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Monolithic Power Systems Inc. MP6531AGF-Z
- Part No.:
- MP6531AGF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Motor Drivers, Controllers
- Package:
- 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MP6531AGF-Z.pdf
- Description:
- 5V - 60V, THREE-PHASE, BRUSHLESS
- Quantity:
- Payment:
- Shipping:
Inventory:2,345
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Product details
Overview
MP6531AGF-Z from Monolithic Power Systems is a three-phase BLDC motor pre-driver IC designed to control six external N-channel MOSFETs in half-bridge configurations. It operates from 5V to 60V input, delivers 0.8A source / 1A sink gate drive per high-side output, and integrates bootstrap charge-pump support for 100% duty-cycle operation. Used in e-bike controllers and power tools where compact, thermally robust motor control is required.
For engineers reviewing the MP6531AGF-Z datasheet, MP6531AGF-Z pinout, MP6531AGF-Z application, or MP6531AGF-Z equivalent, key selection criteria include its 5–60V operating range, programmable over-current protection via LSS/OCREF, adjustable dead-time control (0.13–5.7 µs), thermal shutdown at 190°C, and TSSOP-28 EP package with exposed thermal pad.
Technical Context
The MP6531AGF-Z implements a three-phase gate driver architecture with independent high-side (GHA/GHB/GHC) and low-side (GLA/GLB/GLC) outputs, each driven by internal logic that enforces programmable dead time to prevent shoot-through. Its bootstrap-based high-side supply uses an integrated trickle-charge circuit to sustain gate voltage during continuous conduction.
Protection is implemented via dual-path current sensing: VDS-based short-circuit detection referenced to OCREF (0.125–2.4V threshold), and low-side shunt-based OCP triggered at 0.5V on LSS. Faults trigger latched shutdown with open-drain nFAULT assertion and require reset via nSLEEP or VIN UVLO recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input voltage range | 5V to 60V - supports wide-range battery inputs including 24V/48V e-bike and power tool systems. |
| Gate drive capability | 0.8A source / 1A sink (HS), 2A sink (LS) - enables fast switching of medium-RDS(on) MOSFETs up to 60V. |
| Dead time range | 130ns to 5.7µs - set externally via RDT; prevents shoot-through across all three phases simultaneously. |
| OCP threshold | 0.5V on LSS pin - corresponds to precise current limit (e.g., 10A with 50mΩ sense resistor). |
| Thermal shutdown | 190°C junction temperature - latched fault response protects against sustained overload or poor heatsinking. |
| Quiescent current | 1µA in sleep mode (nSLEEP = low) - extends battery life in portable BLDC applications. |
| VREG output | 10–13V regulated - powers low-side drivers and bootstrap circuits even at 5V input. |
| UVLO thresholds | VIN rise: 3.9V ±0.6V; VREG rise: 7.8V ±0.7V - ensures stable startup and rail integrity monitoring. |
Pinout & Package
TSSOP-28 EP (9.7mm × 6.4mm) with exposed thermal pad - optimized for surface-mount thermal management in motor control PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Main power input | Bypassed with ceramic capacitor; supplies all internal circuitry and charge pump. |
| CPA/CPB (Pins 2–3) | Charge pump flying capacitor terminals | Connect 470nF X7R ceramic; generates VREG from VIN for gate drive supply. |
| VREG (Pin 4) | Regulated gate drive supply | 10–13V output; bypassed with 10µF X7R; powers LS drivers and bootstrap circuits. |
| BSTA–BSTC (Pins 5,9,13) | Bootstrap capacitor connections | Each connects to respective SHA/SHB/SHC; charged via internal trickle pump for 100% duty cycle. |
| GHA–GHC (Pins 7,11,15) | High-side gate drive outputs | 0.8A source / 1A sink; drive gates of external N-MOSFETs in upper half-bridge legs. |
| GLA–GLC (Pins 8,12,16) | Low-side gate drive outputs | 2A sink capability; drive gates of lower N-MOSFETs; enable synchronous rectification. |
| LSS (Pin 17) | Low-side current sense input | Monitors shunt voltage; triggers OCP when >0.5V - enables precise motor stall/current limiting. |
| nFAULT (Pin 24) | Fault indicator output | Open-drain, active-low; asserts during OCP, SCP, UVLO, or thermal shutdown. |
| nSLEEP (Pin 25) | Sleep mode control | Logic-high enables operation; internal pull-down allows default disable on power-up. |
