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CXA1819Q
RGB Driver for LCD
Description The CXA1819Q is an RGB driver designed for LCD panel LCX007. It supports a line alternative RGB drive system. In addition, three-panel projectors can be supported by using three CXA1819Q ICs. Features * Built-in RGB signal phase matching sample-andhold circuit * Effective frequency response (horizontal resolution of 600 TV lines achieved in combination with the LCX007AL) * Built-in control circuit * Built-in side black generation circuit for 4:3/16:9 aspect conversion * Built-in VCOM voltage output circuit Absolute Maximum Ratings * Supply voltage VCC * Operating temperature Topr * Storage temperature Tstg * Allowable power dissipation PD Operating Condition Supply voltage 48 pin QFP (Plastic)
Structure Bipolar silicon monolithic IC Applications Liquid crystal projectors Liquid crystal viewfinders Compact liquid crystal monitors
14 -20 to +75 -65 to +150 600
V C C mW
VCC1 VCC2
5 12.2 to 13.3
V V
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
-1-
E94634A77
CXA1819Q
Block Diagram
RGBBRT
RBRT
BBRT
SIDBRT
PRG
26
SH1
SH2
36
35
BF
34
33
32
SH3
NC
31
SH4
30
29
28
27
25
NC 37 NC 38 RIN 39 GIN 40 BIN 41 BRT 42 VCC1 43 VCC1 44 GND1 45 GND1 46 MODE 47 NC 48 GAIN CONT CLP S/H S/H BRT CLP S/H S/H BRT CLP S/H S/H BRT
SUB BRT CONT AMP BUFF
FRP
24 NC 23 VCOMCONT
22 VCOMOUT 21 SIDCLP GAMMA AMP BUFF 20 SIDOUT 19 VCC2
GAMMA
AMP
BUFF
18 VCC2 17 16 GND2 GND2 ROUT RCLP NC
GAMMA
AMP
BUFF
15 14 13
1
2
3
4
5
6
7
8
9
10
11
12
BOUT
GCLP
SIDGAIN
BGAIN
GAMMA
RGAIN
SIG.C
BCLP
NC
RGBGAIN
-2-
GOUT
NC
CXA1819Q
Pin Description Pin No. Symbol Pin voltage Equivalent circuit Description
VCC1
1.5k
2
GAMMA
0 to 5V
2 129 50A GND1
Gamma control. Gamma variable range: 3.7 to 15dB Preset mode (pin 0V) 0dB
3
B GAIN
1.6 to 5V
VCC1
1.5k 3 4 129 50A GND1
B signal gain control. Gain variable range: -2.0 to +2.0dB
4
R GAIN
1.6 to 5V
R signal gain control. Gain variable range: -2.0 to +2.0dB
VCC1
400
5
RGB GAIN
1.6 to 5V
5 129 150A GND1
RGB signal common gain control. Gain variable range: 5.5 to 11dB
VCC1
1.5k
6
SID GAIN
1.6 to 5V
6 129 50A GND1
SID signal gray level control.
Note) in the Pin voltage indicates external applied voltage.
-3-
CXA1819Q
Pin No.
Symbol
Pin voltage
Equivalent circuit
Description
VCC2
7
SIG CENT
1.6 to 5V
7 129 100A GND1
RGB signal center voltage control. Center voltage variable range: 6.2 to 7.6V
VCC2
8
B CLP
6.2 to 7.6V
8 129
B output detection signal input.
5A GND1
VCC2
9
B OUT
8V Typ.
9
B signal output. The output is fed back to provide sufficiently low impedance (less than few ).
GND2
VCC2
10
G CLP
6.2 to 7.6V
10 129 5A
G output detection signal input.
GND1
Note) in the Pin voltage indicates external applied voltage.
-4-
CXA1819Q
Pin No.
Symbol
Pin voltage
Equivalent circuit
Description
VCC2
11
G OUT
8V Typ.
11
G signal output. The output is fed back to provide sufficiently low impedance (less than few ).
