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Microchip Technology ATA6831C-PIQW-1
- Part No.:
- ATA6831C-PIQW-1
- Manufacturer:
- Microchip Technology
- Category:
- Full Half-Bridge (H Bridge) Drivers
- Package:
- 18-VFQFN Exposed Pad
- Datasheet:
-
ATA6831C-PIQW-1.pdf
- Description:
- IC HALF BRIDGE DRIVER 1A 18QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,530
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Product details
Overview
ATA6831C-PIQW-1 from Microchip Technology (formerly Atmel) is a triple half-bridge driver IC designed for automotive and industrial load control. It integrates three independently controllable high-side/low-side switch pairs, supports up to 1.0A per channel, features SPI daisy-chain interface (2MHz), PWM-controlled switching (25kHz HS / 8kHz LS), and comprehensive diagnostics including open-load, short-circuit, overtemperature, and undervoltage detection. It is used in body control modules to drive DC motors, bulbs, and solenoids.
For engineers reviewing the ATA6831C-PIQW-1 datasheet, ATA6831C-PIQW-1 pinout, ATA6831C-PIQW-1 application, or ATA6831C-PIQW-1 equivalent, key selection considerations include its QFN18 package with exposed thermal pad, SOI-based robustness against conducted interference and 2kV HBM ESD, integrated shoot-through prevention, and diagnostic register reporting via 16-bit SPI status word.
Technical Context
The ATA6831C-PIQW-1 implements six MOSFET drivers-three high-side and three low-side-internally configured as three independent half-bridges. Each output stage includes current-limited switching, reverse diodes, and dedicated fault detectors for short-circuit, open-load, and thermal events.
Its serial interface uses a 16-bit input register (LSB-first) for control and a 16-bit output register for status feedback, supporting daisy-chaining. The PWM input enables synchronous modulation of selected outputs, while the inhibit (SI) bit enables sub-2µA standby mode without disabling communication.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Configuration | Three independent half-bridges (HS1/LS1, HS2/LS2, HS3/LS3) |
| Max Output Current | 1.0A continuous per channel; internally current-limited with shutdown threshold 1.0–2.0A depending on VS |
| RDS(on) | 1.5Ω max at 150°C per switch; enables <1.5W conduction loss at 1A |
| PWM Frequency Support | Up to 25kHz for high-side, 8kHz for low-side; sufficient for smooth DC motor torque control |
| SPI Interface Speed | 2MHz clock; supports real-time status polling and multi-device daisy-chain configuration |
| Supply Voltage Range | 7.5V to 40V on VS pins; compatible with 12V/24V automotive battery systems including load-dump transients |
| Quiescent Current | <2µA in standby (INH = low); meets automotive always-on module requirements |
Pinout & Package
ATA6831C-PIQW-1 is housed in a thermally enhanced QFN18 package (4mm × 4mm, 0.5mm pitch) with an exposed die pad (2.7mm × 3.175mm) for PCB-level heat dissipation. Pin 1 is marked by a corner chamfer; the package is Pb-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1F, OUT2F, OUT3F (Pins 15, 12, 2) | Main half-bridge output terminals | Each connects to one side of a load (e.g., motor winding); integrates internal power MOSFETs and reverse diodes with short-circuit protection |
| VS1, VS2 (Pins 10, 11) | Power supply inputs for output stages | VS1 powers OUT1/OUT2; VS2 powers OUT2/OUT3; dual supplies enable independent rail management and fault isolation |
| VCC (Pin 9) | Logic supply input | 5V ±5% supply for digital core and SPI interface; separate from high-voltage VS rails |
| GND, PGND1–PGND3 (Pins 8, 17, 14, 18) | Ground connections | Dedicated logic GND (Pin 8) and three isolated power ground pins reduce noise coupling between channels |
| CS, DI, CLK, DO, PWM (Pins 3–7) | SPI + PWM control interface | 5V CMOS-compatible; DO is tri-state and daisy-chainable; PWM input enables external duty-cycle control of selected outputs |
Key Features
| Feature | Design Value |
|---|---|
| No shoot-through current | Hardware-enforced dead time prevents simultaneous HS/LS conduction, eliminating destructive cross-conduction during switching transitions |
