TOP255YN 57W AC/DC Converter IC

The TOP255YN is a cost effectively incorporates a 700V power MOSFET, high voltage switched current source, PWM control, oscillator, thermal shutdown circuit, fault protection and other control circuitry onto a monolithic device. PWM control, fault protection and other control circuitry onto a single CMOS chip. Many new functions are integrated to reduce system cost and improve design flexibility, performance and energy efficiency.

Depending on package type, either 1 or 3 additional pins over the TOP Switch standard DRAIN, SOURCE and CONTROL terminals allow the following functions: line sensing (OV/UV, line feed-forward/DCMAX reduction), accurate externally set current limit, remote ON/OFF, synchronization to an external lower frequency, and frequency selection (132 kHz/ 66 kHz).

Features:

1. Features eliminate or reduce cost of external components
2. Fully integrated soft-start for minimum stress/overshoot
3. Externally settable accurate current limit
4. Wider duty cycle for more power, smaller input capacitor
5. Line under-voltage (UV) detection: no turn off glitches
6. Line overvoltage (OV) shutdown extends line surge limit
7. Line feed-forward with maximum duty cycle (DCMAX) reduction rejects ripple and limits DCMAX at high line
8. Single resistor sets OV/UV thresholds, DCMAX reduction
9. Frequency jittering reduces EMI and EMI filtering costs
10. Regulates to zero load without dummy loading
11. 132 kHz frequency reduces transformer/power supply size
12. Half frequency option for video applications
13. Hysteretic thermal shutdown for automatic recovery
14. Large thermal hysteresis prevents PC board overheating
15. Standard packages with omitted pins for large creepage
16. Active-on and active-off remote ON/OF

Applications:

1. LCD monitors
2. Personal computers
3. Small servers
4. Laptop adapters
5. Set-top boxes
6. Digital TVs
7. Printers
8. DVD Players and Recorders
9. UPS
10. Video Games
11. Broadband Modems
12. Cellular phone adapters
13. Audio Amplifiers

Packing List:

1Pc * TOP255YN 57W AC/DC Converter IC