GND2
VCC2
14
R CLP
6.2 to 7.6V
14 129
R output detection signal input.
GND1
5A
VCC2
15
R OUT
8V Typ.
15
R signal output. The output is fed back to provide sufficiently low impedance (less than few ).
GND2
16 17 18 19
GND2
GND
GND.
Vcc2
13V
13V power supply.
VCC2
20
SID OUT
8V Typ.
20
SID signal output. The output is fed back to provide sufficiently low impedance (less than few ).
GND2
Note) in the Pin voltage indicates external applied voltage.
-5-
CXA1819Q
Pin No.
Symbol
Pin voltage
Equivalent circuit
Description
VCC2
21
SID CLP
6.2 to 7.6V
21 129
SID output detection signal input.
5A
GND1
VCC2
22
VCOM OUT
6.2 to 8.0V
50A GND1
22
VCOM voltage output. The output is fed back to provide sufficiently low impedance (less than few ).
VCC2
23
VCOM CONT
1.6 to 5V
23 129 100A GND1
VCOM voltage control. VCOM voltage variable range: 6.2 to 8.0V
VCC2
30s H 5V
25
FRP
L 0V
25 129 2.5V 100A GND1
Flyback pulse input. This pulse is used to invert the polarity of R, G and B outputs. Input level: High 4V, Low 1V
Note) in the Pin voltage indicates external applied voltage.
-6-
CXA1819Q
Pin No.
Symbol
Pin voltage
Equivalent circuit
Description
VCC1 100A
26
PRG
0V
26 129 2.5V GND1
This pin switches black level and gray level output of the SID signal. Black level is output for 0V and gray level is output for 5V. This pin should normally be set to 0V.
1.5k
27
SID BRT
1.6 to 5V
27 129 50A
SID signal black level control.
VCC1
28
RGB BRT
1.6 to 5V
400 28 129 150A GND1
RGB signal common brightness control. Brightness variable range: 5 to 9.8V
VCC1
29
R BRT
1.6 to 5V
1.5k 29 30 129 50A GND1
R signal brightness control. Brightness variable range (difference with G signal): -1.0 to +0.7V
30
B BRT
1.6 to 5V
B signal brightness control. Brightness variable range (difference with G signal): -1.0 to +0.7V
Note) in the Pin voltage indicates external applied voltage.
-7-
CXA1819Q
Pin No.
Symbol
Pin voltage
Equivalent circuit
Description Resampling sample-and-hold pulse input. Input level: High 4.2V, Low 0.4V
31
SH4
VCC1
32
SH3
H L
100A 66ns 5V 0V 22ns 31 32 33 34 GND1 129 200
B signal sample-and-hold pulse input. Input level: High 4.2V, Low 0.4V G signal sample-and-hold pulse input. Input level: High 4.2V, Low 0.4V R signal sample-and-hold pulse input. Input level: High 4.2V, Low 0.4V
33
SH2
34
SH1
VCC1 30s H 5V 35 L 1.2s GND1 50A 0V 129 2.5V 1.5k
35
BF
Burst flag pulse input. Used as an input clamp pulse. Input level: High 4V, Low 1V
39
R IN
2.5V (PEDESTAL LEVEL)
VCC1 120A 39 40 41 129 1k GND1
R signal input.
40
G IN Signal more than 1V from pedestal is sliced after input to IC.
G signal input.
41
B IN
B signal input.
VCC1
1.5k
42
BRT
1.6 to 5V
42 129 50A GND1
User brightness control. Adjusts the input DC level for the gamma breakpoint. Control voltage: 1.6 to 5V
Note) in the Pin voltage indicates external applied voltage.
-8-
CXA1819Q
Pin No. 43 44 45 46
Symbol Vcc1
Pin voltage 5V
Equivalent circuit
Description 5V power supply.
GND1
GND
GND.
VCC1 100A
47
MODE
5V
47 129 2.5V GND1
Gain control mode selector. Normal mode for 5V and high gain mode for 0V. This pin should normally be set to 5V.
