NCP1237AD65R2G 37A65 SOP7

NCP1237
Fixed Frequency Current
Mode Controller for Flyback

Converters
The NCP1237 is a new generation of the NCP12xx fixed−frequency

current−mode controllers featuring Dynamic Self−Supply (DSS),
pin−to−pin compatible with the previous generation.
The DSS function greatly simplifies the design of the auxiliary supply
and the VCC capacitor by activating the internal startup current source to
supply the controller during transients.
Due to its proprietary Soft−Skip™ mode combined with frequency
foldback, the controller exhibits excellent efficiency in light load
condition while still achieving very low standby power consumption.
This Soft−Skip feature also dramatically reduces the risk of acoustic
noise, which enables the use of inexpensive transformers and
capacitors in the clamping network.