| Selective overtemperature protection | Per-channel thermal shutdown (Tj ≥150°C) and prewarning (Tj ≥120°C) reported individually in status register bits 1–6 |
| Open-load detection | Configurable pull-up/pull-down currents (2.5mA HS / 9mA LS) enable H-bridge motor connection verification with ≤170Ω max load resistance |
| Diagnostic register reporting | 16-bit SPI status word provides real-time visibility into faults: PSF (power fail), TP (thermal prewarning), OVL (overload), INH (standby), and per-output SxH/SxL states |
| Automotive qualification | ISO 7637-1 Level 4 surge immunity, VDE 0879 Part 2 Level 5 interference suppression, and 2kV HBM ESD rating ensure robust operation in harsh vehicle environments |
Applications
| Body Control Module (BCM) | Seat Motor Control |
|---|---|
Use Scenario: Driving window lift motors, door locks, and mirror actuators in modern automotive BCMs. IC Role / Device Role / Timing Role: Half-bridge driver providing bidirectional current control and real-time fault monitoring for resistive and inductive loads. Use Value: Enables single-chip control of three independent loads with integrated diagnostics, reducing BOM count and improving system reliability versus discrete FET solutions. | Use Scenario: Controlling forward/reverse motion of power seat adjustment motors. IC Role / Device Role / Timing Role: Configured as H-bridge using two half-bridges per motor to deliver reversible torque with PWM speed regulation. Use Value: Supports smooth 25kHz PWM commutation without audible noise, while open-load detection confirms motor wiring integrity before actuation. |
| Engine Cooling Fan Control | Industrial Valve Actuation |
Use Scenario: Regulating 12V/24V brushless DC cooling fans in engine compartments. IC Role / Device Role / Timing Role: High-side switch driver with thermal prewarning (TP bit) enabling predictive fan speed ramping before thermal shutdown. Use Value: Prevents sudden fan stoppage by triggering thermal derating at 120°C junction temperature, extending component lifetime under sustained high-temp operation. | Use Scenario: Driving solenoid valves and positioner coils in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Robust load interface with short-circuit protection and undervoltage lockout (PSF bit) ensuring safe deactivation during brown-out conditions. Use Value: Eliminates need for external current-sense amplifiers and discrete protection circuitry, simplifying PCB layout and improving field-reliability in dusty, vibration-prone environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple half-bridge driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STSPIN32F0A | Integrated 32-bit ARM Cortex-M0 MCU + gate drivers; requires firmware development; no native SPI status register | Targeted at closed-loop motor control with embedded motion algorithms; less suitable for simple load switching with diagnostics | Choose STSPIN32F0A only if on-chip processing and FOC capability are required; ATA6831C-PIQW-1 offers simpler, deterministic SPI-based control. |
| TLE9201SG | Triple high-side driver only (no low-side); 60V abs max; no open-load detection; SPI status limited to error flags only | Designed for high-voltage industrial loads where low-side switching is handled externally; lacks integrated H-bridge diagnostics | Choose TLE9201SG for >40V applications or when external low-side control is preferred; ATA6831C-PIQW-1 provides full half-bridge integration and richer diagnostics. |
Compared with STSPIN32F0A and TLE9201SG, the ATA6831C-PIQW-1 uniquely delivers three fully protected half-bridges with unified SPI status reporting, automotive-grade EMC/ESD robustness, and sub-2µA standby-making it optimal for cost-sensitive, safety-aware load switching without embedded processing overhead.
Availability
ATA6831C-PIQW-1 is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor control, and HVAC actuator systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for ATA6831C-PIQW-1 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
Microchip Technology acquired Atmel in 2016 and maintains its automotive analog and power portfolio. The company specializes in microcontrollers, analog, interface, and power management ICs for industrial, automotive, and IoT applications.