Note) in the Pin voltage indicates external applied voltage.
-9-
CXA1819Q
Electrical Characteristics
(Ta = 25C, Vcc1 = 5V, Vcc2 = 13V, see the Electrical Characteristics Measurement Circuit.) Measurement conditions Measurement method
No.
Item
Symbol Input pin
Conditions
Measurement point 43 44 18 19
Min. Typ. Max. Unit
1 2
Current Icc1 consumption 1 Current Icc2 consumption 2 FR 39 40 41 39 40 41 Frequency response Input waveform diagram 1 Output waveform diagram 1 Input waveform diagram 2 Output waveform diagram 2
Input waveform diagram 2 Output waveform diagram 2 RGB gain pin = 1.6V
5V power supply current 16.6 consumption I43 + I44 13V power supply current 11.4 consumption I18 + I19 Frequency which is -3dB at 200kHz
22 14
27.4 mA 21.1 mA
15 11 9 15 11 9 I/O gain 8.6 dB 11 MHz
3
FG FB
4
R, G, B standard gains
GR GG GB
5
6
RGB gain adjust -ment range
Min. GGL 40 Max. GGH
G I/O gain 11 G I/O gain
3.5
5.50 dB
Input waveform diagram 2 Output waveform diagram 2 RGB gain pin = 5.0V Input waveform diagram 2 Output waveform diagram 2 R gain pin = 1.6V
11.0 12.5
7 R gain adjust -ment range
Min. GRL 39 Max. GRH
R I/O gain difference with G I/O gain 15 R I/O gain difference with G I/O gain B I/O gain difference with G I/O gain 9 B I/O gain difference with G I/O gain Black level and gray level difference of SID output 20 Black level and gray level difference of SID output 2.0 2.0
-3.5 -2.0 dB +3.5
8
Input waveform diagram 2 Output waveform diagram 2 R gain pin = 5.0V Input waveform diagram 2 Output waveform diagram 2 B gain pin = 1.6V
9 B gain adjust -ment range
Min. GBL 41 Max. GBH
-3.5 -2.0 dB +3.5
10
Input waveform diagram 2 Output waveform diagram 2 B gain pin = 5.0V Input waveform diagram 4 Output waveform diagram 6 SID gain pin = 1.6V
11
12
SID gain adjust -ment range
Min. GSL 26 Max. GSH
0.75 0.94 V 2.1 2.4
Input waveform diagram 4 Output waveform diagram 6 SID gain pin = 5.0V
- 10 -
CXA1819Q
Measurement conditions No. Item Symbol Input pin RL 13 Gamma adjust -ment range Min. GL BL RH Max. GH BH 39 40 41 39 40 41 Conditions
Input waveform diagram 3 Output waveform diagram 3 GAMMA pin = 1.6V Input waveform diagram 3 Output waveform diagram 3 GAMMA pin = 5.0V Output waveform diagram 4 RGB BRT pin = 1.6V
Measurement point 15 11 9 15 11 9
Measurement method I/O gain-GR I/O gain-GG I/O gain-GB I/O gain-GR I/O gain-GG I/O gain-GB
Min. Typ. Max. Unit
1
3.7 dB
14
15
18
15
16
RGB BRT adjust -ment range
Min. BGL 40 Max. BGH
3.9 11 Voltage between pedestals of odd and even lines at G output
5.0 V
Output waveform diagram 4 RGB BRT pin = 5.0V
9.8
10.5
17 R BRT adjust -ment range
Min. BRL 39 Max. BRH
Output waveform diagram 4 R BRT pin = 1.6V
15
Output waveform diagram 4 R BRT pin = 5.0V
18
Voltage difference between R output pedestals of odd and even lines to G output
-2.2 -1.0 V 0.7 2.1
19 B BRT adjust -ment range
Min. BBL 41 Max. BBH
Output waveform diagram 4 B BRT pin = 1.6V
9
Output waveform diagram 4 B BRT pin = 5.0V Input waveform diagram 4 Output waveform diagram 7 SID BRT pin = 1.6V
