VIPER37HDTR - 800V Offline High-Voltage Converter | STMicroelectronics
N.º da peça: VIPER37HDTR ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $1.25 | $1,25 |
| 10 | $1.12 | $11,20 |
| 100 | $0.98 | $98,00 |
| 500 | $0.85 | $425,00 |
| 1.000 | $0.72 | $720,00 |
VIPER37HDTR Visão geral
An offline high-voltage converter, also known as a switched-mode power supply (SMPS) controller, is a power management IC that converts AC mains voltage directly to a regulated DC output without requiring a separate bulky line-frequency transformer. It integrates the power switch (MOSFET) and control logic into a single package, simplifying the design of AC-DC power supplies. This category sits within the broader hierarchy: offline converter -> AC-DC converter -> power management IC -> semiconductor. The VIPER37HDTR belongs to the VIPER37 family, which is part of ST's VIPER series of offline converters known for high-voltage robustness and low standby power.
Key features include an 800V avalanche-rugged power section, a 60kHz fixed switching frequency, and a standby power consumption of less than 50mW at no load. The device offers a complete set of protection features: overvoltage protection (OVP), overcurrent protection (OCP), thermal shutdown, and a built-in soft-start. The SO-8 package provides a compact footprint with a thermal resistance of 85°C/W, making it suitable for space-constrained power supplies.
The VIPER37HDTR uses a current-mode control architecture with a high-voltage startup circuit, eliminating the need for an external startup resistor. This reduces component count and improves efficiency. The integrated 800V MOSFET ensures reliable operation in harsh mains environments, and the device is designed to meet energy-efficiency standards such as Energy Star and Blue Angel.
Typical applications include auxiliary power supplies for home appliances, smart meters, LED lighting drivers, and industrial control systems. The wide input voltage range and low standby power make it ideal for always-on applications where energy efficiency is critical.
When designing with this device, ensure proper transformer design to maintain stable operation across the full load range. The feedback loop must be compensated to avoid instability, and the PCB layout should minimize parasitic inductance in the high-current paths.
Alternativas drop-in para VIPER37HDTR — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
VIPER37LDTR
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
VIPER38HDTR
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
VIPER37HE
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
LNK304
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
NCP1014
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
VIPER37HDTR Classificações máximas e características elétricas
| Output Power (wide input 85-265VAC) | 20 W |
| Output Power (European 230VAC) | 30 W |
| Breakdown Voltage | 800 V |
| Frequência de comutação | 60 kHz |
| Standby Power | <50 mW |
| Temperatura de junção de operação | -40C to +150C |
| Encapsulamento | SO-8 |
| Tipo de montagem | Surface Mount |
| Thermal Resistance (theta_JA) | 85 C/W |
| Soft-start | Built-in |
| Overvoltage Protection | Yes |
| Proteção contra sobrecorrente | Yes |
| Desligamento térmico | Yes |
| Status RoHS | Compliant |
| Nível MSL | 1 |
Configuração de pinos do VIPER37HDTR
| Pino 1 | VCC — Supply voltage for the controller |
| Pino 2 | GND — Ground |
| Pino 3 | FB — Feedback input for output regulation |
| Pino 4 | DRAIN — Drain of the integrated MOSFET |
| Pino 5 | DRAIN — Drain of the integrated MOSFET |
| Pino 6 | DRAIN — Drain of the integrated MOSFET |
| Pino 7 | DRAIN — Drain of the integrated MOSFET |
| Pino 8 | GND — Ground |
Aplicações típicas
VIPER37HDTR é adequado para 6 aplicaçãos: Auxiliary Power Supplies, LED Lighting Drivers, Smart Meters, Home Appliances, Industrial Control Systems, IoT Devices.
Auxiliary Power Supplies
The VIPER37HDTR provides a compact, efficient solution for auxiliary power supplies in home appliances, smart meters, and industrial control systems. Its 800V MOSFET and integrated controller reduce component count, while the low standby power (<50mW) helps meet energy-efficiency regulations. In a typical application, the VIPER37HDTR converts AC mains to a regulated DC output (e.g., 5V or 12V) to power microcontrollers, sensors, and communication interfaces. The wide input range (85-265VAC) ensures operation across global mains voltages. The built-in protection features (OVP, OCP, thermal shutdown) enhance reliability in harsh environments. Designers should ensure proper transformer design and feedback compensation to maintain stable operation across load variations.
Recomendado
LED Lighting Drivers
The VIPER37HDTR is well-suited for LED lighting drivers, providing constant voltage or constant current output with high efficiency. Its 60kHz switching frequency allows for a compact transformer, reducing the overall size of the LED driver. The low standby power is beneficial for lighting systems that remain in standby mode. In a typical LED driver application, the VIPER37HDTR regulates the output to drive a string of LEDs, with feedback from the output to maintain constant current. The 800V MOSFET ensures reliable operation in mains-powered environments. Designers should consider thermal management, as the SO-8 package has a thermal resistance of 85°C/W, and may need to derate output power at high ambient temperatures.
