数字电源特辑
MD67xx系列 应用实例
The MD67xx series will offer remarkable effects in a variety of power supply applications.This section introduces our 3 applications as a specific example.
- 2-stage Off-line Converter (Bridgeless PFC + Self-startup LLC)
- 2-stage Off-line Converter (Bridgeless PFC + Current Mode LLC)
- Bridgeless Totem-pole PFC
2-stage Off-line Converter (Bridgeless PFC + Self-startup LLC)
This demo board using the MD6751 is a compact, high-efficiency, and self-starting off-line converter.Demo Board Features and Specifications
- Bridgeless PFC+LLC with full-digital control
- Built-in startup circuit that requires no external power supply circuit
- Noise reduction by frequency modulation CCM-PFC
- Optimal PFC control that allows higher efficiency and downsized heat-dissipating components
- Period of prototyping a power supply shortened by 30% with the development tool GUI
| Parameter | Description |
|---|---|
| Input Voltage | 90 VAC to 264 VAC |
| PFC Output Power | 550 W |
| LLC Output Power | 100 W |
| LLC Output Voltage/Current | 12 V / 0 A to 7.6 A |
| Protection Function | OVP, OCP, OLP |
2-stage Off-line Converter (Bridgeless PFC + Current Mode LLC)
This demo board using the MD6751 is an off-line converter which is compact, high-efficiency, and excellent in responsiveness to input/output voltage variations.
Demo Board Features and Specifications
- Bridgeless PFC + current mode LLC with coordinated control
- Optimal PFC control that allows higher efficiency and downsized heat-dissipating components
- Number of parts reduced by enhanced LLC responsiveness
- Power supply board downsized by 10% with simplified circuit configurations
- Period of prototyping a power supply shortened by 30% with the development tool GUI
| Parameter | Description |
|---|---|
| Input Voltage | 90 VAC to 264 VAC |
| PFC Output Power | 550 W |
| LLC Output Power | 100 W |
| LLC Output Voltage/Current | 12 V / 0 A to 7.6 A |
| Protection Function | OVP, OCP, OLP |
Bridgeless Totem-pole PFC
This demo board using the MD6753 is a PFC suitable for high power supplies whose efficiency requirements are stricter.
Demo Board Features and Specifications
- Compact and high-efficiency totem-pole PFC with optimal control
- Interleaved operation for smaller size and higher efficiency
- Quasi-resonant operation for higher efficiency and lower noise
- Intermittent operation for higher performance in light-load ranges
- Number of parts used for phase compensation reduced by digital control
| Parameter | Description |
|---|---|
| Input Voltage | 90 VAC to 264 VAC |
| PFC Output Power | 1000 W |
| PFC Output Voltage/Current | 400 V / 0 A to 2.5 A |
| Protection Function | OVP, OCP, OLP |
MD67xx 产品系列・咨询
MD67xx 产品系列
击此处
联系我们击此处
