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参数资料
| 型号： | TDA8354Q/N2 |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 偏转 |
| 英文描述： | VERTICAL DEFLECTION IC, PZIP13 |
| 封装： | POWER, PLASTIC, SOT-141-6, DIL-BENT-SIL, 13 PIN |
| 文件页数： | 14/18页 |
| 文件大小： | 154K |
| 代理商： | TDA8354Q/N2 |
1998 Sep 03
5
Philips Semiconductors
Preliminary specication
Full bridge current driven vertical deection
output circuit in LVDMOS
TDA8354Q
Guard circuit
A guard circuit with output signal Vo(guard) is provided.
The guard circuit generates an active HIGH level during
the flyback period. The guard circuit is also activated for
one or more of the following conditions:
When the thermal protection is activated (Tj ≈ 170 °C)
During short-circuit of the output pins (pins 5 and 9) to
VP or ground
During open coil
During open loop
During short-circuit of the input pins (pins 11 and 12) to
VP or ground.
An active HIGH level of the guard signal is also generated
for the next conditions:
No drive signal
Short-circuit of the coil.
However, for these events the signal is generated via an
internal timer circuit. The guard signal set via this timer has
a delay of
≈120 ms. The delay time is given by the lowest
applicable field frequency.
The guard signal can be used for blanking the picture tube
screen and signalling a fault condition.
Damping resistor compensation
For HF-loop stability a damping resistor is connected
across the deflection coil. There is a big difference in
current in the damping resistor Rp during scan and flyback.
The resistor current is summed to the current in the
deflection coil via the measuring resistor RM, which results
in a too low current in the deflection coil at the start of the
scan.
To reach a short settling time the difference in the current
during scan and flyback in the damping resistor can be
compensated for by external means. To do so a resistor
(Rcomp) of about 1 M can be connected between the
output of stage A (pin 9) and the damping resistor
compensation current input (pin 13).
For a more accurate calculation of Rcomp refer to the
following formula:
R
comp
V
flb
V
loss
–
V
P
–
() R
p
×
R
con
×
V
flb
V
loss
–
I
L
R
L
×
–
() R
M
×
---------------------------------------------------------------------------------
=
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TDA8356 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:DC-coupled vertical deflection circuit |
| TDA8356/N6,112 | 功能描述:视频 IC DC COUPLED VERT RoHS:否 制造商:Fairchild Semiconductor 工作电源电压:5 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-28 封装:Reel |
| TDA8356U | 功能描述:视频 IC DC COUPLED VERT DEFLECTION CIR RoHS:否 制造商:Fairchild Semiconductor 工作电源电压:5 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-28 封装:Reel |
| TDA8357 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Full bridge vertical deflection output circuit in LVDMOS |
| TDA8357J | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Full bridge vertical deflection output circuit in LVDMOS |
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