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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)： | 3/26頁 |
| 文件大?。?/td> | 1384K |
| 代理商： | TDA 4601 |
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Semiconductor Group
9
TDA 4601
Circuit Description
The TDA 4601 is designed for driving, controlling and protecting the switching transistor in flyback
converter power supplies during start-up, normal and overload operations as well as during
disturbed operation. In case of disturbance the drive of the switching transistor is inhibited and a
secondary voltage rise is prevented.
Start-Up
The start-up procedures (on-mode) include three consecutive operating phases as follows:
1. Build-Up of Internal Reference Voltage
The internal reference voltage supplies the voltage regulator and effects charging of the coupling
electrolytic capacitor connected to the switching transistor. Current consumption will remain at
I
9
< 3.2 mA with a supply voltage up to
V
9
approx. 12 V.
2. Enabling of Internal Voltage - Reference Voltage
V
1
= 4 V
Simultaneously with
V
9
reaching approx. 12 V, an internal voltage becomes available, providing
all component elements, with the exception of the control logic, with a thermally stable and
overload-resistant current supply.
3. Enabling of Control Logic
In conjunction with the generation of the reference voltage, the current supply for the control logic
is activated by means of an additional stabilization circuit. The integrated circuit is then ready for
operation.
The start-up phase above described are necessary for ensuring the charging of the coupling
electrolytic capacitor, which in turn supplies the switching transistor. Only then is it possible to
ensure that the transistor switches accurately.
Normal Operating Mode / Control Operating Mode
At the input of pin 2 the zero passages of the frequency provided by the feedback coil are registered
and forwarded to the control logic. Pin 3 (control input, overload and standby identification) receives
the rectified amplitude fluctuations of the feedback coil. The control amplifier operates with an input
voltage of approx. 2 V and a current of approx. 1.4 mA. Depending on the internal voltage reference,
the overload identification limits inconjunction with collector current simulator pin 4 the operating
range of the control amplifier. The collector current is simulated by an external RC-combination
present at pin 4 and internally set threshold voltages. The largest possible collector current
applicable to the switching transistor (point of return) increases in proportion to the increased
capacitance (10 nF). Thus the required operating range of the control amplifier is established. The
range of control lies between a DC-voltage clamped at 2 V and a sawtooth - shaped rising AC-
voltage, which can vary up to a max. amplitude of 4 V (reference voltage). During secondary load
reduction to approx. 20 W, the switching frequency is increased (approx. 50 kHz) at an almost
constant pulse duty factor (1:3). During additional secondary load decreases to approx. 1 W, the
switching frequency increases to approx. 70 kHz and pulse duty factor to approx. 1:11. At the same
time collector peak current is reduced to < 1 A.
相關(guān)PDF資料 |
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| TDA 4605-2 | Control IC for Switched-Mode Power Supplies using MOS-transistors(開關(guān)模式電源控制IC) |
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| TDA6131XS | Mixer/Oscillator |
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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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