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Monolithic Power Systems Inc. MCS1805GS-310-B-P
- Part No.:
- MCS1805GS-310-B-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Unclassified
- Package:
- Datasheet:
-
MCS1805GS-310-B-P.pdf
- Description:
- LINEAR HALL-EFFECT CURRENT SENSO
- Quantity:
- Payment:
- Shipping:
Inventory:1,290
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Product details
Overview
MCS1805GS-310-B-P from Monolithic Power Systems is a bidirectional linear Hall-effect current sensor IC with galvanic isolation, 3.3V supply, ±10A sensing range, 132 mV/A sensitivity, and integrated over-current detection (OCD) with 1 µs response time. It replaces optoisolators in motor control and power supply feedback loops where high accuracy, noise immunity, and compact SOIC-8 packaging are required.
For engineers reviewing the MCS1805GS-310-B-P datasheet, MCS1805GS-310-B-P pinout, MCS1805GS-310-B-P application, or MCS1805GS-310-B-P equivalent, this page delivers verified technical context, isolation-rated performance metrics, OCD threshold configuration, and real-world use cases for industrial and automotive current monitoring.
Technical Context
The device uses a differential Hall array to cancel stray magnetic fields and employs spinning current technique for ultra-low offset drift. Its primary conductor (IP+/IP−) provides 1.2 mΩ resistance and supports up to 3000 A surge current, while signal-side pins (VCC, VOUT, /OCD, GND) are galvanically isolated at 3 kVRMS with 580 VRMS working voltage per IEC 62368-1.
It delivers ratiometric analog output (VOUT proportional to both current and VCC), supports custom OCD thresholds from 50% to 240% of IPMAX, and achieves ±2.5% total output error across −40°C to +125°C junction temperature range with 120 kHz bandwidth.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.3 V ±10% - powers internal Hall sensors and signal chain; UVLO triggers below 2.5 V to prevent erroneous output. |
| Current Range | ±10 A bidirectional - enables precise AC/DC measurement in H-bridge motor drivers and bidirectional DC-DC converters. |
| Sensitivity | 132 mV/A - yields 1.32 V full-scale output at ±10 A, compatible with 3.3 V ADC reference without gain staging. |
| Isolation Rating | 3 kVRMS withstand, 580 VRMS working voltage - meets reinforced isolation requirements for mains-connected systems per IEC 62368-1. |
| OCD Response | 1 µs - detects over-current faults faster than typical PWM switching cycles, enabling cycle-by-cycle protection. |
| Total Accuracy | ±2.5% - includes sensitivity error, offset drift, and nonlinearity across full temperature range, enabling closed-loop control without calibration. |
| Bandwidth | 120 kHz - captures fast transients in SiC/GaN-based power stages and servo motor current waveforms. |
Pinout & Package
SOIC-8 package (5 mm × 4 mm, 1.5 mm height) with creepage/clearance ≥4.2 mm between primary (IP+, IP−) and signal-side pins (VCC, VOUT, /OCD, GND). Primary conductors occupy pins 1–2 (IP+) and 3–4 (IP−); signal pins are arranged on opposite side for PCB layout separation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 IP+ | Primary current input (+) | Fused internal connection to high-side current path; low 1.2 mΩ resistance minimizes power loss and thermal rise. |
| 3, 4 IP− | Primary current return (−) | Fused internal connection to low-side return path; differential sensing rejects common-mode field interference. |
| 5 GND | Signal ground reference | Reference node for VOUT and /OCD; must be connected to system signal ground, not power ground. |
| 6 /OCD | Open-drain over-current flag | Active-low output; requires external pull-up (10–500 kΩ) to VCC; asserts within 1 µs of current exceeding programmed threshold. |
| 7 VOUT | Analog current-proportional output | Ratiometric voltage (0.1×VCC to 0.9×VCC); drives 4.7 kΩ load with ≤35 mA RMS input-referred noise. |
| 8 VCC | 3.3 V supply input | Requires 0.1–1 µF bypass capacitor to GND; under-voltage lockout prevents operation below 2.5 V. |
Key Features
| Feature | Design Value |
|---|---|
| Differential Hall sensing | Rejects external gradient magnetic fields via dual-point measurement, enabling reliable operation near transformers or busbars. |
| Factory-trimmed accuracy | ±2.5% total error over temperature eliminates need for end-of-line calibration in production test. |
| Integrated OCD with programmable threshold | Customizable from 50% to 240% of ±10 A range (i.e., ±5 A to ±24 A), configured at factory via part number suffix. |
| Low-noise density | 100 µA(rms)/√Hz input-referred noise enables high-resolution current measurement in precision motor control. |
| Galvanic isolation | 3 kVRMS dielectric strength allows direct replacement of optocouplers in safety-critical feedback paths without external isolation components. |
Applications
| Motor Control | Automotive Systems |
|---|---|
Use Scenario: Real-time phase current sensing in 3-phase BLDC inverters for electric power steering (EPS) and HVAC compressors. IC Role / Device Role / Timing Role: Bidirectional current monitor feeding ADC inputs for field-oriented control (FOC) and instantaneous torque regulation. Use Value: 120 kHz bandwidth captures PWM ripple; ±2.5% accuracy ensures consistent torque delivery across −40°C to +125°C ambient. | Use Scenario: Battery pack current monitoring in 12 V/48 V mild-hybrid architectures with over-current fault logging. IC Role / Device Role / Timing Role: Isolated shunt replacement providing galvanically separated current data to battery management system (BMS) controller. Use Value: 3 kVRMS isolation meets automotive functional safety requirements; 1 µs OCD response enables immediate contactor disengagement during short-circuit events. |
| Switch-Mode Power Supplies | Over-Current Fault Protection |
Use Scenario: Secondary-side current sensing in isolated LLC resonant converters for server PSUs and telecom rectifiers. IC Role / Device Role / Timing Role: High-bandwidth current feedback element for adaptive dead-time control and peak-current limiting. Use Value: Ratiometric VOUT maintains loop stability across input line variations; 580 VRMS working voltage supports 400 VDC bus designs. | Use Scenario: Fast over-current detection in industrial PLC output modules driving solenoids, valves, and actuators. IC Role / Device Role / Timing Role: Standalone OCD trigger interfacing directly with microcontroller GPIO or hardware shutdown circuitry. Use Value: Dedicated /OCD pin with 1 µs latency enables sub-microsecond fault response-faster than software-based monitoring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated current sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ACS724LLCTR-10AU-T | 5 V supply, ±10 A, 200 mV/A, no integrated OCD, 2.5 kVRMS isolation | Lacks dedicated /OCD output; requires external comparator for over-current detection | Select when OCD is implemented externally and 5 V supply is preferred. |
| TMC1100A-10A | 3.3 V supply, ±10 A, 132 mV/A, integrated OCD, 2.5 kVRMS isolation, SPI interface | Provides digital output and diagnostics via SPI; lower isolation rating limits use in higher-voltage systems | Select when digital communication and fault reporting are needed, and isolation requirement is ≤2.5 kVRMS. |
Compared with ACS724LLCTR-10AU-T, MCS1805GS-310-B-P offers faster OCD response and higher isolation; versus TMC1100A-10A, it provides superior isolation margin and simpler analog interface but lacks digital configurability.
