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Monolithic Power Systems Inc. MP6545GV-Z
- Part No.:
- MP6545GV-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Motor Drivers, Controllers
- Package:
- 28-VFQFN Exposed Pad
- Datasheet:
-
MP6545GV-Z.pdf
- Description:
- 45V, 2.5A, SIMPLE THREE-PHASE PO
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MP6545GV-Z from Monolithic Power Systems is a three-phase half-bridge power stage IC designed for brushless DC motor drive applications. It integrates six N-channel MOSFETs (three high-side, three low-side), operates from 4.5V to 45V input, delivers up to 2.5A per phase, features 150mΩ typical RDS(ON) per FET, and includes OCP, OVP, UVLO, and thermal shutdown with open-drain nFAULT reporting. Used in compact BLDC motor control stages where space-constrained PCB layout and integrated protection are critical.
For engineers reviewing the MP6545GV-Z datasheet, MP6545GV-Z pinout, MP6545GV-Z application, or MP6545GV-Z equivalent, this page provides verified technical context, validated pin functions, confirmed package mapping to QFN-28 (4mm×5mm), real-world timing characteristics (e.g., 40–360ns gate delays, 80ns dead time), and application-specific design meaning for each parameter - all extracted directly from the official MP6545 Rev. 1.1 datasheet.
Technical Context
The MP6545GV-Z implements independent three-channel half-bridge drive logic with separate HSx/LSx inputs per phase, enabling direct microcontroller PWM control without external logic. Its internal charge pump (VCP) generates >VIN+5V for high-side gate drive, while VREG supplies 5V for low-side drivers - both requiring external X7R ceramic capacitors (1µF @ 16V for VREG/VCP, 100nF between CPA/CPB).
Protection is hardware-based and latched: over-current triggers at 3–4.5A (sinking/sourcing), OVP activates at 45–48V, UVLO releases at 4.5V with 300mV hysteresis, and thermal shutdown engages at 165°C with 15°C hysteresis. Faults assert open-drain nFAULT low and disable all outputs until nRESET is pulsed or power cycled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4.5V to 45V - supports wide-input industrial and automotive battery-supplied BLDC systems without external pre-regulation. |
| IOUT per Phase | 2.5A continuous - defined under thermal limits and PCB layout; actual current depends on ambient temperature and copper area. |
| RDS(ON) (HS/LS) | 135–170mΩ / 150–185mΩ - enables low conduction loss at 1A, critical for efficiency in 24V motor drives. |
| OCP Threshold | 3–4.5A - detects winding short or stall; deglitched for 1µs to reject transient spikes. |
| UVLO Rising Threshold | 4.5V - prevents erratic operation during brown-out; 300mV hysteresis avoids oscillation near threshold. |
| Thermal Shutdown | 165°C - protects die during overload; auto-recovery after cooldown eliminates manual reset requirement. |
| nFAULT Output | Open-drain, logic-low during fault - interfaces directly with µC GPIO with external pull-up; no internal pull-up. |
Pinout & Package
MP6545GV-Z uses a thermally enhanced QFN-28 (4mm × 5mm) package with exposed thermal pad. Pin numbering follows standard QFN top-view orientation (Pin 1 at top-left corner, counterclockwise). All logic inputs include internal 100kΩ pull-down resistors.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 8) | Input supply rail | Two dedicated pins reduce IR drop; requires ≥100nF ceramic bypass per pin placed adjacent to IC. |
| OUT1–OUT3 (Pins 2, 4, 5) | Half-bridge output terminals | Drive motor phases directly; each connects to one leg of star/delta-connected BLDC windings. |
| PGND (Pins 3, 6) | Power ground return | Separate from signal GND; must be tied to large copper pour under thermal pad for heat dissipation. |
| GND (Pins 11, 24) | Signal reference ground | Connects to µC ground plane; kept isolated from PGND except at single-point star ground. |
| HS1–HS3 (Pins 16, 18, 20) | High-side gate enable inputs | Logic-high turns on respective HS-FET; internal pull-down ensures safe default-off state. |
| LS1–LS3 (Pins 17, 19, 21) | Low-side gate enable inputs | Logic-high turns on respective LS-FET; enables synchronous rectification when both HS/LS are off. |
| nSLEEP (Pin 14) | Low-power mode control | Pull low to disable charge pump and all outputs; 600µs wake-up delay required before valid PWM. |
| nRESET (Pin 13) | Protection latch reset | Pull low to clear OCP/OVP/OTP faults and force Hi-Z outputs; resets internal logic state. |
