High Voltage CRT Driver
CVA24156T
FEATURES
••Fall Time (CLOAD = 10pf ) . . . . . . . . . . . . . . . . . . . . . . 20ns
••RiseT im e (CLOAD = 10p f). . . . . . . . . . . . . . . . . . . . . . 20ns
••Swing Vol tage . . . . . . . . . . . . . . . . . . . . . . . . . . . 100Vp-p
••S up p ly Volt ag e. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 0 0V
BENEFITS
••Low Power
••Small er Package
APPLICATIONS
••High Def i ni tio n Televi si on
••Projection Televi si o n
••Arcades
••TV Monitors
DESCRIPTION
The CVA24156T is a single channel, very high voltage
amplifier, designed to drive a CRT. It features no cross-over
distortion for excellent linearity. Emitter peaking option is
avai lable to adj u s t the high frequency response. CVA24156T
features high gain to match existing pre-amplifier drive
capability.
ORDERING INFORMATION
Part Package Temperature
CVA24156T T11A 0oC to +100oC
CORPORATION
CONNECTION DIAGRAM
11
10
9
8
7
6
5
4
3
2
1
TAB = GND
TOP VIEW
T11A PACKAGE
1P-06
N/C
N/C
N/C
GND
GND
V
BIAS
IN
V
OUT
V
OUT
V
EMITTER
PEAKING
CC
V
SIMPLIFIED SCHEMATIC DI AGRAM
OUT
V
BIAS
V
CC
V
IN
V
EMITTER
PEAKING
11
8,9
4,5
3
2
1
1P-07
CALOGIC CORPORATION , 237 Whitney Place, Fremont, California 94539, Tele phone: 510 -656- 2900, FA X: 510-65 1-3025
ABSOLUTE M AXIM UM R A T INGS
Supply V o ltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250V
Storage Tempera tu re. . . . . . . . . . . . . . . . . . -25 oC t o +125oCCase Temperatur e. . . . . . . . . . . . . . . . . . . . . . 0oC to +100oC
Lead Te mperat ure . . . . . . . . . . . . . . . . . . . . . . . . . . . +300oC
CVA24156T
FIGURE 1. TEST CIRCUI T
DC ELECTRICA L CHARACT ERISTICS VS = 160V, CL = 10pF, Vbias = 12 V, Vin = 3V, Tcase = +25oC. See Figur e 1.
SYMBOL CHARACTERISTICS MIN TYP MAX UNITS
ICC Supply Current 24 29 34 mA
VoutDC Output DC Level 87 91 95 V
AVVol tage Ga in 23 25 27 V
AC ELECTRICA L CHARACT ERISTICS VS = 150V, CL = 10pF, Vbias = 12 V, Vout = 1 00Vp-p, Tcase = +25oC. See Figure 1.
SYMBOL CHARACTERISTICS MIN TYP MAX UNITS
trRi se Time 20 ns
tfF all Time 20 ns
Le Linearity 2 5 %
OS Overshoot 2 %
Note 1: -3dB at VP-P = 100V
V
out
R2
C6 C2
C
L
L1
V
CC
R1 OUTPUT
R1 = 47
W
R2 = 1K
W
D1 = FDH400
D2 = FDH400
L1 = 560nH
C1 = 1.0
m
F
C2 = 1.0
m
F
C = 10pF (Inc l udin g Paras it i cs )
L
GND
TAB
8,9
1U-16
1
V
bias
2
V
in
D2
11
D1
V
CC
CVA24156T
82pF
22
34,5
33
CALOGIC CORPORATION , 237 Whitney Place, Fremont, California 94539, Tele phone: 510 -656- 2900, FA X: 510-65 1-3025
CORPORATION
CVA24156T
CALOGIC CORPORATION , 237 Whitney Place, Fremont, California 94539, Tele phone: 510 -656- 2900, FA X: 510-65 1-3025
FIGURE 2. APPLI C AT ION CIRCUI T
APPLICAT ION INFORMATION
The CVA24156T is a very high voltage amplifier . Using standard
Cascode topology, it is designed primarily to meet the
requirement of High Definition Television (HDTV), Projection
Television, arcade displays, etc. CVA24156T can deliver
100VP-P yet require only 160V supply voltage. CVA24156T
frequency resplonse is excellent, can energize 40ns pixels at
100VP-P into 10pf.
CVA24156T has very high gain (~25) to match any of the
available pre-amplifiers. A resistor from pin 3 to GND can
fur ther increase t he gain to desi red voltage. An emitter peaking
option is also pr ov id ed to adjust the high fr eque ncy r esp onse.
The product is housed in industry standard 11 lead TO-220
power packag e.
Thermal Consi de rati ons
The transfer characteristics of the amplifier are shown in
Figure 3.
Since this is a class A input stage, power supply
current increases as the input signal increases and
consequ ent ly power dissipation also increase s.
The CVA24156T cannot be used without heat sinking.
Figure
3
shows the power dissipated over the operating voltage
range of the device. Under white screen conditions, i.e.: 25V
output, di s s i p ation i n c r eases to 7 W t o tal. The CV A24156T case
temperature must be maintained below +100oC. If the
maxi mu m expect ed ambient temperature is +50oC, then a heat
sink is needed wi th thermal r esistance equal t o or l ess than:
R
th = (100 − 50oC)
7W = 7.2oC/W
The out put of CVA24156T is not short circuit proo f.
1U-17
GND
TAB
V
BIAS
C1 = 0.01
m
F
C2 = 100
m
F
C3 = 0.1
m
F
C4 = 100
m
F
C5 = 2.2
m
F
C7 = 40 - 120pf
D1, D2 = FHD400
L = 150 - 330nH
R1 = 15
W
R2 = 47
W
R3 = 47(1/2W)
W
R4 = 820
W
R2
R3
C4C3
C2C1
D2
D1
V 11
CC
8,9
V
OUT
C5
SPARK
GAP
CVA24156T
R4
L
V
IN
R1
VIDEO
INPUT 2
C7
V
PG
3
DC BIAS
4,5
N.C. = 6,7,10
1
FIGURE 3. CVA2415 6T Transf er DC Chara cterist ics
V (VOLTS)
OUT
V (VOLTS)
IN
160
140
120
100
80
60
40
20
0
1U-18
0
0.2
0.5
0.7
1
1.2
1.5
1.7
2
2.2
2.5
2.7
3
3.2
3.5
3.7
4
4.2
4.5
4.7
5
5.2
5.5
5.7
6
6.2
6.5
SERIES 2
V
OUT
POWER (W)
8
7
6
5
4
3
2
1
0
CORPORATION
CVA24156T
TYPICAL CHARACTERI STI CS
CORPORATION
1U-20
20ns/DIV
20V/DIV
FALL TIME
-75.6ns 124.4ns
-5V
195V
1U-19
20ns/DIV
20V/DIV
RISE TI ME
-75.6ns 124.4ns
-5V
195V
Inf orm at i on furni shed by Calogic is believed to be accurate and reliable. Howe ver, n o responsibi lit y is a ssumed for its use: no r for any infringeme nt of pate nts or other
rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent rights of Calogic.
CALOGIC CORPORATION, 237 Whitney Pla ce, Frem ont, California 94539, Telephone: 510-656-2900, FAX: 510-6 51-3025