CS1500

14

DS849A7

Jul ?$shortyear>

CONFIDENTIAL

needed to meet the hold-up time required is defined by the

following equation:

becomes:

Choose a 100

μF capacitor.

4.1.7

Overvoltage Protection

of the nominal value:

While in overvoltage protection mode, gate drive output is

nominal value.

C

out hold

()

2P

O

×

t

×

hold

V

link

ΔV

out rip

()

2

-------------------------

–





2

V

link min

()

()

2

–

------------------------------------------------------------------------------------------

=

[Eq.18]

C

out hold

()

290

×

0.010

×

400

10

2

------

–





2

300

()

2

–

------------------------------------------------------

27

μF

==

V

ovp

V

link

1.05

×

=

V

ovp

400

1.05

×

=

V

ovp

420V

=

[Eq.19]