TLP7920(D4-LF1 - 5kVrms Isolated Analog Amplifier
料号： TLP7920(D4-LF1 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.9971 | $1.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
TLP7920(D4-LF1 概述
An isolation amplifier is an analog signal-conditioning IC that transfers a low-voltage measurement across a high-voltage barrier while maintaining galvanic separation between the sensed circuit and the measurement system. It is commonly used where a motor phase current, inverter current, or power-converter signal must be monitored without connecting the high-energy circuit to low-voltage control electronics. The TLP7920 family is intended for electronic motor drives, where external resistors convert phase current into a measurable voltage.
The verified data specifies analog output, 5000 Vrms isolation, and a 3.0 V to 5.5 V output-side supply. Search results also identify an 8-SMD package and a typical output-side supply current of 6.2 mA. The TLP7920(D4-LF1,F ordering code includes the manufacturer’s D4 qualification option; the manufacturer document search result references EN IEC 60747-5-5 option D4, but no additional device-specific parameters were supplied here.
The isolation amplifier provides a defined interface between a current-sense resistor and the downstream measurement electronics. In a motor-drive implementation, the sensed voltage is applied to the isolated input side, and the analog output is generated on the output side. This arrangement helps protect control circuitry from high common-mode voltage and ground-potential differences. The exact input range, gain, bandwidth, accuracy, propagation delay, and common-mode limits must be confirmed from the manufacturer datasheet before final design release.
Typical applications include three-phase motor inverter monitoring, motor phase-current measurement, inverter current sensing, power-factor monitoring, industrial motor control, and isolated analog measurement. The device is suitable when the design requires reinforced signal separation and an analog output rather than a digital isolated communication interface. The 8-SMD format also supports surface-mount assembly, although the exact PCB land pattern and pin numbering must be taken from the Toshiba datasheet.
Designers should verify the input resistor, output-side supply, decoupling, isolation barrier, creepage and clearance, and analog filtering requirements against the manufacturer datasheet. The isolated barrier is a safety and reliability boundary, so PCB layout must preserve the required spacing and avoid placing high-voltage copper beneath or across the isolation region. This page consolidates verified manufacturer and distributor information, available replacement context, and practical design guidance without inventing unprovided electrical values.
直接替换替代料： TLP7920(D4-LF1 ——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：
TLP7920(D4,F
✅ 直接替换📋 参考替代料（不在目录中）
TLP7920(D4-A,F
✅ 直接替换📋 参考替代料（不在目录中）
TLP7920(D4-TP1,F
✅ 直接替换📋 参考替代料（不在目录中）
TLP7920F
✅ 直接替换📋 参考替代料（不在目录中）
TLP7920
✅ 直接替换📋 参考替代料（不在目录中）
TLP7920(D4-LF1 最大额定值与电气特性
| Product Type | Optically isolated analog isolation amplifier |
| Number of Circuits | 1 circuit |
| Input Configuration | Differential |
| 输出类型 | Analog |
| Isolation Voltage | 5000 Vrms |
| Output-Side Supply Voltage | 3.0 V to 5.5 V |
| Typical Output-Side Supply Current | 6.2 mA |
| 封装 | 8-SMD |
| 安装类型 | Surface mount |
| Application | Motor phase current and voltage sensing |
| Isolation Technology | Photocoupler |
| D4 Qualification Option | Manufacturer document references EN IEC 60747-5-5 option D4 |
| Product Family | TLP7920 |
| Supplier Classification | Isolation amplifier |
TLP7920(D4-LF1 8-smd 引脚配置指南
TLP7920(D4-LF1（8-smd 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： TLP7920(D4-LF1.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TLP7920(D4-LF1 适用于 6 应用s: Three-Phase Motor Inverter, Motor Phase-Current Sensing, Inverter Current and Voltage Monitoring, Industrial Motor Control, Power-Factor Monitoring, Isolated Analog Measurement Interface.
Three-Phase Motor Inverter
The TLP7920(D4-LF1 fits inverter current monitoring because it is an optically isolated, analog-output amplifier intended for motor phase-current sensing. A shunt resistor can convert a motor phase current into a voltage that crosses the device’s isolation barrier without directly connecting the high-voltage inverter node to the controller. The verified data confirms 5000 Vrms isolation and a 3.0 V to 5.5 V output-side supply, while the shunt value, input range, accuracy, and bandwidth must be selected from the Toshiba datasheet. This arrangement is useful when the control system requires analog current information and reinforced separation from the power stage.
推荐
Motor Phase-Current Sensing
The TLP7920(D4-LF1 can be placed in the feedback path of a motor phase-current measurement circuit when the design requires an isolated analog signal. Toshiba describes the TLP7920 family as intended for electronic motor drives, where current flows through an external resistor and the resulting voltage is sensed. The 5000 Vrms isolation rating supports barrier planning, and the 8-SMD format supports compact surface-mount assemblies. The output-side supply range is verified as 3.0 V to 5.5 V; the input-side supply, input limits, gain, and compensation network must be confirmed before release.
