TLP7820(LF4 - 5000 Vrms Isolated Amplifier | Toshiba
料号： TLP7820(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(LF4 概述
An isolation amplifier is a signal-conditioning IC that combines an input stage, an isolation barrier, and an output stage. The input stage measures a differential voltage, the barrier transfers that information while maintaining galvanic separation, and the output stage produces an analog voltage for an analog-to-digital converter or controller. In a motor-drive circuit, this arrangement measures voltage across a shunt resistor without connecting the high-voltage power stage directly to the controller ground.
The verified data highlights analog output, differential operation, 5000 Vrms isolation, one circuit, and a 3 V to 5.5 V supply range. These features are directly relevant to current sensing in power converters and inverters. The isolation barrier allows sensing information to cross from a noisy power environment to a control domain while maintaining the required separation between those domains.
Toshiba’s product page identifies the TLP7820 as an isolation amplifier and isolated delta-sigma modulator product. The manufacturer data retrieved for the device describes current sensing in electronic motor drives, where motor current flows through an external resistor and the resulting voltage drop is sensed. The D4 qualification information references EN IEC 60747-5-5 option D4 for designated part-number conventions, while the standard LF4 designation is used for the package and ordering variant shown here.
Typical applications include three-phase inverter current sensing, motor phase-current measurement, DC-link voltage sensing in inverter systems, power-factor correction current feedback, and isolated gate-driver monitoring. The component is most appropriate when the analog sensor signal must remain galvanically isolated from a controller or ADC input.
The primary design consideration is maintaining the manufacturer-specified layout and isolation-clearance requirements. The input network, shunt connection, output filtering, supply decoupling, and isolation barrier must be laid out according to the Toshiba datasheet. The verified data does not provide every pin name, electrical limit, thermal value, or timing parameter, so those details remain marked for data-needed rather than estimated.
直接替换替代料： TLP7820(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(D4-LF4,E
✅ 直接替换📋 参考替代料（不在目录中）
TLP7820(A-LF4,E
✅ 直接替换📋 参考替代料（不在目录中）
TLP7820(B-LF4,E
✅ 直接替换📋 参考替代料（不在目录中）
TLP7820(D4BLF4,E
✅ 直接替换📋 参考替代料（不在目录中）
TLP7820(D4ALF4,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(LF4 最大额定值与电气特性
| Product Type | Optically isolated amplifier |
| Isolation Amplifier and Isolated Delta-Sigma Modulator Product | Isolation amplifier |
| 输出类型 | Analog output |
| Number of Channels | 1 circuit |
| Differential Operation | Differential |
| Isolation Voltage | 5000 Vrms |
| Supply Voltage Range | 3 V to 5.5 V |
| 封装 | SO8L (LF4) |
| Case and Package | 8-SO |
| Package Width | 7.50 mm |
| Package Length | 0.295 in |
| 安装类型 | Surface mount |
| Primary Application | Motor phase current and voltage sensing |
| Secondary Application | Inverter current and voltage sensing |
| Typical Sensing Method | External resistor voltage-drop sensing |
| D4 Qualification Reference | EN IEC 60747-5-5 option (D4) |
| RoHS 状态 | Compliant |
TLP7820(LF4 0.295 in 引脚配置指南
TLP7820(LF4（0.295 in 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(LF4.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TLP7820(LF4 适用于 6 应用s: Three-Phase Inverter Current Sensing, Motor Phase-Current Feedback, Inverter DC-Link Voltage Sensing, Power-Factor Correction Current Feedback, Isolated Gate-Driver Monitoring, Industrial Motor-Control Feedback.
Three-Phase Inverter Current Sensing
The Toshiba TLP7820(LF4 fits three-phase inverter current sensing because it combines differential analog sensing with 5000 Vrms isolation in an 8-pin SO8L (LF4) package. Place the component across the voltage drop produced by a phase-current shunt, then route the analog output toward the controller ADC without electrically joining the power domain to the control domain. This isolation is valuable when the inverter switching node swings rapidly and the controller needs a protected measurement interface. The verified manufacturer data specifically identifies inverter current sensing and motor phase-current sensing, but the exact input range, common-mode limits, bandwidth, accuracy, and output scaling must be confirmed from the Toshiba datasheet before sizing the shunt and protection network.
推荐
Motor Phase-Current Feedback
TLP7820(LF4 is appropriate for motor phase-current feedback because Toshiba describes the device for sensing the analog voltage drop across an external resistor in electronic motor drives. The differential input structure can measure the shunt voltage while the optically isolated barrier separates the high-current power stage from the control circuitry. The analog output is suitable for a controller or ADC input, subject to the device’s verified supply range of 3 V to 5.5 V and manufacturer-defined electrical limits. Designers should check Kelvin routing, shunt placement, common-mode voltage, filtering, and the isolation clearance required by the final motor-drive safety architecture.
