参数资料
型号: IRS21844SPBF
厂商: International Rectifier
文件页数: 8/30页
文件大小: 0K
描述: IC DRIVER HALF-BRIDGE 14-SOIC
标准包装: 55
配置: 半桥
输入类型: 非反相
延迟时间: 680ns
电流 - 峰: 1.9A
配置数: 1
输出数: 2
高端电压 - 最大(自引导启动): 600V
电源电压: 10 V ~ 20 V
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 14-SOIC(0.154",3.90mm 宽)
供应商设备封装: 14-SOIC(窄型)
包装: 管件
产品目录页面: 1382 (CN2011-ZH PDF)
IRS2184/IRS21844(S)PbF
Tolerant to Negative V S Transients
A common problem in today’s high-power switching converters is the transient response of the switch
node’s voltage as the power switches transition on and off quickly while carrying a large current. A typical
half bridge circuit is shown in Figure 6; here we define the power switches and diodes of the inverter.
If the high-side switch (e.g., Q1 in Figures 7 and 8) switches off, while the phase current is flowing to a
load, a current commutation occurs from high-side switch (Q1) to the diode (D2) in parallel with the low-
side switch of the same inverter leg. At the same instance, the voltage node V S1 , swings from the positive
DC bus voltage to the negative DC bus voltage.
DC+ BUS
Q1
D1
Input
Voltage
Q2
DC- BUS
V S
D2
To
Load
DC+ BUS
Figure 6: Half Bridge Circuit
DC+ BUS
Q1
ON
V S 1
I U
Q1
OFF
V S1
D1
I U
Q2
D2
Q2
D2
OFF
DC- BUS
Figure 7: Q1 conducting
OFF
DC- BUS
Figure 8: D2 conducting
Also when the phase current flows from the load back to the inverter (see Figures 9 and 10), and Q4
switches on, the current commutation occurs from D3 to Q4. At the same instance, the voltage node, V S2 ,
swings from the positive DC bus voltage to the negative DC bus voltage.
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