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Monolithic Power Systems Inc. MP6615GQKT-P
- Part No.:
- MP6615GQKT-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Motor Drivers, Controllers
- Package:
- 26-PowerWQFN
- Datasheet:
-
MP6615GQKT-P.pdf
- Description:
- 45V, 9M H-BRIDGE MOTOR DRIVER
- Quantity:
- Payment:
- Shipping:
Inventory:411
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Product details
Overview
MP6615GQKT-P from Monolithic Power Systems is a 40V, 8A H-bridge DC motor driver IC integrating four N-channel power MOSFETs (11mΩ RDS(ON) at 25°C), internal charge pump for 100% duty-cycle operation, bidirectional current-sense amplifiers (1/11000 A/A typical ratio), and comprehensive protection including thermal shutdown, UVLO (4.4V threshold), OCP (25A HS/LS trip), and OVP (48V threshold). It drives brushed DC motors in automotive seat actuators.
For engineers reviewing the MP6615GQKT-P datasheet, MP6615GQKT-P pinout, MP6615GQKT-P application, or MP6615GQKT-P equivalent, key selection criteria include continuous 8A output capability under thermal constraints, configurable input modes (EN/PWM, DIR/BRK, INH/INL), integrated current sensing with ±20µA offset, and TQFN-26 package thermal resistance (θJA = 21.4°C/W).
Technical Context
The MP6615 implements a fully integrated H-bridge topology with synchronous rectification to minimize body-diode conduction losses during current recirculation. Its charge pump generates gate drive voltage for high-side MOSFETs, enabling 100% duty cycle operation without external bootstrap components.
Three programmable input modes-selected via INM[1:0] pins-support EN/PWM control (mode 00), direction/brake control (mode 01), or discrete high-side/low-side enable (mode 10). Current sensing uses matched amplifiers with SOA/SOB outputs referenced to VREF, supporting ratiometric ADC interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.75V to 40V - supports 12V/24V automotive and industrial supply rails with 45V absolute max rating. |
| Continuous Output Current | 8A - achievable with proper PCB copper area and thermal vias per TQFN-26 layout guidelines. |
| MOSFET RDS(ON) | 11mΩ per FET at 25°C - enables <1.4W conduction loss per channel at 8A, reducing heatsink requirements. |
| Current-Sense Ratio | 1/11000 A/A (Phase A) - delivers ~91µA output per amp of load current, compatible with standard 5V ADC reference designs. |
| UVLO Threshold | 4.4V (typical) - prevents erratic operation during cold-crank or brownout conditions in automotive systems. |
| OCP Trip Level | 25A (HS & LS) - provides robust short-circuit protection while allowing brief inrush currents during motor startup. |
| Thermal Shutdown | 150°C junction temperature - disables all outputs until die cools by 25°C hysteresis, preventing permanent damage. |
Pinout & Package
TQFN-26 (6mm × 6mm) package with exposed thermal pad; requires solder reflow per JEDEC J-STD-020, MSL Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 nFAULT | Open-drain fault indicator | Pulled low during OCP, OTP, or OVP; requires external pull-up for MCU interrupt detection. |
| 2 nSLEEP | Active-low sleep enable | Reduces quiescent current to 1µA; 1ms wake-up delay ensures stable gate drive initialization. |
| 3 ENA/ENBL/INHA | Configurable phase A control | Mode-selectable as enable (mode 00), bridge enable (mode 01), or high-side enable (mode 10). |
| 4 PWMA/DIR/INLA | Configurable phase A signal | Accepts PWM input (mode 00), direction command (mode 01), or low-side enable (mode 10). |
| 5 ENB/BRK/INHB | Configurable phase B control | Supports independent phase enable, brake activation, or high-side control depending on INM[1:0]. |
| 6 PWMB/BMOD/INLB | Configurable phase B signal | Enables dual-mode braking (HS or LS forced conduction) when BMOD is asserted in mode 01. |
| 7–8 INM1, INM0 | Input mode selection | Set three distinct logic interfaces without firmware changes; internal 500kΩ pull-downs simplify default state. |
| 9,11,13 PGND | Power ground | Must be connected directly to low-impedance ground plane; separate from signal GND to avoid noise coupling. |
| 10,12,23 SB | Phase B output | High-current path to motor winding; requires wide copper traces and thermal vias for 8A operation. |
| 14 VG | Low-side gate drive supply | Requires 4.7µF X7R ceramic capacitor to GND; powers LS-FET drivers with regulated 5.5V output. |
| 15–16 SOA, SOB | Current-sense outputs | Deliver proportional current signals (±20µA offset) for closed-loop torque/speed control via external ADC. |
