ST STV9302A User Manual

Page 1
September 2003 1/15
®
STV9302A
Vertical Deflection Booster
for 2-APPTV/Monitor Applications with 70-V Flyback Generator
Power Amplifier
Flyback Generator
Output Current up to 2 App
Thermal Protection
Stand-by Control
Description
The STV9302A is a vertical deflection booster designed for TV and monitor applicati ons.
This device, suppl ied with up to 35 V, provides up to 2 App output current to drive the vertical deflection yoke.
The internal flyback generator delivers flyback voltages up to 70 V.
in double-supply applications, a stand-by state will be reached by stopping the (+) supply alone.
HEPTAWATT
(Plastic Package)
ORDER CODE: STV9302A
7 6 5 4 3 2 1
Tab connected
Input (Non Inverting) Output Stage Supply Output Ground Or Negative Supply Flyback Generator Supply Voltage Input (Inverting)
to pin 4
1
Thermal
Protection
6
4
3
5
STV9302A
+
-
Power
Amplifier
7
2
Flyback
Generator
Inverting
Non-Inverting
Input
Input
Ground or Negative Supply
Output
Flyback
Generator
Output Stage Supply
Voltage
Supply
Page 2
Absolute Maximum Ratings STV9302A
2/15
1 Absolute Maximum Ratings
Note:1. Usually the flyback v ol tage is sl ightly more t han 2 x VS. This must be taken into consideration when
setting
VS.
2. Versus pin 4
3. V3 is higher than V
S
during the first half of the flyback pulse.
4. Such repetitive output peak currents are usually observed just before and after the flyback pulse.
5. This non-repetitive output peak current can be ob served, f or e xampl e, during the Switch -On/Switch­Off phases. This peak current is acceptab le providi ng the SOA is respected (
Figure 8
and
Figure 9
).
6. All pins have a reverse diode towards pin 4, these diodes should never be forward-biased.
7. Input voltages must not exceed the lower value of either V
S
+ 2 or 40 volts.
2 Thermal Data
Symbol Parameter Value Unit
Voltage
V
S
Supply Voltage (pin 2) - Note 1 and Note 2 40 V
V
5
, V
6
Flyback Peak Voltage - Note 2 70 V
V
3
Voltage at Pin 3 - Note2, Note3 and Note6 -0.4 to (VS + 3) V
V
1
, V
7
Amplifier Input Voltage - Note 2, Note 6 and Note 7 - 0.4 to (VS + 2) or +40 V
Current
I0 (1) Output Peak Current at f = 50 to 200 Hz , t 10µs - Note 4 ±5 A I0 (2) Output Peak Current non-repetitive - Note 5 ±2 A
I
3
Sink Sink Current, t<1ms - Note 3 1.5 A
I3 Source Source Current, t < 1ms 1.5 A
I
3
Flyback pulse current at f=50 to 200Hz, t10µs - Note 4 ±5 A
ESD Susceptibility
ESD1 Human body model (100 pF discharged through 1.5 k)2kV ESD2 EIAJ Standard (200 pF discharged through 0 ) 300 V
Temperature
T
s
Storage Temperature -40 to 150 °C
T
j
Junction Temperature +150 °C
Symbol Parameter Value Unit
R
thJC
Junction-to-Case Thermal Resistance 3 °C/W
T
T
Temperature for Thermal Shutdown 150 °C
T
J
Recommended Max. Junction Temperature 120 °C
Page 3
3/15
STV9302A Electrical Characteris ti cs
3 Electrical Characteristics
(VS = 32 V, T
AMB
= 25°C, unless otherwise specified)
8. In normal applications, the peak flyback v olt age is slightly g reater than 2 x (VS - V4). Therefore , ( VS
- V
4
) = 35 V is not allowed without special circuitry.
9. Refer to
Figure 4
, Stand-by condition.
Symbol Parameter Test Conditions Min. Typ. Max. Unit Fig.
