STMICROELECTRONICS TEA2037A

TEA2037A
HORIZONTAL AND VERTICAL DEFLECTION MONITOR
..
.
.
..
.
..
DIRECT LINE DARLINGTON DRIVE
DIRECT FRAME-YOKE DRIVE (± 1A)
COMPOSITE VIDEO SIGNAL INPUT CAPABILITY
FRAME OUTPUT PROTECTION AGAINST
SHORT CIRCUITS
PLL
HORIZONTAL OSCILLATOR FREQUENCY
RANGE FROM 15kHz TO 100kHz
VERTICAL
OSCILLATOR
FREQUENCY
RANGE FROM 30Hz TO 120Hz
VERY FEW EXTERNAL COMPONENT
VERY LOW COST POWER PACKAGE
POWERDIP (8+8)
(Plastic Package)
ORDER CODE : TEA2037A
DESCRIPTION
The TEA2037Ais an horizontal and vertical deflection circuit. It uses the same concept as TEA2117
but optimised for small screens, for a very low cost
solution.
FRAME OSCILLATOR
1
16
V CC1
FLYBACK GENERATOR SUPPLY
2
15
VIDEO INPUT
FRAME FLYBACK
3
14
LINE OUTPUT
GROUND
4
13
GROUND
GROUND
5
12
GROUND
INVERTING INPUT
6
11
LINE FLYBACK
FRAME POWER SUPPLY
7
10
PHASE DETECTOR
FRAME OUTPUT
8
9
LINE OSCILLATOR
September 1996
2037A-01.EPS
PIN CONNECTIONS
1/9
TEA2037A
BLOCK DIAGRAM
1
16
7
FRAME
OSCILLATOR
4
2
FLYBACK
GENERATOR
-
FRAME
5
+
POWER
STAGE
3
FRAME-SYNC.
OSCILLATOR
SEPARATOR
12
6
13
15
Yoke
8
INPUT
STAGE
PHASE
DETECTOR
LINE
OSCILLATOR
OUTPUT
STAGE
14
TEA2037A
11
10
9
2037A-02.EPS
V CC1
Symbol
VCC1
V2
V7
I8nr
I8
V14
Ip14
IC14
Tstg
Tj
Parameter
Supply Voltage
Flybcak Generator Supply Voltage
Frame Power Supply Voltage
Frame Output Current (non repetitive)
Frame Output Current (continuous)
Line Output Voltage (external)
Line Output Peak Current
Line Output Continuous Current
Storage Temperature
Max. Operating Junction Temperature
Value
30
35
60
± 1.5
±1
60
0.8
0.4
-40, +150
+150
Unit
V
V
V
A
A
V
A
A
o
C
o
C
2037A-01.TBL
ABSOLUTE MAXIMUM RATINGS
THERMAL DATA
Tj
Parameter
Junction-case Thermal Resistance
Junction-ambient Thermal Resistance
2
(soldered on a 35µm thick 45cm PC board copper area)
Recommended Junction Temperature
Max.
Typ.
Value
15
45
Max.
120
Unit
C/W
o
C/W
o
o
C
2037A-02.TBL
Symbol
R th (j-c)
R th (j-a)
ELECTRICAL CHARACTERISTICS (Tamb = 25oC)
Symbol
Parameter
Min.
Typ.
Max.
Unit
10
9
-280
9.8
50
20
10.5
+280
5
mA
V
mV
V
ICC1
VCC1
∆VCC1
LPS
2/9
Supply Current
Supply Voltage (ICC1 = 15mA)
Voltage Variation (ICC1 : 10mA to 20mA)
Starting Threshold for Line Output Pulses
2037A-03.TBL
SUPPLY (shunt regulator) (Pin 16)
TEA2037A
ELECTRICAL CHARACTERISTICS (Tamb = 25oC) (continued)
Symbol
Parameter
Min.
Typ.
Max.
