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| 型号： | CPC1580P |
| 厂商： | IXYS Integrated Circuits Division |
| 文件页数： | 9/13页 |
| 文件大小： | 0K |
| 描述： | OPTOCOUPLER 2.5MA 8-PIN FLTPCK |
| 标准包装： | 50 |
| 电压 - 隔离： | 3750Vrms |
| 通道数： | 1，单向 |
| 电流 - DC 正向(If)： | 1mA |
| 输入类型： | DC |
| 输出类型： | 栅极驱动器 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SMD，鸥翼型 |
| 供应商设备封装： | 8-扁平封装 |
| 包装： | 管件 |
I NTEGRATED C IRCUITS D IVISION
across the load element is recommended, see
The energy not consumed in switching losses must be
absorbed by the over-voltage protection element. Most
protective devices are designed to withstand certain
peak power, in the case of a Transient Voltage
Suppressor (TVS); or maximum avalanche energy, in
the case of a MOSFET. Understanding the switching
losses and load dynamics is absolutely essential.
One simple way to reduce the amount of stored
inductive energy is to increase the energy dissipated
in the switch. This can be accomplished by adding a
larger capacitor in parallel with the gate-drain
connection of the MOSFET, however care must be
taken so that the rise time and peak current do not
CPC1580
The consequence of increasing the gate-drain
effective capacitance is reduced dV/dt tolerance.
When used in a circuit with an inductive load,
precautions must be taken to prevent damage to the
circuit from inductively generated voltage spikes. The
circuit shown in Figure 3 includes such protection
across the inductive load.
5.1 Other Protection Techniques
Switching loads with higher inductance characteristics
requires consideration of other circuit protection
techniques, device ratings, or protector types. Of
paramount importance is that the designer know the
characteristics of the load being switched.
exceed the Safe Operating Area (SOA) rating of the
transistor.
Figure 3. CPC1580 Over-Voltage Protection for Inductive Loads
D OVP
CPC1580
8 V CAP
C ST
1
4
NC
NC
7
V D
R OVP
Z LOAD
+V LOAD
C OVP
V IN +
V IN -
R LED
2
LED +
3
LED -
5
6
V G
V S
Q1
-V LOAD
6. Application Switching Losses
During the transition intervals, the application and load
components change energy states and, in the
process, incur switching losses. The switching losses
are manifested as heat in the application circuit and
must be addressed by the designer to ensure that no
one component exceeds its power rating. The
designer must understand the details of the load
behavior in order to adequately size and protect the
application circuit. There are three general cases to
observe: (1) purely resistive loads,
(2) inductive/resistive loads, and (3) loads with
significant capacitance. Inductors and capacitors are
energy storage elements that require special
consideration for switching.
During the switching periods, energy is conserved.
Inductors turning off transfer their stored energy to
MOSFET switching losses, to the capacitance of the
load and application circuit, and to the protector.
During the turn-on interval, the inductor energy is zero,
and so the capacitive energy in the load and parasitic
elements of the switching application must be
R01
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| CPC1590PTR | 功能描述:逻辑输出光电耦合器 Optically Isolated Gate Driver, Tape/Reel RoHS:否 制造商:Fairchild Semiconductor 绝缘电压:4243 Vrms 输出类型:Push-Pull 最大传播延迟时间:500 ns 最大正向二极管电压: 最大反向二极管电压: 最大正向二极管电流: 最大连续输出电流:2.5 A 最大功率耗散:100 mW 最大工作温度:+ 100 C 最小工作温度:- 40 C 封装 / 箱体:SO-16 封装:Tube |
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