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Monolithic Power Systems Inc. MP6508GF
- Part No.:
- MP6508GF
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Motor Drivers, Controllers
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MP6508GF.pdf
- Description:
- IC MTR DRV BIPLR 2.7-18V 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,041
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Product details
Overview
MP6508GF from Monolithic Power Systems is a bipolar stepper motor driver IC integrating dual N-channel full-bridge MOSFETs, operating from 2.7V to 18V supply and delivering up to 1.2A per channel. It features integrated current sensing (VREF = 204mV typ), thermal shutdown (165°C), over-current protection (IOCP1 = 3.4A typ), and fault flag output. Used in compact motion control systems such as POS printers and security camera pan/tilt mechanisms.
For engineers reviewing the MP6508GF datasheet, MP6508GF pinout, MP6508GF application, or MP6508GF equivalent, key selection considerations include its TSSOP-16 EP package with exposed thermal pad, dual full-bridge architecture, internal charge pump for high-side drive, 1.6mA quiescent current, and support for both external PWM and internal constant-off-time current regulation.
Technical Context
The MP6508GF implements two independent full-bridge drivers using integrated N-channel MOSFETs (RHS = 250mΩ, RLS = 235mΩ at 25°C), each controlled via dedicated logic inputs (AIN1/AIN2, BIN1/BIN2). It supports both external PWM phase control and internal constant-off-time (TOFF = 26µs typ) current regulation with blanking time (TBLANK = 2.5µs) to suppress switching transients.
Protection circuitry includes independent high-side and low-side over-current detection (IOCP1 = 3.4A, IOCP2 = 2.4A), UVLO (2.5V rising threshold), and thermal shutdown with 15°C hysteresis. The nSLEEP pin enables ultra-low-power sleep mode (1µA), and FAULT pin asserts low on OTP or OCP events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 18V - Enables direct battery operation from single Li-ion (3.7V) up to 12V industrial rails. |
| Output Current Capability | 1.2A per channel - Sustained winding current for NEMA 8–11 size stepper motors in portable equipment. |
| High-Side RDS(on) | 250mΩ (typ @ 9V, 25°C) - Limits conduction loss to ≤360mW per channel at 1.2A, reducing thermal load. |
| Current Sense Threshold | VREF = 204mV (typ) - Sets full-scale current limit with external sense resistor (e.g., 0.167Ω for 1.2A). |
| Quiescent Current | 1.6mA (typ @ VIN=9V) - Minimizes standby power draw in always-on embedded motion controllers. |
| Sleep Current | 1µA - Enables multi-year battery life in intermittently active devices like smart locks or IoT actuators. |
| Fault Response Time | OCP deglitch = 1.1µs, TOCP = 1.8ms - Rejects transient spikes while ensuring fast shutdown during sustained overloads. |
Pinout & Package
MP6508GF uses a thermally enhanced TSSOP-16 EP package (5.0mm × 6.4mm) with exposed thermal pad soldered to PCB ground plane for efficient heat dissipation (θJA = 45°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (AIN2) | Phase A gate control input | Logic-level signal controlling AOUT2 state; used with AIN1 for full-bridge commutation sequencing. |
| 2 (AOUT1) | Phase A motor output terminal | Connects directly to one end of stepper winding A; rated for 1.2A continuous, ±0.3V to VIN+1V swing. |
| 3 (SENA) | Phase A current sense input | Accepts voltage drop across external RSENSE; referenced to internal 204mV comparator for current limiting. |
| 4 (AOUT2) | Phase A motor output terminal | Second connection to winding A; complements AOUT1 to enable bidirectional current flow. |
| 5 (BOUT2) | Phase B motor output terminal | Drives second winding end; identical electrical rating and layout requirements as AOUT1/AOUT2. |
| 6 (SENB) | Phase B current sense input | Dedicated sense path for winding B; enables independent current regulation per phase. |
| 7 (BOUT1) | Phase B motor output terminal | Completes full-bridge for winding B; supports full/half-step and microstepping via input timing. |
| 8 (FAULT) | Open-drain fault indicator | Asserts low on thermal shutdown or OCP; requires external pull-up for system-level fault monitoring. |
| 9 (BST) | Charge pump output | Drives external 10nF–100nF capacitor to generate gate voltage >VIN for high-side N-MOSFET drive. |
| 10 (VIN) | Main power input | 2.7V–18V supply input; powers internal LDO, gate drivers, and logic; decoupled with 10µF ceramic. |
