TLP7820(A-LF4 - 5 kVrms Isolated Amplifier | Toshiba
料号： TLP7820(A-LF4 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $11.3258 | $11.33 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
TLP7820(A-LF4 概述
An isolation amplifier is an analog signal-conditioning IC that combines input amplification, modulation across a galvanic isolation barrier, and signal reconstruction at the output. Unlike a conventional voltage amplifier, its primary purpose is to measure a differential signal while maintaining high-voltage isolation. This places it in the isolated-sensing branch of the industrial, power-conversion, and motor-control semiconductor hierarchy.
Key verified characteristics include a 3 V to 5.5 V supply range, differential sensing, 5000 Vrms isolation, and analog output. Toshiba identifies motor phase current sensing and inverter current or voltage sensing as primary use cases. In a typical motor-drive circuit, motor current flows through an external shunt resistor and the resulting differential voltage is measured by the amplifier.
The device architecture provides an analog output while preserving a reinforced-style isolation barrier up to the verified 5000 Vrms rating. Its single-channel SO8L package supports compact isolated signal-conditioning layouts, but the exact pin assignments, input range, bandwidth value, propagation behavior, accuracy limits, and temperature limits must be taken from the manufacturer datasheet.
Typical applications include three-phase inverter phase-current measurement, DC motor control, industrial inverter monitoring, power-supply current feedback, and isolated analog voltage sensing. The differential architecture suits shunt-based measurements where common-mode voltage is elevated or varies with the switching environment.
PCB design should preserve creepage and clearance around the isolation barrier, keep input and output grounds separate, and place the shunt path and amplifier inputs according to the manufacturer layout guidance. Filtering near the sensor input may be needed if switch-node transients exceed the device limits; component values should not be inferred without the complete datasheet specifications.
This page consolidates the verified manufacturer and distributor information, separates confirmed TLP7820 characteristics from unavailable parameters, and provides engineering-oriented application and sourcing context rather than treating packaging-code variants as engineering alternatives.
直接替换替代料： TLP7820(A-LF4 ——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：
TLP7820 (D4ALF4,E
✅ 直接替换📋 参考替代料（不在目录中）
TLP7820 (LF4,E
✅ 直接替换📋 参考替代料（不在目录中）
TLP7820 (TP4,E
✅ 直接替换📋 参考替代料（不在目录中）
TLP7820 (A,E
✅ 直接替换📋 参考替代料（不在目录中）
TLP7820(A-LF4.E(O
✅ 直接替换📋 参考替代料（不在目录中）
TLP7820(A-LF4 最大额定值与电气特性
| Product Type | Optically isolated isolation amplifier |
| Number of Channels | 1 channel |
| 输出类型 | Analog output |
| Input Type | Differential |
| Supply Voltage Range | 3 V to 5.5 V |
| Isolation Voltage | 5000 Vrms |
| 封装 | SO8L (LF4) |
| 安装类型 | Surface mount |
| Primary Application | Motor phase current and voltage sensing |
| Inverter Sensing | Current and voltage sensing |
| EN IEC 60747-5-5 Qualification | Option D4 mentioned in manufacturer datasheet |
| Safety Isolation | Galvanic isolation between input and output domains |
TLP7820(A-LF4 so8l (lf4) 引脚配置指南
TLP7820(A-LF4（so8l (lf4) 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： TLP7820(A-LF4.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TLP7820(A-LF4 适用于 6 应用s: Three-Phase Inverter Phase-Current Sensing, DC Motor Current Feedback, Isolated Voltage Sensing in Power Supplies, Industrial Inverter Monitoring, Isolated Analog Sensor Interface, Power-Module Feedback Conditioning.
Three-Phase Inverter Phase-Current Sensing
The TLP7820(A-LF4 fits inverter phase-current measurement because it combines differential input, analog output, and 5000 Vrms isolation in an SO8L (LF4) package. A shunt resistor in the switching phase develops the measurement voltage, while the isolation amplifier transfers the signal to a controller on the other side of the barrier. The verified manufacturer positioning explicitly names motor phase-current sensing. Design the shunt and input network from the complete input-range and accuracy specifications, and verify that switch-node transients remain within the amplifier limits. The principal benefit is electrical separation of the power-stage measurement from the low-voltage control domain without relying on a non-isolated differential amplifier.
推荐
DC Motor Current Feedback
The TLP7820(A-LF4 is suitable for DC motor current feedback when the controller must monitor a shunt-derived voltage across a substantial ground or power-domain boundary. Its differential input structure matches the polarity of a shunt measurement, while the 3 V to 5.5 V supply range supports low-voltage mixed-signal designs. The analog output provides a conventional signal for an ADC or control loop, subject to the unavailable gain and bandwidth values. Place the shunt and input connections to minimize pickup from motor current edges, and check the datasheet for common-mode range, settling behavior, and isolation capacitance before finalizing the circuit.
