VIPER26LDTR - 800V 1.5A Off-Line Converter | STMicroelectronics
N.º de pieza: VIPER26LDTR ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $1.25 | $1,25 |
| 10 | $1.12 | $11,20 |
| 100 | $0.98 | $98,00 |
| 500 | $0.85 | $425,00 |
| 1.000 | $0.75 | $750,00 |
VIPER26LDTR Descripción general
An off-line converter is a power supply topology that directly converts the AC mains voltage to a regulated DC output without a line-frequency transformer. The VIPER26LDTR belongs to the family of integrated power switches, which combine the power transistor and control circuitry in a single package, reducing component count and simplifying PCB layout. This integration improves reliability and reduces electromagnetic interference (EMI) compared to discrete solutions.
Key features include a fixed 60kHz switching frequency, burst-mode operation for low standby power (<50mW at 265VAC), and built-in protection functions such as overcurrent, overvoltage, and thermal shutdown. The device also features a high-voltage startup circuit that eliminates the need for an external startup resistor, further reducing component count. The SO-8 package with exposed pad provides excellent thermal performance, with a thermal resistance of 60°C/W.
The VIPER26LDTR uses a current-mode control architecture with a built-in error amplifier, allowing direct feedback from the output via an optocoupler. The high-voltage startup circuit charges the VDD capacitor quickly, enabling fast startup even under heavy load. The device supports both isolated and non-isolated topologies, including flyback, buck, and buck-boost converters.
Typical applications include auxiliary power supplies for appliances, smart meters, industrial control systems, and LED lighting. The wide input range and low standby power make it ideal for always-on applications where energy efficiency is critical. The device is also suitable for IoT devices and smart home hubs that require a compact, efficient power supply.
When designing with the VIPER26LDTR, ensure proper transformer design for the target output power and maintain adequate creepage distances for high-voltage isolation. The exposed pad should be soldered to a large copper area for heat dissipation. The feedback loop must be compensated to ensure stability across the full load range.
Alternativas directas para VIPER26LDTR — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
VIPER26LN
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
VIPER27LD
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
VIPER28LD
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
VIPER26LDTR Valores máximos y características eléctricas
| Rango de tensión de entrada | 85 VAC to 265 VAC |
| Output Power | 8 W (typical, flyback) |
| Peak Current Limit | 1.5 A |
| Frecuencia de conmutación | 60 kHz |
| Breakdown Voltage | 800 V |
| Standby Power | <50 mW at 265 VAC |
| Temperatura de funcionamiento | -25°C to +150°C |
| Encapsulado | SO-8 (with exposed pad) |
| Tipo de montaje | Surface Mount |
| Control Mode | Current-mode |
| Burst Mode | Yes |
| Protection Features | Overcurrent, Overvoltage, Thermal Shutdown |
| Estado RoHS | Compliant |
| Nivel MSL | 3 |
| Resistencia térmica | 60 °C/W |
Configuración de pines de VIPER26LDTR
| Pin 1 | VDD — Power supply for the controller |
| Pin 2 | GND — Ground |
| Pin 3 | FB — Feedback input |
| Pin 4 | DRAIN — Drain of the power MOSFET |
| Pin 5 | DRAIN — Drain of the power MOSFET |
| Pin 6 | DRAIN — Drain of the power MOSFET |
| Pin 7 | DRAIN — Drain of the power MOSFET |
| Pin 8 | SOURCE — Source of the power MOSFET |
Aplicaciones típicas
VIPER26LDTR es adecuado para 6 aplicacións: Auxiliary Power Supplies, Smart Meters, Home Appliances, LED Lighting, Industrial Control Systems, IoT Devices.
Auxiliary Power Supplies
The VIPER26LDTR is ideal for auxiliary power supplies in appliances and industrial equipment. Its wide input voltage range and low standby power make it suitable for always-on applications. The integrated power switch reduces component count and simplifies design. With a typical output power of 8W, it can power control circuits, sensors, and communication interfaces. The burst mode operation ensures high efficiency at light loads, meeting energy efficiency regulations. The built-in protections enhance reliability in harsh environments.
