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參數(shù)資料
| 型號(hào)： | ICE1QS01 |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Controller for Switch Mode Power Supplies Supporting Low Power Standby and Power Factor Correction (PFC) |
| 中文描述： | 控制器開(kāi)關(guān)電源支持低功耗待機(jī)和功率因數(shù)校正（PFC物料供應(yīng)） |
| 文件頁(yè)數(shù)： | 7/21頁(yè) |
| 文件大?。?/td> | 484K |
| 代理商： | ICE1QS01 |
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ICE1QS01
Version 1.4
7
27 Apr 2004
Soft start
The internal reference of the IC is switched on when V
CC
exceeds the V
CCon
threshold. The IC
begins to work with soft start mode. Soft start is realized with an internal soft start resistor, an inter-
nal current sink, a current source and the external feedback capacitor connected at pin SRC. The
internal resistor is connected between the internal voltage reference and pin SRC. The current sink
is connected between pin SRC and GND. The value of the current is set with a timer. Immediately
after the IC is switched on the capacitor C
SRC
is charged with a current source up to 2.5V. This cur-
rent source is switched off 12 μsec after beginning of soft start. The current value of the current sink
is set with a timer. Every three msec the current of the current sink is reduced and so V
SRC
can
increase stepwise. The soft start is finished 24 msec after the IC is switched on. At the end of the
soft start the current sink is switched off.
Figure: Soft Start
PCS (primary current simulation)
A voltage proportional to the current of the power transistor is generated at Pin PCS by the RC-com-
bination R2, C2. The voltage at Pin PCS is forced to 1.5V when the power transistor is switched off
and during its switch on time C2 is charged by R2 from the rectified mains. The relation of V
PCS
and
ton
tp1
tp2
VCCon
VSRC1
VSRC2
VSRC
VCC
t
t
20k
pin SRC
current
sink
up
down
counter
D/A
timer
tp=3ms
2.5V
ICE1QS01
timer
t=12us
500
5V
timer
t=24ms
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| ICE1QS01G | 功能描述:軟開(kāi)關(guān) PWM 控制器 PWM-QR CONTROL IC FOR SMPS RoHS:否 制造商:Fairchild Semiconductor 輸出端數(shù)量: 輸出電流: 開(kāi)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 |
| ICE1QS01GNT | 制造商:Infineon Technologies AG 功能描述:Controller Switch Mode Power Supply 8-Pin DSO |
| ICE1QS01GXT | 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 CTRLR SMP SUPPLIES LOW POWER PFC 20V 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(kāi)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 |
| ICE1QS01XK | 制造商:Infineon Technologies AG 功能描述:Controller Switch Mode Power Supply 8-Pin PDIP |
| ICE200 | 制造商:Atmel Corporation 功能描述:IN-CIRCUIT EMULATOR |
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