TDA4865AJ Datasheet PDF - NXP

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TDA4865AJ
NXP

Part Number TDA4865AJ
Description Vertical Deflection Booster
Page 18 Pages


TDA4865AJ datasheet pdf
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TDA4865J; TDA4865AJ
Vertical deflection booster
Rev. 02 — 3 November 2006
Product data sheet
1. General description
The TDA4865J and TDA4865AJ are deflection boosters for use in vertical deflection
systems for frame frequencies up to 200 Hz.
The TDA4865J needs a separate flyback supply voltage, so the supply voltages are
independently adjustable to optimize power consumption and flyback time.
For the TDA4865AJ the flyback supply voltage will be generated internally by doubling the
supply voltage and therefore a separate flyback supply voltage is not needed.
Both circuits provide differential input stages.
2. Features
I Power amplifier with differential inputs
I Output current up to 3.8 A (p-p)
I High vertical deflection frequency up to 200 Hz
I High linear sawtooth signal amplification
I Flyback generator:
N TDA4865J: separate adjustable flyback supply voltage up to 70 V
N TDA4865AJ: internally doubled supply voltage (two supply voltages only for
DC-coupled outputs)
3. Quick reference data
Table 1.
Symbol
VP1
VP2
VFB
VP3
Vi(INN)
Vi(INP)
IP1
Quick reference data
Parameter
supply voltage 1
supply voltage 2
flyback supply voltage of
TDA4865J
flyback generator output
voltage of TDA4865AJ
input voltage on pin INN
input voltage on pin INP
supply current 1
Conditions
IVOUT = 1.9 A
during scan
Min
9
VP1 1
VP1 1
Typ
-
-
-
Max
35
70
70
Unit
V
V
V
0 - VP1 + 2.2 V
1.6 - VP1 0.5 V
1.6 - VP1 0.5 V
-
6 10
mA



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NXP Semiconductors
TDA4865J; TDA4865AJ
Vertical deflection booster
Table 1.
Symbol
IP2
IVOUT(p-p)
Tamb
Quick reference data …continued
Parameter
Conditions
quiescent supply
current 2
IVOUT = 0
vertical deflection output
current
(peak-to-peak value)
ambient temperature
4. Ordering information
Min Typ Max
- 25 60
- - 3.8
Unit
mA
A
20 -
+75
°C
Table 2. Ordering information
Type
number
Package
Name
Description
TDA4865J DBS7P
TDA4865AJ
plastic DIL-bent-SIL power package; 7 leads
(lead length 12/11 mm); exposed die pad
Version
SOT524-1
5. Block diagram
THERMAL
PROTECTION
TDA4865J
DIFFERENTIAL
INPUT
STAGE
VERTICAL
OUTPUT
FLYBACK
GENERATOR
REFERENCE
CIRCUIT
76
INP INN
from
deflection controller
R3
R2
5
VOUT
43
GND VP2
RS1 CS1
RP
deflection
coil
C1
R1
VN
Fig 1. Block diagram of TDA4865J
2
VFB
D1
1
VP1
C4 C2
R4
VF VP
001aad 296
TDA4865J_TDA4865AJ_2
Product data sheet
Rev. 02 — 3 November 2006
© NXP B.V. 2006. All rights reserved.
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NXP Semiconductors
TDA4865J; TDA4865AJ
Vertical deflection booster
THERMAL
PROTECTION
TDA4865AJ
DIFFERENTIAL
INPUT
STAGE
76
INP INN
VERTICAL
OUTPUT
FLYBACK
GENERATOR
5
VOUT
43
GND VP2
RS1 CS1
CF
2
VP3
from
deflection controller
deflection
RP coil
R3
R5
C1
R1
R2 VN
Fig 2. Block diagram of TDA4865AJ
6. Pinning information
6.1 Pinning
REFERENCE
CIRCUIT
1
VP1
D1
C2
R6
VP
001aad 297
VP1
VFB
VP2
GND
VOUT
INN
INP
1
2
3
4
5
6
7
TDA4865J
001aad 298
Fig 3. Pin configuration for DBS7P
(TDA4865J)
VP1
VP3
VP2
GND
VOUT
INN
INP
1
2
3
4
5
6
7
TDA4865AJ
001aad 299
Fig 4. Pin configuration for DBS7P
(TDA4865AJ)
TDA4865J_TDA4865AJ_2
Product data sheet
Rev. 02 — 3 November 2006
© NXP B.V. 2006. All rights reserved.
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NXP Semiconductors
TDA4865J; TDA4865AJ
Vertical deflection booster
6.2 Pin description
Table 3.
Symbol
VP1
VFB
VP3
VP2
GND
VOUT
INN
INP
Pin description
Pin
TDA4865J TDA4865AJ
11
2-
-2
33
44
55
66
77
Description
positive supply voltage 1
flyback supply voltage
flyback generator output
supply voltage 2 for vertical output
ground or negative supply voltage
vertical output
inverted input of differential input stage
non-inverted input of differential input stage
7. Functional description
Both the TDA4865J and TDA4865AJ consist of a differential input stage, a vertical output
stage, a flyback generator, a reference circuit and a thermal protection circuit.
The TDA4865J operates with a separate flyback supply voltage (see Figure 1) while the
TDA4865AJ generates the flyback voltage internally by doubling the supply voltage
(see Figure 2).
7.1 Differential input stage
The differential sawtooth input current signal (from the deflection controller) is connected
to the inputs (inverted signal to pin INN and non-inverted signal to pin INP). The vertical
feedback signal is superimposed on the inverted signal on pin INN.
7.2 Vertical output and thermal protection
The vertical output stage is a quasi-complementary class-B amplifier with a high linearity.
The output stage is protected against thermal overshoots. For a junction temperature of
Tj > 150 °C the protection will be activated and will reduce the deflection current (IVOUT).
7.3 Flyback generator
The flyback generator supplies the vertical output stage during flyback.
The TDA4865J is used with a separate flyback supply voltage to achieve a short flyback
time with minimized power dissipation.
The TDA4865AJ needs a capacitor (CF) connected between pins VP3 and VP2 (see
Figure 2). Capacitor CF is charged during scan, using the external diode D1 and resistor
R5. During flyback the cathode of capacitor CF is connected to the positive supply voltage
and the flyback voltage is then twice the supply voltage. For the TDA4865AJ the
resistor R6 in the positive supply line can be used to reduce the power consumption.
TDA4865J_TDA4865AJ_2
Product data sheet
Rev. 02 — 3 November 2006
© NXP B.V. 2006. All rights reserved.
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NXP
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