STP85NF55 - 85A, 55V N-Channel Power MOSFET | STMicroelectronics
부품 번호: STP85NF55 ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $1.25 | $1.25 |
| 10 | $1.12 | $11.20 |
| 100 | $0.98 | $98.00 |
| 500 | $0.87 | $435.00 |
| 1,000 | $0.79 | $790.00 |
STP85NF55 개요
A Power MOSFET is a type of field-effect transistor optimized for switching and amplification in power electronics. It operates by controlling the flow of current between the drain and source terminals through an electric field generated by the gate voltage. Power MOSFETs are essential components in power management ICs, motor drivers, and switching regulators, where they handle high voltages and currents with low on-resistance and fast switching speeds.
Key features of the STP85NF55 include a low on-resistance (RDS(on)) of at VGS=10V, which minimizes conduction losses, and a fast switching speed that reduces switching losses in high-frequency applications. The device also offers a wide operating temperature range of -55°C to +175°C, ensuring reliability in harsh environments. The TO-220 package allows for easy mounting on heatsinks, enabling efficient thermal management.
The STP85NF55 utilizes STMicroelectronics' advanced PowerMESH™ technology, which provides a robust and reliable structure for high-current handling. The device features a low gate charge (Qg) of , which reduces the drive requirements and improves efficiency in high-frequency switching circuits. The built-in diode offers fast reverse recovery, making it suitable for applications requiring freewheeling diodes.
Typical applications include switch-mode power supplies (SMPS), DC-DC converters, motor control circuits, and automotive systems. The high current rating and low on-resistance make it ideal for battery management systems and power distribution. In motor control, the fast switching speed ensures precise control of motor speed and torque.
When designing with this device, ensure adequate gate drive voltage (typically 10V) to achieve the lowest on-resistance. The TO-220 package requires proper heatsinking to manage power dissipation, especially at high currents. Consider the thermal resistance (RthJA) of to calculate the junction temperature under load.
드롭인 대체품: STP85NF55 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
STP80NF55
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
STP85NF55-1
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
IRF3205
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
FDP85N06
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
STP85NF55 최대 정격 & 전기적 특성
| Drain-to-Source Voltage (VDS) | 55 V |
| Continuous Drain Current (ID) at 25°C | 85 A |
| Gate-to-Source Voltage (VGS) | ±20 V |
| 동작 온도 범위 | -55°C to +175°C |
| 패키지 | TO-220 |
| 실장 유형 | Through Hole |
| RoHS 상태 | Compliant |
STP85NF55 핀 구성
| 핀 1 | Gate — Gate terminal for controlling the MOSFET |
| 핀 2 | Drain — Drain terminal, connected to the load |
| 핀 3 | Source — Source terminal, connected to ground |
안전 동작 영역
일반적인 애플리케이션
STP85NF55 적합 용도: 6 애플리케이션s: Switch-Mode Power Supplies (SMPS), DC-DC Converters, Motor Control, Battery Management Systems (BMS), Automotive Systems, Power Distribution.
Switch-Mode Power Supplies (SMPS)
The STP85NF55 is used as a switching element in SMPS due to its high current rating and low on-resistance. In a typical SMPS, the MOSFET switches at high frequency to regulate output voltage. The low RDS(on) minimizes conduction losses, improving efficiency. The fast switching speed reduces switching losses, making it suitable for high-frequency operation. The TO-220 package allows for easy heatsinking, ensuring reliable operation under high power dissipation. Compared to other MOSFETs, the STP85NF55 offers a good balance of current handling and thermal performance, making it ideal for power supplies up to several hundred watts.
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DC-DC Converters
In DC-DC converters, the STP85NF55 acts as a high-side or low-side switch. Its high current capability (85A) supports converters with high output current. The low gate charge reduces drive requirements, simplifying the gate driver circuit. The fast switching speed enables high-frequency operation, reducing the size of inductors and capacitors. The wide operating temperature range ensures reliability in industrial environments. The TO-220 package facilitates thermal management, allowing continuous operation at high power levels. The STP85NF55 is particularly suited for buck converters in telecom and server applications where efficiency and reliability are critical.