Recomendado
Smart Meters
Smart meters require a reliable, efficient power supply that can operate from the mains. The VIPER26LDTR provides a compact solution with its integrated 800V MOSFET and controller. The low standby power (<50mW) helps meet energy efficiency standards. The wide input range ensures operation across different regions. The device's protection features safeguard against overcurrent and overvoltage conditions. The SO-8 package allows for a small form factor, ideal for space-constrained meter designs.
Recomendado
Home Appliances
In home appliances like washing machines and refrigerators, the VIPER26LDTR provides a cost-effective power supply for control boards. Its high-voltage startup circuit eliminates the need for external startup resistors, reducing component count. The burst mode operation reduces standby power, complying with energy regulations. The device's thermal shutdown protects against overheating. The SO-8 package is suitable for compact PCB layouts. The wide input range accommodates voltage fluctuations in residential settings.
Recomendado
LED Lighting
The VIPER26LDTR can be used in LED drivers for residential and commercial lighting. Its constant current capability, when configured with appropriate feedback, ensures stable LED current. The high efficiency and low standby power are beneficial for energy-saving lighting. The device's protection features prevent damage from overcurrent and overvoltage. The compact SO-8 package allows for slim LED driver designs. The wide input range supports universal mains operation.
Recomendado
Industrial Control Systems
Industrial control systems require robust power supplies that can handle wide input variations and provide reliable operation. The VIPER26LDTR's 800V MOSFET ensures high voltage capability, and its protection features enhance system reliability. The device can operate in harsh environments with its wide temperature range. The integrated controller simplifies design and reduces time-to-market. The low standby power is beneficial for systems that are always on. The SO-8 package is suitable for industrial PCBs.
Recomendado
IoT Devices
IoT devices often require a compact, efficient power supply that can be powered from the mains. The VIPER26LDTR provides a low-cost solution with its integrated power switch. The low standby power is crucial for devices that are always connected. The wide input range allows for global deployment. The device's small package size is ideal for space-constrained IoT modules. The burst mode operation ensures high efficiency at light loads, extending device lifespan.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para VIPER26LDTR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | VIPER26HD | VIPER26LN | VIPER26HN | VIPER27LD | VIPER28LD |
|---|---|---|---|---|---|---|
| Package | SO-8 | DIP-8 | SO-8 | DIP-8 | SO-8 | SO-8 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Breakdown Voltage | 800 V | 800 V | 800 V | 800 V | 800 V | 800 V |
| Peak Current Limit | 1.5 A | 1.5 A | 1.5 A | 1.5 A | 2 A | 2.5 A |
| Switching Frequency | 60 kHz | 60 kHz | 60 kHz | 60 kHz | 60 kHz | 60 kHz |
| Standby Power | <50 mW | <50 mW | <50 mW | <50 mW | <50 mW | <50 mW |
| Operating Temperature | -25°C to +150°C | -25°C to +150°C | -25°C to +150°C | -25°C to +150°C | -25°C to +150°C | -25°C to +150°C |
| RoHS | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant |
Diferenciadores clave
- Integrated 800V MOSFET (frente a TNY286PG)
- Low standby power (frente a LNK306PN)
- SO-8 package with exposed pad (frente a VIPER26HD)
Notas de diseño
The VIPER26LDTR in SO-8 package has a thermal resistance of 60°C/W. For 8W output, the power dissipation is typically 1-2W, resulting in a temperature rise of 60-120°C. Ensure adequate copper area on the PCB for heat dissipation, and consider a thermal pad connection to the ground plane.
Place the input bulk capacitor and output filter capacitor close to the IC to minimize loop area and reduce EMI. Use a star-ground topology to separate power ground from signal ground. The high-voltage DRAIN pins should have adequate creepage distance to low-voltage pins.
Do not exceed the maximum junction temperature of 150°C. Ensure the transformer is designed for the target output power and has proper isolation. The feedback loop must be compensated to avoid instability. Use a snubber circuit across the primary winding to suppress voltage spikes.
Información de cumplimiento
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified.
