onsemi NCP1351
The NCP1351 is a current-mode controller targeting low power off-line flyback Switched Mode Power Supplies (SMPS) where cost is of utmost importance. When the frequency decreases, the peak current is gradually reduced down to approximately 30% of the maximum peak current to prevent transformer mechanical resonance. The risk of acoustic noise is thus greatly diminished while keeping good standby power performance.| Part No. | NCP1351 |
|---|---|
| Datasheet | NCP1351 Download |
| Manufacturer |  onsemi |
| Description | Variable Off Time PWM Controller |
| Buy | Stock & Price |
NCP1351 Variable Off Time PWM Controller Based on a fixed peak current technique (quasi-fixed TON), the controller decreases its switching frequency as the load becomes lighter. As a result, a power supply using the NCP1351 naturally offers excellent no-load power consumption, while optimizing the efficiency in other loading conditions. An externally adjustable timer permanently monitors the feedback activity and protects the supply in presence of a short-circuit or an overload. Once the timer elapses, NCP1351 stops switching and stays latched for version A, and tries to res
