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| 型號(hào)： | ICE2AS01 |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 英文描述： | PWM-FF IC |
| 中文描述： | 脈寬調(diào)制集成電路法郎 |
| 文件頁數(shù)： | 14/24頁 |
| 文件大?。?/td> | 1291K |
| 代理商： | ICE2AS01 |
Version 2.0 14 1 Feb 2002
ICE2AS01/G
ICE2BS01/G
Functional Description
Figure 22
Overvoltage Detection
The overvoltage detection is provided by Comparator
C1 only in the first time during the Auto Restart Mode
till the Soft-Start voltage exceeds the threshold of the
Comparator C2 at 4.0V and the voltage at pin FB is
above 4.8V. When VCC exceeds 16.5V during the
overvoltage detection phase C1 can set the Error-Latch
and the Burst Phase during Auto Restart Mode is
finished earlier. In that case T
Burst2
is shorter than T
Soft-
. By means of C2 the normal operation mode is
prevented from overvoltage detection due to varying of
VCC concerning the regulation of the converter output.
When the voltage V
is above 4.0V the overvoltage
detection by C1 is deactivated.
3.8.3
Thermal Shut Down
Thermal Shut Down is latched by the Error-Latch when
junction temperature T
of the pwm controller is
exceeding an internal threshold of 140
°
C. In that case
the IC switches in Auto Restart Mode.
Note:
All the values which are mentioned in the
functional description are typical. Please refer
to Electrical Characteristics for min/max limit
values.
6.5V
C
Soft-Start
VCC
R
Soft-Start
4.0V
C1
16.5V
C2
T1
SoftS
G1
Error Latch
Power Up Reset
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相關(guān)代理商/技術(shù)參數(shù) |
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| ICE2AS01GNT | 制造商:Infineon Technologies AG 功能描述:Current Mode PWM Controller 8-Pin DSO |
| ICE2AS01GXT | 功能描述:初級(jí)與次級(jí)側(cè) PWM 控制器 CTRLR SMP SUPPLIES LOW POWER PFC 27V RoHS:否 制造商:ON Semiconductor 輸出端數(shù)量:1 開關(guān)頻率:250 KHz 工作電源電壓:- 0.3 V to + 28 V 最大工作溫度:+ 85 C 最小工作溫度:- 5 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Reel |
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