| nFAULT (Pin 15) | Fault status indicator | Open-drain output pulled low during any active protection event; requires external pull-up resistor. |
| VREG (Pin 12) | Internal 5V regulator output | Powers LS gate drivers; requires 1µF X7R ceramic capacitor to GND for stability. |
| VCP (Pin 27) | Charge pump output | Supplies >VIN+5V for HS gate drive; requires 1µF X7R ceramic capacitor to VIN. |
| CPA/CPB (Pins 25, 26) | Charge pump flying capacitor nodes | Connect 100nF X7R capacitor rated for full VIN; forms bootstrap circuit for HS gate voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Three-channel half-bridge integration | Eliminates six discrete MOSFETs and associated gate drivers, reducing BOM count and PCB footprint by >40% vs. discrete solutions. |
| Automatic synchronous rectification | Enables body-diode bypass during inductive flyback - reduces power loss and heat rise in LS-FETs during PWM off-time. |
| Hardware-based protection suite | OCP, OVP, UVLO, and thermal shutdown operate independently of firmware - ensures fail-safe motor stop during fault conditions. |
| Independent HS/LS control per phase | Supports trapezoidal and sinusoidal commutation schemes via direct µC GPIO control - no external logic or gate driver IC needed. |
| QFN-28 (4mm×5mm) thermal design | Exposed thermal pad + 4 thermal vias recommended - achieves θJA = 40°C/W on 4-layer board, enabling 2.5A continuous operation at 70°C ambient. |
Applications
| BLDC Motor Drive | Laser Printer Engine |
|---|---|
|
Use Scenario: Driving 3-phase, star-connected BLDC motors in HVAC blowers and industrial fans operating from 24V DC bus. IC Role / Device Role / Timing Role: Three-phase power stage delivering synchronized PWM-controlled current to motor windings; handles gate drive, current sensing, and protection autonomously. Use Value: Enables compact, thermally efficient motor control with integrated 2.5A capability and 150mΩ RDS(ON), reducing heatsink requirements and system cost. |
Use Scenario: Precision paper feed and fuser roller actuation in mid-volume laser printers using 24–40V DC supply rails. IC Role / Device Role / Timing Role: Half-bridge driver for stepper-assisted rollers and toner transfer belts; supports fast direction reversal and torque control via HS/LS logic. Use Value: Hardware OCP and UVLO prevent damage during paper jams or power fluctuations; nFAULT provides immediate fault reporting to printer controller. |
| Textile Machine Spindle | Small CNC Router Axis |
|
Use Scenario: Speed-regulated spindle drive in compact textile looms requiring smooth 0–10krpm operation from 36V battery or SMPS. IC Role / Device Role / Timing Role: Primary power stage executing commutation commands from motion controller; manages dead time (80ns) and gate timing skew (<360ns). Use Value: Integrated charge pump and VREG eliminate external bias supplies; thermal shutdown prevents coil burnout during prolonged stall conditions. |
Use Scenario: X/Y/Z axis motor control in desktop CNC routers using 24V or 48V input with microstepping-compatible commutation. IC Role / Device Role / Timing Role: High-efficiency power delivery stage interfacing with FPGA or ARM-based motion controller; supports rapid acceleration/deceleration profiles. Use Value: Low RDS(ON) minimizes I²R losses during high-current cutting loads; nSLEEP reduces quiescent current to <10µA during idle periods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar three-phase half-bridge power stage applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP6550GV-Z | Higher 5A per-phase rating, 100mΩ RDS(ON), same QFN-28 package, but requires larger thermal management. | Better suited for 48V industrial pumps or higher-torque BLDCs; not drop-in due to different OCP thresholds and timing. | Select when >2.5A continuous current or lower conduction loss is required; verify PCB thermal relief and gate drive timing compatibility. |
| STSPIN32F0A | Integrated 32-bit MCU + gate driver + three-phase power stage (60V, 1.4A); includes embedded motor control firmware. | Targets sensorless FOC applications; adds software overhead but reduces external component count. | Choose when closed-loop field-oriented control is needed and firmware development resources are available; not suitable for simple trapezoidal drive. |
Compared with MP6545GV-Z, MP6550GV-Z offers higher current headroom at the cost of increased thermal demand, while STSPIN32F0A trades raw power density for embedded intelligence - making MP6545GV-Z optimal for cost-sensitive, firmware-light BLDC systems needing proven 2.5A reliability.
