My Inquiry
My Account
Monolithic Power Systems Inc. MCS1805GS-520-B-P
- Part No.:
- MCS1805GS-520-B-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Unclassified
- Package:
- Datasheet:
-
MCS1805GS-520-B-P.pdf
- Description:
- LINEAR HALL-EFFECT CURRENT SENSO
- Quantity:
- Payment:
- Shipping:
Inventory:1,517
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MCS1805GS-520-B-P from Monolithic Power Systems is a bidirectional linear Hall-effect current sensor IC with galvanic isolation, 5V supply, ±20A sensing range, 100 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 3 kVRMS isolation are required.
For engineers reviewing the MCS1805GS-520-B-P datasheet, MCS1805GS-520-B-P pinout, MCS1805GS-520-B-P application, or MCS1805GS-520-B-P equivalent, this device delivers ratiometric analog output, differential magnetic field rejection, ±2.5% total accuracy across –40°C to +125°C, and SOIC-8 footprint compatibility for space-constrained industrial and automotive current monitoring.
Technical Context
The MCS1805GS-520-B-P uses a differential Hall array to cancel stray magnetic fields and spinning current technique for stable offset. Its primary conductor (IP+/IP−) provides 1.2 mΩ resistance and supports up to 3000 A surge current, while isolated signal pins (VCC, VOUT, /OCD, GND) maintain 3 kVRMS dielectric strength per IEC 62368-1.
It integrates fast OCD with user-configurable threshold (100% IPMAX by default), open-drain /OCD output with 1 µs response, and ratiometric VOUT proportional to both AC/DC current and supply voltage-enabling direct ADC interfacing without external scaling in 5V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 5V nominal (4.5–5.5V operating range); enables direct integration into standard 5V control rails without LDO. |
| Current Range | ±20A bidirectional; supports full-scale measurement of reversible motor phase currents or DC bus reversal. |
| Sensitivity | 100 mV/A; yields 2.0V full-scale output at ±20A, compatible with 3.3V or 5V ADC reference voltages. |
| Total Accuracy | ±2.5% over –40°C to +125°C; includes linearity, offset, gain, and temperature drift-suitable for closed-loop motor control. |
| Isolation Rating | 3 kVRMS withstand, 580 VRMS working voltage; certified to IEC 62368-1 for reinforced insulation in mains-connected equipment. |
| OCD Response | 1 µs typical; triggers fault shutdown before power stage damage in SMPS or inverter short-circuit events. |
| Bandwidth | 120 kHz; captures fast transients in switching converters and PWM-driven loads without phase lag. |
| Package | SOIC-8 (5 mm × 4 mm); surface-mount footprint with 4.2 mm creepage/clearance for high-voltage PCB layout compliance. |
Pinout & Package
SOIC-8 package with gull-wing leads, 1.27 mm pitch, and internal primary conductor path spanning pins 1–2 (IP+) and 3–4 (IP−). Signal-side pins (5–8) are fully galvanically isolated from primary side.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 IP+ | Primary current input (+) | Fused positive terminal for main current path; low 1.2 mΩ resistance minimizes power loss and self-heating. |
| 3, 4 IP− | Primary current input (−) | Fused negative return path; differential Hall sensing between IP+ and IP− rejects common-mode magnetic interference. |
| 5 GND | Signal ground reference | Reference node for VOUT and /OCD; must be connected to controller ground, not primary-side ground. |
| 6 /OCD | Open-drain over-current flag | Active-low fault signal; requires external pull-up (10–500 kΩ) to VCC for logic-level compatibility. |
| 7 VOUT | Analog current-proportional output | Ratiometric voltage (0.1×VCC to 0.9×VCC); directly interfaces 12-bit+ ADCs without amplification or level-shifting. |
| 8 VCC | 5V supply input | Power for Hall sensors and signal conditioning; bypass with 0.1–1 µF capacitor to GND for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Differential Hall sensing | Rejects external gradient magnetic fields (e.g., adjacent inductors or busbars), enabling reliable operation in dense power modules. |
| Factory-trimmed accuracy | ±2.5% total error over temperature eliminates need for system-level calibration in production test. |
| Integrated OCD with programmable threshold | Default 100% IPMAX (±20A), configurable to 50–240% via custom order-reduces BOM count vs. discrete comparator solutions. |
| Low-noise density | 100 µA(rms)/√Hz input-referred noise; supports high-resolution current monitoring down to <100 mA RMS in 120 kHz bandwidth. |
| Small SOIC-8 footprint | 5 mm × 4 mm body with 4.2 mm creepage; saves >40% board area vs. through-hole current transformers or larger isolated amplifiers. |
Applications
| Motor Control | Switch-Mode Power Supplies |
|---|---|
Use Scenario: Real-time phase current sampling in 3-phase BLDC inverters for FOC algorithms. IC Role / Device Role / Timing Role: Isolated analog current feedback sensor with 120 kHz bandwidth and sub-µs OCD response. Use Value: Enables precise torque control and instantaneous short-circuit protection without compromising isolation integrity. |
Use Scenario: Primary-side current sensing in LLC resonant converters for peak-current-mode control. IC Role / Device Role / Timing Role: High-bandwidth, isolated current monitor replacing shunt+isolator combos. Use Value: Reduces component count by 3 parts while maintaining 3 kVRMS isolation and <4 µs total propagation delay. |
| Automotive Systems | Over-Current Fault Protection |
Use Scenario: Battery pack current monitoring in 12V/48V mild-hybrid architectures. IC Role / Device Role / Timing Role: Bidirectional isolated sensor with AEC-Q100 stress qualification (via MPS process). Use Value: Supports regenerative braking current measurement and meets automotive EMC requirements via differential sensing. |
Use Scenario: Fast trip detection in industrial PLC output modules driving solenoids or contactors. IC Role / Device Role / Timing Role: Standalone over-current detector with 1 µs response and open-drain output. Use Value: Eliminates need for external comparators and optocouplers, reducing fault latency to <2 µs end-to-end. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated linear current sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ACS724LLCB-20AU | 20A unidirectional, 200 mV/A, 2.4 kVRMS isolation, no integrated OCD | Lacks bidirectional capability and fast OCD; requires external comparator for fault detection | Select when only unidirectional sensing is needed and OCD can be implemented externally |
| TB9052FG | 20A bidirectional, 100 mV/A, 5.0 kVRMS isolation, SPI digital output, no analog VOUT | Digital interface only; requires MCU with SPI and firmware for scaling/compensation | Select when digital bus integration and higher isolation are prioritized over analog simplicity |
Compared with ACS724LLCB-20AU and TB9052FG, the MCS1805GS-520-B-P uniquely combines bidirectional analog output, integrated OCD, and 3 kVRMS isolation in a SOIC-8 package-reducing design complexity for analog-control systems requiring fast, accurate, and isolated current feedback.