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Motor Control
The STP85NF55 is used in motor control circuits for driving DC motors, brushless DC motors, and stepper motors. Its high current rating allows it to handle the inrush current of motors. The fast switching speed enables PWM control for precise speed and torque regulation. The low on-resistance minimizes power loss in the motor drive stage. The TO-220 package allows for heatsinking, which is essential for continuous motor operation. In H-bridge configurations, the STP85NF55 can be used as a high-side or low-side switch. Its robustness and thermal performance make it suitable for industrial motor drives and automotive applications.
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Battery Management Systems (BMS)
In battery management systems, the STP85NF55 is used for battery protection and charge/discharge control. Its high current rating (85A) supports high-capacity battery packs. The low on-resistance reduces power loss during charging and discharging, improving efficiency. The wide operating temperature range ensures reliable operation in various environments. The TO-220 package allows for heatsinking, which is important for high-current applications. The fast switching speed enables rapid disconnection in fault conditions, protecting the battery from overcurrent and short circuits. The STP85NF55 is suitable for electric vehicles, power tools, and energy storage systems.
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Automotive Systems
The STP85NF55 is used in automotive systems such as electronic control units (ECUs), power steering, and lighting. Its high current rating and wide temperature range (-55°C to +175°C) make it suitable for under-hood applications. The low on-resistance minimizes power loss, improving fuel efficiency. The fast switching speed enables efficient PWM control for motors and actuators. The TO-220 package allows for heatsinking, ensuring reliable operation in high-temperature environments. The STP85NF55 is also used in automotive DC-DC converters for powering infotainment systems and sensors. Its robustness and reliability make it a preferred choice for automotive power management.
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Power Distribution
The STP85NF55 is used in power distribution systems for load switching and protection. Its high current rating (85A) allows it to handle large loads. The low on-resistance minimizes voltage drop across the switch, ensuring efficient power delivery. The fast switching speed enables rapid response to fault conditions. The TO-220 package allows for heatsinking, which is essential for high-current applications. The wide operating temperature range ensures reliable operation in industrial environments. The STP85NF55 is suitable for use in power distribution units (PDUs), server power supplies, and industrial control systems.
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추천 제품 요약
엔지니어링 참조 데이터: STP85NF55 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | STP80NF55 | STP85NF55-1 | IRF3205 | FDP85N06 |
|---|---|---|---|---|---|
| Package | TO-220 | TO-220 | TO-220 | TO-220 | TO-220 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | Infineon | onsemi |
| Drain-to-Source Voltage (VDS) | 55 V | 55 V | 55 V | 55 V | 60 V |
| Continuous Drain Current (ID) at 25°C | 85 A | 80 A | 85 A | 110 A | 85 A |
| Gate-to-Source Voltage (VGS) | ±20 V | ±20 V | ±20 V | ±20 V | ±20 V |
| Operating Temperature Range | -55°C to +175°C | -55°C to +175°C | -55°C to +175°C | -55°C to +175°C | -55°C to +175°C |
| Automotive Grade | No | No | Yes (AEC-Q101) | No | No |
주요 차별점
- Higher continuous drain current (85A) compared to STP80NF55 (vs STP80NF55)
- Automotive grade variant available (STP85NF55-1) (vs STP85NF55)
- Lower on-resistance compared to IRF3205 (vs IRF3205)
설계 노트
The STP85NF55 in TO-220 package requires adequate heatsinking for high-current operation. At 85A and VDS=10V, power dissipation is significant. Use a heatsink with thermal resistance low enough to keep junction temperature below 175°C. Calculate the required heatsink using the thermal resistance from junction to ambient (RthJA) and the power dissipation.
For through-hole TO-220 package, ensure proper soldering and mechanical support. Use a heatsink with thermal compound for efficient heat transfer. Keep gate drive traces short to minimize inductance and ringing. Place a gate resistor (e.g., 10Ω) to dampen oscillations.
Do not exceed the maximum VDS of 55V or VGS of ±20V. Ensure the gate drive voltage is at least 10V to achieve the lowest on-resistance. Avoid operating in the linear region for extended periods to prevent thermal runaway. Use a freewheeling diode across inductive loads to protect the MOSFET from voltage spikes.
규정 준수 정보
RoHS compliant per STMicroelectronics product page. AEC-Q101 qualification available on STP85NF55-1 variant.
