NCP1237 ONSEMI [ON Semiconductor], NCP1237 Datasheet - Page 32

• Manufacturer Part Number: NCP1237
• Description: Fixed Frequency Current Mode Controller for Flyback Converters
• Manufacturer: ONSEMI [ON Semiconductor]

Controller Operation (Autorecovery Version: B Option)
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
Table 1. ORDERING INFORMATION
NCP1237AD65R2G
NCP1237BD65R2G
S Brown-out
S VCC reset
Latch
Part No.
S Brown-out
S HV OVP
S TSD
S t
autorec
Figure 30. Controller Operation State Diagram (Autorecovery Overload Protection)
S High Latch
S Low Latch
counting
Stopped
S High Latch
S Low Latch
Overload Protection
Autorecovery
With Fault =
Latched
Soft−skip
S Brown-out
S HV OVP
S TSD
V
S TSD
S Brown-out
S HV OVP
http://onsemi.com
CC
> V
Switching Frequency
S Soft-skip ends
S V
S t
S V
S V
CC(on)
FB
32
fault
CS
CC
65 kHz
65 kHz
> V
Skip
Skip out
or t
> V
< V
FB(fold)
tran
CS(stop)
CC(off)
expires
Skip in
S High Latch
S Low Latch
S Brown-out
S HV OVP
S TSD
High Latch
Running
(Pb−Free)
(Pb−Free)
Package
SOIC−7
SOIC−7
Soft−start
S Fault
S Brown-out
S HV OVP
S TSD
Soft-start ends
2500 / Tape & Reel
2500 / Tape & Reel
Shipping
†