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PDF TDA4865J Data sheet ( Hoja de datos )
| Número de pieza | TDA4865J | |
| Descripción | Vertical Deflection Booster | |
| Fabricantes | NXP Semiconductors | |
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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
1 page  
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NXP Semiconductors
TDA4865J; TDA4865AJ
Vertical deflection booster
In parallel with the deflection coil a damping resistor RP and an RC combination
(RS1 = 5.6 Ω and CS1 = 100 nF) are needed. Furthermore, another additional
RC combination (RS2 = 5.6 Ω and CS2 = 47 nF to 150 nF) can be used to minimize the
noise effect and the flyback time (see Figure 7 and Figure 8).
8. Internal circuitry
Table 4. Internal circuits
Symbol Pin Equivalent circuit
TDA4865J
VP1
VFB
VP2
GND
1
2
3
4
INP
7
VOUT 5
INN 6
INP 7
INN
6
VOUT
5
GND VP2
43
VFB
2
VP1
1
TDA4865AJ
VP1
VP3
VP2
GND
1
2
3
4
VOUT 5
INN 6
INP 7
INP
7
TDA4865J
001aad300
INN
VOUT GND VP2 VP3
VP1
6
5
43
2
1
TDA4865AJ
001aad301
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
TDA4865J_TDA4865AJ_2
Product data sheet
Table 9. Calculated values
Symbol
Value
TDA4865J
VP1
VN
Ptot
Pdefl
PIC
Rth(tot)(max)
Tj(max)[1]
tflb
8
−13
8.5
3.85
4.65
12.9
93
650
[1] With a heat sink of 2 K/W.
TDA4865AJ
15
−15
12.1
3.85
8.25
7.27
103.6
720
Unit
V
V
W
W
W
K/W
°C
µs
VP1, VN and VFB are referenced to ground of application; voltages are calculated with
+10 % tolerances.
The calculation formulae for supply voltages are as follows:
VP1 = – Vo(sat)p + (R1 + Rdeflcoil) × Idefl(max) – U'L + UD1
V N = Vo(sat)n + (R1 + Rdeflcoil) × Idefl(max) + U'L
(1)
(2)
where:
U’L = Ldeflcoil × 2Idefl(max) × fv
fv = vertical deflection frequency
UD1 = forward voltage drop across D1
The calculation formulae for power consumption is:
PIC = Ptot – Pdefl
Ptot = (V P1 – UD1) × -I--d---e--f--l4-(--m----a--x--) + V N × -I--d---e--f--l4-(--m----a--x--) + (V P1 + V N ) × 0.01 + 0.2
Pdefl
=
-R---d---e--f--l--c--o---i-l---+-----R----1-
3
×
I
2
d
e
fl(ma
x)
(3)
(4)
(5)
where:
PIC = power dissipation of the IC
Ptot = total power dissipation
Pdefl = power dissipation of the deflection coil
Calculation formulae for maximum required thermal resistance for the heat sink at
Tj(max) = 110 °C:
Rth(tot) = Rth( j-mb) + Rth(mb-h) + Rth(h-a)
Rth(h-a) = T-----j--(--m---a--P-x--)-I--–C-----T----a--m----b – Rth( j-mb) – Rth(mb-h)
Rev. 02 — 3 November 2006
(6)
(7)
© NXP B.V. 2006. All rights reserved.
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