參數(shù)資料
型號(hào)： TOP245P
英文描述： Up to 290 W Extended power. design flexible.
中文描述： 高達(dá)290瓦的擴(kuò)展能力。設(shè)計(jì)靈活。
文件頁(yè)數(shù)： 24/52頁(yè)
文件大?。?/td> 468K
代理商： TOP245P
TOP242-250
24
K
9/03
printers, scanners, external modems, disk drives, etc., as needed
from a computer. Peripherals are usually designed to turn off
automatically if they are not being used for a period of time, to
save power.
Data Sheets 2
Application Notes 3
Design Ideas 4
Design Tools 5
Power
Supply
Control
Quality and Reliability 6
Package Information 7
DPA-SwitchDC-DC Seminar 8
Status
LTV817A
LinkSwitch & TinySwitch-IIAC-DC Seminar 9
TOPSwitch-GXAC-DC Seminar 10
Sales Representatives and Distributors 11
Processor Controlled Supply Turn On/Off
A low cost momentary contact switch can be used to turn the
TOPSwitch-GX
power on and off under microprocessor
control that may be required in some applications such as
printers. The low power remote off feature allows an elegant
implementation of this function with very few external
components as shown in Figure 45. Whenever the push button
momentary contact switch P1 is closed by the user, the
optocoupler U3 is activated to inform the microprocessor of
this action. Initially, when the power supply is off (M pin is
floating), closing of P1 turns the power supply on by shorting
the M pin of the
TOPSwitch-GX
to SOURCE through a diode
(remote on). When the secondary output voltage VCC is
established, the microprocessor comes alive and recognizes that
the switch P1 is closed through the switch status input that is
driven by the optocoupler U3 output. The microprocessor then
sends a power supply control signal to hold the power supply
in the on-state through the optocoupler U4. If the user presses
the switch P1 again to command a turn off, the microprocessor
detects this through the optocoupler U3 and initiates a shutdown
procedure that is product specific. For example, in the case of
the inkjet printer, the shutdown procedure may include safely
parking the print heads in the storage position. In the case of
products with a disk drive, the shutdown procedure may include
saving data or settings to the disk. After the shutdown procedure
is complete, when it is safe to turn off the power supply, the
microprocessor releases the M pin by turning the optocoupler
U4 off. If the manual switch and the optocouplers U3 and U4
are not located close to the M pin, a capacitor C
may be needed
to prevent noise coupling to the pin when it is open.
The power supply could also be turned on remotely through a
local area network or a parallel or serial port by driving the
optocoupler U4 input LED with a logic signal. Sometimes it is
easier to send a train of logic pulses through a cable (due to AC
coupling of cable, for example) instead of a DC logic level as
a wake up signal. In this case, a simple RC filter can be used to
generate a DC level to drive U4 (not shown in Figure 45). This
remote on feature can be used to wake up peripherals such as
Figure 45. Remote ON/OFF using Microcontroller.
U1
U2
U4
U3
C
M
1 nF
P1
External
Signal
PI-2561-042303
V
CC
(+5 V)
RETURN
CONTROL
PRMICRO
LOGIC
LOGIC
High Voltage
DC Input
+
-
TOPSwitch-GX
D
M
S
F
C
1N4148
U4
LTV817A
6.8 k
27 k
1N4148
47
μ
F
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TOP245P- 制造商:POWERINT 制造商全稱(chēng):Power Integrations, Inc. 功能描述:TOPSwitch-GX Family Extended Power, Design Flexible, EcoSmart, Integrated Off-line Switcher
TOP245P_1 制造商:POWERINT 制造商全稱(chēng):Power Integrations, Inc. 功能描述:Title 32W (47W peak) Multiple Output supply
TOP245PN 功能描述:交流/直流開(kāi)關(guān)轉(zhuǎn)換器 22W 85-265 VAC 30 W 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(kāi)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
TOP245PN- 制造商:POWERINT 制造商全稱(chēng):Power Integrations, Inc. 功能描述:TOPSwitch-GX Family Extended Power, Design Flexible, EcoSmart, Integrated Off-line Switcher
TOP245PN0152 制造商:Power Integrations 功能描述:
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