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參數資料
| 型號： | TDA16846 |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 英文描述： | ICs for Consumer Electronics |
| 中文描述： | 消費電子集成電路 |
| 文件頁數： | 9/28頁 |
| 文件大小： | 351K |
| 代理商： | TDA16846 |
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TDA 16846
TDA 16847
Data Sheet
9
2000-01-14
Figure 5
Startup Voltage Diagram
Primary Current Simulation PCS (Pin 2) / Current Limiting
A voltage proportional to the current of the power transistor is generated at Pin 2 by the
RC-combination
R
2
,
C
2
(
Figure 4
). The voltage at Pin 2 is forced to 1.5 V when the
power transistor is switched off and during its switch on time
C
2
is charged by
R
2
from
the rectified mains. The relation of
V
2
and the current in the power transistor (
I
primary
) is
:
L
primary
: Primary inductance of the transformer
The voltage
V
2
is applied to one input of the On Time Comparator ONTC (see
Figure 2
).
The other input is the control voltage. If
V
2
exceeds the control voltage, the driver
switches off (current limiting). The maximum value of the control voltage is the internal
reference voltage 5 V, so the maximum current in the power transistor (
I
Mprimary
) is
:
The control voltage can be reduced by either the Error Amplifier EA (current mode
regulation), or by an opto coupler at Pin 5 (regulation with opto coupler isolation) or by
the voltage
V
11
at Pin 11 (Fold Back Point Correction).
AED02650
t
Startup
Operation
14
V
V
max
On
V
V
Off
V
2
1,5 V
L
primary
-------------------------------
I
primary
C
2
×
×
R
2
+
=
I
Mprimary
3,5 V
--------------------------------------
R
×
C
2
×
L
primary
=
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TDA16846_03 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:Controller for Switch Mode Power Supplies Supporting Low Power Standby and Power Factor |
| TDA16846-2 | 功能描述:功率因數校正 IC CTRLR FOR SWITCH MODE PWR SUPPLIES RoHS:否 制造商:Fairchild Semiconductor 開關頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| TDA168462G | 制造商:Infineon Technologies AG 功能描述: |
| TDA16846-2G GEG | 功能描述:功率因數校正 IC CTRLR FOR SWITCH MODE PWR SUPPLIES RoHS:否 制造商:Fairchild Semiconductor 開關頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| TDA168462GGEGHUMA1 | 制造商:Infineon Technologies AG 功能描述:Power Factor Correction PWM CONTRLR 1mA 14-Pin DSO 制造商:Infineon Technologies AG 功能描述:IC POWER SUPPLY CONTROLLER DSO14 |
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