TLP7920(D4-A - 5000 Vrms Isolation Amplifier | Toshiba
MPN： TLP7920(D4-A ✓ 啟用中TLP7920(D4-A 概覽
An isolation amplifier is an optically isolated signal-conditioning device that combines input amplification, electrical isolation, and output conditioning. In the signal-chain hierarchy, it sits between a sensor or shunt resistor and an analog-to-digital converter or motor-control controller. Its purpose is to preserve measurement information while providing galvanic separation between the input-side power domain and the output-side control domain.
The TLP7920 family uses an input-side sigma-delta analog-to-digital conversion technique according to the Toshiba datasheet. The measured input is converted into a digital representation for optical transfer across the isolation barrier, then reconstructed as an analog output on the secondary side. This architecture is intended for current sensing in electronic motor drives, where the sensed voltage across an external shunt is small and isolation from high switching nodes is required.
Key application parameters include the 5000 Vrms isolation rating, analog output, gain rank A, 8-DIP package, and a documented operating-temperature range of -40 C to +105 C. The family is associated with a minimum common-mode transient immunity of 15 kV/us. These features make it relevant to motor-control systems, inverter current sensing, phase-current monitoring, and isolated voltage-sensing circuits.
When designing around the TLP7920, the shunt or sensing resistor must remain within the input range and power rating of the device, while the controller-side supply and analog input limits must also be respected. The DIP-8 package simplifies through-hole assembly and provides a conventional isolation-amplifier footprint. Because the verified data does not provide complete electrical limits, pin names, pricing tiers, or guaranteed alternative cross-references, those fields remain explicitly marked as data needed rather than inferred.
This page combines Toshiba manufacturer information, distributor product records, and the supplied cross-reference results into a technically cautious product reference. It emphasizes application fit, isolation considerations, and the distinction between verified device information and parameters that still require confirmation from the complete manufacturer datasheet.
直接替換替代品，適用於 TLP7920(D4-A — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： TLP7920(D4-A （相同外形與佔位） — 差異在於 Mounting Type, Operating Temperature Range, Output Type.
TLP7920(D4-A,F
✅ 直接替換📋 參考替代品（不在目錄中）
TLP7920(D4,F
✅ 直接替換📋 參考替代品（不在目錄中）
TLP7920(F
✅ 直接替換聯絡詢價
查看資料表 →TLP7920(D4-LF1,F
✅ 直接替換📋 參考替代品（不在目錄中）
TLP7920(D4-A 最大額定值與電氣特性
| Device Type | Optically isolated isolation amplifier |
| 輸出類型 | Analog output |
| Isolation Voltage | 5000 Vrms |
| Number of Circuits | 1 circuit |
| Gain Rank | Rank A |
| 封裝 | 8-DIP |
| 腳位數 | 8 pins |
| 安裝類型 | Through-hole DIP |
| Input Conversion Technology | Sigma-delta ADC |
| Typical Application | Motor phase-current and voltage sensing |
| 工作溫度範圍 | -40 C to +105 C |
| Common-Mode Transient Immunity | 15 kV/us minimum |
TLP7920(D4-A 8-dip 腳位配置指南
TLP7920(D4-A（8-dip 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： TLP7920(D4-A.
請參閱 資料表 以查看完整腳位配置。
典型應用
TLP7920(D4-A 適用於 6 應用s: Motor Phase-Current Sensing, Inverter Current Monitoring, Isolated Voltage Sensing, Power-Converter Feedback, Industrial Motor Drive Control, Isolated Sensor Interface.
Motor Phase-Current Sensing
The TLP7920(D4-A fits motor phase-current sensing because Toshiba identifies the family for electronic motor drives and uses isolation to transfer a shunt-derived signal away from the power stage. A current-sense resistor produces a small voltage proportional to phase current; the isolation amplifier conditions and transfers that measurement to a controller. Its stated 5000 Vrms isolation supports a high-voltage separation strategy, while the -40 C to +105 C range covers industrial environments. Confirm shunt amplitude, input range, bandwidth, and controller limits from the full datasheet before sizing the external resistor.
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Inverter Current Monitoring
The TLP7920(D4-A is suitable for inverter current monitoring where a controller must observe power-stage current across a reinforced isolation boundary. Toshiba explicitly lists inverter current and voltage sensing as an application for the TLP7920 family. The analog output can feed a controller-side ADC or comparator network, while the input side handles the sensed voltage. The 15 kV/us minimum common-mode transient immunity specification is relevant to switching environments, but PCB creepage, clearance, filtering, and timing must be validated against the complete application requirements.
