The CS51221 fixed frequency feed forward voltage mode PWM controller contains all of the features necessary for basic voltage mode operation. This PWM controller has been opti- mized for high frequency prima- ry side control operation. In addition, this device includes such features as: Soft Start, accu- rate duty cycle limit control, less than 50µA startup current, over and under voltage protection, and bidirectional synchroniza- tion. The CS51221 is available in 16 lead PDIP and SO narrow surface mount pa
The CS51221 is a fixed frequency feed forward voltage mode PWM controller optimized for high frequency primary side control operation. It includes features such as soft start, accurate duty cycle limit control, over and under voltage protection, and bidirectional synchronization. The device is available in 16 lead PDIP and SO narrow surface mount packages.
| Frequency Capability | 1MHz |
|---|---|
| Startup Current | less than 50uA |
| Reference Voltage | 3.3V 3% |
| Gate Drive Output | 1A Sink/Source |
| Shutdown Propagation Delay | 75ns |
| GATE Rise and Fall Time | 25ns (1nF load) |
| Thermal Shutdown | 125 to 180°C |
The device supports a maximum frequency of 1 MHz.
The CS51221 is available in 16 lead PDIP and SO narrow surface mount packages.
Yes, the device includes over and under voltage protection features.