Description

TOP233YN is an electronic component model that falls under the category of AC DC Converters and Offline Switchers. It is a cost-effective solution that combines the TOPSwitch topology with new integrated functions. This integration not only reduces system cost but also improves design flexibility, performance, and energy efficiency. The TOP233YN integrates high voltage power MOSFET, PWM control, fault protection, and other control circuitry onto a single CMOS chip, with the addition of two extra terminals.

Specifications and features

• Lower system cost
• High design flexibility
• Fully integrated soft-start for minimum stress/overshoot
• Externally settable accurate current limit
• Wider duty cycle for more power, smaller input capacitor
• Line under-voltage (UV) detection: no turn off glitches
• Line overvoltage (OV) shutdown extends line surge limit
• Line feed forward with maximum duty cycle (DCMAX) reduction rejects ripple and limits DCMAX at high line
• Single resistor sets OV/UV thresholds, DCMAX reduction
• Frequency jittering reduces EMI and EMI filtering costs
• Regulates to zero load without dummy loading
• 132 kHz frequency reduces transformer/power supply size
• Half frequency option for video applications
• Hysteretic thermal shutdown for automatic recovery
• Large thermal hysteresis prevents PC board overheating
• Standard packages with omitted pins for large creepage
• Active-on and active-off remote ON/OFF capability
• Synchronizable to a lower frequency

Application Scenarios

The TOP233YN can be used in a variety of applications including:

• AC DC converters
• Offline switchers
• Power supply systems
• Home appliances
• Industrial equipment
• LED lighting
• Audio and video equipment

Comparison

• Lower system cost due to elimination or reduction of external components
• Enhanced design flexibility and performance
• Improved energy efficiency
• Accurate current limit control
• Wider duty cycle for higher power and smaller input capacitor
• Line voltage detection without turn-off glitches
• Line overvoltage shutdown for extended line surge limit
• Frequency jittering for reduced EMI and filtering costs

No specific disadvantages have been identified for the TOP233YN model.