The document introduces CS51021/22/23/24 series fixed frequency PWM current mode controller, which has low startup current (75µA), high frequency operation capability, overvoltage and undervoltage monitoring, programmable dual threshold overcurrent protection, current sense leading edge blanking, current slope compensation, accurate duty cycle control and an externally available 5V reference. The series controller has bidirectional synchronization function, CS51021 and CS51023 provide sleep mode, with maximum IC current consumption of 100µA. The series controller uses a 16-lead narrow body SO package.
The CS51021/22/23/24 Fixed Frequency PWM Current Mode Controller family provides all necessary features required for AC-DC or DC-DC primary side control. Several features are included eliminating the additional components needed to implement them externally, such as low start-up current and high frequency operation capability.
| Switching Frequency | 1MHz |
|---|---|
| Package Type | 16 Lead SO Narrow |
The fixed frequency operation capability is 1 MHz.