AN-060E Rev.1.0

Jun-2010

8

FA7711V

Fuji Electric Systems Co., Ltd.

http://www.fujielectric.co.jp/fdt/scd/

(5)Pulse width modulation section (FB1，FB2，FB3 pin)

Item

Symbol

Condition

MIN.

TYP.

MAX.

Unit

1.5

V

Threshold voltage (FB3)

(Driving Nch-MOSFET)

2.1

V

1.5

V

Threshold voltage (FB1/3)

(Driving Pch-MOSFET)

2.1

V

2.1

V

Threshold voltage (FB2)

(Driving Nch-MOSFET)

1.5

V

2.1

V

Threshold voltage (FB2)

(Driving Pch-MOSFET)

1.5

V

(6)Under voltage lockout section (VCC pin)

Item

Symbol

Condition

MIN.

TYP.

MAX.

Unit

ON threshold voltage of VCC

2.6

3.3

4.0

V

Hysteresis voltage

0.1

V

(7)Timer latch protection section (CP pin)

Item

Symbol

Condition

MIN.

TYP.

MAX.

Unit

Threshold voltage of FB1

*7-1

2.8

3.0

3.2

V

Threshold voltage of FB2

*7-2

0.4

0.6

0.8

V

Threshold voltage of FB3

*7-3

2.8

3.0

3.2

V

Charge current of CP

- 3.5

- 2.5

- 1.5

μA

Threshold voltage of CP

2.8

3.0

3.2

V

*7-1:The current source of the CP pin operates when the voltage of FB1 exceeds the threshold voltage as shown in the table

*7-2:The current source of the CP pin operates when the voltage of FB2 fall below the threshold voltage as shown in the table

*7-3:The current source of the CP pin operates when the voltage of FB3 exceeds the threshold voltage as shown in the table