Product Overview
DPA424GN-TL from Power Integrations is a highly integrated DC-DC converter IC for PoE and telecom. 16-75VDC input. 220V MOSFET, PWM control, and protection on one CMOS chip. 300/400kHz selectable. Forward or flyback topology. G package = surface mount DIP.
Working Principle
Integrates 220V power MOSFET, oscillator, PWM controller, 5.8V regulator, and fault protection. C/L pin sets current limit and line UV/OV. Selectable 300/400kHz. Auto-restart on fault. Cycle-skipping at light load for zero-load regulation.
Pin Description
| Pin | Name | Function |
|---|---|---|
| 1 | C | Control |
| 2 | L | Line sense |
| 3 | X | External current limit |
| 4 | S | Source (return) |
| 5-7 | F | Frequency select |
| 8 | D | Drain (high voltage) |
Applications
- Power over Ethernet (PoE)
- Telecom 48V distributed power
- Industrial 24V bus converters
Alternative Models
| Manufacturer | Part Number | Notes |
|---|---|---|
| PI | DPA423GN-TL | Lower power version |
| PI | DPA425GN-TL | Higher power version |