ON NCP1200A datasheet(1)
Update: 29 September, 2023
The NCP1200A is a PWM current-mode controller suitable for universal off-line supplies featuring low standby power. It enhances the previous NCP1200 series by offering a reduced optocoupler current together with an increased drive capability. With its novel concept, the circuit allows the implementation of complete off-line AC-DC adapters, battery chargers, or SMPS where standby power is a key parameter. The controller operates at a fixed frequency of 40 kHz, 60 kHz, or 100 kHz and draws power from the high-voltage rail, eliminating the need for an auxiliary winding. This simplifies the design task in battery charger applications. The current-mode control provides excellent audio susceptibility and inherent pulse-by-pulse control. When the current setpoint falls below a given value, the IC automatically enters the skip cycle mode, providing excellent efficiency at light loads. This occurs at a user-adjustable low peak current, ensuring no acoustic noise. The NCP1200A features efficient protective circuitry that disables the output pulses in the presence of an overcurrent condition, entering a safe burst mode to attempt a restart. The device auto-recovers once the fault has been resolved.
Brand: ON
File format: PDF
Size: 186 KB
MD5 Checksum: 6EDA171500D15F7084C318ADCD31ADF0
Publication date: 10 July, 2012
Downloads: -
PDF Link: ON NCP1200A datasheet(1) PDF