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Isolated Voltage Sensing
The TLP7920(D4-A can be used for isolated voltage sensing when a voltage-divider or sensing-network signal must be measured without connecting the high-voltage domain to the controller ground. The device’s isolation amplifier architecture and analog output make it appropriate for a protected measurement interface. Its 5000 Vrms rating is the primary verified isolation figure, but the usable working voltage depends on the complete datasheet, package geometry, PCB clearances, contamination conditions, and safety requirements. A designer should not infer reinforced-system compliance from the component rating alone.
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Power-Converter Feedback
The TLP7920(D4-A is relevant to power-converter feedback circuits that require an isolated measurement signal between a switching power stage and a supervisory controller. Its analog output allows a standard controller-side ADC to observe the sensed condition, while the isolation barrier reduces common-mode coupling between the high-energy and low-energy domains. The input-side sigma-delta conversion approach identified in the Toshiba datasheet search supports precision isolated measurement. Exact bandwidth, settling time, and input common-mode requirements must be obtained before selecting loop compensation or sampling timing.
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Industrial Motor Drive Control
The TLP7920(D4-A suits industrial motor-drive control because it combines an isolation amplifier function with an operating-temperature range of -40 C to +105 C and an isolation rating of 5000 Vrms. It can help a controller monitor current or voltage while the power stage operates at elevated electrical stress. The through-hole 8-DIP package supports conventional assembly and serviceability. For production use, engineers should verify transient immunity, propagation behavior, supply requirements, error specifications, and the recommended PCB layout in the complete Toshiba documentation.
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Isolated Sensor Interface
The TLP7920(D4-A can form the isolated front end of a sensor interface when a low-level sensor output must be measured in a different ground domain. The input-side conversion and optical isolation provide a signal path without a direct conductive connection between the sensor domain and the control domain. The analog output is compatible with controller-side signal acquisition when the output range and settling behavior are confirmed. Designers should pay particular attention to input bias, offset, gain accuracy, supply sequencing, and the time required for the isolated signal to settle after a motor-control transition.
推薦
推薦產品摘要
工程參考資料，適用於 TLP7920(D4-A — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | TLP7920(D4-A,F | TLP7920(D4,F | TLP7920(F | TLP7920(D4-LF1,F |
|---|---|---|---|---|---|
| Package | 8-DIP | 8-DIP - same package | 8-DIP - same package | 8-DIP - same package | 8-DIP - same package |
| Brand | Toshiba Semiconductor and Storage | Toshiba Semiconductor and Storage | Toshiba Semiconductor and Storage | Toshiba Semiconductor and Storage | Toshiba Semiconductor and Storage |
| Output Type | Analog output | Analog output | Analog output | Analog output | Analog output |
| Number of Circuits | 1 circuit | 1 circuit | 1 circuit | 1 circuit | 1 circuit |
| Operating Temperature Range | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C |
主要差異化特點
- Verified isolation rating of 5000 Vrms (對比TLP7920(D4-A,F)
- Analog output for isolated measurement (對比TLP7920(D4,F)
- Motor-drive application alignment (對比TLP7920(F)
- Temperature coverage (對比TLP7920(D4-LF1,F)
設計說明
Treat the isolated input and output regions as separate PCB domains. Keep the isolation barrier copper and package geometry aligned with the manufacturer’s recommended layout, and do not route high-voltage switching-node copper beneath or across the isolation boundary. Verify creepage, clearance, package geometry, and the required safety standard for the actual working voltage before fabrication.
Do not select the TLP7920 solely from the 5000 Vrms isolation figure. The complete design must also confirm input common-mode range, shunt amplitude, gain accuracy, offset, bandwidth, supply voltage, output loading, and settling behavior against the motor-drive control loop. The supplied data does not provide those complete limits, so obtain the Toshiba datasheet before sizing passive components.
The TLP7920 family is specified for -40 C to +105 C, but the supplied data does not provide power dissipation, thermal resistance, or maximum internal power. In an industrial motor-drive environment, check the device dissipation under the actual input, output, and isolation conditions, provide adequate copper and through-hole thermal paths where applicable, and verify the maximum ambient temperature at the actual board location.
Motor-drive switching edges can couple into the sensing path even when the isolation amplifier is used. Keep the shunt connection short, use a controlled input-filter network based on the required bandwidth, and route the isolated output away from high-dv/dt power-node traces. Evaluate filter components against the device’s verified bandwidth and settling requirements rather than adding arbitrary capacitance.
The suffix notation is important when purchasing or replacing this device. The verified results refer to TLP7920(D4-A, TLP7920(D4-A,F, TLP7920(D4,F, TLP7920(F, and TLP7920(D4-LF1,F, but the supplied material does not provide a complete manufacturer ordering table for every suffix. Confirm the exact part number, package form, approval markings, and lead-free status before placing a production order.
合規資訊
The verified distributor snippets mention VDE approval for TLP7920 (D4-A,F and X36 Pb-F, but the supplied data does not provide a complete compliance declaration for the target MPN. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status therefore remain unknown.