| 11 (GND) | Power ground reference | Common return for motor current, logic, and sense paths; tied to exposed thermal pad for thermal integrity. |
| 12 (VDD) | Internal logic supply | 4.85V regulated output powering control logic; bypassed with 0.1µF near pin for noise immunity. |
| 13 (AIN1) | Phase A gate control input | Complements AIN2 to define AOUT1 state; supports logic-level (0.6V/2V thresholds) interface. |
| 14 (BIN1) | Phase B gate control input | Controls BOUT1 state; identical timing and voltage specs as AIN1/AIN2 for synchronous operation. |
| 15 (nSLEEP) | Active-low sleep enable | Pulling low disables bridges and internal regulators, reducing supply current to 1µA. |
| 16 (BIN2) | Phase B gate control input | Completes four-input logic interface for independent B-phase control and decay mode selection. |
Key Features
| Feature | Design Value |
|---|---|
| Dual full-bridge integration | Eliminates 8 discrete MOSFETs and associated gate drivers, reducing BOM count and PCB area by >40% vs discrete solutions. |
| Internal charge pump | Enables use of low-RDS(on) N-channel MOSFETs on high side without external boost supply or P-channel devices. |
| Programmable current regulation | Supports both external PWM control and internal constant-off-time (26µs) mode with adjustable VREF-based trip point. |
| Thermal-enhanced packaging | TSSOP-16 EP with exposed GND pad achieves 2.8W power dissipation at +25°C ambient, enabling fanless designs. |
| Comprehensive fault protection | Independent high/low-side OCP, UVLO, and thermal shutdown with FAULT pin reporting-no external supervision required. |
Applications
| POS Printers | Video Security Cameras |
|---|---|
|
Use Scenario: Bidirectional paper feed and cutter actuation in compact thermal receipt printers. IC Role / Device Role / Timing Role: Stepper motor driver executing precise half-step sequences under microcontroller command. Use Value: 1.2A drive capability ensures reliable paper handling across varying friction loads; low 1.6mA quiescent current extends battery runtime in portable models. |
Use Scenario: Pan/tilt motion control in indoor/outdoor IP cameras with limited board space. IC Role / Device Role / Timing Role: Dual full-bridge controller managing two stepper motors for orthogonal axis movement. Use Value: Integrated OCP and thermal shutdown prevent field failures during extended continuous operation; TSSOP-EP package fits tight mechanical envelopes. |
| Digital Still Cameras | Battery-Powered Toys |
|
Use Scenario: Autofocus lens positioning and optical image stabilization (OIS) actuation in mirrorless camera modules. IC Role / Device Role / Timing Role: Precision current-regulated stepper driver enabling sub-micron lens positioning accuracy. Use Value: Internal constant-off-time PWM control provides stable current ripple (<5%) across 2.7–18V battery range, maintaining focus resolution. |
Use Scenario: Robotic arm articulation and wheel steering in educational STEM kits powered by AA/AAA batteries. IC Role / Device Role / Timing Role: Low-voltage stepper driver supporting 3V–9V alkaline/NiMH operation with sleep-mode power gating. Use Value: 1µA sleep current extends playtime between battery changes; fault flag allows toy firmware to detect stall conditions and recover gracefully. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bipolar stepper motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TB6600HG | Higher voltage (45V max), higher current (4A), but larger HTSSOP-28 package and no integrated charge pump. | Requires external high-side gate drivers and more complex layout; suited for industrial CNC, not portable devices. | Select when >18V supply or >2A current is required; avoid for space-constrained battery-powered designs. |
| DRV8825 | Microstepping support (up to 1/32), lower max current (2.2A), same 8.2V–45V range, but no integrated charge pump. | Lacks internal charge pump-requires external bootstrap components; optimized for precision microstepping, not cost/space efficiency. | Choose for applications needing fine positional resolution; MP6508GF preferred where simplicity, size, and low-voltage operation dominate. |
Compared with TB6600HG and DRV8825, MP6508GF delivers optimal integration for 2.7V–18V portable systems: its monolithic charge pump eliminates external components, TSSOP-EP package saves >30% board area versus HTSSOP-28, and 1µA sleep current enables multi-year battery life unattainable with alternatives.