Availability
MCS1805GS-520-B-P is available at Aetrix Electronics and suitable for motor control, switch-mode power supplies, and over-current fault protection requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MCS1805GS-520-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 delivers isolated current sensing for industrial and automotive power systems, emphasizing accuracy, noise immunity, and integration to replace legacy optocoupler-based solutions.
FAQ
What is the maximum continuous primary current the MCS1805GS-520-B-P can handle?
The device is rated for ±20A 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 per IEC 61000-4-5, making it suitable for high-peak industrial loads.
Does the MCS1805GS-520-B-P require external calibration for accuracy?
No. The device is factory-trimmed for sensitivity, offset, and ratiometry, delivering ±2.5% total output error over –40°C to +125°C without system-level calibration. Lifetime drift is limited to ±1% for sensitivity and total error.
How is the OCD threshold configured on the MCS1805GS-520-B-P?
The default OCD threshold is 100% of IPMAX (±20A). Custom thresholds from 50% to 240% are available via special ordering (e.g., MCS1805GS-520-B-P with suffix DDD = 150 for 150% IPMAX); no external components or configuration pins are required.
Can the MCS1805GS-520-B-P operate with a 3.3V supply?
No. The "5" in MCS1805GS-520-B-P denotes 5V supply operation. For 3.3V systems, use the MCS1805GS-320-B variant (±20A, 66 mV/A, 3.3V supply). Mixing supply voltages invalidates specifications and may damage the device.
What is the recommended bypass capacitor for VCC?
A ceramic capacitor of 0.1 µF to 1 µF must be placed between VCC (pin 8) and GND (pin 5), as close as possible to the device. This suppresses high-frequency noise from the primary current path and ensures stable Hall sensor biasing.
Is the SOIC-8 package of the MCS1805GS-520-B-P lead-free and RoHS compliant?
Yes. All MPS parts, including MCS1805GS-520-B-P, are lead-free, halogen-free, and fully compliant with the EU RoHS directive. The top marking includes MPSYWW date code and lot traceability per JEDEC standards.
How does the differential Hall array improve noise immunity?
The integrated dual Hall transducers measure magnetic field difference between two points along the primary conductor. This topology inherently cancels uniform external magnetic fields (e.g., from nearby chokes), achieving immunity to gradient fields that would otherwise corrupt single-point Hall measurements.
MCS1805GS-520-B-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- *
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
MCS1805GS-520-B-P FAQ
1.How can I place an order for MCS1805GS-520-B-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MCS1805GS-520-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-520-B-P reliable?
The price and inventory of MCS1805GS-520-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-520-B-P is usually 5 days.
3.What payment methods are accepted for MCS1805GS-520-B-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCS1805GS-520-B-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCS1805GS-520-B-P?
MCS1805GS-520-B-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCS1805GS-520-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-520-B-P?
For technical support, including MCS1805GS-520-B-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCS1805GS-520-B-P requirements.
6.How does Aetrix verify that MCS1805GS-520-B-P is sourced from the original manufacturer or authorized distributors?
All MCS1805GS-520-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-520-B-P meets industry standards.
7.What is the process for return or replacement of MCS1805GS-520-B-P?
All MCS1805GS-520-B-P units undergo pre-shipment inspection (PSI). If there is an issue with MCS1805GS-520-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-520-B-P part is unused and in its original packaging.
Return procedure for MCS1805GS-520-B-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCS1805GS-520-B-P Tags
-
936106-1
TE Connectivity AMP Connectors
-
2050030-1
TE Connectivity AMP Connectors
-
1897255-2
TE Connectivity AMP Connectors
-
368811-1
TE Connectivity AMP Connectors
-
2296205-6
TE Connectivity AMP Connectors
-
2232228-1
TE Connectivity AMP Connectors
-
2296207-6
TE Connectivity AMP Connectors
-
2296206-8
TE Connectivity AMP Connectors
-
2316671-2
TE Connectivity AMP Connectors
-
2316671-4
TE Connectivity AMP Connectors
-
2316671-1
TE Connectivity AMP Connectors
-
174463-3
TE Connectivity AMP Connectors
Tech Hub
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
