BD3021HFP-M 데이터 시트보기 (PDF) - ROHM Semiconductor
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BD3021HFP-M Datasheet PDF : 15 Pages
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BD3021HFP-M
●WDT timer ON/OFF switch INH (Resistance value is typical value)
BD3021HFP-M has a switch INH to turn the WDT ON/OFF
INH
10kΩ
LOW
WDT
ON
HIGH
WDT
500kΩ OFF
ON/OFF
Circuit
Technical Note
VREF_R
(TYP≒1.25V)
CT
External Capacitor
IC Internal Block Diagram
By using INH ON, CT potential can be pulled up to internal voltage VREF_R (invalid with power ON reset))
＜Timing Chart＞
Vcc
13.5V
0V
VOUT
5V
0V
5V
INH
0V
1.25V
1.15V
0.15V
0V
CT
5V
CLK
0V
OUT voltage
RESET
0V
WDT ON
CT pull up Voltgge
Upper switching threshold voltage
lower switching threshold voltage
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8/14
2010.11 - Rev.A
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