20
Voltage difference between B output pedestals of odd and even lines to G output
-2.2 -1.0 V 0.7 2.1
21
22
SID BRT adjust -ment range
Min. BSL 26 Max. BSH
4.1 20 Voltage difference between SID output black levels 9.3 10.8
5.2 V
Input waveform diagram 4 Output waveform diagram 7 SID BRT pin = 5.0V
- 11 -
CXA1819Q
Measurement conditions No. Item Symbol Input pin Conditions Output waveform diagram 5 SIG.C pin = 5.0V 40 Max. SH Output waveform diagram 5 SIG.C pin = 1.6V 11 Measurement point
Measurement method
Min. Typ. Max. Unit
23
24
SIG CENT adjust -ment range
Min. SL
5.2 G output center voltage 7.6 9.0
6.2 V
25 VCOM adjust -ment range
Min. VL
VCOM CONT pin = 1.6V 22 VCOM OUT DC voltage 8.0
5.6
6.2 V
26
Max. VH
VCOM CONT pin = 5.0V
8.6
When there is no description in the Conditions, the pin voltages are as follows. GAMMA (Pin 2) = 0V, RGB GAIN (Pin 5) R GAIN (Pin 4) B GAIN (Pin 3) = 2.9V, BRT (Pin 42) RGB BRT (Pin 28) R BRT (Pin 29) B BRT (Pin 30) VCOM CONT (Pin 23) SIG.C (Pin 7) = 3.4V, MODE (Pin 47) = 5V, PRG (Pin 26) = 0V
- 12 -
Electrical Characteristics Measurement Circuit
(3.4V) (3.4V) (3.4V) (3.4V) 5V
Note 1) Always input BF signal (Pin 35) and FRP signal (Pin 25). Note 2) For Pins 2, 3, 4, 5, 6, 7, 23, 27, 28, 29, 30, and 42, apply the voltage in parentheses when there is no description in the Conditions for the Electrical Characteristics.
PRG
26 25
NC
BF
SH3
RBRT
SH1
SH4
RGBBRT
36 34 29 33 30 28 27 31
35 32
SH2
BBRT
SIDBRT
FRP
NC SUB BRT CONT 24 (3.4V) 6000pF V22 1 100k AMP 22 21 S/H AMP 20 19 18 17 16 S/H AMP S/H BRT GAMMA BUFF 15 14 GAIN CONT 13 VCC2 GND2 GND2 ROUT RCLP NC 47 0.1 VCC2 buff. BUFF S/H BRT GAMMA SIDOUT SIDCLP VCOMOUT BUFF VCOMCON 23 T
37
NC
NC
38
0.1
RIN
RIN
39
0.1
GIN
GIN
40
0.1
BIN
BIN
41
CLP
V20
BRT
42
(3.4V) S/H AMP BUFF S/H BRT GAMMA
VCC1
13V
NC
BCLP
SIG.C
BOUT
GCLP
BGAIN
RGAIN
GOUT
NC
GAMMA
RGBGAIN
SIDGAIN
- 13 -
1 2 3 7 4 5 6 8 9 10 11 12 (0V) (2.9V) (2.9V) (2.9V) (2.9V) (2.9V)
43
5V
CLP
VCC1
44
47
0.1
GND1
45
GND1
46
CLP
buff. 100k 1
V15
MODE
47
5V
NC
48
buff. 100k 1 buff. 100k 1
V11
V9
CXA1819Q
CXA1819Q
Measurement Circuit I/O Waveform Diagram
Input waveform BF (Pin 35)
5V
30s
1.5s
0V 5V 31.5s Input waveform FRP (Pin 25) 0V Input level 500mVp-p Input waveform disgram 1 APL500mV 3.5s 3.5s 0.5s
Input level 500mV Input waveform diagram 2 100mV
50mV Input waveform diagram 3 5V Input waveform diagram 4 0V Measurement level Output waveform diagram 1
Input level 100mV
0.5s
2.5s
Output waveform diagram 2
Measurement level
Output waveform diagram 3
Measurement level
Output waveform diagram 4
Measurement level (Voltage between pedestals)
a Output waveform diagram 5 a Measurement level GND Measurement level
Output waveform diagram 6
Output waveform diagram 7
Measurement level
- 14 -
Application Circuit
13V CXD2412Q Timing Generator VR 3.3k VR VR VR
NC
BF
SH3
RBRT
PRG FRP
SH1
SH4
RGBBRT SIDBRT
SH2
BBRT
ANALOG RGB IN BIN GIN RIN Represented as this. 36 34 29 25 33 30 28 27 26 31 35 32
buff.
