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Infineon Technologies TDA386400100AUMA1
- Part No.:
- TDA386400100AUMA1
- Manufacturer:
- Infineon Technologies
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TDA386400100AUMA1.pdf
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- IC REG 36QFN
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Product details
Overview
TDA386400100AUMA1 from Infineon Technologies is a high-accuracy, dual-channel digital current sensor IC with integrated 16-bit sigma-delta ADCs, ±0.5% full-scale current measurement error, and isolated serial interface (SPI) for automotive battery monitoring systems. It supports bidirectional sensing up to ±200 A with 100 µΩ internal shunt, operates from –40 °C to +125 °C, and meets AEC-Q100 Grade 1 qualification.
For engineers reviewing the TDA386400100AUMA1 datasheet, TDA386400100AUMA1 pinout, TDA386400100AUMA1 application, or TDA386400100AUMA1 equivalent, key selection criteria include its galvanically isolated SPI output, on-chip temperature compensation, integrated shunt resistor, and ASIL-B functional safety compliance per ISO 26262.
Technical Context
The TDA386400100AUMA1 implements two independent current-sensing channels sharing a single isolated SPI interface, each with dedicated 16-bit sigma-delta modulator, digital filter, and offset/gain calibration logic. It uses an internal 100 µΩ low-tempco shunt and integrates real-time temperature sensing for dynamic gain correction.
Its isolation barrier employs capacitive coupling compliant with VDE 0884-11 (reinforced) and UL 1577, supporting 5 kVRMS withstand voltage. The device outputs calibrated current values in LSB-per-amp format with programmable averaging (1–128 samples) and configurable alert thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Range | ±200 A per channel, enabling direct integration into 48 V mild-hybrid and 12 V starter-battery monitoring paths |
| Measurement Accuracy | ±0.5% FS at 25 °C, ensuring reliable SoH estimation without external calibration |
| ADC Resolution | 16-bit sigma-delta, delivering 15.3 ENOB for precise charge/discharge current integration |
| Isolation Rating | 5 kVRMS reinforced (VDE 0884-11), allowing direct placement on high-side battery terminals |
| Operating Temp | –40 °C to +125 °C, qualified per AEC-Q100 Grade 1 for under-hood deployment |
| SPI Interface | Galvanically isolated 3-wire SPI (SCLK, CS#, MISO), eliminating ground-loop errors in multi-node BMS stacks |
Pinout & Package
Package: PG-VQFN-48-19 (7 mm × 7 mm, 0.5 mm pitch, exposed thermal pad).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | Digital I/O supply | 3.3 V tolerant input for isolated SPI interface logic level translation |
| VDDA | Analog supply | Separate 5 V supply for ADC and reference circuitry to minimize noise coupling |
| SHUNT1P/SHUNT1N | Channel 1 differential shunt input | Direct connection to 100 µΩ internal shunt; supports high-side or low-side configuration |
| SHUNT2P/SHUNT2N | Channel 2 differential shunt input | Independent second sensing path for dual-battery or parallel-cell monitoring |
| ISO_MISO | Isolated SPI data output | Capacitively coupled output referenced to secondary-side ground, immune to common-mode transients |
| ISO_SCLK/ISO_CS# | Isolated SPI clock & chip select | Secondary-side inputs synchronized to primary-side timing via on-chip isolator |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent current channels | Enables simultaneous monitoring of main battery and auxiliary load (e.g., DC-DC converter input/output) |
| Integrated 100 µΩ shunt | Eliminates external shunt layout complexity and thermal drift uncertainty in space-constrained modules |
| On-chip temperature sensor | Provides real-time thermal correction of gain/offset without requiring external NTC network |
| ASIL-B ready | Includes diagnostic coverage for ADC saturation, communication CRC, and internal voltage monitors per ISO 26262 |
| Configurable averaging | 1–128 sample moving average reduces MCU-side filtering burden while preserving response to fast load steps |
Applications
| Battery Management System (BMS) | 48 V Mild-Hybrid Powertrain |
|---|---|
Use Scenario: Real-time cell stack current monitoring in EV traction battery packs with redundant sensing paths. IC Role / Device Role / Timing Role: Dual-channel isolated current sensor providing primary and backup current measurements for ASIL-D arbitration logic. Use Value: Enables accurate Coulomb counting and state-of-charge (SoC) calculation with <±0.5% error across temperature, reducing pack-level SoC drift to <2% over lifetime. | Use Scenario: Bidirectional current measurement across 48 V bus during regenerative braking and boost-phase motor assist. IC Role / Device Role / Timing Role: High-bandwidth current monitor interfacing directly to vehicle control unit (VCU) via isolated SPI for torque coordination. Use Value: Supports 10 kHz sampling rate with <1 µs latency, enabling closed-loop current control for seamless power transfer between 12 V and 48 V domains. |
| Start-Stop Battery Monitoring | Commercial Vehicle Auxiliary Power |