| OCREF (Pin 26) | VDS-based short-circuit reference | External voltage sets VDS trip point (0.125–2.4V); disables SCP/OCP when tied to VREG via 100kΩ. |
| DT (Pin 27) | Dead time adjustment | Resistor to GND sets tDEAD = 70 × RDT (kΩ) ns - fine-tunes shoot-through margin per design needs. |
Key Features
| Feature | Design Value |
|---|---|
| Bootstrap trickle-charge circuit | Maintains high-side gate voltage during 100% duty cycle - eliminates need for external charge pumps or complex layout. |
| Programmable over-current protection | Dual-mode: LSS shunt sensing (0.5V threshold) + OCREF-referenced VDS monitoring - configurable for motor stall or MOSFET short detection. |
| Adjustable dead-time control | Single external resistor (DT pin) sets identical dead time across all three phases - simplifies timing alignment and reduces layout risk. |
| Low-power sleep mode | 1µA quiescent current with full functional disable - critical for battery-powered tools requiring standby longevity. |
| Integrated fault reporting | Open-drain nFAULT pin signals all faults (OCP, SCP, UVLO, thermal) with latched behavior - enables system-level error handling without polling. |
| Thermally enhanced TSSOP-EP | θJA = 32°C/W, θJC = 6°C/W - supports >3.9W continuous dissipation at 25°C ambient; exposed pad improves PCB heat transfer. |
Applications
| Power Tools | E-Bike Motor Controllers |
|---|---|
|
Use Scenario: Cordless impact driver with variable-speed trigger and electronic braking. IC Role / Device Role / Timing Role: Pre-driver controlling six discrete 60V N-MOSFETs in three-phase inverter stage; manages PWM timing, dead time, and phase commutation logic from MCU. Use Value: Enables compact, high-efficiency motor drive with integrated OCP and thermal protection - reduces BOM count versus discrete gate driver + protection IC solutions. |
Use Scenario: Mid-drive e-bike controller supporting 36V/48V battery packs and regenerative braking. IC Role / Device Role / Timing Role: Gate driver for external MOSFET half-bridges; provides bootstrap voltage regulation, shoot-through prevention, and fault signaling to main controller. Use Value: Supports 100% duty cycle during hill-climb hold; trickle-charge maintains gate voltage without auxiliary supply - improves torque consistency and system reliability. |
| Industrial BLDC Pumps | Automated Door Actuators |
|
Use Scenario: HVAC circulation pump requiring quiet, variable-speed operation and stall detection. IC Role / Device Role / Timing Role: Three-phase pre-driver interfacing with position sensor feedback and MCU; executes commutation sequencing and current limiting. Use Value: LSS-based OCP detects mechanical jamming at <0.5V sense drop; nFAULT alerts MCU to halt operation before motor or MOSFET damage occurs. |
Use Scenario: Garage door opener with soft-start, obstacle detection, and bidirectional motion control. IC Role / Device Role / Timing Role: Motor driver pre-driver managing direction, speed, and torque via PWM inputs; monitors current to detect obstruction-induced stall. Use Value: Adjustable dead time (via DT resistor) accommodates varied MOSFET switching speeds; sleep mode cuts standby power to <1µA - meets energy certification requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar three-phase BLDC pre-driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP6532AGR-Z | QFN-28 (4mm×4mm) package; identical electrical specs but smaller footprint and higher θJA (42°C/W). | Better suited for space-constrained designs; requires more aggressive PCB thermal design due to reduced thermal mass. | Select when board area is critical and thermal vias under exposed pad are feasible. |
| DRV8305PWP | Texas Instruments part; integrates current-sense amplifiers and SPI interface; wider 4.4–65V VIN range. | Offers digital configuration and diagnostics; lacks trickle-charge for true 100% duty cycle - requires external bootstrap assist for continuous conduction. | Choose when system-level telemetry, programmability, or tighter current measurement resolution are prioritized over analog simplicity and duty-cycle headroom. |
Compared with MP6531AGF-Z, MP6532AGR-Z trades thermal performance for miniaturization, while DRV8305PWP adds configurability at the cost of analog gate drive robustness and 100% duty-cycle support - making MP6531AGF-Z optimal for cost-sensitive, thermally demanding, or analog-control-focused BLDC systems.