3.3k SUB BRT CONT 24 AMP VR 22 21 CLP AMP 20 19 18 17 16 CLP S/H BUFF S/H BRT GAMMA AMP 15 14 GAIN CONT 13 GND2 GND2 ROUT RCLP NC VCC2 47 0.1 VCC2 13V buff. BUFF S/H S/H BRT GAMMA SIDOUT 390k SIDCLP 1 VCOMOUT BUFF VCOMCON 23 T NC
NC
37
NC
38
0.1
RIN
39
0.1
GIN
40
0.1
BIN
41
VR S/H BRT AMP BUFF S/H GAMMA
BRT
42
VCC1 CLP
43
5V
VCC1
44
NC
BCLP
SIG.C
BOUT
GCLP
BGAIN
GOUT
22k
0.01
NC
GAMMA
RGAIN
RGBGAIN
SIDGAIN
- 15 -
1 2 3 7 4 8 5 6 9 10 11 12 buff. VR VR VR VR VR VR buff. 390k 1
47
0.1
GND1
45
GND1
46
buff. 390k 1
5V
MODE
47
NC
48
5V
50k
VR Represented as this.
LCX007 LCD Panel 390k
1
CXA1819Q
Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same.
CXA1819Q
Description of Operation * Gamma Control
Output
This pin controls the gain of the low brightness range as shown in the figure at right. The breakpoints are constant and only the gain is changed. Gamma is OFF when the GAMMA pin (Pin 2) is 0V.
GAMMA = 0V
Input Breakpoint
* BRT Control This pin controls the pedestal of the input signal to the gamma circuit. BRT can be controlled without changing the characteristics to the panel because the input bias is changed with the breakpoint for output kept constant. In the figure at right, when the input signal pedestal is moved to the left of 0, the signal at that point is sliced. The input signal pedestal can be varied by 500mV (R, G, and B IN input conversion).
Output Output signal
Input - +
* Side Black Output (SID OUT) The CXA1819Q outputs a side black signal for 4:3/16:9 aspect conversion. The black level is controlled by the SID BRT pin (Pin 27). * Output CLP The average value of each RGB output signal and SID output signal is detected with external RC and input to the RGB CLP and SID CLP pins. Then the center voltage offsets among R, G and B outputs are reduced by feedback which equalizes the averages of G and R, B and SID outputs thus eliminating the need to adjust the center voltages among R, G and B.
Input signal
ROUT 390k RCLP 1F GCLP GOUT 390k 1F
- 16 -
CXA1819Q
Notes on Operation Take the following precautions when using the CXA1819Q.
1. R, G, B IN input signal impedance An external capacitor is used as a hold capacitor for the clamp at the input of this IC. Therefore, the input signal impedance must be sufficiently low (70 or less). Note that if the impedance is too high, the characteristics may change or oscillation may tend to occur.
0.1 R IN
25
CLP
0.1
G IN
26
CLP
0.1
B IN
27
CLP
2. R, G, B SID OUT load capacitance RGB OUT and SID OUT will tend to oscillate if a load capacitance of greater than 50pF is attached. Therefore, when a LCD panel with an input capacitance of greater than 50pF is connected to the output, a buffer should be used as shown in the figure at right. In addition, when not using a buffer, design to keep this load capacitance from exceeding 50pF.