Supply
V
S
Operating Supply Voltage Range (V2-V4) Note 8 10 35 V
I
2
Pin 2 Quiescent Current I3 = 0, I5 = 0 5 20 mA 1
I
6
Pin 6 Quiescent Current I3 = 0, I5 = 0, V6 =35v 8 19 50 mA 1
Input
I
1
Input Bias Current V1 = 1 V, V7 = 2.2 V - 0.6 -1.5 µA1
I
7
Input Bias Current V1 = 2.2 V, V7 = 1 V - 0.6 -1.5 µA
V
IR
Operating Input Voltage Range 0 VS - 2 V
V
I0
Offset Voltage 2mV
V
I0
/dt Offset Drift versus Temperature 10 µV/°C
Output
I
0
Operating Peak Output Current ±1 A
V
5L
Output Saturation Voltage to pin 4 I5 = 1 A 1 1.7 V 3
V
5H
Output Saturation Voltage to pin 6 I5 = -1 A 1.8 2.3 V 2
Stand-by
V
5STBY
Output Voltage in Stand-by
V
1
= V7 = VS = 0
See Note 9
V
S
- 2
V
Miscellaneous
G Voltage Gain 80 dB
V
D5-6
Diode Forward Voltage Between pins 5-6 I5 = 1 A 1.4 2 V
V
D3-2
Diode Forward Voltage between pi ns 3-2 I3 = 1 A 1.3 2 V
V
3SL
Saturation Voltage on pin 3 I3 = 20 mA 0.4 1 V 3
V
3SH
Saturation Voltage to pin 2 (2nd part of flyback) I3 = -1 A 2.1 V
Page 4
Electrical Characteristics STV9302A
4/15
Figure 1: Measurement of I1, I2 and I
6
Figure 2: Measurement of V
5H
Figure 3: Measurement of V3L and V
5L
1V
(a)
39k
5
1
(b)
I1
(a): I2 and I6 measurement (b): I1 measurement
S
+Vs
2
6
I2 I6
4
7
2.2V
STV9302A
5.6k
- I5
5
1V
7
2.2V
1
4
+Vs
2
6
V
5H
STV9302A
+Vs
I3 or I5
3
5
V
5L
V
3L
(a)(b)
(a): V
5L
measurement
(b): V
3L
measurement
STV9302A
1V
7
4
2
6
2.2V
1
Page 5
5/15
STV9302A Application Hints
4 Application Hints
The yoke can be coupled either in AC or DC.
4.1 DC-coupled Application
When DC coupled (see Figure 4), the display v ertical position can be adj usted with input bias. On the other hand, 2 supply sources (V
S
and -VEE) are required.
A Stand-by state will be reached by switching OFF the posit ive supply alone. In this state, where both inputs are the same voltage as pin 2 or higher, t he output wil l sink negligible current from the deviation coil.
4.1.1 Application Hints
For calculatio ns, treat the IC as an op-amp, where the feedback loop maintains V1 = V7.
Figure 4: DC-coupled Application
R3
+Vs
R2
R1
Rd(*)
Yoke
Ly
Vertical Position
Adjustment
-V
EE
Vref
(*) recommended:
Ly
50µs
------------- R d
Ly
20µs
-------------<<
0.1µF
0.1µF
C
F
(47 to 100µF)
Power
Amplifier
Flyback
Generator
Thermal
Safety
470µF
470µF
Output
Current
Output
V oltage
I
p
000000000000000000
00000000000000000
7
32
5
6
1
4
V
M
V
m
+
-
0.22µF
1.5
Page 6
Application Hints STV9302A
6/15
4.1.1.1 Centering
Display will be centered (n ull mean current in yoke) when voltage on pin 7 is (R
1
is negligible):
4.1.1.2 Peak Current
Example: for V
m
=2V, VM = 5 V and IP =1A
Choose R
1
in the1 range, for instance R1=1
From equation of peak current:
Then choose R
2
or R3. For instance, if R2 = 10 k, then R3 = 15 k
Finally, the bias voltage on pin 7 should be:
4.1.2 Ripple Rejection
When both ramp signal and b ias are provided by the same driver IC, you can gain natural rejection of any ripple caused by a voltage drop in the ground (see Figure 5), if you manage to apply the same fraction of ripple voltage to both booster inputs. For that purpose, arrange an intermediate point in the bias resistor bridge, such that (R
8
/ R7) = (R3 / R2), and connect the bias filtering
capacitor between the intermediate point and the local driver ground. Of course, R
7
should be
connected to the booster reference point, which is the ground side of R
1
.
