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參數(shù)資料
| 型號(hào)： | TOP221G |
| 廠商： | POWER INTEGRATIONS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | CONNECTOR ACCESSORY |
| 中文描述： | 0.28 A SWITCHING REGULATOR, 110 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | SMD-8 |
| 文件頁數(shù)： | 6/20頁 |
| 文件大?。?/td> | 176K |
| 代理商： | TOP221G |
TOP221-227
C
12/97
6
Figure 7. Schematic Diagram of a 4W TOPSwitch-II Stand-by Power Supply using an 8 lead PDIP.
Application Examples
Following are just two of the many possible
TOPSwitch
implementations. Refer to the Data Book and Design Guide for
additional examples.
4W Stand-by Supply using 8 Lead PDIP
Figure 7 shows a 4W stand-by supply. This supply is used in
appliances where certain stand-by functions (e.g. real time
clock, remote control port) must be kept active even while the
main power supply is turned off.
The 5V secondary is used to supply the stand-by function and
the 12V non-isolated output is used to supply power for the
PWM controller of the main power supply and other primary
side functions.
For this application the input rectifiers and input filter are sized
for the main supply and are not shown. The input DC rail may
vary from 100V to 380V DC which corresponds to the full
universal AC input range. The TOP221 is packaged in a 8 pin
power dip package.
The output voltage (5V) is directly sensed by the zener diode
(VR1) and the optocoupler (U2). The output voltage is determined
by the sum of the zener voltage and the voltage drop across the
LED of the optocoupler (the voltage drop across R1 is negligible).
The output transistor of the optocoupler drives the CONTROL
pin of the TOP221. C5 bypasses the CONTROL pin and provides
control loop compensation and sets the auto-restart frequency.
The transformer’s leakage inductance voltage spikes are snubbed
by R3 and C1 through diode D1. The bias winding is rectified
and filtered by D3 and C4 providing a non-isolated 12V output
which is also used to bias the collector of the optocoupler’s
output transistor. The isolated 5V output winding is rectified by
D2 and filtered by C2, L1 and C3.
Wide-Range
DC Input
D
S
C
CONTROL
PI-2115-111797
+
-
R3
47K
D1
UF4005
C1
2.2 nF
1KV
D2
UF5401
TOP221P
L1
3.3
μ
H
D3
IN4148
C4
100
μ
F
16V
U2
PC817A
R1
10
C3
100
μ
F
10V
+5V
C5
47
μ
F
10V
C2
330
μ
F
10V
U1
R2
100
VR1
T OPS witc h-II
T1
RTN
+
-
12V Non-Isolated
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TOP221P | CONNECTOR ACCESSORY |
| TOP222G | CONNECTOR ACCESSORY |
| TOP222P | CONNECTOR ACCESSORY |
| TOP223G | CONNECTOR ACCESSORY |
| TOP224G | Three-terminal Off-line PWM Switch |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TOP221GN | 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 6W 85-265 VAC 9W100/115/230 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 |
| TOP221GN-TL | 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 6W 85-265 VAC 9W100/115/230 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 |
| TOP221G-TL | 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 6W 85-265 VAC 9W100/115/230 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 |
| TOP221P | 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 6W 85-265 VAC 9W100/115/230 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 |
| TOP221PN | 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 6W 85-265 VAC 9W100/115/230 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 |
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