推荐
Inverter DC-Link Voltage Sensing
The TLP7820(LF4 can support inverter voltage monitoring when the sensed node requires an isolated analog measurement path. Its verified 5000 Vrms isolation rating and differential analog architecture provide a logical interface between a high-energy inverter bus and a lower-energy control system. The device is especially relevant where switching-node transients, ground-potential differences, or safety-related separation prevent a conventional grounded amplifier from being used. The exact maximum input voltage, input impedance, output reference, and frequency response are not present in the retrieved data and must be taken from the manufacturer datasheet. PCB creepage, clearance, and barrier construction are as important as electrical selection.
推荐
Power-Factor Correction Current Feedback
TLP7820(LF4 is suitable for isolated current feedback in power-factor-correction converters when the controller and switching stage require galvanic separation. The differential sensing capability allows the converter to monitor the voltage drop across an external current-sense resistor, while the analog output provides a signal for control-loop processing. Toshiba’s verified product positioning emphasizes motor drives and inverter sensing, but the same isolation principle is applicable to power-conversion current loops. Before using it in a PFC design, engineers should verify input common-mode range, propagation delay, bandwidth, accuracy, supply current, and output drive against the controller requirements. The 3 V to 5.5 V supply range is a useful constraint for low-voltage digital control systems.
推荐
Isolated Gate-Driver Monitoring
TLP7820(LF4 can be used to monitor a sensed current or voltage associated with an isolated gate-driver power stage. The isolation barrier helps prevent the high-side or power-side sensing node from being referenced to the low-voltage controller, while the analog output provides a measurement signal for protection, diagnostics, or closed-loop control. This arrangement is useful in inverter systems where driver fault detection and phase-current feedback are required. The verified data does not include the TLP7820’s full propagation-delay, accuracy, transient immunity, or common-mode specifications, so the design must include margins based on the official Toshiba datasheet. Layout should keep sensitive analog traces short and avoid routing them across the isolation barrier.
推荐
Industrial Motor-Control Feedback
TLP7820(LF4 supports industrial motor-control designs that need isolated analog current or voltage feedback between a power converter and a controller. The verified 5000 Vrms isolation specification and 3 V to 5.5 V supply range suit low-voltage control electronics, while the SO8L (LF4) package supports compact surface-mount implementation. Use the part in the sensing path of a three-phase drive, industrial inverter, or protected power module, with the shunt or divider network designed around the datasheet input limits. The key engineering trade-off is that isolation improves safety and noise separation but adds component cost, barrier-layout constraints, and dependence on accurate sensor-network design.
推荐
推荐产品汇总
工程参考数据： TLP7820(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(D4-LF4,E | TLP7820(A-LF4,E | TLP7820(B-LF4,E | TLP7820(D4BLF4,E | TLP7820(TP4,E |
|---|---|---|---|---|---|---|
| Package | SO8L (LF4) | 8-SO / LF4 | 8-SO / LF4 | 8-SO / LF4 | 8-SO / LF4 | 8-SO / TP4 |
| 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 |
| Output Type | Analog output | Amplifier | Isolated amplifier | Isolated amplifier | Isolated amplifier | Isolated amplifier |
| Number of Circuits | 1 circuit | 1 circuit | 1 circuit | 1 circuit | 1 circuit | 1 circuit |
关键差异点
- Verified isolation specification （对比 TLP7820(TP4,E)
- Motor-drive application positioning （对比 TLP7820(D4-LF4,E)
- Differential analog measurement interface （对比 TLP7820(A-LF4,E)
设计说明
Use the Toshiba datasheet layout as the authority for isolation creepage, clearance, barrier placement, and input/output routing. Keep the shunt or sensed-voltage traces short and pair them according to the recommended differential-input topology. Route the isolated-side ground and supply return independently from the power-stage return, and avoid copper, pours, vias, test points, or component bodies that bridge the isolation barrier. The supplied data does not specify exact spacing values, so do not infer them from the package drawing.
Do not treat 5000 Vrms isolation as permission to reduce the system safety design. The isolation rating is one device-level specification; the completed inverter or industrial control product must also satisfy its working voltage, pollution degree, insulation coordination, transient requirements, and applicable safety standards. Confirm the exact ordering suffix and qualification option because the retrieved material distinguishes the standard TLP7820 family from D4-qualified variants.
Design the sensing network around the verified differential analog measurement function and the manufacturer’s input limits. Use a low-noise, low-thermal-drift shunt or divider appropriate for the current range, provide Kelvin connections where possible, and place input filtering close to the isolation amplifier. Check common-mode voltage, propagation delay, bandwidth, and output settling against the motor-control timing; those values are [DATA_NEEDED: complete electrical timing specifications].
The verified TLP7820(LF4 supply range is 3 V to 5.5 V. Power the isolated output or control side from a clean source that remains within that range under startup and load transients. Decouple the supply according to the Toshiba application guidance, and account for isolation-module power requirements when the amplifier is used with a digital isolator or isolated gate driver. Supply current, quiescent current, and external-component recommendations are [DATA_NEEDED: power specifications].
合规信息
The verified distributor data identifies the related Toshiba TLP7820 listing as RoHS-compliant. Retrieved Toshiba material references EN IEC 60747-5-5 option D4, but the exact LF4 ordering code’s REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals status was not supplied.