Figure 5: Ripple Rejection
V
7
VMVm+
2
------------------------
R
2
R2R3+
--------------------- -
ÿþ


×=
I
P
V
M
V
m
()
2
---------------------------- -
R
2
R1xR
3
------------------ -
×=
R
2
R
3
-------
2IPR
1
××
VMV
m
-----------------------------
2 3
-- -==
V
7
VMVm+
2
------------------------
1
1
R
3
R
2
-------+
-----------------
×
7 2
-- -
1
2.5
------- -
× 1.4V===
R
3
R
2
R
1
Rd
Yoke
Ly
Power
Amplifier
Flyback
Generator
Thermal
Safety
7
32
5
6
1
4
+
-
R
7
R
8
R
9
Reference V oltage
Ramp Signal
Driver Ground
Source of Ripple
Page 7
7/15
STV9302A Application Hints
4.2 AC-Coupled Applications
In AC-coupled applicat ions (See Figure 6), only one supply (VS) is needed. The vertical position of the scanning cannot be adjusted with input bias (for that purpose, usually some current is injected or sunk with a resistor in the low side of the yoke).
4.2.1 Application Hints
Gain is defined as in the previous case:
Choose R
1
then either R2 or R3. For good output centering, V7 must fulfill the following equation:
or
Figure 6: AC-coupled Application
R
3
+Vs
R
2
R
1
Rd(*)
Yoke
Ly
(*)
recommended:
Ly
50 µs
------------- R d
Ly
20µ s
-------------<<
0.1µF
C
F
(47 to 100µF)
Power
Amplifier
Flyback
Generator
Thermal
Safety
470µF
Output
Current
Output
Voltage
I
p
7
32
5
6
1
4
V
M
V
m
+
-
C
s
R
4
C
L
R
5
0.22µF
1.5
I
p
VMVm–
2
----------------------- -
R
2
R1R3×
--------------------- -
×=
V
S
2
------- -V
7
R4R
5
+
--------------------- -
V
7
VMVm+
2
------------------------
R
3
--------------------------------------
V
7
R
2
-------+=
V
7
1
R
3
-------
ÿ
1
R
2
-------+×
1
R4R5+
--------------------- -
þ
V
S
2R4R5+()
------------------------------
VMVm+
2R
3
×
------------------------+
ÿþ


=+
Page 8
Application Hints STV9302A
8/15
CS performs an integration of the parabol ic signal on CL, therefore the amount of S correct ion is set by the combination of C
L
and Cs.
4.3 Application with Differential-output Drivers
Certain driver ICs provide the ramp signal in differential form, as two current sources i+ and i− with opposite variations .
Let us set some definitions:
i
cm
is the common-mode current:
at peak of signal, i
+=icm
+ip and i−=icm -ip, therefore the peak differential signal is ip-(-
i
p
)=2ip, and the peak-peak differential signal, 4ip.
The application is described in Figure 7 with DC yoke coupling. The calculations still rely on the f act that V
1
remains equal to V7.
Figure 7: Using a Differential-output Driver
+Vs
R
2
R
1
Rd(*)
Yoke
Ly
-V
EE
0.22µF
(*)
recommended:
Ly
50µ s
------------- -Rd
Ly
20µ s
------------- -<<
0.1µF
0.1µF
C
F
(47 to 100µF)
Power
Amplifier
Flyback
Generator
Thermal
Safety
+
-
470µF
470µF
Output
Current
Output
Voltage
I
p
00000000000000000 00000000000000000
7
32
5
6
1
4
R
7
+
-
Differential output
driver IC
i
p
i
cm
-i
p
i
cm
1.5
i
cm
1 2
---i+i-+()=
Page 9
9/15
STV9302A Application Hints
4.3.1 Centring
When idle, both driver outputs provide icm and the yoke current should be null (R1 is negligible), hence:
4.3.2 Peak Current
Scanning current should be IP when positive and negative driver outputs provide respectively
i
cm-ip
and icm+ip, therefore
and since R
7
= R2:
Choose R
1
in the 1 range, the value of R2 = R7 follows. Remember that i is one-quarter of driver peak-peak differe ntial signal! Also check that the voltages on the driver outputs remain insi de allowed range.