Recomendado
Smart Meters
Smart meters require reliable, efficient power supplies that operate continuously. The VIPER37HDTR's low standby power (<50mW) and wide input range make it ideal for this application. It provides a regulated DC supply for the metering IC, communication module, and display. The integrated protection features ensure long-term reliability in outdoor environments. In a smart meter, the VIPER37HDTR typically converts 85-265VAC to a 5V or 3.3V rail. The 60kHz switching frequency allows for a small transformer, fitting within the meter's compact enclosure. Designers should ensure proper isolation between the primary and secondary sides to meet safety standards.
Recomendado
Home Appliances
The VIPER37HDTR is used in home appliances such as washing machines, refrigerators, and air conditioners for auxiliary power supplies. Its wide input range and low standby power help appliances meet energy-efficiency standards. The integrated 800V MOSFET provides robustness against mains transients. In a typical appliance, the VIPER37HDTR powers the control board, sensors, and user interface. The compact SO-8 package saves PCB space, and the built-in soft-start reduces inrush current. Designers should consider the thermal environment inside appliances, which may require derating or additional cooling.
Recomendado
Industrial Control Systems
In industrial control systems, the VIPER37HDTR provides a reliable power supply for PLCs, sensors, and actuators. Its wide input range (85-265VAC) accommodates varying mains conditions, and the protection features (OVP, OCP, thermal shutdown) ensure safe operation in demanding environments. The 60kHz switching frequency reduces transformer size, enabling compact designs. In a typical industrial application, the VIPER37HDTR converts AC mains to a 24V or 12V DC rail. The low standby power is beneficial for systems that remain in standby mode. Designers should ensure proper isolation and EMI filtering to meet industrial standards.
Recomendado
IoT Devices
The VIPER37HDTR is suitable for IoT devices that require a compact, efficient power supply from AC mains. Its low standby power (<50mW) is critical for always-on IoT devices that must minimize energy consumption. The wide input range allows operation in different regions. In a typical IoT device, the VIPER37HDTR provides a regulated DC supply for the microcontroller, wireless module, and sensors. The integrated 800V MOSFET and controller reduce component count, simplifying the design. Designers should consider the thermal constraints of the SO-8 package and may need to derate output power in enclosed environments.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para VIPER37HDTR — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | VIPER37LDTR | VIPER38HDTR | LNK304 | NCP1014 |
|---|---|---|---|---|---|
| Package | SO-8 | SO-8 | SO-8 | SO-8 | SO-8 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | Power Integrations | onsemi |
| Output Power (wide input) | 20 W | 10 W | 30 W | 12 W | 19 W |
| Breakdown Voltage | 800 V | 800 V | 800 V | 700 V | 700 V |
| Switching Frequency | 60 kHz | 60 kHz | 60 kHz | 66 kHz | 65 kHz |
| Standby Power | <50 mW | <50 mW | <50 mW | <50 mW | <100 mW |
| Protection Features | OVP, OCP, Thermal Shutdown | OVP, OCP, Thermal Shutdown | OVP, OCP, Thermal Shutdown | OVP, OCP, Thermal Shutdown | OVP, OCP, Thermal Shutdown |
| Pin Compatibility | Reference | Pin-compatible | Pin-compatible | Verify pinout | Verify pinout |
Principais diferenciais
- Higher breakdown voltage (800V) than some competitors (vs LNK304)
- Lower standby power (<50mW) compared to NCP1014 (vs NCP1014)
- Same-brand family compatibility (vs VIPER37LDTR)
Notas de projeto
The VIPER37HDTR integrates an 800V MOSFET and PWM controller, simplifying the design of AC-DC power supplies. Ensure the transformer is designed for the 60kHz switching frequency to minimize core losses. The feedback loop must be compensated to maintain stability across the full load range. Use a proper snubber circuit to clamp voltage spikes from the transformer leakage inductance.
The SO-8 package has a thermal resistance of 85°C/W. At 20W output, the power dissipation can be significant, so ensure adequate PCB copper area for heat sinking. In high-temperature environments, derate the output power or add a heatsink. The junction temperature must not exceed 150°C.
Place the input capacitor, transformer, and output capacitor close to the VIPER37HDTR to minimize parasitic inductance. Use a solid ground plane for the primary side and keep the high-current paths short. For EMI compliance, add a common-mode choke and Y-capacitor at the input. Follow the layout guidelines in the ST application notes.
Informações de conformidade
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified. Halogen-free status not specified in the provided data.