The ATA6831C-PIQW-1 belongs to Microchip's automotive-qualified smart power driver family, engineered specifically for robust, diagnostic-rich load control in 12V/24V vehicle electrical systems and harsh industrial environments.
FAQ
What is the maximum operating voltage for the ATA6831C-PIQW-1 power supply pins?
The ATA6831C-PIQW-1 supports a VS supply range of 7.5V to 40V across pins 10 (VS1) and 11 (VS2), with absolute maximum rating of –0.3V to +40V. This accommodates automotive battery systems including cold-crank (≥6V) and load-dump (≤40V) transients. Operation below 7.5V triggers undervoltage lockout (PSF bit set).
Does the ATA6831C-PIQW-1 support daisy-chained SPI communication?
Yes, the ATA6831C-PIQW-1 supports daisy-chained SPI communication via its tri-state DO (pin 7) output. When CS is low, DO drives status data; when CS is high, DO enters high-impedance state, allowing multiple ATA6831C-PIQW-1 devices to share a single DO line while using individual CS lines for addressing.
How does open-load detection work on the ATA6831C-PIQW-1?
When the OLD bit (bit 13) in the input register is set low, the ATA6831C-PIQW-1 applies 2.5mA pull-up current to each high-side output and 9mA pull-down current to each low-side output. Open-load condition is detected by reading corresponding status bits (1–6) in the output register after executing defined H-bridge test sequences, with maximum detectable load resistance of 170Ω.
What thermal protection mechanisms are implemented in the ATA6831C-PIQW-1?
The ATA6831C-PIQW-1 implements per-channel thermal prewarning (TP bit set at Tj ≥120°C) and thermal shutdown (output disabled at Tj ≥150°C). Both thresholds include hysteresis (15K) to prevent oscillation. The TP bit is readable independently via DO pin timing, enabling fast thermal monitoring without full SPI transaction.
Can the ATA6831C-PIQW-1 drive inductive loads like DC motors without external flyback protection?
Yes, the ATA6831C-PIQW-1 integrates reverse diodes across each high-side and low-side switch, enabling safe commutation of inductive loads such as DC motors without external flyback diodes. Its SOI process technology and built-in short-circuit protection further enhance ruggedness during inductive kickback events.
ATA6831C-PIQW-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 18-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Half Bridge (3)
- Applications:
- Bulbs, DC Motors, Resistors
- Interface:
- PWM, SPI
- Load Type:
- Inductive, Capacitive, Resistive
- Technology:
- Power MOSFET
- Rds On (Typ):
- 800mOhm LS, 800mOhm HS
- Current - Output / Channel:
- 1A
- Current - Peak Output:
- -
- Voltage - Supply:
- 4.75V ~ 5.25V
- Voltage - Load:
- 5.6V ~ 40V
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Fault Protection:
- Open Load Detect, Over Temperature, Short Circuit, UVLO
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 18-QFN (4x4)
ATA6831C-PIQW-1 FAQ
1.How can I place an order for ATA6831C-PIQW-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ATA6831C-PIQW-1 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 ATA6831C-PIQW-1 reliable?
The price and inventory of ATA6831C-PIQW-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATA6831C-PIQW-1 is usually 5 days.
3.What payment methods are accepted for ATA6831C-PIQW-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATA6831C-PIQW-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATA6831C-PIQW-1?
ATA6831C-PIQW-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATA6831C-PIQW-1 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 ATA6831C-PIQW-1?
For technical support, including ATA6831C-PIQW-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATA6831C-PIQW-1 requirements.
6.How does Aetrix verify that ATA6831C-PIQW-1 is sourced from the original manufacturer or authorized distributors?
All ATA6831C-PIQW-1 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 ATA6831C-PIQW-1 meets industry standards.
7.What is the process for return or replacement of ATA6831C-PIQW-1?
All ATA6831C-PIQW-1 units undergo pre-shipment inspection (PSI). If there is an issue with ATA6831C-PIQW-1, 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 ATA6831C-PIQW-1 part is unused and in its original packaging.
Return procedure for ATA6831C-PIQW-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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