Example: for i
cm
= 0.4mA, i = 0.2mA (corresponding to 0.8mA of peak-peak differential
current), I
p
=1A
Choose R
1
= 0.75Ω, it follows R2 = R7 = 1.875kΩ.
4.3.3 Ripple Rejection
Make sure to connect R7 directly to the ground side of R1.
4.3.4 Secondary Breakdown Diagrams
The diagram has been arbitrarily limited to max VS (35 V) and max I0 (2 A).
Figure 8: Output Transistor Safe Operating Area (SOA) for Secondary Breakdown
i
cmR7
i
cmR2
therefore R7R2==
i
cm
i–()R
7
I
p
R
1
icmi+()R
2
+=
I
p i
---- -
2R
7
R
1
-----------
=
100µs
10ms
100ms
0.01
0.1
1
10
10 60 100
Volts
Ic(A)
@ Tcase=25°C
35
Page 10
Mounting Instructions STV9302A
10/15
5 Mounting Instructions
The power dissipated in the circui t is removed by adding an external heatsink. With the HEPTAWATT
package, the heatsink is simply atta ched with a screw or a compression spring
(clip). A layer of silicon grease inserted between heatsink and package optimizes thermal contact. In DC-
coupled applications we recommend to use a silicone tape between the de vice tab and the heatsink to electrically isolate the tab.
Figure 9: Secondary Breakdown Temperature Derating Curve (ISB = Secondary Breakdown Current)
Figure 10: Mounting Examples
Page 11
11/15
STV9302A Pin Configuration
6 Pin Configuration
Figure 11: Pins 1 and 7
Figure 12: Pin 3 & Pins 5 and 6
1
7
2
3
2
6
5
4
2
Page 12
Package Mechanical Data STV9302A
12/15
7 Package Mechanical Data
Figure 13: 7-pin Heptawatt Package
Table 1: Heptawatt Package
Dim.
mm inches
Min. Typ. Max. Min. Typ. Max.
A 4.8 0.189 C 1.37 0.054 D 2.40 2.80 0.094 0.110
D1 1.20 1.35 0.047 0.053
E 0.35 0.55 0.014 0.022
E1 0.70 0.97 0.028 0.038
F 0.60 0.80 0.024 0.031
G 2.34 2.54 2.74 0.095 0.100 0.105 G1 4.88 5.08 5.28 0.193 0.200 0.205 G2 7.42 7.62 7.82 0.295 0.300 0.307 H2 10.40 0.409 H3 10.05 10.40 0.396 0.409
L 16.70 16.90 17.10 0.657 0.668 0.673
A
L
L1
C
D1
L5
L2 L3
D
E
M1
M
H3
Dia.
L7
L11
L10
L6
H2
F
GG1
G2
E1
F
E
L9
V4
L4
H2
Page 13
13/15
STV9302A Package Mechanical Data
L1 14.92 0.587 L2 21.24 21.54 21.84 0.386 0.848 0.860 L3 22.27 22.52 22.77 0.877 0.891 0.896 L4 1.29 0.051 L5 2.60 2.80 3.00 0.102 0.110 0.118 L6 15.10 15.50 15.80 0.594 0.610 0.622 L7 6.00 6.35 6.60 0.0236 0.250 0.260
L9 0.20 0.008 L10 2.10 2.70 0.082 0.106 L11 4.30 4.80 0.169 0.190
M 2.55 2.80 3.05 0.100 0.110 0.120
M1 4.83 5.08 5.33 0.190 0.200 0.210
V4 40 (Typ.)
Dia. 3.65 3.85 0.144 0.152
Table 1: Heptawatt Package (Continued)
Dim.
mm inches
Min. Typ. Max. Min. Typ. Max.
Page 14
Revision History STV9302A
14/15
8 Revision History
Table 2: Summary of Modifications
Version Date Description
2.0 January 2002 First Issue.
2.1 November 2002 Addition of Stand-by Control information, Section 8: Revision History.
2.2 April 2003 Correction to Section 4.1.1.2:P ea k Curren t. Creation of new title, Section
4.3.4: Secondary Breakdown Diagrams.
Page 15
15/15
STV9302A
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of pat ents o r oth er ri ght s of third parties which may result from its
use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously
supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without
express written approval of STMicroelectronics.
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