Availability
MCS1805GS-310-B-P is available at Aetrix Electronics and suitable for motor control, automotive battery monitoring, and isolated SMPS requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MCS1805GS-310-B-P 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
Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance power management ICs, including DC-DC converters, LED drivers, and precision analog sensors.
The MCS1805 product line targets isolated current sensing in space-constrained, high-reliability applications such as EV subsystems, industrial automation, and renewable energy inverters-designed to replace optocouplers and discrete shunt+amplifier solutions.
FAQ
What is the maximum continuous primary current the MCS1805GS-310-B-P can handle?
The device is rated for ±10 A continuous bidirectional current, with a primary conductor resistance of 1.2 mΩ. It supports transient surges up to 3000 A (8 µs/20 µs pulse) and 200 A for 10 ms, making it suitable for high-peak applications like motor startup and inrush limiting.
How is the OCD threshold set for the MCS1805GS-310-B-P?
The OCD threshold is factory-programmed and fixed per part number. For MCS1805GS-310-B-P, the threshold is ±10 A (100% of IPMAX). Other variants (e.g., -315-B) offer 150% IPMAX (±15 A); custom thresholds require contacting MPS FAE prior to ordering.
Does the MCS1805GS-310-B-P require external calibration?
No. The device is factory-trimmed for sensitivity, offset, and ratiometry, achieving ±2.5% total output error over −40°C to +125°C without user calibration. Offset drift is limited to ±10 mV across temperature, and lifetime drift is ±1% for sensitivity and total error.
Can the /OCD pin drive an LED directly?
No. The /OCD pin is open-drain with a maximum sink current of 20 mA and a low-voltage specification of 0.3 V at 10 kΩ pull-up. To drive an LED, add a series resistor (e.g., 1 kΩ) between VCC and the LED anode, and connect the cathode to /OCD-ensuring current remains within safe limits.
What is the recommended PCB layout for minimizing magnetic coupling errors?
Route high-current traces (IP+/IP−) straight and symmetrically through the device, avoiding bends or vias near the package. Keep signal traces (VOUT, /OCD) >5 mm away from power planes and magnetic components. Use separate ground planes for primary and secondary sides, connected only at a single point near GND pin 5.
Is the MCS1805GS-310-B-P compliant with AEC-Q200?
No. While rated for −40°C to +125°C junction temperature and qualified to JEDEC standards, it is not AEC-Q200 stress-tested. For automotive-grade qualification, consult MPS for designated AEC-Q200 variants or consider the pin-compatible MCS1805GS-310-B-AQ if available.
What is the minimum bypass capacitance required on VCC?
A minimum 0.1 µF ceramic capacitor (X7R, 0603 or larger) is required between VCC (pin 8) and GND (pin 5), placed within 2 mm of the pins. For noisy environments, add a parallel 1 µF capacitor to suppress broadband supply ripple affecting offset stability.
MCS1805GS-310-B-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- *
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
MCS1805GS-310-B-P FAQ
1.How can I place an order for MCS1805GS-310-B-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MCS1805GS-310-B-P 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 MCS1805GS-310-B-P reliable?
The price and inventory of MCS1805GS-310-B-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCS1805GS-310-B-P is usually 5 days.
3.What payment methods are accepted for MCS1805GS-310-B-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCS1805GS-310-B-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCS1805GS-310-B-P?
MCS1805GS-310-B-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCS1805GS-310-B-P 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 MCS1805GS-310-B-P?
For technical support, including MCS1805GS-310-B-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCS1805GS-310-B-P requirements.
6.How does Aetrix verify that MCS1805GS-310-B-P is sourced from the original manufacturer or authorized distributors?
All MCS1805GS-310-B-P 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 MCS1805GS-310-B-P meets industry standards.
7.What is the process for return or replacement of MCS1805GS-310-B-P?
All MCS1805GS-310-B-P units undergo pre-shipment inspection (PSI). If there is an issue with MCS1805GS-310-B-P, 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 MCS1805GS-310-B-P part is unused and in its original packaging.
Return procedure for MCS1805GS-310-B-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCS1805GS-310-B-P Tags
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936106-1
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2050030-1
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