TLP7820(D4ALF4 - 5000 Vrms Isolated Amplifier | Toshiba
부품 번호: TLP7820(D4ALF4 ✓ 활성TLP7820(D4ALF4 개요
An isolation amplifier is a precision signal-conditioning IC that transfers a low-voltage measurement signal across a galvanic isolation barrier while electrically separating the high-voltage and low-voltage domains. The TLP7820 uses optical isolation rather than a conductive connection between its two sides, helping reduce common-mode interference and protect low-voltage control electronics from high-side motor or inverter voltages.
Key features include one analog isolation channel, 5000 Vrms isolation, analog output, 5 V supply operation, and 230 kHz bandwidth. The SO8L (LF4) package supports compact isolated-sensing designs, while the optical isolation structure is intended for motor phase current and voltage sensing. The manufacturer describes the device as a high-speed isolation amplifier for efficient isolation amplification.
Toshiba positions the TLP7820 for electronic motor drives where an external shunt resistor converts phase current into a differential voltage that can be measured safely on the high-voltage side. The isolation amplifier then conveys that measurement to a controller or monitoring system across the isolation barrier. Its 230 kHz bandwidth supports current-loop and power-stage monitoring applications where the measured signal must follow dynamic phase-current changes.
The 5000 Vrms isolation rating is the central system-level specification. It helps engineers create a safety separation between power-conversion circuitry and low-voltage control logic, subject to the complete application’s creepage, clearance, insulation, and safety requirements. The operating voltage and electrical limits must be confirmed from the manufacturer datasheet before final design release.
Designers should pay particular attention to input common-mode range, output offset, gain, supply sequencing, shunt-resistor selection, and the analog isolation characteristics of the exact ordering code. The SO8L footprint should be checked against the PCB land pattern and creepage requirements before layout. This page consolidates manufacturer information, distributor availability, verified comparisons, and practical application guidance for engineers evaluating the TLP7820(D4ALF4.
The TLP7820 family is listed for RoHS-compliant surface-mount applications and is available through major distributors such as DigiKey, Mouser, Arrow, LCSC, and Octopart. Verify current lifecycle status, pricing, stock, and lead time directly with the selected authorized distributor.
드롭인 대체품: TLP7820(D4ALF4 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
TLP7820(D4BTP4,E
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TLP7820(D4BLF4,E
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TLP7820(D4,E
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TLP7820(B,E
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TLP7820(D4-B,E
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TLP7820(D4ALF4 최대 정격 & 전기적 특성
| Product Type | Optically isolated amplifier |
| Number of Channels | 1 channel |
| Isolation Voltage | 5000 Vrms |
| 공급 전압 | 5 V |
| 출력 유형 | Analog |
| Bandwidth | 230 kHz |
| 패키지 | SO8L (LF4), 8-pin |
| Package Family | SOIC-8 surface-mount family |
| 실장 유형 | Surface mount |
| Application Category | Motor phase current and voltage sensing |
| Isolation Technology | Photocoupler/photo-isolation |
| Typical Input Implementation | External shunt resistor differential voltage sensing |
| RoHS 상태 | RoHS |
TLP7820(D4ALF4 soic-8 surface-mount family 핀 구성 가이드
TLP7820(D4ALF4(soic-8 surface-mount family 패키지)의 핀 구성입니다. 이 아날로그 부품에는 입력, 출력, 전원 공급 핀이 있습니다. 오프셋 널, 보상, 인에이블 핀 구성은 제조사 데이터시트를 참조하십시오. 신호 컨디셔닝 및 증폭기 회로에 이상적입니다.
다음에 대한 상세 핀아웃 데이터 없음: TLP7820(D4ALF4.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
TLP7820(D4ALF4 적합 용도: 6 애플리케이션s: Motor Phase Current Sensing, Inverter Phase Current Monitoring, Industrial Motor Drive Control, Power Converter Feedback, Isolated Voltage Feedback, High-Voltage Equipment Protection.
