參數(shù)資料
型號(hào)： TNY277PG
廠(chǎng)商： POWER INTEGRATIONS INC
元件分類(lèi)： 穩(wěn)壓器
英文描述： 0.481 A SWITCHING REGULATOR, PDIP7
封裝： ROHS COMPLIANT, PLASTIC, MS-001AB, DIP-8/7
文件頁(yè)數(shù)： 20/24頁(yè)
文件大?。?/td> 1024K
代理商： TNY277PG
Rev. I 01/09
5
TNY274-280
www.powerint.com
In a typical implementation, the EN/UV pin is driven by an
optocoupler. The collector of the optocoupler transistor is
connected to the EN/UV pin and the emitter is connected to the
SOURCE pin. The optocoupler LED is connected in series with
a Zener diode across the DC output voltage to be regulated.
When the output voltage exceeds the target regulation voltage
level (optocoupler LED voltage drop plus Zener voltage), the
optocoupler LED will start to conduct, pulling the EN/UV pin
low. The Zener diode can be replaced by a TL431 reference
circuit for improved accuracy.
ON/OFF Operation with Current Limit State Machine
The internal clock of the TinySwitch-III runs all the time. At the
beginning of each clock cycle, it samples the EN/UV pin to
decide whether or not to implement a switch cycle, and based
on the sequence of samples over multiple cycles, it determines
the appropriate current limit. At high loads, the state machine
sets the current limit to its highest value. At lighter loads, the
state machine sets the current limit to reduced values.
V
DRAIN
V
EN
CLOCK
DC
DRAIN
I
MAX
PI-2749-082305
Figure 6.
Operation at Near Maximum Loading.
V
DRAIN
V
EN
CLOCK
DC
DRAIN
I
MAX
PI-2667-082305
Figure 7.
Operation at Moderately Heavy Loading.
Figure 8.
Operation at Medium Loading.
PI-2377-082305
V
DRAIN
V
EN
CLOCK
DC
DRAIN
I
MAX
PI-2661-082305
V
DRAIN
V
EN
CLOCK
DC
DRAIN
I
MAX
Figure 9.
Operation at Very Light Load.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TNY277PN 功能描述:交流/直流開(kāi)關(guān)轉(zhuǎn)換器 18.5W 85-265 VAC 23.5W/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
TNY277PN-TL 制造商:POWERINT 制造商全稱(chēng):Power Integrations, Inc. 功能描述:Energy Efficient, Off-Line Switcher with Enhanced Flexibility and Extended Power Range
TNY277PTL 制造商:POWERINT 制造商全稱(chēng):Power Integrations, Inc. 功能描述:Energy Efficient, Off-Line Switcher with Enhanced Flexibility and Extended Power Range
TNY278G 制造商:POWERINT 制造商全稱(chēng):Power Integrations, Inc. 功能描述:Energy Efficient, Off-Line Switcher with Enhanced Flexibility and Extended Power Range
TNY278GN 功能描述:交流/直流開(kāi)關(guān)轉(zhuǎn)換器 21.5W 85-265 VAC 28W/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
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