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參數(shù)資料
| 型號： | tDa 4601 |
| 廠商： | SIEMENS AG |
| 英文描述： | Control ICs for Switched-Mode Power Supplies(應(yīng)用于開關(guān)電源的控制類芯片) |
| 中文描述： | 控制芯片的開關(guān)電源（應(yīng)用于開關(guān)電源的控制類芯片） |
| 文件頁數(shù)： | 4/26頁 |
| 文件大?。?/td> | 1384K |
| 代理商： | TDA 4601 |
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Semiconductor Group
10
TDA 4601
The output levels of the control amplifier as well as those of the overload identification and collector
current simulator are compared in the trigger and forwarded to the control logic. Via pin 5 it is
possible to externally inhibit the operations of the IC. The output at pin
pin 8 will be inhibited when voltages of
≤
– 0.1 are present at pin 5.
Flipflops for controlling the base current amplifier and the base current shut-down are set in the
control logic depending on the start-up circuit, the zero passage identification as well as on the
enabling by the trigger. The base current amplifier forwards the sawtoothspahed
V
4
voltage to the
output of pin 8. A current feedback with an external resistor (
R
= 0.68
) is present between pin 8
and pin 7. The applied value of the resistor determines the max. amplitude of the base driving
current for the switching transistor.
Protective Operating Mode
The base current shut-down activated by the control logic clamps the output of pin 7 to 1.6 V. As a
result, the drive of the switching transistor is inhibited. This protective measure is enabled if the
supply voltage at pin 9 reaches a value
≤
6.7 V or if voltages of
≤
– 0.1 are present at pin 5.
In case of short-circuits occurring in the secondary windings of the switched-mode power supply,
the integrated circuit continuously monitors the fault conditions. During secondary, completely load-
free operation only a small pulse duty factor is set. As a result the total power consumption of the
power supply is held at
N
= 6 ... 10 W during both operating modes. After the output has been
inhibited for a voltage supply of
≤
6.7 V, the reference voltage (4 V) is switched off if the voltage
supply is further reduced by
V
9
= 0.6 V.
Protective Operating Mode at Pin 5 in Case of Disturbance
The protection against disturbances such as primary undervoltages and/or secondary over-
voltages (e.g. by changes in the component parameters for the switched-mode power supply) is
realized as follows:
Protective Operating Mode with Continuous Fault Condition Monitoring
In case of disturbance the output pulses at pin 8 are inhibited by falling below the protective
threshold
V
5
, with a typical value of
V
1
/2. As a result current consumption is reduced (
I
9
≥
14 mA
at
V
9
= 10 V).
With a corresponding
high-impedance
start-up resistor *), supply voltage
V
9
will fall below the
minimum shut-down threshold (5.7 V) for reference voltage
V
1
.
V
1
will be switched off and current
consumption is further reduced to
I
9
≤
3.2 mA at
V
9
≤
10 V.
Because of these reductions in current consumption, the supply voltage can rise again to reach the
switch-on threshold of
V
9
≥
12.3 V. The protective threshold at pin 5 is released and the power
supply is again ready for operation.
V
2
-----------
V
2
-----------
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA4601-D | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:Control ICs for Switched-Mode Power Supplies |
| TDA4605 | 功能描述:視頻 IC SMPS Controller RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| TDA4605_03 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:CONTROL CIRCUIT FOR SWITCH MODE POWER SUPPLIES USING MOS TRANSISTORS |
| TDA46052 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| TDA4605-2 | 功能描述:軟開關(guān) PWM 控制器 CTRL IC FOR SWITCH MODE PWR SUPPLIES RoHS:否 制造商:Fairchild Semiconductor 輸出端數(shù)量: 輸出電流: 開關(guān)頻率: 工作電源電壓:30 V 電源電流: 最大工作溫度:+ 105 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
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