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参数资料
| 型号： | TNY277PG |
| 厂商： | POWER INTEGRATIONS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 0.481 A SWITCHING REGULATOR, PDIP7 |
| 封装： | ROHS COMPLIANT, PLASTIC, MS-001AB, DIP-8/7 |
| 文件页数： | 20/24页 |
| 文件大小： | 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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相关代理商/技术参数 |
参数描述 |
|---|---|
| TNY277PN | 功能描述:交流/直流开关转换器 18.5W 85-265 VAC 23.5W/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 |
| TNY277PN-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 |
| TNY277PTL | 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 |
| TNY278G | 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 |
| TNY278GN | 功能描述:交流/直流开关转换器 21.5W 85-265 VAC 28W/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 |
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