| 17 OCMD | OCP mode configuration | GND = latch-off; open/high = auto-retry every 2ms - enables fail-safe vs. self-recovering system behavior. |
| 18 GND | Signal ground | Reference for logic inputs and VREF; must be star-connected to PGND at single point to minimize ground bounce. |
| 19 VCP | Charge pump output | Supplies HS-FET gate drive; requires 1µF/16V X7R cap between VCP and VIN to sustain 100% duty cycle. |
| 20–21 CP1, CP2 | Charge pump capacitors | 0.1µF X7R cap between CP1–CP2 forms oscillator tank; voltage rating must exceed VIN for reliability. |
| 22,24,26 VIN | Power input | Three parallel pins reduce IR drop and improve thermal dissipation; connect to bulk capacitance near device. |
| 25 SA | Phase A output | Paired with SB to form full H-bridge; identical layout rules apply for symmetric current handling. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 4-N-Channel H-Bridge | Eliminates need for external MOSFETs, gate drivers, and level shifters - reduces BOM count by ≥12 components. |
| Configurable Input Modes | Three INM[1:0]-selected interfaces (EN/PWM, DIR/BRK, INH/INL) enable reuse across motor control architectures without hardware change. |
| Bidirectional Current Sensing | SOA/SOB outputs support real-time torque monitoring and stall detection in both forward/reverse directions using single-ended ADCs. |
| Automatic Synchronous Rectification | Reduces power loss during inductive flyback by actively turning on LS-FETs instead of relying on body diodes - improves efficiency by ~15% at 5A. |
| Robust Protection Suite | Independent HS/LS OCP, 48V OVP, 4.4V UVLO, and 150°C thermal shutdown provide layered fault coverage for safety-critical motion systems. |
Applications
| Automotive Seat Actuators | Industrial Door Locks |
|---|---|
|
Use Scenario: Precise bidirectional positioning of vehicle seat tracks and recliners under E-mark certified EMC conditions. IC Role / Device Role / Timing Role: Full-bridge motor driver executing PWM-controlled torque profiles with real-time current feedback for position verification. Use Value: 8A continuous current supports rapid actuation of high-inertia mechanisms; integrated current sense enables ASIL-B compliant stall detection without external shunts. |
Use Scenario: Secure latching/unlatching of access doors in factory automation systems requiring IP65-rated enclosures. IC Role / Device Role / Timing Role: H-bridge controller managing brushed DC lock motors with brake mode engagement for zero-backlash holding. Use Value: BMOD-configurable braking allows immediate mechanical lock engagement; 40V rating accommodates 36V battery backup supplies. |
| Medical Bed Adjusters | Robotics Joint Actuators |
|
Use Scenario: Smooth, quiet height and tilt adjustment of hospital beds meeting IEC 60601-1 leakage current limits. IC Role / Device Role / Timing Role: Motor driver implementing microstepped PWM control with current limiting to prevent patient discomfort from jerk. Use Value: 11mΩ RDS(ON) minimizes heat generation in sealed enclosures; thermal shutdown prevents overheating during extended duty cycles. |
Use Scenario: Compact joint actuation in collaborative robots requiring precise torque control and fault resilience. IC Role / Device Role / Timing Role: Bidirectional motor driver with OCP-triggered nFAULT signaling for ROS-based safety shutdown coordination. Use Value: Configurable OCMD pin enables either latch-off (for emergency stop) or retry mode (for transient overload recovery) per joint criticality. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar H-bridge motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TB9051FTG | 40V, 5A rated; integrated current sense but no charge pump - limited to <95% duty cycle without external bootstrap. | Lower current capacity suits smaller actuators; lacks 100% duty cycle support required for static holding. | Select when peak current ≤5A and duty cycle constraints allow bootstrap dependency. |
| VNH7040ASTR | 41V, 14A rated; SPI interface for diagnostics; higher RDS(ON) (18mΩ) increases conduction loss at 8A. | Diagnostic reporting supports ISO 26262 ASIL-B systems; larger thermal footprint impacts compact designs. | Select when functional safety compliance and diagnostic logging outweigh efficiency and size requirements. |
Compared with TB9051FTG and VNH7040ASTR, MP6615GQKT-P uniquely balances 8A continuous drive, 100% duty cycle capability via internal charge pump, and minimal external component count - making it optimal for space-constrained, thermally sensitive brushed DC motor systems where reliability and simplicity are prioritized.
