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BYW29-200 from VISHAY

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BYW29-200

Manufacturer: VISHAY, PHILIPS, ON, 台产, 台半, GS, ST, TSC

FAST EFFICIENT PLASTIC RECTIFIER

Partnumber Manufacturer Quantity Availability
BYW29-200,BYW29200 VISHAY, PHILIPS, ON, 台产, 台半, GS, ST, TSC 247172 In Stock

Description and Introduction

FAST EFFICIENT PLASTIC RECTIFIER The BYW29-200 is a high-efficiency rectifier diode manufactured by STMicroelectronics (ST). Below are the key specifications from the datasheet:

### **General Specifications:**
- **Manufacturer:** STMicroelectronics (ST)  
- **Part Number:** BYW29-200  
- **Type:** Ultrafast High-Efficiency Rectifier Diode  
- **Package:** TO-220AC (isolated)  

### **Electrical Characteristics:**
- **Maximum Repetitive Reverse Voltage (V_RRM):** 200 V  
- **Average Forward Current (I_F(AV)):** 20 A  
- **Peak Forward Surge Current (I_FSM):** 200 A (8.3 ms single half-sine wave)  
- **Forward Voltage Drop (V_F):** 0.95 V (Typical at I_F = 10 A)  
- **Reverse Recovery Time (t_rr):** 35 ns (Typical at I_F = 1 A, di/dt = 100 A/µs)  
- **Reverse Recovery Charge (Q_rr):** 60 nC (Typical at I_F = 1 A, di/dt = 100 A/µs)  

### **Thermal Characteristics:**
- **Junction-to-Case Thermal Resistance (R_thJC):** 1.5 °C/W  
- **Operating Junction Temperature (T_J):** -40 °C to +150 °C  

### **Applications:**
- High-frequency rectification  
- Switch-mode power supplies (SMPS)  
- Freewheeling diodes  
- DC-DC converters  

For detailed specifications, refer to the official ST datasheet.

Application Scenarios & Design Considerations

FAST EFFICIENT PLASTIC RECTIFIER# Technical Documentation: BYW29200 Schottky Diode

## 1. Application Scenarios

### 1.1 Typical Use Cases
The BYW29200 is a high-current, high-voltage dual center-tapped Schottky diode primarily employed in power conversion applications. Its most common implementations include:

 Power Supply Rectification 
- Switch-mode power supply (SMPS) output rectification in forward converter topologies
- Secondary-side rectification in AC-DC converters (typically 100-200V applications)
- Server/telecom power supplies requiring high efficiency at 100-150kHz switching frequencies

 Freewheeling Applications 
- Freewheeling diode in buck converters and synchronous rectification circuits
- Clamping diode in flyback converter designs
- Protection against voltage spikes in inductive load switching

 Specialized Power Conversion 
- Welding equipment power supplies
- Uninterruptible power supply (UPS) systems
- High-frequency DC-DC converter modules

### 1.2 Industry Applications

 Telecommunications Infrastructure 
- Base station power systems requiring high reliability and efficiency
- Rectifier modules in -48V DC power plants
- Power over Ethernet (PoE) midspan/injector equipment

 Industrial Automation 
- Motor drive circuits requiring fast recovery characteristics
- Programmable logic controller (PLC) power modules
- Industrial welding and cutting equipment power supplies

 Computing & Data Centers 
- Server power supply units (PSUs) with 80 Plus certification requirements
- Blade server DC-DC conversion stages
- High-performance computing power delivery networks

 Renewable Energy Systems 
- Solar microinverter output stages
- Wind turbine auxiliary power supplies
- Battery charge controllers for energy storage systems

### 1.3 Practical Advantages and Limitations

 Advantages: 
-  Low Forward Voltage Drop:  Typically 0.85V at 100A, reducing conduction losses significantly compared to standard PN junction diodes
-  Fast Switching Characteristics:  Minimal reverse recovery time (<35ns) reduces switching losses in high-frequency applications
-  High Current Capability:  200A average forward current rating supports high-power applications
-  Thermal Performance:  Low thermal resistance (0.35°C/W junction-to-case) enables efficient heat dissipation
-  Center-Tapped Configuration:  Simplifies full-wave rectifier designs with reduced component count

 Limitations: 
-  Voltage Rating Constraint:  200V maximum repetitive reverse voltage limits use in higher voltage applications
-  Temperature Sensitivity:  Forward voltage exhibits negative temperature coefficient requiring careful thermal management
-  Reverse Leakage Current:  Higher than PN diodes, particularly at elevated temperatures (>125°C)
-  Cost Considerations:  Premium pricing compared to standard recovery diodes in cost-sensitive applications
-  Avalanche Capability:  Limited avalanche energy rating requires external protection in inductive circuits

## 2. Design Considerations

### 2.1 Common Design Pitfalls and Solutions

 Thermal Management Issues 
-  Pitfall:  Inadequate heatsinking leading to thermal runaway
-  Solution:  Implement proper thermal interface material and calculate heatsink requirements based on worst-case power dissipation
-  Implementation:  Use thermal simulation tools and derate current by 0.5% per °C above 75°C case temperature

 Voltage Overshoot Problems 
-  Pitfall:  Parasitic inductance causing voltage spikes exceeding VRRM
-  Solution:  Implement snubber circuits and minimize loop inductance in layout
-  Implementation:  RC snubber with values calculated based on di/dt and parasitic inductance measurements

 Current Sharing Challenges 
-  Pitfall:  Unequal current distribution in parallel configurations
-  Solution:  Implement current-sharing resistors or active balancing
-  Implementation:  10-20mΩ series resistors with Kelvin connections for parallel operation

 Switching Loss Optimization 
-  Pitfall:  Excessive

Alternative Part Number

  • STTH802D --: Ultrafast 8A 200V recovery diode in TO-220, very close electrical match to BYW29-200 with similar forward voltage and recovery time.
  • MUR820 --: 8A 200V ultrafast rectifier in TO-220, widely available and commonly used as a drop-in replacement for BYW29-200.
  • VS-8ETH06-M3 --: Same manufacturer family, 8A 600V ultrafast diode that exceeds the 200V rating and fits the same TO-220 footprint, offering a safe higher-voltage alternative.
  • STTH2002D --: 200 V, 20 A ultrafast recovery diode in TO-220AC, directly comparable forward current and reverse voltage with similar fast switching behavior.
  • MUR2020 --: 200 V, 20 A ultrafast rectifier in TO-220 package, widely available and electrically similar to the BYW29-200.
  • VS-20ETF02 --: 200 V, 20 A ultrafast diode in TO-220AC, suitable drop-in replacement with comparable recovery time and current rating.
  • DSEI20-02A --: 200 V, 20 A fast recovery epitaxial diode in TO-220AC, suitable drop-in replacement for switching and rectification applications.
  • BYV29-200 --: 8A 200V ultrafast diode from a different series with comparable ratings and TO-220 package, suitable as a functional replacement.
  • MUR220 --: 200V ultrafast rectifier rated 2A with low forward voltage and fast recovery, widely available and electrically comparable.
  • BYV28-200 --: 200V ultrafast avalanche rectifier with similar current rating and recovery characteristics, from a different series naming.

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