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參數(shù)資料
| 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(yè)數(shù)： | 13/24頁(yè) |
| 文件大?。?/td> | 1291K |
| 代理商： | ICE2AS01 |
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Version 2.0 13 1 Feb 2002
ICE2AS01/G
ICE2BS01/G
Functional Description
Figure 20
FB-Detection
The detection is activated by C4 when the voltage at
pin SoftS exceeds 5.3V. Till this time the IC operates in
the Soft-Start Phase. After this phase the comparator
C3 can set the Error-Latch in case of open loop or
overload which leads the feedback voltage V
to
exceed the threshold of 4.8V. After latching VCC
decreases till 8.5V and inactivates the IC. At this time
the external Soft-Start capacitor is discharged by the
internal transistor T1 due to Power Down Reset. When
the IC is inactive VCC increases till V
= 13.5V by
charging the Capacitor C
by means of the Start-Up
Resistor R
. Then the Error-Latch is reset by
Power Up Reset and the external Soft-Start capacitor
C
Soft-Start
is charged by the internal pullup resistor R
Soft-
Start
voltage at pin SoftS exceeds 5.3V the detection of
overload and open loop by C3 and G2 is inactive. In this
way the Start Up Phase is not detected as an overload.
But the Soft-Start Phase must be finished within the
Start Up Phase to force the voltage at pin FB below the
failure detection threshold of 4.8V.
3.8.2
Overvoltage due to open loop with
no load
Figure 21
Auto Restart Mode
Figure 21 shows the Auto Restart Mode for open loop
and no load condition. In case of this failure mode the
converter output voltage increases and also VCC. An
additional protection by the comparators C1, C2 and
the AND-gate G1 is implemented to consider this
failure mode (see Figure 22).
R
Soft-Start
6.5V
C
Soft-Start
C4
5.3V
C3
4.8V
G2
T1
Error-Latch
Power Up Reset
R
FB
6.5V
FB
SoftS
Open loop & no load condition
t
Driver
13.5V
16.5V
FB
4.8V
5μs Blanking
Failure
Detection
5.3V
SoftS
4.0V
Overvoltage
Detection Phase
Soft-Start Phase
t
t
T
Restart
T
Burst2
VCC
8.5V
Overvoltage Detection
t
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ICE2AS01G | PWM-FF IC |
| ICE2BS01 | PWM-FF IC |
| ICE2BS01G | PWM-FF IC |
| ICE3A1065L | Off-Line SMPS Current Mode Controller with integrated 650V Startup Cell/Depletion CoolMOS⑩ and Latched off Mode |
| ICE3B0365L | Off-Line SMPS Current Mode Controller with integrated 650V Startup Cell/Depletion CoolMOS⑩ and Latched off Mode |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICE2AS01_06 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:Off-Line SMPS Current Mode Controller |
| ICE2AS01G | 功能描述:初級(jí)與次級(jí)側(cè) PWM 控制器 SMPS ICS 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 |
| ICE2AS01GHUMA1 | 制造商:Infineon Technologies AG 功能描述:ELECTRONIC INTEGRATED CIRCUITS - Tape and Reel |
| 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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