NCP81178: Secondary Synchronous Rectifier Driver for Forward Converters
The NCP81178 is a secondary-side synchronous rectifier driver designed for isolated power converters, especially actively clamped forward or flyback, and asymmetric half bridge converters. The NCP81178 drives two N-channel MOSFETs on the secondary side in a complementary manner. It accepts a PWM signal that can be derived from the secondary winding or an auxiliary winding on the main power transformer. It can also take a PWM from the primary side controller through a pulse transformer or other isolator.
Features- N-channel synchronous rectifier MOSFET driver
- Primary shutdown detection
- Internally generated PWM threshold voltage with external programmability
- 4.5A/3.8A sink and 3A source capability
- 3mm by 3mm DFN package
| Benefits- Drives N-channel MOSFETs to improve efficiency for high power isolated solution
- Protection against overvoltage
- Design flexibility
- Strong drivers allows fast turn on/off characteristics
- Small size reduces board space
|
Applications- Isolated DC/DC power
- servers silver box supplies
- 48V server, telecom and datacom
| End Products- servers
- datacom
- isolated bricks
|
Data Sheets (1)
Package Drawings (1)
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| NCP81178MNTXG | Active | Pb-free
Halide free | DFN-10 | 506CL | 1 | Tape and Reel | 3000 | Contact BDTIC |
Specifications
| Product | VCC Max (V) | Vref Typ (V) | ICC Max (A) | TA Min (°C) | TA Max (°C) |
|---|
| NCP81178MNTXG | 14 | 1.25 | | -40 | 125 |
