VIPER26LD - 800V 1.5A Off-Line Converter | STMicroelectronics (Tape & Reel)
料号： VIPER26LD ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 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 |
VIPER26LD 概述
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 VIPER26LD 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 VIPER26LD 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 VIPER26LD, 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.
直接替换替代料： VIPER26LD ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
VIPER26LN
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
VIPER27LD
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
VIPER28LD
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
VIPER26LD 最大额定值与电气特性
| 输入电压范围 | 85 VAC to 265 VAC |
| Output Power | 8 W (typical, flyback) |
| Peak Current Limit | 1.5 A |
| 开关频率 | 60 kHz |
| Breakdown Voltage | 800 V |
| Standby Power | <50 mW at 265 VAC |
| 工作温度 | -25°C to +150°C |
| 封装 | SO-8 (with exposed pad) |
| 安装类型 | Surface Mount |
| Control Mode | Current-mode |
| Burst Mode | Yes |
| Protection Features | Overcurrent, Overvoltage, Thermal Shutdown |
| RoHS 状态 | Compliant |
| MSL 等级 | 3 |
| 热阻 | 60 °C/W |
VIPER26LD 引脚配置
| 引脚 1 | VDD — Power supply for the controller |
| 引脚 2 | GND — Ground |
| 引脚 3 | FB — Feedback input |
| 引脚 4 | DRAIN — Drain of the power MOSFET |
| 引脚 5 | DRAIN — Drain of the power MOSFET |
| 引脚 6 | DRAIN — Drain of the power MOSFET |
| 引脚 7 | DRAIN — Drain of the power MOSFET |
| 引脚 8 | SOURCE — Source of the power MOSFET |
典型应用
VIPER26LD 适用于 6 应用s: Auxiliary Power Supplies, Smart Meters, Home Appliances, LED Lighting, Industrial Control Systems, IoT Devices.
Auxiliary Power Supplies
The VIPER26LD 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.
推荐
Smart Meters
Smart meters require a reliable, efficient power supply that can operate from the mains. The VIPER26LD 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.
推荐
Home Appliances
In home appliances like washing machines and refrigerators, the VIPER26LD 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.
推荐
LED Lighting
The VIPER26LD 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.
推荐
Industrial Control Systems
Industrial control systems require robust power supplies that can handle wide input variations and provide reliable operation. The VIPER26LD'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.
推荐
IoT Devices
IoT devices often require a compact, efficient power supply that can be powered from the mains. The VIPER26LD 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.
推荐
推荐产品汇总
工程参考数据： VIPER26LD ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Integrated 800V MOSFET （对比 TNY286PG)
- Low standby power （对比 LNK306PN)
- SO-8 package with exposed pad （对比 VIPER26HD)
设计说明
The VIPER26LD 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.
合规信息
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified.