Motor Phase Current Sensing
The TLP7820(D4ALF4 fits motor phase-current measurement because Toshiba identifies it as an isolation amplifier for electronic motor drives. In a typical circuit, motor current flows through an external shunt resistor and the resulting differential voltage is applied to the isolated input side. The device transfers the measurement through its optical isolation barrier to the controller side, while its 5000 Vrms isolation separates the high-voltage power stage from lower-voltage electronics. The 230 kHz bandwidth is suitable for monitoring dynamic phase-current behavior rather than only a static DC level. Final validation must confirm the shunt value, input common-mode range, gain, output scaling, and whether the selected ordering code has all required temperature and qualification attributes.
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Inverter Phase Current Monitoring
The TLP7820(D4ALF4 can monitor inverter phase current when the power stage requires a measured signal to be transferred across a high-voltage isolation boundary. Its single analog isolation channel accepts a shunt-derived voltage and provides an isolated analog representation for a controller or monitoring system. The 5 V operating arrangement and compact 8-pin SO8L package are useful in compact inverter control assemblies, while 5000 Vrms isolation supports a robust separation between primary and secondary domains. The application must still account for common-mode transients, shunt power dissipation, layout creepage and clearance, filtering, bandwidth requirements, and the exact absolute maximum and recommended operating conditions from the Toshiba datasheet.
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Industrial Motor Drive Control
The TLP7820(D4ALF4 supports current-feedback implementations in industrial motor-drive controllers where power-stage transients must not directly reach the control electronics. An external shunt converts phase or bus current into a measurable voltage, and the optically isolated amplifier transfers that information across a 5000 Vrms-rated barrier. Its 230 kHz bandwidth allows the measurement channel to follow relevant current transients, while the analog output supports straightforward connection to an analog-to-converter or control ASIC. For a production design, engineers should validate the control-loop bandwidth, shunt impedance and tolerance, isolation capacitance effects, PCB contamination rating, and thermal performance at the intended ambient temperature.
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Power Converter Feedback
The TLP7820(D4ALF4 can serve as the isolated measurement element in a power-converter feedback path where a shunt resistor represents high-side current and the control system requires galvanic separation. The device combines one analog isolation channel, a 5 V supply requirement, and 230 kHz bandwidth in an 8-pin SO8L package. Compared with a general-purpose amplifier, its isolation function helps prevent high-side ground currents and switching transients from corrupting the low-voltage control reference. Design verification should include the shunt's common-mode voltage, the amplifier input range, gain accuracy, output offset, propagation delay, filter selection, and the creepage and clearance required by the converter's insulation class.
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Isolated Voltage Feedback
The TLP7820(D4ALF4 can be evaluated for isolated voltage-feedback measurements in inverter and power-conversion systems where the manufacturer specifically lists motor phase current and voltage sensing as target applications. The 8-pin SO8L construction keeps the isolation amplifier compact, and the 5000 Vrms isolation rating provides a defined barrier capability for system partitioning. Because the supplied evidence does not expose a complete voltage-input range, gain table, or output transfer function, engineers must confirm whether the exact ordering code supports the proposed divider and attenuation network. PCB creepage, capacitor selection across the isolation barrier, input filtering, grounding, and the controller input range should be reviewed together.
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High-Voltage Equipment Protection
The TLP7820(D4ALF4 can help isolate a low-voltage sensing or protection channel from a high-voltage power system by transferring a measurement across its optical isolation barrier. This arrangement can reduce the amount of high-energy circuitry directly connected to a controller input and can help separate noisy motor or inverter domains from sensitive monitoring electronics. The verified 5000 Vrms isolation value is a component-level rating, not a complete safety certification for the finished product. Designers must still evaluate insulation type, working voltage, transient withstand, pollution degree, creepage, clearance, galvanic-isolation lifetime, and whether the broader application requires a specific industrial or automotive qualification.