Availability
MP6531AGF-Z is available at Aetrix Electronics and suitable for power tools, e-bike motor controllers, and industrial BLDC pumps requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MP6531AGF-Z 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 analog and power ICs, with core expertise in DC/DC conversion, motor control, and LED drivers.
The MP6531A product line targets cost-effective, thermally robust three-phase BLDC pre-driver solutions for battery-powered and industrial motor applications - emphasizing integration, protection, and ease of layout.
FAQ
What is the maximum continuous input voltage the MP6531AGF-Z can withstand?
The MP6531AGF-Z has an absolute maximum VIN rating of 65V, but its recommended operating range is strictly +5V to +60V. Operation above 60V-even transiently-risks permanent damage due to internal clamp limitations and exceeds guaranteed functional specifications per the datasheet Rev. 1.03.
How does the trickle-charge circuit enable 100% duty cycle operation?
The trickle-charge circuit injects ~5µA into each bootstrap capacitor during high-side conduction, compensating for leakage losses that would otherwise discharge the capacitor. This sustains sufficient gate voltage (≥10V) on GHA/GHB/GHC even when the corresponding low-side FET remains off indefinitely - enabling true 100% duty cycle without external charge pumps.
Can the MP6531AGF-Z drive both high-side and low-side MOSFETs directly without external level shifters?
Yes - the MP6531AGF-Z integrates bootstrap-based high-side drivers and direct low-side drivers. It accepts standard 3.3V/5V logic inputs (HA/HB/HC/LA/LB/LC) and outputs gate voltages referenced to SHA/SHB/SHC (high-side) and GND (low-side), eliminating need for external level-shifting circuitry in standard N-MOSFET half-bridge configurations.
What happens during an over-current event, and how is it cleared?
When LSS voltage exceeds 0.5V or VDS sensing exceeds OCREF, the MP6531AGF-Z enters a latched fault state: all gate outputs disable, nFAULT pulls low, and internal logic halts. Recovery requires either cycling nSLEEP (drive low then high) or dropping VIN below UVLO threshold and reapplying power - no automatic reset is provided.
Is the TSSOP-28 EP package lead-free and RoHS-compliant?
Yes - all MP6531A variants, including MP6531AGF-Z, are lead-free, halogen-free, and fully compliant with the EU RoHS directive. The exposed thermal pad is solderable and intended for direct connection to PCB ground planes to enhance thermal performance and EMI shielding.
How is dead time adjusted, and what is the minimum achievable value?
Dead time is set by connecting a resistor between DT pin and GND. Using Equation tDEAD(ns) = 70 × RDT(kΩ), a 1.86kΩ resistor yields ~130ns - the device's minimum dead time. If DT is shorted to GND, this 130ns internal minimum is enforced, providing shoot-through protection even without external components.
Does the MP6531AGF-Z include built-in current-sense amplifiers?
No - the MP6531AGF-Z does not integrate current-sense amplifiers. It provides raw sensing interfaces: LSS accepts low-side shunt voltage (0–0.6V), and OCREF accepts external reference for VDS-based short-circuit detection. Signal conditioning and amplification must be implemented externally if analog current readback is required.
MP6531AGF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- *
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- -
- Motor Type - AC, DC:
- -
- Function:
- -
- Output Configuration:
- -
- Interface:
- -
- Technology:
- -
- Step Resolution:
- -
- Applications:
- -
- Current - Output:
- -
- Voltage - Supply:
- -
- Voltage - Load:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSSOP-EP
MP6531AGF-Z FAQ
1.How can I place an order for MP6531AGF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP6531AGF-Z 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 MP6531AGF-Z reliable?
The price and inventory of MP6531AGF-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP6531AGF-Z is usually 5 days.
3.What payment methods are accepted for MP6531AGF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP6531AGF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP6531AGF-Z?
MP6531AGF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP6531AGF-Z 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 MP6531AGF-Z?
For technical support, including MP6531AGF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP6531AGF-Z requirements.
6.How does Aetrix verify that MP6531AGF-Z is sourced from the original manufacturer or authorized distributors?
All MP6531AGF-Z 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 MP6531AGF-Z meets industry standards.
7.What is the process for return or replacement of MP6531AGF-Z?
All MP6531AGF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP6531AGF-Z, 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 MP6531AGF-Z part is unused and in its original packaging.
Return procedure for MP6531AGF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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