
(main and sub), and brightness control.
FEATURES
APPLICATION
Display monitor
RECOMMENDED OPERATING CONDITION
Supply voltage range....................................................11.5 to 12.5V
Rated supply voltage................................................................12.0V
1
BLOCK DIAGRAM
Frequency band width: RGB................................130MHz (3V
Input
Output :RGB...........................................................4.0V
To adjust contrast, two types of controls are provided, main and
sub. With the main control, the contrast of the 3-channels can be
changed simultaneously. Sub controls are used to adjust the
contrast of a given channel individually. The control terminals can
be controlled by applying a voltage of 0 to 5V.
The DC power remains stable at the IC output terminal because
a feedback circuit is built in.
OSD ADJUST
BLK IN
OSD
36
1
:RGB.............................................................0.7V
OSD...............................................3.0V
BLK ...............................................3.0V
OSD...........................................................4.0V
OUTPUT (B)
V
CC1
35
OSD Mix
2
(B)
AMP
Clamp
B
B
INPUT (B)
V
B
CC2
34
3
CONTRAST(B)
(B)
OSD..............................................50MHz
HOLD (B)
SUB
33
4
Brightness
Blanking
Contrast
OSD IN
Hold
B
B
B
B
NC
(B)
32
5
GND1 (B)
GND2 (B)
31
6
OUTPUT (G)
V
CC1
P-P
P-P
30
OSD Mix
7
(G)
min. (positive)
AMP
min. (positive)
Clamp
G
G
INPUT (G)
G
3-CHANNEL VIDEO AMPLIFICATION WITH OSD BLANKING
V
P-P
P-P
CC2
29
8
P-P
CONTRAST(G)
(max.)
(max.)
(G)
HOLD (G)
(typ.)
P-P
SUB
28
9
)
Brightness
Blanking
Contrast
OSD IN (G)
Hold
G
G
G
G
NC
27
10
PIN CONFIGURATION (TOP VIEW)
GND2 (G)
GND1 (G)
SUB CONTRAST (G)
SUB CONTRAST (R)
SUB CONTRAST (B)
11
26
MAIN CONTRAST
OUTPUT (R)
V
OSD BLK IN
CC1
OSD IN (G)
OSD IN (R)
OSD IN (B)
12
25
INPUT (G)
INPUT (R)
OSD Mix
INPUT (B)
GND1 (G)
GND1 (R)
GND1 (B)
(R)
V
AMP
V
Clamp
V
CC1
INPUT (R)
CC1
CC1
R
R
CP IN
R
V
CC2
(G)
(B)
(R)
24
13
CONTRAST(R)
(R)
10
11
12
13
14
15
16
17
18
HOLD (R)
1
2
3
4
5
6
7
8
9
Outline 36P4E
SUB
MITSUBISHI ICs (Monitor)
14
23
Brightness
OSD IN (R)
Blanking
Contrast
Hold
R
R
R
R
NC
22
15
GND2 (R)
M52734SP
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
GND1 (R)
16
21
OSD ADJUST
OUTPUT (B)
V
HOLD (B)
NC
GND2 (B)
OUTPUT (G)
V
HOLD (G)
NC
GND2 (G)
OUTPUT (R)
V
HOLD (R)
NC
GND2 (R)
NC
BRIGHTNESS
NC : NO CONNECTION
CC2
CC2
CC2
CONTRAST
MAIN
(B)
(G)
(R)
NC
20
17
BRIGHTNESS
CP IN
18
19

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M52734 Summary of contents

Page 1

... DESCRIPTION The M52734SP is a semiconductor integrated circuit amplifies video signals, having a 3-channel amplifier with a band width of 130MHz. The circuit also features the OSD mixing function. The circuit is most useful with high resolution displays that have OSD, and its function are available for each channel, including OSD blanking, OSD mixing, wide-band amplifi ...

Page 2

... T.P.25 Relative to measured values above T.P. T.P. SG6 SG6 SG6 T.P.25 Relative to measured values above T.P. T.P. T.P.25 Relative to measured values above MITSUBISHI ICs (Monitor) M52734SP Unit Limits Pulse input SW1 V19 V36 Min. Typ. 5, 10, SW18 100 ...

