ncp1250 ON Semiconductor, ncp1250 Datasheet - Page 2

• Manufacturer Part Number: ncp1250
• Description: Ncp1250 Current-mode Pwm Controller For Off-line Power Supplies
• Manufacturer: ON Semiconductor

†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
ORDERING INFORMATION
Specifications Brochure, BRD8011/D.
NCP1250ASN65T1G
NCP1250BSN65T1G
NCP1250ASN100T1G
NCP1250BSN100T1G
OPTIONS
Pin N5
Vbulk
1
2
3
4
5
6
NCP1250ASN100T1G
NCP1250BSN100T1G
NCP1250ASN65T1G
NCP1250BSN65T1G
Device
Controller
Pin Name
OPP/OVP
GND
DRV
V
CS
FB
CC
OVP
Adjust the Over Power Protection
Package Marking
1
2
3
Supplies the controller
Current sense + ramp
OPP
Latches off the part
NCP1250
25A
25C
25D
252
compensation
Feedback pin
Driver output
Function
−
Frequency
Figure 1. Typical Application Example
100 kHz
100 kHz
65 kHz
65 kHz
6
5
4
OCP Protection
Autorecovery
Autorecovery
http://onsemi.com
Latch
Latch
The controller ground.
Hooking an optocoupler collector to this pin will allow regulation.
A resistive divider from the auxiliary winding to this pin sets the OPP
compensation level. When brought above 3 V, the part is fully latched
off.
This pin monitors the primary peak current but also offers a means to
introduce ramp compensation.
This pin is connected to an external auxiliary voltage and supplies the
controller.
The driver’s output to an external MOSFET gate.
ramp
comp.
2
.
Switching Frequency
OCP Latched
Yes
Yes
No
No
100 kHz
100 kHz
65 kHz
65 kHz
.
.
Pin Description
(Pb−Free)
Package
TSOP−6
OCP Auto−Recovery
Yes
Yes
No
No
Tape & Reel
Shipping
3000 /
Vo u t
†