NCP1235 Overview
NCP1235 Product Preview Fixed Frequency Current Mode Controller for Flyback Converters The NCP1235 is a new fixed−frequency current−mode controller featuring Dynamic Self−Supply (DSS). This device is pin−to−pin patible with the previous NCP12xx families. 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...
NCP1235 Key Features
- Fixed-Frequency Current-Mode Operation with Built-In Ramp
- 65 kHz Oscillator Frequency
- Timer-Based Overload Protection then Device is Latched
- High-voltage Current Source with Brown-Out
- Internal Thermal Shutdown
- Frequency Modulation for Softened EMI Signature
- Adjustable Overpower pensation
- Latch-off Input for Severe Fault Conditions, Allowing
- VCC Operation up to 28 V, with Overvoltage Detection
- $500 mA Peak Source / Sink Current Drive Capability
NCP1235 Applications
- AC−DC Adapters for Notebooks, LCD, and Printers