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| 型号： | IRMD2214SS |
| 厂商： | International Rectifier |
| 文件页数： | 11/22页 |
| 文件大小： | 0K |
| 描述： | KIT DESIGN EVAL BOARD IR2214SS |
| 标准包装： | 1 |
| 系列： | HVIC |
| 主要目的： | 电源管理，半 H 桥驱动器（外部 FET） |
| 已用 IC / 零件： | IR2214SS |
| 已供物品： | 板，文档 |
| 相关产品： | IR22141SSTRPBF-ND - IC DVR HALF BRIDGE IC 24SSOP IR2214SSTRPBF-ND - IC DVR HALF BRIDGE IC 24SSOP IR2214SSPBF-ND - IC DRIVER HALF BRIDGE SGL 24SSOP IR22141SSPBF-ND - IC DRIVER HALF BRIDGE SGL 24SSOP IR2214SS-ND - IC DRIVER HALF BRIDGE SGL 24SSOP IR22141SS-ND - IC DRIVER HALF BRIDGE SGL 24SSOP |
| 其它名称： | *IRMD2214SS |
Datasheet rev 2.1
IRMD22141SS
OTHER EXTRA COMPONENTS
These components are provided to make IRMD22141SS board as customizable as possible. In many
cases the extra components are not required.
Desat circuit
The IR22141S is able to detect the IGBT desaturation. To reject the noise on the desat pins the
IR22141SS have an internal filter of 1 sec. If this is not enough an RC filter has been placed on board
(see figure 8, R DSH , C DSH and R DSL , C DSL ).
High side
desat diode
DC+
VCC
V B
R DSH
DSH
VGH
15V
C VCC
V S
Vcc
C DSH
Low side
desat diode
VEH
phase
R DSL
VSS
DSL
C DSL
VGL
COM
VEL
Figure 8: Desat external filter
The external resistor is in parallel with the internal bias circuit of the desat diode. If added, the external
resistor may cause an higher diode bias current that must be taken into account in bootstrap capacitor
sizing.
External RC filter delays desaturation detection, that causes a delay in turning the IGBT off. Consider
this delay when sizing the soft-shut-down resistors.
The following table shows the names of these components on board.
U
V
W
C DSH
R DSH
C DSL
R DSL
C7
R16
C4
R8
C13
R28
C10
R21
C19
R40
C16
R33
Clamping Diode for Vs below ground
This solution preserves the device when the V S pin goes below ground out of the device absolute
maximum ratings. The V S voltage is clamped to the maximum value allowed by a zener diode.
Sep 9 , 2004
www.irf.com
page 11/22
th
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