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추천 제품 요약
엔지니어링 참조 데이터: TLP7820(D4ALF4 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | TLP7820(D4BTP4,E | TLP7820(D4BLF4,E | TLP7820(D4,E | TLP7820(B,E | TLP7820(D4-B,E |
|---|---|---|---|---|---|---|
| Package | SO8L (LF4), 8-pin | SO8L (LF4), 8-pin | SO8L (LF4), 8-pin | SO8L (LF4), 8-pin | SO8L (LF4), 8-pin | SO8L (LF4), 8-pin |
| Brand | Toshiba Semiconductor and Storage Corporation | Toshiba Semiconductor and Storage Corporation | Toshiba Semiconductor and Storage Corporation | Toshiba Semiconductor and Storage Corporation | Toshiba Semiconductor and Storage Corporation | Toshiba Semiconductor and Storage Corporation |
| Product Type | Optically isolated amplifier | Optically isolated amplifier | Optically isolated amplifier | Optically isolated amplifier | Optically isolated amplifier | Optically isolated amplifier |
| Number of Channels | 1 channel | 1 channel | 1 channel | 1 channel | 1 channel | 1 channel |
주요 차별점
- Purpose-built isolation for motor current measurement (vs TLP7820(D4BLF4,E)
- Defined 230 kHz measurement bandwidth (vs TLP7820(D4BTP4,E)
- 5000 Vrms isolated analog signal transfer (vs TLP7820(B,E)
- Compact 8-pin SO8L implementation (vs TLP7820(D4-B,E)
설계 노트
Do not treat the distributor suffix “E” and the abbreviated target string as proven to be interchangeable without checking the Toshiba ordering table. The verified distributor records use TLP7820(D4ALF4,E, while the target is TLP7820(D4ALF4. Confirm the catalogue number, packing option, lead orientation, temperature grade, and lifecycle status before substituting. Also verify the exact input common-mode range, gain, offset, supply limits, and output transfer curve; the supplied excerpts establish the 5000 Vrms isolation, 5 V operation, 230 kHz bandwidth, and 8-pin SO family, but not every electrical detail needed for a production drop-in decision.
Preserve the isolation barrier on the PCB rather than routing copper, ground, or mounting hardware across the input and output domains. The TLP7820 is specified at 5000 Vrms isolation and uses an 8-pin SO8L package, but component isolation voltage does not by itself establish finished-product safety. Confirm package creepage, clearance, working voltage, pollution degree, and any required slotting or keep-out from the Toshiba datasheet and applicable system insulation requirements. Keep the shunt and input-signal path close to the isolated input pins, and route output-side return current independently to the controller ground.
The 230 kHz bandwidth should be compared with the motor-drive switching spectrum and the control-loop bandwidth, not selected solely from the nominal value. Use the manufacturer’s input and output filter recommendations, and evaluate common-mode transients at the shunt node because the verified excerpts do not provide CMRR or input common-mode limits. Validate the complete signal path across temperature and supply tolerance, including shunt tolerance, amplifier gain accuracy, output offset, analog-to-converter noise, and the timing margin of the motor controller. Add filtering only after confirming that it does not destabilize the current-control loop.
Calculate the shunt dissipation before selecting its resistance, because the shunt converts motor current into the differential voltage presented to the TLP7820 input. Estimated: with a shunt resistance of 10 mΩ and peak current of 10 A, shunt power is I²R = 100 × 0.01 = 1 W, while the shunt voltage is 0.1 V. These values are design examples, not TLP7820 datasheet specifications. Select the actual shunt and amplifier gain from verified limits, and account for pulse duration, repetition rate, thermal resistance, ambient temperature, and tolerance when sizing the component.
규정 준수 정보
The verified Mouser and comparison excerpts identify the TLP7820 family as RoHS. REACH, lead-free, halogen-free, conflict-minerals, and AEC-Q100 status were not explicitly provided and therefore remain unknown.