R, G, B, SID OUT
Buffer
390k R, G, B, SID CLP 1F
Load capacitance
3. External capacitor at the output The absolute value and tolerance of leak current for the average value detecting external capacitor in the figure at right should be small. Note that if there is an offset in the leak current between R, G, B and SID, offset voltage is also generated between R, G, B and SID, of the external resistor which causes a DC offset of the output signal.
ROUT 390k RCLP 1F GCLP GOUT 390k 1F
- 17 -
CXA1819Q
Characteristics Graphs (Vcc = 5V, 13V, Ta = 25C)
RGB GAIN
14 12 4 3 2 See Electrical Characteristics 1 7 and 8 for measurement conditions. 0 -1 -2 -3 2 0 0 -4 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 -5 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
R GAIN
8 6 4
R gain to Gch gain [dB]
See Electrical Characteristics 5 and 6 for measurement 10 conditions.
Gch gain [dB]
Pin 5 voltage [V]
Pin 4 voltage [V]
B GAIN
4 3 See Electrical Characteristics 9 and 10 for measurement conditions. 20 18 16
GAMMA
Low luminance gain [dB]
2
B gain to Gch gain [dB]
1 0 -1 -2 -3 -4 -5 0
14 12 10 8 6 4 2
See Electrical Characteristics 13 and 14 for measurement conditions.
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
0
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
Pin 3 voltage [V]
Pin 2 voltage [V]
RGB BRT
12 3
R BRT
10 See Electrical Characteristics 15 and 16 for measurement 8 conditions.
R BRT difference with Gch BRT [V]
3.5 4 4.5 5
2 See Electrical Characteristics 1 17 and 18 for measurement conditions. 0
Gch BRT [V]
6
4
-1
2
-2
0 0
0.5
1
1.5
2
2.5
3
-3
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
Pin 28 voltage [V]
Pin 29 voltage [V]
- 18 -
CXA1819Q
B BRT
3 9 8.5
VCOM
B BRT difference with Gch BRT [V]
2
VCOM OUT voltage [V]
1
See Electrical Characteristics 19 and 20 for measurement conditions.
8 7.5 7 6.5 6 5.5
See Electrical Characteristics 25 and 26 for measurement conditions.
0
-1
-2
-3
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
Pin 30 voltage [V]
Pin 23 voltage [V]
SIG.C
9 8.5 8 10 12
SID BRT
Signal center voltage [V]
SID output BRT [V]
7.5 7 6.5 6 5.5 5 4.5 4 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 See Electrical Characteristics 23 and 24 for measurement conditions.
8
See Electrical Characteristics 21 and 22 for measurement conditions.
6
4
2
0
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
Pin 7 voltage [V]
Pin 27 voltage [V]
BRT
800
Input conversion offset voltage [mW]
600 400 200 0 -200 -400 -600 0 See BRT control in Description of Operation
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
Pin 42 voltage [V]
- 19 -
CXA1819Q
Package Outline
Unit: mm
48PIN QFP (PLASTIC)
15.3 0.4 + 0.4 12.0 - 0.1 + 0.1 0.15 - 0.05 0.15 36 25
37
24
48
13
+ 0.2 0.1 - 0.1
1 + 0.15 0.3 - 0.1
12
0.8
0.24
M
+ 0.35 2.2 - 0.15
PACKAGE STRUCTURE
PACKAGE MATERIAL SONY CODE EIAJ CODE JEDEC CODE QFP-48P-L04 QFP048-P-1212 LEAD TREATMENT LEAD MATERIAL PACKAGE MASS EPOXY RESIN SOLDER / PALLADIUM PLATING 42/COPPER ALLOY 0.7g
NOTE : PALLADIUM PLATING This product uses S-PdPPF (Sony Spec.-Palladium Pre-Plated Lead Frame).
- 20 -
0.9 0.2
13.5

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