BD8624EFV ROHM [Rohm], BD8624EFV Datasheet - Page 10

• Manufacturer Part Number: BD8624EFV
• Description: Built-in 1ch FET Synchronous Rectification Type DC/DC converters
• Manufacturer: ROHM [Rohm]

PROTECT BUS Input/output function
The terminal PIO is PROTECT BUS Input/output terminal. The terminal PIO is Hi-Z when DC/DC usually operates. When the
terminal PIO becomes LOW by connecting PROTECT BUS, DC/DC is turned off. Afterwards, when the terminal PIO becomes
HIGH, it reactivates.
DC/DC is Off latch when DC/DC error detects it and the terminal PDET becomes LOW.
PROTECT BUS Timing chart
If two or more BD8628EFV/BD8633EFV/BD8624FV/BD8630FV is connected in PROTECT BUS, and it uses at the same time,
when one IC error detects, all remaining IC becomes PIO = Low at the same time, and the output is turned off.
Error detection
PIO
PIO
Undetection
Undetection
Detection
DC/DC
IC_A
IC_B
When two or more BD8628EFV/BD8633EFV/BD8624FV/BD8630FV is used at the same time,
If one IC error detects, all IC becomes DC/DC OFF at the same time.
Protecting BUS part timing chart
IC_A
PDET
IC_B
Vo
IC_A
PIO
IC_B
PIO
Table2 PIO terminal, PDET terminal output function
IC_B
PDET
PIO terminal
IC_A detects error.
LOW
LOW
Hi-Z
High
High
High
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DC/DC OFF
OFF LATCH
High
PDET terminal
LOW
Hi-Z
Hi-Z
LOW
LOW
LOW
0V
Off latch
DC/DC
OFF
ON