TLP7820(D4-TP4 - 5kVrms Isolation Amplifier | Toshiba
Артикул: TLP7820(D4-TP4 ✓ АктивенTLP7820(D4-TP4 Обзор
An optically isolated amplifier belongs to the isolation-amplifier category within analog signal-conditioning ICs. Its role in the broader hierarchy is isolation amplifier → optically isolated amplifier → analog signal-conditioning IC → semiconductor. Optical isolation separates the input measurement domain from the output and system ground, helping reduce common-mode voltage effects and ground-loop hazards when measurements are taken at a high-side shunt or inside a power-conversion stage.
The principal verified features include one isolation channel, analog amplifier output, 5,000 Vrms isolation voltage, 230 kHz bandwidth, a 5 V supply indication, and an SO8L (LF4) package. The 230 kHz bandwidth provides useful signal bandwidth for motor phase-current measurement, while the 5,000 Vrms isolation rating supports applications requiring reinforced separation between the sensed circuit and downstream control electronics.
The manufacturer describes the TLP7820 as an isolation amplifier for electronic motor drives. In a typical implementation, motor current passes through an external resistor, the resulting analog voltage drop is sensed by the isolated input side, and the output side delivers an amplified analog signal for measurement, control, or protection. The external shunt and input-network design remain important because they determine the measurable current range, sensitivity, and practical power dissipation.
Typical uses include three-phase inverter phase-current sensing, motor-drive current feedback, power-converter monitoring, and isolated voltage sensing where a grounded controller must interface with a high-side or floating power stage. The same isolation-amplifier architecture can also support industrial current-measurement systems when its specified bandwidth, supply requirements, and isolation rating satisfy the application.
When designing around the TLP7820(D4-TP4, preserve the isolation barrier and follow the manufacturer’s input and output application circuits. Shunt resistance, input common-mode range, gain, supply decoupling, and PCB creepage must be checked against the actual motor-drive topology; the available verified data does not provide those detailed limits.
Аналоги без доработки для TLP7820(D4-TP4 — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
TLP7820(D4,E
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
TLP7820(TP4,E
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
TLP7820(B-LF4,E
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
TLP7820(A-TP4,E
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
TLP7820(D4-TP4 Максимальные параметры и электрические характеристики
| Product Type | Optically isolated amplifier |
| Number of Channels | 1 channel |
| Тип выхода | Analog output |
| Isolation Voltage | 5,000 Vrms |
| Bandwidth | 230 kHz |
| Напряжение питания | 5 V |
| Корпус | SO8L (LF4), 8 pins |
| Package Family | SOIC family, surface mount |
| Тип монтажа | Surface-mount |
| Primary Application | Motor phase-current and voltage sensing |
| Typical Input Signal | Voltage drop across an external shunt resistor |
| Isolation Technology | Photocoupler |
Руководство по цоколевке TLP7820(D4-TP4 в корпусе soic family, surface mount
Цоколевка для TLP7820(D4-TP4 (корпус soic family, surface mount). Этот аналоговый компонент имеет выводы входа, выхода и питания. Обратитесь к техническому описанию производителя для конфигураций выводов балансировки нуля, коррекции и разрешения. Идеально подходит для схем обработки сигналов и усилителей.
Нет подробных данных о распиновке для TLP7820(D4-TP4.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
TLP7820(D4-TP4 подходит для 6 применениеs: Three-Phase Inverter Phase-Current Sensing, Motor Drive Current Feedback, Isolated Voltage Sensing in Power Converters, Industrial Motor Control and Protection, Power-Supply Output Current Monitoring, Floating High-Side Measurement Interface.
Three-Phase Inverter Phase-Current Sensing
TLP7820(D4-TP4 fits three-phase inverter phase-current sensing because Toshiba identifies motor phase-current sensing as a primary use and specifies 5,000 Vrms isolation with a 230 kHz bandwidth. The amplifier is placed between a current-shunt measurement point and the controller ground domain, allowing the control system to monitor a switching power stage without sharing the same local ground. The 230 kHz bandwidth provides room for current information containing components associated with motor-drive dynamics. Designers must still select the shunt resistance, confirm the amplifier’s input common-mode limits, and verify that the switching-node voltage remains within the device’s specified operating conditions.
Рекомендуется
Motor Drive Current Feedback
The TLP7820(D4-TP4 is appropriate for motor-drive current feedback because its 230 kHz bandwidth can carry current-measurement information from an external shunt into an isolated analog control path. Toshiba’s manufacturer documentation describes motor current flowing through an external resistor and the resulting voltage drop being sensed by the isolation amplifier. This arrangement helps separate the high-current power stage from sensitive controller electronics while retaining an analog signal suitable for current-loop or protection functions. The shunt’s resistance and power rating, amplifier gain, propagation behavior, and PCB isolation geometry must be established from the complete manufacturer datasheet before production release.
Рекомендуется
Isolated Voltage Sensing in Power Converters
TLP7820(D4-TP4 can support isolated voltage sensing within power-converter control systems when the sensing network is implemented around its isolated input stage. Toshiba classifies the device among isolation amplifiers and isolated delta-sigma modulators, while the verified product result specifies analog output, 5,000 Vrms isolation, and 230 kHz bandwidth. These characteristics make the device relevant where a power-converter node must be measured by circuitry referenced to a separate ground domain. The useful tradeoff is that the isolation barrier simplifies grounding, but the external divider or shunt, input range, and output-side power requirements still determine sensitivity, accuracy, and practical implementation.