推荐
Isolated Voltage Sensing in Power Supplies
The TLP7820(A-LF4 can be evaluated for isolated voltage feedback in power-conversion systems where the measured node is electrically separated from the controller. The verified Toshiba product page lists voltage sensing alongside current sensing, and its differential input allows the designer to develop a scaled differential signal from a suitable sensing network. The 5000 Vrms isolation is the defining system-level feature, but it does not by itself establish final reinforced-insulation compliance. Check the complete safety ratings, package creepage, working voltage, capacitor requirements, and application circuit in the manufacturer documentation before applying it to a safety-critical isolated supply.
推荐
Industrial Inverter Monitoring
The TLP7820(A-LF4 supports industrial inverter monitoring by transferring phase or bus-related measurements across an isolation barrier. That arrangement helps keep high-energy switching circuitry separated from a controller or data-acquisition channel. Toshiba specifically identifies motor phase current and inverter current/voltage sensing as application areas. For an industrial implementation, account for common-mode transients, PCB contamination, barrier creepage, and the available 3 V to 5.5 V supply range. Because the supplied evidence does not provide input range, accuracy, bandwidth, or temperature limits, those parameters should be treated as release-gating data rather than inferred from the 5000 Vrms isolation specification.
推荐
Isolated Analog Sensor Interface
The TLP7820(A-LF4 can be used as the isolated signal-conditioning element in a sensor interface when the source is differential and the destination requires an analog voltage. The device is not a universal sensor amplifier: its input range, gain, accuracy, bandwidth, and output swing must be confirmed from the manufacturer datasheet before selecting divider or shunt values. Its isolation barrier can reduce the need for a local ground connection on the sensor side, improving safety and simplifying grounding in industrial systems. Use short input traces, controlled return routing, and appropriately separated input and output ground planes. Validate the complete channel against sensor noise, common-mode voltage, and required response time.
推荐
Power-Module Feedback Conditioning
The TLP7820(A-LF4 is relevant to power-module feedback conditioning where a shunt or divider measures converter current or voltage in a high-side or floating domain. Its differential input and analog output make it a natural bridge between the power stage and an ADC or controller, while 5000 Vrms isolation separates those domains. The design trade-off is that isolation introduces component area, propagation limits, and input-to-output coupling that must be checked against the control-loop bandwidth. The verified results do not supply loop delay or bandwidth values, so compensation should begin only after those values are obtained from the Toshiba datasheet and measured on the target board.
推荐
推荐产品汇总
工程参考数据： TLP7820(A-LF4 ——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 | TLP7820 (D4ALF4,E | TLP7820 (LF4,E | TLP7820 (TP4,E | TLP7820 (A,E | TLP7820(A-LF4.E(O |
|---|---|---|---|---|---|---|
| Brand | Toshiba Semiconductor and Storage | Toshiba Semiconductor and Storage | Toshiba Semiconductor and Storage | Toshiba Semiconductor and Storage | Toshiba Semiconductor and Storage | Toshiba Semiconductor and Storage |
| Package | SO8L (LF4) | SO8L-class listing; exact package detail not fully supplied | SO8L (LF4) | 8-pin SO listing; exact package detail not fully supplied | SO8L-class listing; exact package detail not fully supplied | SO8L-class listing; exact package detail not fully supplied |
关键差异点
- Confirmed isolation rating for high-side current measurement （对比 TLP7820 (LF4,E)
- Analog isolated signal conditioning （对比 TLP7820 (TP4,E)
- Direct alignment with inverter sensing （对比 TLP7820 (D4ALF4,E)
设计说明
Keep the TLP7820 input-side and output-side return paths physically separated and route them according to the manufacturer isolation layout. Do not allow high-current shunt returns or switching-node copper to pass beneath or across the barrier unless the datasheet permits it. Use the SO8L footprint only after checking pin numbering and exposed or connected metal details against the official mechanical drawing.
Place shunt-resistor connections and the amplifier input network close together, preferably as a compact Kelvin-style sense path. Minimize loop area and avoid sharing high-current return copper with the measured signal. The isolated amplifier can reject common-mode effects only within its specified range; verify transients, input capacitance, and filtering using the complete manufacturer application circuit.
Do not assume that 5000 Vrms isolation specifies usable signal bandwidth or common-mode range. The supplied data confirms the isolation rating but does not provide bandwidth, gain, settling time, or input limits. Those values must be obtained from the Toshiba datasheet before setting amplifier bandwidth, ADC sample rate, or control-loop compensation. If the sensor path is fast, include filtering only after checking its effect on phase delay.
合规信息
The supplied manufacturer and distributor results mention EN IEC 60747-5-5 Option D4 in the datasheet result, but do not provide explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. Compliance status must be confirmed from current Toshiba documentation.