Availability
MP6615GQKT-P is available at Aetrix Electronics and suitable for automotive seat actuators, industrial door locks, medical bed adjusters, and robotics joint actuators requiring stable component supply across multi-year production cycles.
Supply support for MP6615GQKT-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, with over 20 years of expertise in DC-DC conversion, motor control, and LED drivers.
The MP6615 belongs to MPS's H-bridge motor driver product line, designed specifically for compact, efficient control of brushed DC motors in automotive, industrial, and medical motion systems where integration, thermal performance, and protection robustness are critical.
FAQ
What input voltage range does MP6615GQKT-P support, and what happens outside this range?
The MP6615GQKT-P operates from 4.75V to 40V, with absolute maximum ratings up to 45V on VIN. Below 4.4V (UVLO threshold), the device disables all outputs and resets internal logic. Above 48V (OVP threshold), outputs shut down immediately without asserting nFAULT; operation resumes automatically once VIN falls below 48V.
How does the MP6615GQKT-P achieve 100% duty cycle operation without external bootstrap components?
It uses an internal charge pump with CP1/CP2/VCP pins to generate gate drive voltage for high-side MOSFETs. A 0.1µF capacitor between CP1–CP2 and a 1µF capacitor between VCP–VIN sustain the charge pump output, eliminating reliance on bootstrap diodes/capacitors and enabling true 100% on-time operation.
What is the function of the OCMD pin, and how does it affect fault recovery behavior?
The OCMD pin selects over-current protection mode: tied to GND enables latch-off (outputs remain disabled until VIN drops below UVLO), while left open or pulled high enables auto-retry (outputs disable for 2ms then re-enable). This allows system-level choice between fail-safe shutdown and transient overload tolerance.
Can MP6615GQKT-P drive motors in both directions, and how is direction controlled?
Yes - direction is controlled in mode 01 (INM[1:0]=01) using the DIR pin: logic high drives current from SA→SB (forward), logic low reverses current flow (SA←SB). Brake mode is activated via BRK or BMOD pins, forcing both HS-FETs or LS-FETs on simultaneously for rapid deceleration.
What PCB layout practices are essential to achieve the rated 8A continuous output current?
To sustain 8A, use ≥2oz copper on inner/outer layers, place thermal vias under the exposed pad (≥9 vias, 0.3mm diameter), route VIN/PGND/SB/SA with ≥3mm trace width, and locate 4.7µF VG and 1µF VCP capacitors within 2mm of respective pins. Follow MPS Figure 4/5 layout guidelines to maintain θJA ≤21.4°C/W.
How accurate is the integrated current sensing, and what is its temperature drift?
Current-sense ratio is 1/11000 A/A (Phase A, typ) with ±15% variation over temperature; offset error is ±20µA at 25°C and remains within ±32µA from –40°C to +125°C. Drift is characterized in datasheet Figures 7–8, showing <±0.5% ratio change over full temperature range.
Is MP6615GQKT-P RoHS-compliant and halogen-free, and what is its moisture sensitivity level?
Yes - MP6615GQKT-P is lead-free, halogen-free, and RoHS-compliant per EU Directive 2011/65/EU. It carries MSL Level 1 rating (unlimited floor life at ≤30°C/85% RH), requiring no baking prior to reflow, per JEDEC J-STD-020 specification.
MP6615GQKT-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 26-PowerWQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- Bipolar
- Motor Type - AC, DC:
- Brushed DC
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (2)
- Interface:
- -
- Technology:
- Power MOSFET
- Step Resolution:
- -
- Applications:
- General Purpose
- Current - Output:
- 8A
- Voltage - Supply:
- 4.75V ~ 40V
- Voltage - Load:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 26-TQFN (6x6)
MP6615GQKT-P FAQ
1.How can I place an order for MP6615GQKT-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP6615GQKT-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 MP6615GQKT-P reliable?
The price and inventory of MP6615GQKT-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP6615GQKT-P is usually 5 days.
3.What payment methods are accepted for MP6615GQKT-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP6615GQKT-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP6615GQKT-P?
MP6615GQKT-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP6615GQKT-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 MP6615GQKT-P?
For technical support, including MP6615GQKT-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP6615GQKT-P requirements.
6.How does Aetrix verify that MP6615GQKT-P is sourced from the original manufacturer or authorized distributors?
All MP6615GQKT-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 MP6615GQKT-P meets industry standards.
7.What is the process for return or replacement of MP6615GQKT-P?
All MP6615GQKT-P units undergo pre-shipment inspection (PSI). If there is an issue with MP6615GQKT-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 MP6615GQKT-P part is unused and in its original packaging.
Return procedure for MP6615GQKT-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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