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参数资料
| 型号： | TNY377P |
| 厂商： | POWER INTEGRATIONS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 1.4 A SWITCHING REGULATOR, 280 kHz SWITCHING FREQ-MAX, PDIP7 |
| 封装： | PLASTIC, MS-001AB, DIP-8/7 |
| 文件页数： | 3/20页 |
| 文件大小： | 1076K |
| 代理商： | TNY377P |
Rev. A 05/07
11
TNY375-380
www.powerint.com
maximized for good heatsinking. Similarly, for axial output
diodes, maximize the PCB area connected to the cathode.
Y-Capacitor
The placement of the Y-capacitor should be directly from the
primary input filter capacitor positive terminal to the common/
return terminal of the transformer secondary. Such a placement
will route high magnitude common mode surge currents away
from the TinySwitch-PK device. Note – if an input π (C, L, C)
EMI filter is used, then the inductor in the filter should be placed
between the negative terminals on the input filter capacitors.
Optocoupler
Place the optocoupler physically close to the TinySwitch-PK
device to minimize the primary side trace lengths. Keep the
high current high voltage drain and clamp traces away from the
optocoupler to prevent noise pick up.
Output Diode
For best performance, the area of the loop connecting the
secondary winding, the Output Diode, and the Output Filter
Capacitor should be minimized. In addition, for axial diodes,
sufficient copper area should be provided at the anode and
cathode terminal of diode for heatsinking. A larger area is
preferred at the quiet cathode terminal. A large anode area can
increase high frequency radiated EMI.
Quick Design Checklist
As with any power supply design, all TinySwitch-PK designs
should be verified on the bench to make sure that component
specifications are not exceeded under worst case conditions.
The following minimum set of tests is strongly recommended:
Maximum drain voltage – Verify the V
DS does not exceed
650 V at highest input voltage and peak (overload) output
power. The 50 V margin to the 700 V BV
DSS specification
gives margin for design variation.
Maximum drain current – At maximum ambient temperature,
maximum input voltage, and peak output (overload) power,
verify drain current waveforms for any signs of transformer
saturation and excessive leading edge current spikes at
startup. Repeat under steady state conditions and verify that
the leading edge current spike event is below I
LIMIT(Min) at the
end of the t
LEB(Min). Under all conditions the maximum drain
current should be below the specified absolute maximum
ratings.
Thermal Check – At specified maximum output power,
minimum input voltage, and maximum ambient temperature,
verify that the temperature specifications are not exceeded
for TinySwitch-PK device, transformer, output diode, and
output capacitors. Enough thermal margin should be
allowed for part-to-part variation of the R
DS(ON) of TinySwitch-
PK device as specified in the datasheet. Under low-line
maximum power, a maximum TinySwitch-PK device
SOURCE pin temperature of 110 °C is recommended to
allow for these variations.
Design Tools
Up-to-date information on design tools can be found at the
Power Integrations web site: www.powerint.com.
1.
2.
3.
Figure 16. Layout Considerations for TinySwitch-PK Using P Package.
TOP VIEW
PI-4675-050707
Opto-
coupler
+
-
HV
+
-
DC
OUT
Input Filter Capacitor
Output
Rectifier
Safety Spacing
T
r
a
n
s
f
o
r
m
e
r
PRI
SEC
BIAS
R
UV
TinySwitch-PK
Bypass capacitor connection
to device should be short
Route connections to EN/UV pin
(including undervoltage resistor)
away from drain connected traces
Copper area for
heat sinking
Return bias winding
directly to input capacitor
Maximize hatched copper
areas (
) for optimum
heatsinking
BP
EN/UV
Y1-
Capacitor
S
PRI
C
BP
D
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TNY377PN | 功能描述:交流/直流开关转换器 23W 85-265 VAC 28 W 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 |
| TNY378G | 制造商:POWERINT 制造商全称:Power Integrations, Inc. 功能描述:Energy-Efficient, Off-Line Switcher With Enhanced Peak Power Performance |
| TNY378GN | 功能描述:交流/直流开关转换器 27 W (85-265 VAC) 34 W (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 |
| TNY378GN-TL | 功能描述:交流/直流开关转换器 27 W (85-265 VAC) 34 W (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 |
| TNY378P | 制造商:POWERINT 制造商全称:Power Integrations, Inc. 功能描述:Energy-Efficient, Off-Line Switcher With Enhanced Peak Power Performance |
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