参数资料
型号: IR21381QPBF
厂商: International Rectifier
文件页数: 22/30页
文件大小: 0K
描述: IC CTLR AC MOTOR 3PHASE 64-MQFP
标准包装: 660
配置: 3 相桥
输入类型: 反相和非反相
延迟时间: 550ns
电流 - 峰: 350mA
配置数: 1
输出数: 3
高端电压 - 最大(自引导启动): 600V
电源电压: 12.5 V ~ 20 V
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 64-MQFP,64-PQFP
供应商设备封装: 64-MQFP(20x14)
包装: 带卷 (TR)
IR22381Q PBF /IR21381Q ( P b F )
power transistor is fully on, the sensing diode gets
forward biased and the voltage at the DSH/L pin
decreases. At this point the biasing circuit
deactivates, in order to reduce the bias current of the
diode as shown in Figure 21.
and one turn off stage for SSD operation (both
connected to HON/LON).
When the driver turns on the IGBT (see Figure 16), a
first stage is constantly activated (HOP/LOP) while
an additional stage is maintained active only for a
limited time (t ON1 , HOQ/LOQ). This feature boost the
total driving capability in order to accommodate both
fast gate charge to the plateau voltage and dV/dt
control in switching.
At turn off, a single n-channel sinks up to 460mA (I O- )
and offers a low impedance path to prevent the self-
turn on due to the parasitic Miller capacitance in the
power switch.
1.7
Voltage FeedBack
Voltage feedback pins provide information about the
Figure 21: R DSH/L Active Biasing
1.6 Output stage
The structure is shown in Figure 19 and consists of
two turn on stages (connected to HOP/LOP and
HOQ/LOQ), one turn off stage for normal operation
state of the corresponding IGBT by means of
sensing its collector.
The V DESAT threshold discriminates whether the
sensed IGBT can be considered on (DSH/L <
V DESAT ) or off (DSH/L > V DESAT ).
IGBT state information is then sent to VFH/L 1,2,3
open collector outputs, which are tied to Vss
ground.
See Figure 22 for functional details.
Figure 22 : Voltage feedback functional diagram
22
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