Page 3

... SG4 SG4 SG4 3.3 SG4 SG4 SG4 SG6 SG6 SG6 MITSUBISHI ICs (Monitor) M52734SP Limits Pulse input SW1 V36 5, 10, Min. Typ. SW18 1.7 2.3 SG5 -0 0.5 0.9 SG5 -0 -2 ...

Page 4

... Voltage V below TR1 TG1 Use relevant voltages, depending on the pin at which the waveform is output; specifically, use TG2 TB2 T.P25; V MITSUBISHI ICs (Monitor) M52734SP Limits Pulse input SW1 V19 V36 Min. Typ. SW18 5, 10 -0.3 0 SG5 ...

Page 5

... To obtain brightness control relative characteristics, calculate the . CR2 difference in the output between the channels, using V are calculated by CR2 and V OB7 /V OB3 OR3 MITSUBISHI ICs (Monitor) M52734SP ( OR4 OG4 OB4 and relative SCR1 are calculated, respectively, by the SCR1 OR4 ...

Page 6

... Crosstalk C. calculated by the equation below: OR1 ( when OR8 OG8 OB8 ) when SG3 is input, are calculated as follows P-P are equal to the C1' MITSUBISHI ICs (Monitor) M52734SP , except that CONTRAST (V17) is turned C1' C1 and or V respectively P-P C.T.1 =20LOG P-P (C.T.1') V ...

Page 7

... Make sure that signals are not being output synchronously with SG7 (blanking period). 3. Reduce the SG7 input level gradually, monitoring output. Measure the SG7 level when the blanking period disappears. The measured value is called V1th. and DC2 MITSUBISHI ICs (Monitor) M52734SP ( and is treated as Oaj1. ORA OGA OBA ( and is treated as Oaj2 ...

Page 8

... OSD signals Pulses which are synchronous with standard video step waveform’s video portions: amplitude, 4.0V 3-CHANNEL VIDEO AMPLIFICATION WITH OSD BLANKING Signals (f=1MHz) P-P (f=50MHz) P-P (f=130MHz) P-P (f=1MHz, duty=50%) P-P 2.0V P-P 3.0 s (f=30kHz, amplitude sometimes variable) P-P MITSUBISHI ICs (Monitor) M52734SP 0.7V P-P 0.7V P-P 3 and pulse width P-P 8 ...

Page 9

... GND V NC GND CC M52734SP GND V GND 0.01 V9 SW10 SW8 100 125 150 MITSUBISHI ICs (Monitor) M52734SP 680 2 GND GND 0.01 V14 V17 SW18 SW15 SW13 SG5 ...

Page 10

... CRT 680 M52734SP OSD IN INPUT OSD IN (B) (G) (G) MITSUBISHI ICs (Monitor) M52734SP DC CLAMP 680 INPUT OSD IN CLAMP (R) (R) Units Resistance : ...

Page 11

... OSD IN (B) 10 OSD IN (G) 15 OSD IN (R) 11 3-CHANNEL VIDEO AMPLIFICATION WITH OSD BLANKING DC voltage (V ) Peripheral circuit of pins B-ch G- 2.5 2.5 MITSUBISHI ICs (Monitor) M52734SP Description of function V CC Input pulses of minimum 3V. Connected to GND if not 2.5V used. GND 0.9mA Apply equivalent voltage to 3 channels Clamped to about 2.5V due to clamp pulses from pin 18 ...

Page 12

... NC 23 Hold (R) 28 Hold (G) 33 Hold (B) 3-CHANNEL VIDEO AMPLIFICATION WITH OSD BLANKING DC voltage (V ) Peripheral circuit of pins GND 2 Variable 0.2mA MITSUBISHI ICs (Monitor) M52734SP Description of function V CC 1.5k Use at maximum 5V for 2.2V 23.5k stable operation. GND 41k Input pulses of minimum 2.5V. 2.2V Input at low impedance. ...

Page 13

... VIDEO AMPLIFICATION WITH OSD BLANKING Peripheral circuit of pins Pin 24 Apply 12 Pin 29 Pin 34 Variable 65k 1k 55k MITSUBISHI ICs (Monitor) M52734SP Description of function Used to supply power to output emitter follower only. Apply equivalent voltage to 3 channels. A resistor is needed on the GND side. Set discretionally to maximum 15mA, ...

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