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參數資料
| 型號： | Q67006-A8369-A703 |
| 廠商： | SIEMENS AG |
| 英文描述： | ZENER - 5.1V, 5%, 1W, AXIAL |
| 中文描述： | 功率因數控制器功率因數校正集成電路高功率因數，有源諧波濾波器 |
| 文件頁數： | 6/17頁 |
| 文件大小： | 194K |
| 代理商： | Q67006-A8369-A703 |
TDA 4862
Semiconductor Group
6
1998-02-16
Functional Description
(cont’d)
Undervoltage Lockout
An undervoltage lockout circuitry enables the output stage when
V
CC
reaches the upper
threshold
V
CC
and terminates the output stage when
V
CC
is falling below the lower
threshold
V
CCL
. In the standby mode the supply current is typically 75
μ
A. An internal
clamp has been added from
V
CC
to ground to protect the IC from an overvoltage
condition. The external circuitry is created with a start-up resistor connected from
V
CC
to
the input supply voltage and a storage capacitor from
V
CC
to ground. Bootstrap power
supply is created with the previous mentioned auxiliary winding and a diode.
Output
The TDA 4862 totem pole output stage is MOSFET compatible. An internal protection
circuitry is activated when
V
CC
is within the stand by mode and ensures that the MOSFET
is turned-OFF. The totem pole output has been optimized to minimize cross conduction
current during high speed operation. The addition of two 4
resistors, one in series with
the source output transistor and one in series with the sink output transistor, reduces the
cross conduction current.
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