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| 型號： | TOP234P |
| 英文描述： | Analog IC |
| 中文描述： | 模擬IC |
| 文件頁數(shù)： | 19/36頁 |
| 文件大?。?/td> | 650K |
| 代理商： | TOP234P |
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TOP232-234
B
7/01
19
Key Application Considerations
TOPSwitch-FX
vs.
TOPSwitch-ll
Table 3 compares the features and performance differences
between
TOPSwitch
-
FX
and
TOPSwitch-II
. Many of the new
features eliminate the need for costly discrete component.
Other features increase the robustness of design allowing cost
savings in the transformer and other power components.
*Not available
Table 3. Comparison Between TOPSwitch-II and TOPSwitch-FX. (continued on next page)
Function
TOPSwitch-II
TOPSwitch-FX
Figures Advantages
Soft-Start
N/A*
10 ms
Limits peak current and voltage
component stresses during start-up
Eliminates external components
used for soft-start in most
applications
Minimizes output overshoot
Smaller transformer
Higher efficiency
Allows tighter power limit
during output overload conditions
Smaller input cap (wider dynamic
range)
Higher power capability (when used
with RCD clamp for large V
)
Allows use of Schottky secondary
rectifier diode for up to 15 V output
for high efficiency
4, 8, 14,
Rejects line ripple
23
Increases transient and surge
voltage withstand capability
8, 14,
Increases voltage withstand cap-
16, 23
ability against line surge
5, 8, 14,
Prevents auto-restart glitches
15, 23
during power down
10
Smaller transformer
Fundamental below 150 kHz for
conducted EMI
11, 12
Lower losses when using RC and
RCD snubber for noise reduction in
video applications
Allows for higher efficiency in
standby mode
Lower EMI (second harmonic below
150 kHz)
6, 28
Reduces conducted EMI
External Current Limit
N/A*
Programmable
100% to 40% of
default current
limit
78%
8, 17,
18, 21,
22
DC
MAX
67%
4
Line Feed Forward with
DC
MAX
Reduction
N/A*
78% to 38%
Line OV Shutdown
N/A*
Single resistor
programmable
Single resistor
programmable
132 kHz
±
7%
Line UV Detection
N/A*
Switching Frequency
100 kHz
±
10%
Switching Frequency
Option (TO-220 only)
N/A*
66 kHz
±
7%
Frequency Jitter
N/A*
±
4 kHz@132 kHz
±
2 kHz@66 kHz
At DC
MIN
(1.5%)
Cycle Skipping
N/A*
4
Zero load regulation without dummy
load
Low power consumption at no load
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| TOP234PN | 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 20W 85-265 VAC 30W 230 VAC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel |
| TOP234Y | 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 45W 85-265 VAC 75W 230 VAC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel |
| TOP234YN | 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 45W 85-265 VAC 75W 230 VAC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel |
| TOP242 | 制造商:POWERINT 制造商全稱:Power Integrations, Inc. 功能描述:Family Extended Power, Design Flexible,Integrated Off-line Switcher |
| TOP242-249 | 制造商:POWERINT 制造商全稱:Power Integrations, Inc. 功能描述:Family Extended Power, Design Flexible,Integrated Off-line Switcher |
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