BP2819
High-voltage synchronous buck converter with 100V input capability for industrial and automotive applications up to 2A
Product Overview
Description
The BP2819 is a high-voltage synchronous buck converter designed for industrial and automotive applications requiring wide input voltage ranges. It supports input voltages up to 100V, making it suitable for 48V and 24V industrial systems.
This converter features synchronous rectification for high efficiency and low power dissipation. The adjustable switching frequency (100kHz to 1MHz) allows optimization between component size and efficiency for specific applications.
Comprehensive protection features include over-current protection, over-voltage protection, thermal shutdown, and input under-voltage lockout. The BP2819 is available in thermally enhanced packages for high-power applications.
Product Series
BP
Primary Application
Industrial 24V/48V systems
Key Features
- Wide input voltage range 6V-100V
- Synchronous rectification
- Adjustable switching frequency
- Up to 2A output current
- Soft-start and tracking capability
- Comprehensive protection features
Specifications
| Input Voltage | 6V-100V |
|---|---|
| Output Current | Up to 2A |
| Output Voltage | 0.8V to 60V |
| Switching Frequency | 100kHz-1MHz |
| Efficiency | Up to 94% |
| Quiescent Current | <2mA |
| Package | ESOP-8 |
Applications
Industrial 24V/48V systems
Industrial automation and control
Automotive electronics
Automotive and EV electronics
Battery management systems
Battery and charging management
Telecom equipment
Electronic system design
Motor drive power supplies
Motor drive and control systems
FAE Expert Insights
"The BP2819 is an excellent solution for industrial applications with wide input voltage requirements. The 100V input capability makes it ideal for 48V industrial bus systems and automotive applications. In my experience with industrial power designs, this converter maintains good efficiency even at high input voltages where many converters struggle. The adjustable switching frequency is a valuable feature - I typically use lower frequencies (200-300kHz) for high-voltage applications to reduce switching losses. The synchronous rectification provides significant efficiency improvements over non-synchronous alternatives, especially at low output voltages. For thermally challenging applications, the ESOP-8 package with exposed pad provides good heat dissipation capability."
High-voltage buck converter ideal for 48V industrial and automotive applications
— Robert Li, BeiLuo
Frequently Asked Questions
What applications benefit from the 100V input capability?
The 100V input capability is beneficial for: 1) 48V industrial systems - common in factory automation and process control, 2) 24V industrial systems with high voltage transients, 3) Automotive applications - 12V and 24V systems with load dump transients up to 60-100V, 4) Telecom equipment - 48V DC power distribution, 5) Battery systems - high-voltage battery packs in EVs and energy storage. The wide input range provides design margin for voltage transients and allows direct connection to industrial bus voltages without pre-regulation.
Use BP2819 for 48V industrial systems and automotive applications. Contact LiTong for high-voltage design support.
How do I optimize efficiency at high input voltages?
Efficiency optimization at high input voltages: 1) Use lower switching frequency (100-200kHz) to reduce switching losses, 2) Select MOSFETs with low gate charge and optimized for high-voltage operation, 3) Use larger inductance to reduce ripple current and associated losses, 4) Optimize dead time to prevent shoot-through while minimizing body diode conduction, 5) Use appropriate gate drive voltage. At high Vin/Vout ratios, switching losses dominate. The BP2819's adjustable frequency allows optimization for your specific operating point.
Use lower switching frequencies for high input voltages. Contact LiTong for efficiency optimization guidance.
What PCB layout considerations are important for high-voltage designs?
High-voltage PCB layout priorities: 1) Creepage and clearance - maintain adequate spacing between high-voltage and low-voltage circuits (typically 2.5mm for 100V), 2) Switching node - minimize area to reduce EMI and capacitive coupling, 3) Grounding - use separate power and signal grounds, 4) Input filtering - place input capacitors close to the IC with short traces, 5) Thermal management - provide adequate copper area for heat dissipation. Follow IPC-2221 standards for creepage and clearance requirements.
Follow high-voltage layout guidelines or contact LiTong for PCB layout review services.
Can BP2819 be paralleled for higher output current?
The BP2819 is not designed for direct paralleling without additional circuitry. For higher current applications, consider: 1) Using a higher current converter like BP2308 (5A) or external power stage, 2) Implementing current sharing with external control circuitry, 3) Using multiple independent converters with load sharing. Direct paralleling of switching converters without current sharing can lead to uneven current distribution and potential instability. Contact BPSemi or LiTong for high-current design alternatives.
For applications above 2A, consider higher current converters or contact LiTong for high-current solutions.
What is the difference between standard and thermally enhanced packages?
The ESOP-8 (thermally enhanced) package includes an exposed metal pad on the bottom that can be soldered to a copper plane on the PCB for improved heat dissipation. This provides a thermal resistance (Rthja) typically 30-50% lower than standard packages. For high-power applications or high ambient temperatures, the thermally enhanced package is recommended. The exposed pad should be connected to a large copper area with multiple thermal vias for optimal heat dissipation. Follow the manufacturer's layout recommendations for thermal pad connection.
Use thermally enhanced packages for high-power or high-temperature applications. Contact LiTong for thermal design support.