TLP7820(A-TP4 - 5kVrms Isolated Amplifier | Toshiba
部品番号: TLP7820(A-TP4 ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $2.1049 | $2.10 |
| 10 | $2.1049 | $21.05 |
| 100 | $2.1049 | $210.49 |
| 500 | $2.1049 | $1,052.45 |
| 1,000 | $2.1049 | $2,104.90 |
TLP7820(A-TP4 概要
An isolation amplifier is an analog signal-conditioning IC that transfers voltage information across a galvanically isolated barrier while electrically separating high-voltage circuitry from the low-voltage control domain. In the application hierarchy, the TLP7820 belongs to isolation amplifiers, optically isolated amplifiers, signal-conditioning ICs, analog ICs, and semiconductor devices. Its isolation barrier helps prevent ground faults and high common-mode potentials from reaching measurement, protection, or control electronics.
Toshiba identifies the TLP7820 as an analog-output isolation amplifier rated to 5000 Vrms. The official product description specifically targets current sensing in electronic motor drives, where an external resistor produces a voltage proportional to motor current. The TLP7820 senses that voltage across its isolated input side and presents the result on the non-isolated output side. The provided records also associate the device with power-inverter current sensing.
The isolation mechanism is optical within a photocoupler-type package. Optical isolation breaks the direct conductive path between input and output while preserving the intended analog signal relationship. In practical systems, the amplifier is paired with a precision shunt resistor, power-supply bypassing, an analog acquisition stage, and a controller such as a motor-drive MCU. Exact gain, bandwidth, input range, common-mode limits, supply requirements, and accuracy must be confirmed in the manufacturer datasheet before release to production.
Typical uses include three-phase motor-drive shunt sensing, inverter leg-current measurement, power-converter feedback, and isolated analog-voltage sensing across a high-voltage barrier. Unlike ordinary operational amplifiers placed directly beside a shunt, the TLP7820 provides a defined isolation function suited to systems where the sensed node can sit at a hazardous or elevated potential.
PCB design should preserve the isolation barrier by maintaining the package creepage and clearance required by the working voltage and applicable safety requirements. Place input-side and output-side ground returns independently, route copper so isolation barriers cannot be bridged by solder, test pads, or silkscreen-dependent features, and use stable references and supply decoupling appropriate for the measurement accuracy required.
This page consolidates the verified Toshiba product-page data, distributor identification, sourcing links, and engineering cautions that are not presented together in the manufacturer overview. Because the supplied web records do not expose a complete parametric datasheet, unsupported values are intentionally marked for verification rather than inferred from generic isolation-amplifier specifications.
ドロップイン代替品: TLP7820(A-TP4 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
TLP7820(A-TP4,E
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TLP7820(TP4,E
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TLP7820(A-TL,E
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TLP7820(D4ATP4,E
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TLP7820(D4,E
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TLP7820(A-TP4 最大定格＆電気的特性
| Product Type | Photocoupler isolation amplifier |
| Isolation Output | Analog |
| Differential Circuit Count | 1 circuit |
| Isolation Voltage | 5000 Vrms |
| パッケージ | SO8L (LF4), 8 pins |
| Supplier Package Description | 8-SO |
| Nominal Package Width | 7.50 mm |
| 実装タイプ | Surface mount |
| Primary Application | Motor phase-current sensing |
| Additional Application | Power-inverter current and voltage sensing |
| Input Sensing Method | Voltage generated across an external current-sense resistor |
| ライフサイクル状態 | Active |
| DigiKey Orderable Part | TLP7820(A-TP4,E |
| DigiKey Ordering Code | 264-TLP7820(A-TP4)ETR-ND |
| DigiKey Category | Isolation Amplifiers |
| RoHS ステータス | ROHS3 Compliant |
| Moisture Sensitivity Level | MSL 1 (Unlimited) |
TLP7820(A-TP4 7.50 mm ピン配置ガイド
TLP7820(A-TP4 (7.50 mm パッケージ) のピン配置。 このアナログコンポーネントは、入力、出力、および電源ピンを備えています。オフセットナル、補償、イネーブルピンの設定については、メーカーのデータシートを参照してください。信号調整やアンプ回路に最適です。
詳細なピン配置データはありません: TLP7820(A-TP4.
詳細は データシート をご参照ください。
主な用途
TLP7820(A-TP4 の用途: 6 件s: Three-Phase Motor-Phase Current Sensing, Power-Inverter Leg Current Measurement, Isolated DC-Link Voltage Feedback, Industrial Motor-Control Feedback, Bidirectional DC-Link Current Sensing, Isolated Power-Converter Feedback.
Three-Phase Motor-Phase Current Sensing
The TLP7820(A-TP4 fits isolated shunt measurements in three-phase motor drives because Toshiba identifies it specifically for electronic motor phase-current sensing. An external resistor converts phase current into a differential voltage, and the device transfers that measurement across a 5000 Vrms isolation barrier to the controller domain. This lets a motor-control MCU monitor current without sharing a direct ground connection with the power stage. Before schematic release, verify the datasheet limits for input voltage, common-mode voltage, gain, bandwidth, propagation delay, and supply rails. The shunt resistance must keep worst-case sensing voltage inside the supported range, while PCB routing must preserve isolation creepage and clearance.
おすすめ
Power-Inverter Leg Current Measurement
The TLP7820(A-TP4 is suitable for a power-inverter feedback channel when a shunt sits in a switching leg and its voltage must be observed without a conductive connection to the controller ground. Its verified 5000 Vrms isolation capability separates the sensed power node from downstream analog and digital circuitry, while the analog output supports proportional current feedback. Layout remains critical: route shunt connections tightly, keep high-dv/dt switching copper away from the low-level output side, and maintain the package's isolation barrier without copper bridges. Confirm the complete datasheet for operating voltage, transient response, bandwidth, and isolation lifetime before treating it as a production-qualified inverter-interface device.
