si8235 Silicon Laboratories, si8235 Datasheet - Page 17

• Manufacturer Part Number: si8235
• Description: 0.5 And 4.0 A Isodrivers
• Manufacturer: Silicon Laboratories

The device driving VIA and VIB should provide a minimum dead time of TDD to avoid activating overlap protection.
Input/output timing waveforms for the two-input drivers are shown in Figure 8, and dead time waveforms are shown
in Figure 9. If dead time programming is not used, it is strongly recommended that DT be connected to VDDI to
avoid capacitive noise coupling; however, DT may also be left unconnected.
Note: If DT is left floating, there can be no DC leakage path between ground and DT. Avoid adding parasitic or component
VOA
VOB
VIA
VIB
capacitance in parallel with RDT.
A
Figure 8. Input/Output Waveforms for High Side/Low Side Two-Input Drivers
Figure 9. Dead Time Waveforms for High Side/Low Side Two-Input Drivers
VOA
VOB
VIA
VIB
A. Typical Dead Time Operation
B
DT
C
50%
90%
10%
D
DT
E
90%
F
10%
G
H
Preliminary Rev. 0.11
`
I
VOB
Ref
G
A
B
C
D
E
H
F
I
VIA
VIB
VOA
VOB
B. Dead Time Operation During Overlap
DT
Normal operation: VIA high, VIB low.
Normal operation: VIB high, VIA low.
Contention: VIA = VIB = high.
Recovery from contention: VIA transitions low.
Normal operation: VIA = VIB = low.
Normal operation: VIA high, VIB low.
Contention: VIA = VIB = high.
Recovery from contention: VIB transitions low.
Normal operation: VIB transitions high.
OVERLAP
DT
Description
DT
OVERLAP
DT
Si823x
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