Availability
MP6545GV-Z is available at Aetrix Electronics and suitable for brushless DC motor drives, laser printer engines, textile machine spindles, and small CNC router axes requiring stable component supply across production lifecycles.
Supply support for MP6545GV-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 power management ICs, with expertise in DC/DC converters, motor drivers, and power modules since 1997.
The MP6545 belongs to MPS's Simple Three-Phase Power Stage product line, engineered for compact, thermally robust BLDC motor control in space-constrained industrial and office equipment - prioritizing integration, protection autonomy, and layout simplicity.
FAQ
What is the maximum continuous output current per phase for MP6545GV-Z?
The MP6545GV-Z delivers up to 2.5A per phase continuously under specified thermal conditions: 25°C ambient, 4-layer PCB with adequate copper pour and thermal vias. Actual current depends on PCB layout, ambient temperature, and airflow - derating applies above 70°C ambient per the θJA = 40°C/W thermal resistance spec.
Does MP6545GV-Z require external gate resistors?
No external gate resistors are required for basic operation. The MP6545GV-Z integrates optimized gate drivers with controlled slew rates. However, small series resistors (≤5Ω) may be added to HS/LS inputs if EMI reduction or ringing suppression is needed in high-noise environments - not for current limiting.
How does automatic synchronous rectification work in MP6545GV-Z?
When both HSx and LSx are low, the MP6545GV-Z monitors OUTx voltage. If VOUTx falls below GND, it turns on LSx to conduct recirculating current; if VOUTx exceeds VIN, it turns on HSx. This replaces body-diode conduction, reducing power loss and heat generation during PWM off-time.
Can MP6545GV-Z operate with a 3.3V microcontroller interface?
Yes. The MP6545GV-Z logic inputs accept 0.8V (VIL) max for low and 2.0V (VIH) min for high, fully compatible with 3.3V CMOS outputs. Input leakage is ±100µA, and internal 100kΩ pull-downs ensure safe default state without external resistors.
What is the purpose of the CPA and CPB pins?
CPA and CPB form the flying capacitor node pair for the internal charge pump. A 100nF X7R ceramic capacitor rated for full VIN must connect between them to generate the boosted voltage (VCP > VIN+5V) required to fully enhance the high-side N-channel MOSFETs - essential for reliable 100% duty-cycle operation.
Is MP6545GV-Z RoHS-compliant and halogen-free?
Yes. MP6545GV-Z is lead-free, halogen-free, and fully compliant with the EU RoHS directive. MPS confirms green status per its Quality Assurance documentation, and the device meets JEDEC MSL Level 2 moisture sensitivity requirements for surface-mount assembly.
MP6545GV-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 28-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- Multiphase
- Motor Type - AC, DC:
- Brushed DC
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (3)
- Interface:
- Logic
- Technology:
- Power MOSFET
- Step Resolution:
- -
- Applications:
- General Purpose
- Current - Output:
- 2.5A
- Voltage - Supply:
- 4.5V ~ 45V
- Voltage - Load:
- 4.5V ~ 45V
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-QFN (4x5)
MP6545GV-Z FAQ
1.How can I place an order for MP6545GV-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP6545GV-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 MP6545GV-Z reliable?
The price and inventory of MP6545GV-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP6545GV-Z is usually 5 days.
3.What payment methods are accepted for MP6545GV-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP6545GV-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP6545GV-Z?
MP6545GV-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP6545GV-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 MP6545GV-Z?
For technical support, including MP6545GV-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP6545GV-Z requirements.
6.How does Aetrix verify that MP6545GV-Z is sourced from the original manufacturer or authorized distributors?
All MP6545GV-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 MP6545GV-Z meets industry standards.
7.What is the process for return or replacement of MP6545GV-Z?
All MP6545GV-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP6545GV-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 MP6545GV-Z part is unused and in its original packaging.
Return procedure for MP6545GV-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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