おすすめ
Isolated DC-Link Voltage Feedback
Toshiba explicitly associates the TLP7820 with inverter voltage sensing, making it applicable to an isolated high-voltage feedback channel rather than only phase-current measurement. A scaled voltage from the DC link can be conditioned on the isolated input side and referenced to the controller ground through the device's analog output. The 5000 Vrms isolation rating is the key verified system attribute, but it does not by itself establish the maximum repetitive working voltage or transient withstand. Engineers must confirm both from the manufacturer datasheet and applicable end-product safety requirements. The feedback divider, input network, output filter, and ground architecture should be designed only after those limits are known.
おすすめ
Industrial Motor-Control Feedback
The TLP7820(A-TP4 supports industrial motor-control systems that require measurement signals to cross a high-potential barrier between a power stage and low-voltage control electronics. Its analog output can feed a controller input or analog front end, allowing current or voltage information to be used for regulation, protection, and diagnostics. The verified package is 8-pin SO8L (LF4), which supports conventional surface-mount assembly. Production design still requires exact gain, input-range, supply, common-mode, temperature, and accuracy data from Toshiba. For factory equipment, review the applicable insulation, creepage, clearance, and EMC requirements rather than treating 5000 Vrms as the complete safety qualification.
おすすめ
Bidirectional DC-Link Current Sensing
The TLP7820(A-TP4 can be considered for a shunt location where current may flow in either direction and the controller requires a proportional isolated signal. Its differential isolation-amplifier configuration is suited to sensing a resistor-generated voltage rather than a standalone high voltage. Direction handling, zero-current offset, output saturation, and acquisition scaling must be evaluated against the complete electrical characteristics, none of which are included in the supplied search extracts. Firmware can use the measurement for torque control, overcurrent protection, or energy monitoring after calibration. Do not select the shunt value from nominal current alone; include tolerance, power rating, amplifier range, common-mode excursion, and fault-current response.
おすすめ
Isolated Power-Converter Feedback
The TLP7820(A-TP4 can bridge a scaled analog feedback signal from an isolated power-converter domain to its controller. This topology can support current-mode or voltage-mode control when the design needs electrical separation between the switching power stage and the control system. The verified 5000 Vrms isolation specification supports evaluating the part for reinforced isolation applications, but operating voltage, insulation aging, bandwidth, and transient immunity must be checked in the official document. Place the feedback divider or shunt entirely on the designated isolated side and provide clean, decoupled supplies on both sides. Validate loop delay and noise behavior at the intended switching frequency because isolation-amplifier bandwidth can materially affect control stability.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: TLP7820(A-TP4 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | TLP7820(A-TP4,E | TLP7820(TP4,E | TLP7820(A-TL,E | TLP7820(D4ATP4,E | TLP7820(D4,E |
|---|---|---|---|---|---|---|
| Brand | Toshiba | Toshiba | Toshiba | Toshiba | Toshiba | Toshiba |
| Package | SO8L (LF4), 8 pins | SO8L (LF4), 8 pins | SO8L (LF4), 8 pins | 8-SOIC, same identified family package | 8-SOIC, same identified family package | SOIC-8, same identified family package |
| Isolation Type | Photocoupler isolation amplifier | Photocoupler isolation amplifier | Photocoupler isolation amplifier | Isolation amplifier | Isolation amplifier | Optocoupler isolation amplifier |
| Primary Application | Motor phase-current and inverter voltage sensing | Current sensing | Current and power management | Current sensing and power management | Current sensing and power management | Current sensing and power management |
主な差別化要因
- Application-specific isolation for motor-drive measurement （vs TLP7820(TP4,E)
- Verified 5000 Vrms isolation rating （vs TLP7820(A-TL,E)
- Single differential analog measurement channel （vs TLP7820(D4ATP4,E)
設計ノート
Preserve a continuous isolation barrier across the SO8L footprint. Do not place high-voltage, low-voltage, ground, test-point, or silkscreen-dependent copper features that bridge the isolation gap unless the package and safety strategy explicitly permit them. Route each ground domain independently to its side of the device, and verify creepage, clearance, working voltage, pollution degree, and insulation requirements against the final enclosure and safety standard.
Keep the shunt or sensing-node traces short, symmetrical, and away from switching-current paths. The TLP7820's exact common-mode range, gain, bandwidth, and settling behavior are unavailable in the supplied extracts, so verify them from the Toshiba datasheet before selecting series resistance, filtering, or shunt impedance. Estimated: if the shunt is RSHUNT and peak current is IPEAK, the required sensing voltage is VSHUNT = IPEAK × RSHUNT; select RSHUNT only after confirming that value and its power remain inside the supported input and thermal limits.
Provide stable, decoupled supplies on both isolated sides and follow the manufacturer capacitor recommendations exactly; required voltage and capacitance values are not present in the supplied records. Do not infer output behavior during startup, enable sequencing, fault conditions, or output saturation from general isolation-amplifier conventions. Validate these conditions with the official datasheet and, where safety or precision is critical, with production-level fault and common-mode tests.
コンプライアンス情報
The supplied component-analysis result states ROHS3 Compliant, REACH Unaffected, and MSL 1 (Unlimited). It does not state AEC-Q100 qualification or provide lead-free, halogen-free, or conflict-minerals declarations for this exact suffix.
