BD9673EFJ-E2 ROHM Electronics, BD9673EFJ-E2 Datasheet - Page 6

• Manufacturer Part Number: BD9673EFJ-E2
• Description: Specifications: Type: Step-Down (Buck) ; Output Type: Adjustable ; PWM Type: Current Mode ; Synchronous Rectifier: Yes ; Number of Outputs: 1 ; Voltage - Output: 1 V ~ 29.4 V ; Current - Output: 1.5A ; Frequency - Switching: 300kHz ; Voltage - Input:
• Manufacturer: ROHM Electronics

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BD9673EFJ
© 2012 ROHM Co., Ltd. All rights reserved.
◇OCP operation
The device has the circuit of over current protection for protecting the FET from over current.
To detect OCP 2 times sequentially, the device will stop and after 13msec restart.
OCP_LATCH
VOUT
OCP
VC
Lx
output connect to GND
VC voltage rising by
OCP threshold
Fig.5 Timing chart at OCP operation
the OCP current 2 times sequencially
force the High side FET OFF
(pulse by pulse protection)
output connect to GND
VC voltage discharged
by detecting OCP current
set the OCP latch by detecting
by OCP latch
6/18
OCP latch reset after 13 msec
(300ｋHz 4000 counts)
Technical Note
2012.02 - Rev.C