NCP1379 ON Semiconductor, NCP1379 Datasheet - Page 21

• Manufacturer Part Number: NCP1379
• Description: Quasi-Resonant Current-Mode Controller
• Manufacturer: ON Semiconductor

brown−out resistors.
controller must start switching (V
voltage for shutdown (V
equation to calculate R
V
I
We select:
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
BO
ORDERING INFORMATION
Specifications Brochure, BRD8011/D.
Figure 37. Operating Chronograms in Case of Overvoltage with NCP1379 Supplied by an Auxiliary Power Supply
BO
NCP1379DR2G
The following equations show how to calculate the
First of all, select the bulk voltage value at which the
+
R
= 10 mA
bol
= 0.8 V
10x10
+
0.8 ( 120 * 60 )
V
V
−6
BO
bulk(on)
I
BO
( 120 * 0.8 )
V
V
bulk(on)
bulk(on)
= 120 V,
Device
bou
* V
bulk(off)
* V
+ 40.3 kW
and R
bulk(off)
BO
V
bulk(off)
). Then use the following
bol
.
bulk(on)
= 60 V
) and the bulk
DESIGN EXAMPLE
(eq. 11)
http://onsemi.com
21
Package Type
(Pb free)
SOIC−8
R
+
bou
40.3x10
+
R
bol
R
3
R
0.8
bol
( 120 * 0.8 )
V
bou
bulk(on)
+
V
+
V
BO
BO
R
I
BO
bol
* V
V
V
+ 6 MW
bulk(on)
V
bulk(on)
BO
bulk(on)
V
2500 / Tape & Reel
BO
* V
* V
Shipping
www.DataSheet4U.com
* V
bulk(off)
BO
BO
†
(eq. 10)
(eq. 12)
(eq. 9)