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参数资料
| 型号： | TNY278PN |
| 厂商： | Power Integrations |
| 文件页数： | 5/24页 |
| 文件大小： | 0K |
| 描述： | IC OFFLINE SWIT OVP OTP HV 8DIP |
| 标准包装： | 50 |
| 系列： | TinySwitch®-III |
| 输出隔离： | 隔离 |
| 频率范围： | 124kHz ~ 140kHz |
| 输出电压： | 700V |
| 功率（瓦特）： | 28W |
| 工作温度： | -40°C ~ 150°C |
| 封装/外壳： | 8-DIP（0.300"，7.62mm），7 引线 |
| 供应商设备封装： | DIP-8C |
| 包装： | 管件 |
| 产品目录页面： | 1203 (CN2011-ZH PDF) |
| 配用： | 596-1194-ND - KIT DESIGN REF TINYSWITCH-III |
| 其它名称： | 596-1094-2 596-1094-2-ND 596-1094-5 |
TNY274-280
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.
V
EN
CLOCK
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
EN
CLOCK
DC
MAX
DC
MAX
I DRAIN
V DRAIN
PI-2749-082305
I DRAIN
V DRAIN
PI-2667-082305
Figure 6.
Operation at Near Maximum Loading.
Figure 7.
Operation at Moderately Heavy Loading.
V
EN
CLOCK
V
EN
CLOCK
DC
MAX
DC
MAX
I DRAIN
V DRAIN
PI-2377-082305
I DRAIN
V DRAIN
PI-2661-082305
Figure 8.
Operation at Medium Loading.
Figure 9.
Operation at Very Light Load.
5
www.powerint.com
Rev. I 01/09
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TNY278PN-TL | 制造商:POWERINT 制造商全称:Power Integrations, Inc. 功能描述:Energy Efficient, Off-Line Switcher with Enhanced Flexibility and Extended Power Range |
| TNY278PTL | 制造商:POWERINT 制造商全称:Power Integrations, Inc. 功能描述:Energy Efficient, Off-Line Switcher with Enhanced Flexibility and Extended Power Range |
| TNY279G | 制造商:POWERINT 制造商全称:Power Integrations, Inc. 功能描述:Energy Efficient, Off-Line Switcher with Enhanced Flexibility and Extended Power Range |
| TNY279GN | 功能描述:交流/直流开关转换器 25W 85-265 VAC 32W/230 VAC RoHS:否 制造商:STMicroelectronics 输出电压:800 V 输入/电源电压（最大值）:23.5 V 输入/电源电压（最小值）:11.5 V 开关频率:115 kHz 电源电流:1.6 mA 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:SSO-10 封装:Reel |
| TNY279GN0152-TL | 制造商:Power Integrations 功能描述: |
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