參數(shù)資料
型號： ICE3A1065L
廠商： INFINEON TECHNOLOGIES AG
英文描述： Off-Line SMPS Current Mode Controller with integrated 650V Startup Cell/Depletion CoolMOS⑩ and Latched off Mode
中文描述： 離線式開關(guān)電源電流模式控制器，集成了?650V啟動細(xì)胞/消耗的CoolMOS⑩和鎖存關(guān)閉模式
文件頁數(shù)： 11/28頁
文件大?。?/td> 525K
代理商： ICE3A1065L
CoolSET-F3
ICE3xxx65L
Functional Description
Version 2.0
11
8 May 2006
current. That means the propagation delay time
between exceeding the current sense threshold V
csth
and the switch off of the internal CoolMOS is
compensated over temperature within a wide range.
Current Limiting is now possible in a very accurate way.
E.g. I
peak
= 0.5A with R
Sense
= 2. Without Propagation
Delay Compensation the current sense threshold is set
to a static voltage level V
=1V. A current ramp of
dI/dt = 0.4A/μs, that means dV
Sense
/dt = 0.8V/μs, and a
propagation delay time of i.e. t
Propagation Delay
=180ns
leads then to an I
overshoot of 14.4%. By means of
propagation delay compensation the overshoot is only
about 2% (see Figure 12).
Figure 12
Overcurrent Shutdown
The Propagation Delay Compensation is realized by
means of a dynamic threshold voltage V
csth
(see Figure
13). In case of a steeper slope the switch off of the
driver is earlier to compensate the delay.
Figure 13
Dynamic Voltage Threshold V
csth
3.6
Control Unit
The Control Unit contains the functions for Active Burst
Mode, Auto Restart Mode and Latched Off Mode. The
Active Burst Mode and the Auto Restart Mode are
combined with an Adjustable Blanking Window which is
depending on the external Soft Start capacitor. By
means of this Adjustable Blanking Window, the IC
avoids entering into these two modes accidentally.
Furthermore it also provides a certain time whereby the
overload detection is delayed. This delay is useful for
applications which normally works with a low current
and occasionally require a short duration of high
current.
3.6.1
Adjustable Blanking Window
Figure 14
Adjustable Blanking Window
V
SoftS
is clamped at 4.4V by the closed switch S1 after
the SMPS is settled. If overload occurs V
is
exceeding 4.8V. Auto Restart Mode can’t be entered as
the gate G5 is still blocked by the comparator C3. But
after V
has exceeded 4.8V the switch S1 is opened
via the gate G2. The external Soft Start capacitor can
now be charged further by the integrated pull up
resistor R
. The comparator C3 releases the gates
G5 and G6 once V
Softs
has exceeded 5.4V. Therefore
there is no entering of Auto Restart Mode possible
during this charging time of the external capacitor
0,9
0,95
1
1,05
1,1
1,15
1,2
1,25
1,3
0
0,2
0,4
0,6
0,8
1
dV
Sense
1,2
1,4
1,6
1,8
2
with compensation
without compensation
dt
s
V
μ
S
V
V
t
V
csth
V
OSC
Signal1
Signal2
V
Sense
Propagation Delay
max. Duty Cycle
off time
t
C3
5.4V
C4
4.8V
C6
1.30V
&
G5
&
G6
4.4V
S1
&
G4
1
G2
Control Unit
5k
Active
Burst
Mode
Auto
Restart
Mode
R
SoftS
6.5V
SoftS
FB
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ICE3A1065LJ 功能描述:電流型 PWM 控制器 CoolSET F3 650V RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14
ICE3A1065LJHKLA1 制造商:Infineon Technologies AG 功能描述:Current Mode PWM Controller 650V 1A 8-Pin PDIP 制造商:Infineon Technologies AG 功能描述:IC OFFLINE CTRLR SMPS OTP 8DIP
ICE3A1065LXK 制造商:Infineon Technologies AG 功能描述:Current Mode PWM Controller 8-Pin PDIP
ICE3A1065XK 制造商:Infineon Technologies AG 功能描述:Current Mode PWM Controller 650V 1A 8-Pin PDIP
ICE3A1565 功能描述:電流型 PWM 控制器 Off-Line SMPS Currnt Mode CTRLR 650V RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14
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