Technical Note

6/9

BDJ□□□1HFV Series

www.rohm.com

2011.07 - Rev.D

© 2011 ROHM Co., Ltd. All rights reserved.

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Function Diagram(ex. 80℃ detect Active“H”type BDJ0801HFV)

Temperature sensor internal IC sense temperature, Vtemp terminal output voltage convert temperature.

Vtemp value is 1.300[V] at Ta = 30[℃].

The value of Vtemp voltage reduce reversely proportional temperature at rate of –8.2mV/℃.

If the temperature over detect temperature,

internal comparator operate OS output “L” to “H”.(ex.active “H” Type)

In case of OS return to “L”,the temperature 10℃ lower than detect temperature.

0

2.0

1.0

Vos

Vtemp@30℃

( 1.300V )

Temperature

Sensitivity

( -8.20mV/℃ typ.)

Detect point Temperature

Hysteresis

( 10℃ typ.)

Temperature [℃]

1.5

2.5

3.0

0.5

110

90

70

50

10

130

-30

30

-10

-50