Unit
Reference Voltage (I15 = -1µA)
Minimum Width of Frame Pulse (when synchronized with TTL Signal)
Sync Bottom to Black Level (RSYNC 15 = 560kΩ)
1.4
50
0.2
1.75
2
V
µs
VPP
2.8
5.4
3.2
6.6
100
1.4
64
3.6
7.8
V
V
nA
kΩ
µs
VIDEO INPUT (Pin 15)
V15
MWF
VIN
0.3
LINE OSCILLATOR (Pin 9)
LT9
HT9
BI9
DR9
FLP1
FLP2
OT9
∆F
∆θ
Low Threshold Voltage
High Threshold Voltage
Bias Current
Discharge Impedance
Free Running Line Period
(R = 34.9kΩ Tied to VCC1, C = 2.2nF Tied to Ground)
Free Running Line Period (R = 13.7kΩ, C = 2.2nF)
Oscillator Threshold for Line Output Pulse Triggering
1.0
62
Horizontal Frequency Drift with Temperature (see application Fig. 8)
1.8
66
27
4.6
µs
V
2
Hz/ C
o
LINE OUTPUT (Pin 14)
LV14
OPW
Saturation Voltage (I14 = 200mA)
Output Pulse Width (line period = 64µs)
20
1.1
22
1.6
24
V
µs
1.8
4.5
2.4
5.8
3.2
8
V
kΩ
250
0.95
-2
2.60
450
1
800
1.05
+2
7.10
µA
1.6
2.6
2.0
3.1
30
470
23
2.3
3.6
V
V
nA
kΩ
ms
LINE FLYBACK INPUT (Pin 11)
V11
Z11
Bias Voltage
Input Impedance
PHASE DETECTOR
I10
RI10
LI10
CV10
Output Current during Synchro Pulse
Current Ratio (positive/negative)
Leakage Current
Control Range Voltage
µA
V
FRAME OSCILLATOR (PIn 1)
LT1
HT1
BI1
DR1
FFP1
MFP
FFP2
FPR
FG
∆F
∆θ
Low Threshold Voltage
High Threshold Voltage
Bias Current
Discharge Impedance
Free Running Line Period
(R = 845kΩ Tied to VCC1, C = 180nF Tied to Ground)
Minimum Frame Period (I 15 = -100µA) (with the same RC)
Free Running Line Period (R = 408kΩ, C = 220nF)
Frame Period Ratio =
Frame Saw-tooth Gain between Pin 1 and non-inverting Input of the
Frame Amplifier
300
20.5
1.7
12.8
14.3
1.8
-0.4
700
25
ms
ms
1.9
4 ⋅ 10-3
Vertical Frequency Drift with Temperature (see application Fig. 8)
Hz/oC
V7
I7
Operating Voltage (with flyback generator)
Supply Current (V7 = 30V)
10
58
22
V
mA
10
30
V
FLYBACK GENERATOR SUPPLY (PIn 2)
V2
Operating Voltage
3/9
2037A-04.TBL
FRAME POWER SUPPLY (Pin 7)
TEA2037A
ELECTRICAL CHARACTERISTICS (Tamb = 25oC) (continued)
Symbol
Parameter
Min.
Typ.
Max.
Unit
0.0.6
0.37
0.6
1
V
V
1.3
1.7
1.6
2.4
V
V
1.6
2.5
2.1
4.5
V
V
1.5
3.0
0.8
2.2
2.1
4.5
1.1
4.5
V
V
V
V
170
µA
FRAME OUTPUT (PIn 8)
LV8A
LV8B
HV8A
HV8B
FV8A
FV8B
Saturation Voltage to Ground (V7 = 30V)
I8 = 0.1
I8 = 1A
Saturation Voltage to V7 (V7 = 30V)
I8 = -0.1
I8 = -1A
Saturation Voltage to V7 in Flyback Mode (V8 > V7)
I8 = 0.1
I8 = 1A
F2DA
F2DB
FSVA
FSVB
FCI
Flyback Transistor on (output = high state) (V2 = 30V)
V3/2 with I3 → 2 = 0.1A
I3 → 2 = 1A
V2/3 with I3 → 2 = 0.1
I3 → 2 = 1A
Flyback Transistor off (output = V7 - 8V) (V7 = V2 = 30V)
Leakage Current Pin 2
2037A-05.TBL
FLYBACK GENERATOR (Pins 2 and 3)
The slice level of sync-separation is fixed by value
of the external resistors R 1 and R2. VR is an internally fixed voltage.
The sync-pulse allows the discharge of the capacitor by a 2 x 1 current. A line sync-pulse is not able
to discharge the capacitor underVZ/2. Aframe sync
pulse permits the complete discharge of the capacitor, so during the frame sync-pulse Q3 and Q4
provide current for the other parts of the circuit.
The TEA2037A performs all the video and power
functions required to provide signals for the direct
drive of the line darlington and frame yoke.
It contains :
- A shunt regulator
- A synchronization separator
- An integrated frame separator without external
components
- A saw-tooth generator for the frame
- A power amplifier for direct drive of frame yoke
(short circuit protected)
- An open collector output for the line darlington drive
- A line phasedetectorand a voltage control oscillator
Figure 2 : Frame Separator
VZ
Figure 1 : Synchronization Separator Circuit
Q3
I
ST1
Q4
ST2
VZ/2
3I
SL1 SL2
SL1
R1
15
R2
4/9
2037A-03.EPS
Video
The oscillator thresholds are internally fixed by
resistors. The discharge of the capacitor depends
on the internal resistor R4. The control voltage is
applied on resistor R5.
2037A-04.EPS
VR
TEA2037A
Figure 3 : Line Oscillator
VCC1
Phase
Comparator
Output
R5
9
2037A-05.EPS
R4
Figure 4 : Phase Comparator
current for the other part. When the line flyback and
the video signal are synchronized, the output of the
comparatoris an alternativelynegative and positive
current. The frame sync-pulse inhibits the comparator to prevent frequency drift of the line oscillator
on the frame beginning.
