IRMD2214SS International Rectifier, IRMD2214SS Datasheet - Page 11

• Manufacturer Part Number: IRMD2214SS
• Description: KIT DESIGN EVAL BOARD IR2214SS
• Manufacturer: International Rectifier
• Series: HVICr

Specifications of IRMD2214SS

• Main Purpose: Power Management, Half H-Bridge Driver (External FET)
• Utilized Ic / Part: IR2214SS
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -
• Other names: *IRMD2214SS

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
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.
Clamping Diode for Vs below ground
This solution preserves the device when the V
maximum ratings. The V
www.irf.com
DSH
15V
, C
DSH
S
and R
voltage is clamped to the maximum value allowed by a zener diode.
C
R
C
R
DSH
DSH
DSL
DSL
C
DSL
VCC
, C
Figure 8: Desat external filter
DSL
VCC
VSS
).
U
C7
R16
C4
R8
page
11/22
DSH
DSL
S
V
COM
B
Vcc
pin goes below ground out of the device absolute
V
V
C13
R28
C10
R21
S
R
C
DSH
DSH
R
C
DSL
DSL
W
C19
R40
C16
R33
desat diode
desat diode
High side
Low side
VGH
VGL
VEH
phase
VEL
Datasheet rev 2.1
DC+
IRMD22141SS
Sep 9
th
, 2004