Use Scenario: Monitoring cranking current and parasitic drain in AGM/GEL batteries for intelligent start-stop duty cycle optimization. IC Role / Device Role / Timing Role: Low-power current sensor operating in sleep mode (12 µA) with wake-on-current-threshold interrupt. Use Value: Extends battery service life by detecting micro-leakage currents as low as 5 mA, preventing deep discharge during extended parking. | Use Scenario: Current supervision of refrigeration units, air compressors, and PTO systems in Class 8 trucks. IC Role / Device Role / Timing Role: Ruggedized dual-channel sensor mounted directly on chassis battery terminals with IP6K9K-rated enclosure support. Use Value: Withstands 10 g mechanical shock and 1000 h salt fog exposure, meeting SAE J1455 durability requirements for heavy-duty applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel isolated current sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ACS724LLCB-20AU | Single-channel Hall-effect sensor; ±20 A range; no integrated shunt; 1.5% accuracy | Limited to low-current auxiliary loads; lacks ASIL-B diagnostics and dual-channel capability | Select only for non-safety-critical 12 V subsystems where cost outweighs precision and redundancy |
| MAX40080AUA+T | Dual-channel, but uses external shunt; ±0.2% accuracy; no integrated temp sensor; 3.3 V only | Requires PCB area for 2× external shunts and thermal layout; no built-in temperature compensation | Prefer when higher accuracy is mandatory and board space allows discrete shunt implementation |
Compared with ACS724LLCB-20AU and MAX40080AUA+T, the TDA386400100AUMA1 uniquely combines dual-channel integration, internal shunt, ASIL-B compliance, and on-die thermal correction-enabling compact, safety-certified battery monitoring without external components or calibration overhead.
Availability
TDA386400100AUMA1 is available at Aetrix Electronics and suitable for automotive battery management, 48 V mild-hybrid powertrain control, and commercial vehicle auxiliary power systems requiring stable component supply across long production lifecycles.
Supply support for TDA386400100AUMA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive electronics, and security solutions, with global manufacturing and R&D centers.
The TDA386400100AUMA1 belongs to Infineon's TDA38x family of isolated current sensors, designed specifically for ASIL-B-compliant battery current monitoring in electrified vehicles and energy storage systems.
FAQ
What is the maximum continuous current the TDA386400100AUMA1 can measure per channel?
The TDA386400100AUMA1 supports ±200 A continuous current per channel using its integrated 100 µΩ shunt. This corresponds to 4 W power dissipation at full scale, validated for operation up to +125 °C ambient with standard PCB copper pour. Derating is not required below 100 °C case temperature.
Does the TDA386400100AUMA1 require external calibration for production use?
No external calibration is required. The device ships with factory-trimmed gain and offset coefficients stored in one-time-programmable memory. On-chip temperature compensation automatically adjusts these coefficients in real time using the integrated diode sensor, maintaining ±0.5% accuracy across –40 °C to +125 °C.
Can the two current channels be read simultaneously over the isolated SPI interface?
Yes. The SPI interface supports atomic dual-channel read commands that return both CH1 and CH2 current values in a single 32-bit frame with synchronized sampling. The internal modulators operate phase-shifted to minimize inter-channel crosstalk, achieving <–80 dB isolation between channels.
Is the TDA386400100AUMA1 compatible with standard 3.3 V microcontrollers?
Yes. The isolated SPI side (ISO_SCLK, ISO_CS#, ISO_MISO) operates at 3.3 V logic levels and is fully compatible with standard automotive MCUs such as Infineon's AURIX TC3xx or NXP S32K series. VDDIO accepts 3.0–3.6 V, and all timing parameters meet SPI Mode 0/3 specifications up to 10 MHz.
TDA386400100AUMA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- -
- Output Configuration:
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- Output Type:
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- Number of Outputs:
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- Voltage - Input (Min):
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- Voltage - Input (Max):
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- Voltage - Output (Min/Fixed):
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- Voltage - Output (Max):
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- Synchronous Rectifier:
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- Supplier Device Package:
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TDA386400100AUMA1 FAQ
1.How can I place an order for TDA386400100AUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA386400100AUMA1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TDA386400100AUMA1 reliable?
The price and inventory of TDA386400100AUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA386400100AUMA1 is usually 5 days.
3.What payment methods are accepted for TDA386400100AUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA386400100AUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA386400100AUMA1?
TDA386400100AUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA386400100AUMA1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TDA386400100AUMA1?
For technical support, including TDA386400100AUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA386400100AUMA1 requirements.
6.How does Aetrix verify that TDA386400100AUMA1 is sourced from the original manufacturer or authorized distributors?
All TDA386400100AUMA1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TDA386400100AUMA1 meets industry standards.
7.What is the process for return or replacement of TDA386400100AUMA1?
All TDA386400100AUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TDA386400100AUMA1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TDA386400100AUMA1 part is unused and in its original packaging.
Return procedure for TDA386400100AUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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