ORing MOSFET Controllers with Fastest
Fault Isolation for Redundant Power Supplies
MAX8535 Typical Operating Characteristics (continued)
(VCC = 12V, RTIMER = 25kΩ, UVP = 2V, OVP = 1V, CGATE = 0.01µF, BUS = 100µF, TA = +25°C, unless otherwise specified.)
TIMER-ENABLED STARTUP AND SHUTDOWN
WAVEFORMS (VCC = 12V, VBUS = 12V)
MAX8535/MAX8536 toc07
VTIMER
2V/div
4ms/div
IMOSFET
50mA/div
VGATE
20V/div
VCS
10V/div
TIMER-ENABLED STARTUP AND SHUTDOWN
WAVEFORMS (VCC = 12V, VBUS = 0V)
MAX8535/MAX8536 toc08
VTIMER
1V/div
4ms/div
IMOSFET
10A/div
VGATE
20V/div
VCS
10V/div
REVERSE-CURRENT FAULT WAVEFORM
(R1 = 10Ω)
MAX8535/MAX8536 toc09
VCS
1V/div
12V
IMOSFET
5A/div
400ns/div
VGATE
20V/div
VFAULT
10V/div
UVP FAULT WAVEFORM
(R1 = 100Ω)
MAX8535/MAX8536 toc10
1.25V
VUVP
1V/div
1µs/div
VFAULT
10V/div
VGATE
20V/div
VCS
10V/div
SELECTIVE OVP SHUTDOWN WAVEFORM
(R1 = 10Ω)
MAX8535/MAX8536 toc11
VCS
1V/div
12V
1µs/div
VGATE1
(OVP UNIT)
20V/div
VGATE2
(GOOD UNIT)
20V/div
VFAULT
10V/div
_______________________________________________________________________________________ 9