Рекомендуется
Industrial Motor Control and Protection
The TLP7820(D4-TP4 is suited to industrial motor-control and protection circuits that need a current or voltage feedback signal separated from a high-power motor stage. Its verified 230 kHz bandwidth provides substantially more signal bandwidth than a basic low-frequency isolated sensor, while the 5,000 Vrms isolation rating supports systems designed around a significant galvanic barrier. The device can contribute to overcurrent detection, torque-request feedback, or diagnostic monitoring when paired with an appropriate shunt or divider. Protection thresholds and control-loop compensation must be evaluated using the manufacturer’s complete gain, delay, accuracy, and common-mode specifications, which were not included in the supplied search data.
Рекомендуется
Power-Supply Output Current Monitoring
TLP7820(D4-TP4 can be applied to isolated output-current monitoring in power-supply systems where a shunt voltage must be communicated to a controller across a ground boundary. The 5,000 Vrms isolation capability is the principal reason to use an optically isolated amplifier rather than a conventional instrumentation amplifier, while the 230 kHz bandwidth permits faster current-transient information than a basic low-speed isolated signal path. In a practical circuit, the shunt and amplifier input network convert current into voltage, and the isolated analog output feeds monitoring or protection circuitry. Designers must verify input bias, gain error, output reference behavior, and supply compatibility against the full Toshiba datasheet before fixing component values.
Рекомендуется
Floating High-Side Measurement Interface
The TLP7820(D4-TP4 is relevant as an interface for floating high-side measurements in which the source of a shunt is not referenced to the system ground. Its verified 5,000 Vrms isolation rating provides the defining barrier between the measured power domain and the downstream electronics, while its analog output simplifies connection to a controller or measurement system. Toshiba specifically associates the device with motor phase-current and voltage sensing, making it more relevant than a general-purpose isolated amplifier in rotating-drive systems. A successful implementation still requires checking the permitted input common-mode range, shunt placement, isolation capacitance effects, PCB contamination and creepage, and whether 230 kHz bandwidth is appropriate for the selected protection threshold.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для TLP7820(D4-TP4 — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | TLP7820(D4,E | TLP7820(TP4,E | TLP7820(B-LF4,E | TLP7820(A-TP4,E |
|---|---|---|---|---|---|
| Package | SO8L (LF4), 8 pins | SO8L (LF4), 8 pins | SOIC-8 (TP4), 8 pins | SO8L (LF4), 8 pins | SOIC-8 (TP4), 8 pins |
| Brand | Toshiba | Toshiba | Toshiba | Toshiba | Toshiba |
| Number of Channels | 1 channel | 1 channel | 1 channel | 1 channel | 1 channel |
| Output Type | Analog output | Amplifier output | Amplifier output | Amplifier output | Amplifier output |
| Lifecycle Status | Active | Active | Active | Active | Active |
Ключевые отличия
- High isolation rating for an 8-pin isolation amplifier (против TLP7820(TP4,E)
- Designed specifically for electronic motor-drive sensing (против TLP7820(D4,E)
- Single analog isolation channel in a compact SO8L footprint (против TLP7820(B-LF4,E)
Заметки по проектированию
Treat the isolation barrier as a layout constraint rather than only a schematic symbol. Route the input-side shunt connection and output-side analog signal on their respective sides of the SO8L (LF4) package, avoid copper beneath the isolation region where the manufacturer specifies keep-out, and verify creepage, clearance, contamination, and working-voltage requirements against the complete datasheet. Incorrect barrier routing can undermine the device’s 5,000 Vrms isolation capability even when the circuit schematic is correct.
Do not substitute the TLP7820 family solely because a listing shows an 8-pin package. Confirm that the D4, TP4, A, B, and LF4 suffixes map to the required pin arrangement, terminal construction, and production packaging. The supplied comparison data supports matching 5,000 Vrms isolation and 230 kHz bandwidth, but it does not provide every terminal function or detailed ordering code. Use Toshiba’s current pin table and package drawing for an approved substitution.
The external shunt and input network establish the sensed-current sensitivity, bandwidth, noise, and power dissipation. Keep the high-current path short and use the manufacturer’s recommended input topology, with attention to input common-mode range, gain, offset, and output reference. Because the verified material specifies 230 kHz bandwidth but omits gain and accuracy details, calculate those values from the official datasheet before setting a motor-current protection threshold.
The verified listing indicates 5 V operation, but it does not provide supply-current limits or decoupling requirements. Follow Toshiba’s recommended input and output capacitors, and confirm output-side supply tolerances at the temperature and isolation conditions of the design. Keep sensitive analog traces away from motor-switching nodes and use a low-impedance ground reference on the output side so the analog signal is not corrupted by ground-return noise.
Информация о соответствии
The supplied verified snippets include a RoHS details field for a family comparison, but they do not explicitly state a compliant or non-compliant result. Compliance status therefore remains unknown rather than being inferred.
