bd8621efv ROHM Co. Ltd., bd8621efv Datasheet - Page 11

• Manufacturer Part Number: bd8621efv
• Description: Built-in 1ch Fet Synchronous Rectification Type Dc/dc Converters
• Manufacturer: ROHM Co. Ltd.

Protecting BUS function with terminal PDET
reduced at "L" level with the output voltage fixed “L” level at the same time. Moreover, it is possible to make the output fix
in a low level by compulsorily reducing the terminal PDET at "L" level from the outside.
IC error transmits all other ICs by PDET line in the condition that PDET terminals are connected each other.
Error detection (off latch) release method
The terminal PDET (3 pins) monitors whether IC is normal or not. When IC becomes abnormal, the PDET output is
When two or more BD8623EFV is used in the application, this function prevents the IC from destroying, because one
BD8623EFV enters the state of an off latch when the protection function operates.
To release the off latch state, EN terminal voltage should be changed to low level once time.
※Please give the terminal PDET as OPEN when you do not use protecting BUS function.
Fig.6 Protecting BUS communication
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