IR3080

PbF

Ω

=

∗

∗

=

∗

∗

∗

=

−

−

576

10

*

91

.

0

6

2

.

30

*

10

*

64

.

0

162

3

3

_

_

O

MIN

CS

MAX

L

FB

DRP

R

n

G

R

R

R

Set the temperature threshold at 115 ºC, which corresponds the IC die temperature of 116 ºC. Calculate the

HOTSET threshold voltage corresponding to the temperature thresholds.

V

T

V

J

HOTSET

79

.

1

241

.

1

116

10

*

73

.

4

241

.

1

*

10

*

73

.

4

3

3

=

+

∗

=

+

=

−

−

Ω

=

−

∗

=

−

∗

=

k

V

V

V

R

R

HOTSET

BIAS

HOTSET

HOTSETC

HOTSETC

57

.

3

79

.

1

8

.

6

79

.

1

10

*

10

3

1

2

N/A. The body braking during Dynamic VID is disabled.

IR3086A EXTERNAL COMPONENTS

)]

ln(

)

[ln(

*

*

*

PWMRMP

DAC

IN

DAC

IN

PWMRMP

SW

IN

O

PWMRMP

V

V

V

V

V

C

f

V

V

R

−

−

−

−

=

Ω

=

−

−

−

−

∗

−

∗

∗

k

2

.

18

)]

75

.

0

3

.

1

12

ln(

)

3

.

1

12

[ln(

12

10

*

100

3

10

*

800

12

28

.

1

=

Ω

=

=

=

−

−

−

+

+

k

C

R

L

R

CS

L

CS

22

.

4

10

*

47

)

10

*

5

.

0

/(

10

*

100

9

3

9

Ω

=

∗

=

∗

=

+

−

k

R

R

CS

CS

61

.

2

10

*

22

.

4

4

.

0

25

.

0

4

.

0

25

.

0

3

The over temperature setting resistor divider is combined with the phase delay resistor divider. Set the temperature

threshold at 115 ºC, which corresponds the IC die temperature of 116 ºC, and calculate the HOTSET threshold

voltage corresponding to the temperature thresholds.

V

T

V

J

HOTSET

79

.

1

241

.

1

116

10

*

73

.

4

241

.

1

10

*

73

.

4

3

3

=

+

∗

=

+

∗

=

−

−

slope.

Page 33