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| 型號(hào)： | TDA4865AJ |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類(lèi)： | 偏轉(zhuǎn) |
| 英文描述： | eflection boosters for use in vertical deflection systems for frame frequencies up to 200 Hz. |
| 中文描述： | VERTICAL DEFLECTION IC, PZFM7 |
| 封裝： | PLASTIC, SOT-524-1, DIL-BENT-SIL, 7 PIN |
| 文件頁(yè)數(shù)： | 4/18頁(yè) |
| 文件大?。?/td> | 105K |
| 代理商： | TDA4865AJ |
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TDA4865J_TDA4865AJ_2
NXP B.V. 2006. All rights reserved.
Product data sheet
Rev. 02 — 3 November 2006
4 of 18
NXP Semiconductors
TDA4865J; TDA4865AJ
Vertical deflection booster
6.2 Pin description
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
T
j
> 150
°
C the protection will be activated and will reduce the deflection current (I
VOUT
).
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 (C
F
) connected between pins V
P3
and V
P2
(see
Figure 2
). Capacitor C
F
is charged during scan, using the external diode D1 and resistor
R5. During flyback the cathode of capacitor C
F
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.
Table 3.
Symbol
Pin description
Pin
TDA4865J
1
2
-
3
4
5
6
7
Description
TDA4865AJ
1
-
2
3
4
5
6
7
V
P1
V
FB
V
P3
V
P2
GND
VOUT
INN
INP
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
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| TDA4865J | 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:eflection boosters for use in vertical deflection systems for frame frequencies up to 200 Hz. |
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| TDA4866/V5,112 | 制造商:NXP Semiconductors 功能描述: |
| TDA4867 | 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Full bridge current driven vertical deflection booster |
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