1.0A SURFACE MOUNT GLASS PASSIVATED RECTIFIER # Technical Documentation: DFLR16007 Schottky Barrier Rectifier
## 1. Application Scenarios
### Typical Use Cases
The DFLR16007 is a 60V, 16A dual common-cathode Schottky barrier rectifier designed for high-efficiency power conversion applications. Its primary use cases include:
Power Supply Output Rectification
- Switch-mode power supply (SMPS) output stages in AC/DC and DC/DC converters
- Freewheeling diodes in buck, boost, and flyback converter topologies
- Synchronous rectification replacement in medium-power applications
Reverse Polarity Protection
- Battery-powered systems requiring low forward voltage drop
- Automotive accessory power ports
- Industrial equipment power inputs
High-Frequency Rectification
- Switching frequencies up to 200 kHz (typical)
- High-frequency inverters and motor drives
- Solar micro-inverter output stages
### Industry Applications
Consumer Electronics
- Desktop and laptop computer power supplies (particularly ATX PSUs)
- Gaming console power adapters
- Large LCD/LED television power boards
- High-power USB-PD chargers (45W+)
Automotive Systems
- DC/DC converters in electric and hybrid vehicles
- LED lighting drivers
- Infotainment system power supplies
- 12V/24V automotive accessory circuits
Industrial Equipment
- Industrial motor drives and controls
- Uninterruptible power supplies (UPS)
- Welding equipment power stages
- Telecom rectifier modules
Renewable Energy
- Solar charge controllers
- Wind turbine power conditioning
- Maximum power point tracking (MPPT) converters
### Practical Advantages and Limitations
Advantages:
- Low Forward Voltage Drop: Typically 0.55V at 8A, 25°C, reducing conduction losses by 30-50% compared to standard PN junction diodes
- Fast Switching Characteristics: Reverse recovery time <10ns, minimizing switching losses at high frequencies
- High Current Capability: 16A average forward current rating with proper heatsinking
- Dual Common-Cathode Configuration: Saves board space in center-tapped transformer applications
- High Temperature Operation: Rated for junction temperatures up to 150°C
Limitations:
- Higher Reverse Leakage Current: Typically 0.5-2mA at rated voltage, increasing with temperature
- Voltage Rating Constraint: 60V maximum limits use in higher voltage applications
- Thermal Management Required: High power dissipation necessitates proper heatsinking
- Sensitivity to Voltage Transients: Requires protection against voltage spikes exceeding VRRM
## 2. Design Considerations
### Common Design Pitfalls and Solutions
Thermal Management Issues
- Pitfall: Inadequate heatsinking leading to thermal runaway and premature failure
- Solution: Calculate maximum power dissipation (P_D = V_F × I_F) and ensure junction temperature remains below 125°C for reliable operation. Use thermal interface material and sufficient copper area on PCB
Voltage Spike Protection
- Pitfall: Voltage transients from inductive loads exceeding 60V VRRM
- Solution: Implement snubber circuits (RC networks) across inductive loads and consider TVS diodes for additional protection
Current Sharing in Parallel Configurations
- Pitfall: Unequal current distribution when paralleling devices
- Solution: Include small series resistors (10-50mΩ) or use devices from same production lot. Avoid paralleling without current balancing measures
High Frequency Ringing
- Pitfall: Parasitic inductance causing voltage overshoot during switching transitions
- Solution: Minimize loop area in high-current paths, use low-ESR/ESL capacitors close to device, and consider gate resistor optimization in synchronous applications
