FAN9611MX【PDF 17/35 页】IC PFC CTLR DUAL BCM 16-SOIC

?2008 Fairchild Semiconductor Corporation

www.fairchildsemi.com

FAN9611 " Rev. 1.1.7

17

12. Bias Supply (V

DD

)

This is the main bias source for the FAN9611. The

operating voltage range is between 8 V and 18 V. The

V

DD

voltage is monitored by the under-voltage lockout

(UVLO) circuit. At power-up, the V

DD

voltage must

exceed 10.0 V (?.5 V to enable operation. The

FAN9611 stops operating when the V

DD

voltage falls

below 7.5 V (?.5 V). See PGND pin description for

important bypass information.

13. Current-Sense Protection (CS1, CS2)

The FAN9611 uses independent over-current protection

for each of the power MOSFETs. The current-sense

thresholds at the CS1 and CS2 pins are approximately

0.2 V. The current measurements are strictly for

protection purposes and are not part of the control

algorithm. The pins can be directly connected to the

non-grounded end of the current-sense resistors

because the usual R-C filters of the leading-edge

current spike are integrated in the IC.

Figure 26. Current-Sense Protection Circuits

The time constant of the internal filter is approximately:

ns

pF

k

130

5

27

=

?/DIV>

=

or

MHz

pF

k

P

2

.

1

5

27

2

1

=

?/DIV>

=

?/DIV>

(4)

发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

*型号	*数量	厂商	批号	封装

添加更多采购

我的联系方式

*

采购需求

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

我的联系方式