Line
Flyback
Figure 5
Integrated
Flyback
VCC1
VC
11
10
Sync Pulse
ST2
ST1
2037A-07.EPS
The sync-pulse drives the current in the comparator. The line flyback integrated by the external
network gives on pin 11 a saw tooth, the DC offset
of this saw tooth is fixed by VC. The comparator
output provides a positive current for the part of the
signal on pin 11 greater than to VC and a negative
VC
2037A-06.EPS
Output
Current
5/9
TEA2037A
Line Output (pin 14)
It is an open collector output which is able to drive
pulse current of 800mA for a rapid discharging of
the darlington base. The output pulse time is 22µs
for a 64µs period.
The oscillator thresholds are internally fixed by
resistors. The oscillator is synchronized during the
last half free run period. The input current during
the charge of the capacitor is less than 100nA.
Frame Output Amplifier
This amplifier is able to drive directly the frame
yoke. Its output is short circuit and overload protected ; it contains also a thermal protection.
Figure 6 : Frame Oscillator
VCC1
INPUT CURRENT
COMPENSATION
1
To Frame
Amplifier
6/9
2037A-08.EPS
Frame
Sync Pulse
TEA2037A
TYPICAL APPLICATION FOR DISPLAY UNITS
Figure 7 : Application without flyback generator and with sync-pulse drive ; yoke : 72mH, 40Ω
1kΩ
VCC1
820kΩ
VCC
28V
100µF
180nF
16
4
5
12
13
2
7
3
10kΩ
15
100nF
2.2Ω
1
1kΩ
8
TEA2037A
22nF
470kΩ
11
10
9
2.2nF
1µF
10Ω
VCC
33.2kΩ
2.2nF
220nF
14
100kΩ
56kΩ
470Ω
1/2W
470µF
6.8Ω
47nF
3.9kΩ
470kΩ
6
100Ω
2.2µF
VCC1
47Ω
2037A-09.EPS
15kΩ
1N4148
Figure 8 : Application with flyback generator and video ; yoke : 72mH, 40Ω
1kΩ
VCC1
820kΩ
VCC
28V
100µF
1N4003
47µF
180nF
100nF 1.5kΩ
4
5
12 13
2
7
3
470kΩ
9
680pF
10Ω
VCC
33.2kΩ
3.9kΩ
1 µF
2.2nF
470µF
220nF
14
100kΩ
470Ω
1/2W
56kΩ
2.2µF
VCC1
47Ω
2037A-10.EPS
10
2.2nF
470kΩ
6
6.8Ω
11
1kΩ
TEA2037A
22nF
47nF
100nF
8
15
100Ω
560kΩ
15kΩ
16
2.2Ω
1N4148
1
Video
1N4148
7/9
TEA2037A
TYPICAL APPLICATION FOR HIGH FREQUENCY MONITOR
CHARACTERISTICS
• Capture range : ± 5µs
(@ sync pulse = 4.7µs)
• Input signal : negative TTL sync (line + frame)
• Dissipated power : 1.4W
(heatsink required)
• Adjustments :
• Vertical amplitude
• Vertical Linearity
• Vertical frequency
• Horizontal frequency
• Screen : 14’’ Colour
• Frame deflection yoke : 11mH, 7Ω,
750mA peak–to–peak
• VCC = + 14V with flyback generator
• Frame flyback time : 0.6ms
• Vertical frequency : 72Hz
• Vertical free–running period : 16ms
(adjustable)
• Horizontal frequency : 35kHz
(adjustable)
• Line flyback time : 5.5µs
2.2kΩ
270kΩ
VCC
14V
VCC1
1000µF
470kΩ
470kΩ
P3
100µF
1N4002
47µF
100nF
150nF
12 13
2
7
3
8
TEA2037A
22nF
39kΩ
11
6
68kΩ
9
14
47kΩ
22kΩ
P4
VCC
10Ω
1 µF
1nF
22kΩ
3.9kΩ
680pF
6.8nF
220Ω
1/2W
18kΩ
P1
2.2µF
Line
Darlington
47Ω
VCC1
2200µF
330nF
1N4148
2037A-11.EPS
10
1Ω
47nF
8/9
Frame Yoke
11mH/7Ω
47kΩ
100Ω
15kΩ
5
15
Sync
Line
Flyback
4
180Ω
10kΩ
16
2.2Ω
1N4148
1
TEA2037A
PM-DIP16.EPS
PACKAGE MECHANICAL DATA
16 PINS - PLASTIC POWERDIP
a1
B
b
b1
D
E
e
e3
F
I
L
Z
Min.
0.51
0.85
Millimeters
Typ.
Max.
1.40
Min.
0.020
0.033
0.50
0.38
Inches
Typ.
Max.
0.055
0.020
0.50
20.0
0.015
8.80
2.54
17.78
0.020
0.787
0.346
0.100
0.700
7.10
5.10
3.30
0.280
0.201
DIP16PW.TBL
Dimensions
0.130
1.27
0.050
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility
for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result
from its use. No licence is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics.
Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all
information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life
support devices or systems without express written approval of SGS-THOMSON Microelectronics.
 1996 SGS-THOMSON Microelectronics - All Rights Reserved
Purchase of I2C Components of SGS-THOMSON Microelectronics, conveys a license under the Philips
I2C Patent. Rights to use these components in a I2C system, is granted provided that the system conforms to
the I2C Standard Specifications as defined by Philips.
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