Availability
MP6508GF is available at Aetrix Electronics and suitable for POS printers, video security cameras, and digital still cameras requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for MP6508GF 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 mixed-signal ICs for power management and motion control.
The MP6508GF belongs to MPS's integrated motor driver product line, designed specifically for compact, energy-efficient bipolar stepper applications in consumer, industrial, and imaging equipment.
FAQ
What is the maximum motor supply voltage supported by MP6508GF?
The MP6508GF supports an absolute maximum VIN of 20V, with recommended operation from 2.7V to 18V. Exceeding 18V may trigger UVLO or reduce reliability; operation above 20V risks permanent damage per absolute maximum ratings.
Does MP6508GF support microstepping?
No, MP6508GF does not implement microstepping. It supports full-step and half-step excitation only, as defined by sequential logic input patterns on AIN1/AIN2/BIN1/BIN2. Microstepping requires external indexer or dedicated microstepping driver ICs.
How is current limiting configured in internal PWM mode?
In internal PWM mode, current limit is set by the external sense resistor value and the internal VREF (204mV typ). Using Equation ILIMIT = VREF / RSENSE, a 0.167Ω resistor yields ~1.2A limit. Blanking time (2.5µs) prevents false triggering during switching transitions.
What is the purpose of the BST pin and required external component?
The BST pin connects to an external 10nF–100nF ceramic capacitor between BST and VIN. This forms a charge pump that generates a voltage ≥VIN+5V to fully enhance the high-side N-channel MOSFETs, eliminating need for P-channel devices or external boost supplies.
Can MP6508GF drive two independent DC motors?
Yes, MP6508GF can drive two separate DC motors-one per full-bridge-by applying independent PWM signals to AIN1/AIN2 and BIN1/BIN2. Each bridge supports forward/reverse control and current limiting, making it suitable for dual-motor robotics or actuator platforms.
Is the exposed thermal pad on MP6508GF electrically connected?
Yes, the exposed thermal pad on the TSSOP-16 EP package is internally connected to GND. It must be soldered to a PCB copper pour tied to system ground to ensure both thermal performance (2.8W dissipation) and electrical integrity per datasheet layout guidelines.
What happens when the FAULT pin goes low?
A low FAULT pin indicates either over-temperature shutdown (junction >165°C) or over-current event (exceeding IOCP1/IOCP2 thresholds for >1.8ms). The affected bridge is disabled; recovery occurs automatically after fault condition clears and internal reset timer expires (~2ms).
MP6508GF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tube
- 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 (4)
- Interface:
- PWM
- Technology:
- Power MOSFET
- Step Resolution:
- -
- Applications:
- General Purpose
- Current - Output:
- 1.2A
- Voltage - Supply:
- 2.7V ~ 18V
- Voltage - Load:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP-EP
MP6508GF FAQ
1.How can I place an order for MP6508GF through Aetrix?
Please submit a Request for Quotation (RFQ) for MP6508GF 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 MP6508GF reliable?
The price and inventory of MP6508GF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP6508GF is usually 5 days.
3.What payment methods are accepted for MP6508GF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP6508GF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP6508GF?
MP6508GF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP6508GF 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 MP6508GF?
For technical support, including MP6508GF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP6508GF requirements.
6.How does Aetrix verify that MP6508GF is sourced from the original manufacturer or authorized distributors?
All MP6508GF 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 MP6508GF meets industry standards.
7.What is the process for return or replacement of MP6508GF?
All MP6508GF units undergo pre-shipment inspection (PSI). If there is an issue with MP6508GF, 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 MP6508GF part is unused and in its original packaging.
Return procedure for MP6508GF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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