推荐
Inverter Current and Voltage Monitoring
The isolation amplifier is suitable for inverter systems that need to monitor current or voltage while maintaining separation between the power electronics and low-voltage control circuitry. Its analog output allows the sensed quantity to be filtered and converted by downstream analog or mixed-signal electronics. The verified manufacturer information identifies motor phase-current and voltage sensing as target uses and confirms 5000 Vrms isolation. The design must preserve the required isolation-barrier geometry and verify input common-mode limits, output loading, bandwidth, and propagation delay, none of which are fully specified in the supplied search data.
推荐
Industrial Motor Control
The TLP7920(D4-LF1 can be used in industrial motor-control equipment where a measurement circuit must remain electrically separated from a switching power stage. Its optically isolated structure supports current feedback across the barrier, while the analog output can feed a controller or monitoring channel. The 3.0 V to 5.5 V output-side supply range is useful for common low-voltage control systems, but the input-side supply and exact electrical limits remain datasheet-dependent. PCB creepage, clearance, grounding, shielding, and thermal design should be treated as part of the functional isolation design rather than optional mechanical details.
推荐
Power-Factor Monitoring
The TLP7920(D4-LF1 may be used as the isolated sensing element in a power-factor or line-current monitoring circuit when the input network is designed around a suitable shunt and protection scheme. The analog output can be filtered and sampled to determine current magnitude or phase-related information in a power converter. The verified data confirms an analog-output isolation amplifier with 5000 Vrms isolation and a 3.0 V to 5.5 V output-side supply. It does not specify AC bandwidth, input bias behavior, or safety certification for a particular mains application, so those characteristics must be verified from Toshiba documentation before use.
推荐
Isolated Analog Measurement Interface
The TLP7920(D4-LF1 is appropriate when a low-level analog measurement must be transferred across a galvanic isolation boundary and received by separate electronics. The device provides a single differential input channel and analog output, as identified in the verified distributor records. It can be used as the front end of a measurement chain that includes filtering, biasing, and conversion to digital form. The 8-SMD package helps reduce board area, but the exact pinout, recommended application circuit, input bias current, input range, and output behavior must be taken from the Toshiba datasheet before PCB release.
推荐
推荐产品汇总
工程参考数据： TLP7920(D4-LF1 ——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 | TLP7920(D4,F | TLP7920(D4-A,F | TLP7920(D4-TP1,F | TLP7920F | TLP7920 |
|---|---|---|---|---|---|---|
| Product Type | Optically isolated analog isolation amplifier | Isolation amplifier | Isolation amplifier | Isolation amplifier | Isolation amplifier | Isolation amplifier |
| Brand | Toshiba | Toshiba | Toshiba | Toshiba | Toshiba | Toshiba |
| Package | 8-SMD | DIP-8 | 8-DIP | DIP-8 Gull Wing | 8-SMD | 8-SMD |
| Output Type | Analog | Analog output | Analog output | Analog output | Analog output | Analog output |
| Primary Application | Motor phase-current and voltage sensing | Isolation amplifier | Isolation amplifier | Isolation amplifier | Isolation amplifier | Isolation amplifier |
关键差异点
- Verified isolated analog signal transfer （对比 TLP7920(D4,F)
- Surface-mount target format （对比 TLP7920(D4,F)
- Lower listed input-bias-current value in supplied comparison data （对比 TLP7920(D4,F)
- Targeted motor-drive application positioning （对比 TLP7920(D4-A,F)
设计说明
The verified output-side supply range is 3.0 V to 5.5 V, and the typical output-side supply current is 6.2 mA. Confirm the input-side supply and all absolute maximum ratings in the Toshiba datasheet. Place the required output-side decoupling capacitors close to the device supply pins, and verify that downstream analog circuitry does not exceed the output loading and voltage limits.
Treat the isolation barrier as a constrained PCB region. Preserve the manufacturer-specified creepage and clearance distances between input-side and output-side copper, avoid placing high-voltage nets beneath the barrier, and keep surface contamination, solder residues, and conductive debris away from the isolation path. The 8-SMD package designation alone is insufficient to define the land pattern; use the official pinout and package drawing.
Do not substitute TLP7920(D4 for the target solely because the family names are similar. Verified comparison data identifies the former as through-hole and the target as SMD/SMT, and it reports different input-bias-current values. Confirm exact suffix, package, pin mapping, input range, isolation rating, and output-side supply before treating any related variant as a drop-in part.
合规信息
The manufacturer search result references EN IEC 60747-5-5 option D4, but the supplied data does not provide complete RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. Verify the current Toshiba product documentation and ordering information before regulatory qualification.
