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Microchip Technology ATA6831-PISW
- Part No.:
- ATA6831-PISW
- Manufacturer:
- Microchip Technology
- Category:
- Full Half-Bridge (H Bridge) Drivers
- Package:
- 18-VFQFN Exposed Pad
- Datasheet:
-
ATA6831-PISW.pdf
- Description:
- IC HALF BRIDGE DRIVER 1A 18VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,285
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Product details
Overview
ATA6831-PISW 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 and low-side MOSFET drivers (six total), supports up to 1.0A per channel, features RDS(on) ≤ 1.5Ω at 150°C, operates with supply voltage up to 40V, and includes SPI daisy-chain interface up to 2 MHz - enabling precise DC motor, lamp, and inductive load control in body electronics modules.
For engineers reviewing the ATA6831-PISW datasheet, ATA6831-PISW pinout, ATA6831-PISW application, or ATA6831-PISW equivalent, this page delivers verified technical context, validated pin functions, confirmed diagnostic capabilities (open-load, overtemperature, short-circuit), real-world PWM timing constraints (25 kHz HS / 8 kHz LS), and cross-referenced alternatives for automotive-grade motor drive designs.
Technical Context
The ATA6831-PISW implements six fully protected power switches arranged as three independent half-bridges using SOI technology. Each half-bridge combines a high-side and low-side driver with internal reverse diodes, integrated current limiting, and shoot-through prevention logic ensuring safe switching of resistive, capacitive, and inductive loads.
It employs a 16-bit SPI serial interface with chip-select daisy-chaining capability, supports external PWM modulation (up to 25 kHz on high-side outputs), and provides comprehensive diagnostics including temperature prewarning (120–170°C set threshold), open-load detection via programmable pull-up/pull-down currents, and undervoltage protection with 5.6–7.0 V trip level and 0.6 V hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 7.5 V to 40 V - supports wide automotive battery range including cold-crank and load-dump conditions |
| Output Current Rating | 1.0 A continuous per channel - sufficient for driving small DC motors, solenoids, and LED arrays |
| RDS(on) Max | 1.5 Ω at 150°C - ensures thermal stability under sustained load in engine bay environments |
| PWM Frequency Support | Up to 25 kHz (HS), 8 kHz (LS) - enables smooth, low-audio-noise motor speed control |
| SPI Clock Rate | Up to 2 MHz - allows fast configuration and status polling in real-time control loops |
| Quiescent Current | < 5 µA in standby - meets automotive low-power requirements for always-on modules |
| Diagnostic Coverage | Short-circuit, open-load, overtemperature, and power-supply fail detection - reduces need for external monitoring circuitry |
Pinout & Package
ATA6831-PISW uses a QFN18 (4 mm × 4 mm) package with exposed thermal pad (2.7 mm × 3.175 mm), optimized for automotive thermal management. Pin 1 is marked by a dot; GND pins (8, 14, 17, 18) and PGND pins (14, 17, 18) provide dedicated low-inductance return paths for each output stage.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1F, OUT2F, OUT3F | Half-bridge output terminals | Main power outputs forming three independent half-bridges; each includes short-circuit and overtemperature protection |
| CS, DI, CLK, DO, PWM | SPI interface + PWM control inputs | 5 V CMOS-compatible serial interface with tri-state DO enabling daisy-chain topology; PWM input synchronizes all six switches |
| VCC (Pin 9), VS1/VS2 (Pins 10/11) | Logic and power supply rails | VCC = 5 V ±5% logic supply; VS1 powers OUT1/OUT2, VS2 powers OUT2/OUT3 - enables flexible power domain partitioning |
| GND (8,14,17,18), PGND1/2/3 | Ground connections | Dedicated power ground pins per output stage minimize noise coupling and improve EMI performance |
Key Features
| Feature | Design Value |
|---|---|
| No shoot-through current | Hardware-enforced dead time prevents simultaneous conduction of high-side and low-side switches in same half-bridge |
| Selective overtemperature protection | Individual thermal shutdown per switch (Tj off = 150–200°C) plus prewarning flag (TP bit) for predictive thermal management |
| Open-load detection | Configurable pull-up (1–4 mA) and pull-down (–6 to –11 mA) currents enable reliable open-circuit diagnosis without external components |
| Automotive EMC robustness | ISO 7637-1 Level 4 conducted immunity, VDE 0879 Part 2 Level 5 interference suppression, and 2 kV HBM ESD rating |
| Serial daisy-chain capability | Single CS line controls multiple ATA6831-PISW devices; DO pin supports wired-OR connection for compact multi-channel systems |
Applications
| Automotive Seat Motor Control | Industrial Valve Actuation |
|---|---|
Use Scenario: Precise bidirectional positioning of power seat motors using PWM-modulated half-bridge outputs. IC Role / Device Role / Timing Role: ATA6831-PISW serves as the primary motor driver interface between MCU and dual-wound DC motor, managing direction, speed, and fault reporting via SPI. Use Value: Integrated diagnostics eliminate need for external current sensing and thermal monitoring, reducing BOM count and PCB area in space-constrained seat modules. | Use Scenario: Driving solenoid valves in HVAC or fluid control systems requiring robust short-circuit tolerance and open-load verification. IC Role / Device Role / Timing Role: ATA6831-PISW acts as protected load switch with configurable PWM dimming and real-time status feedback to PLC controller. Use Value: RDS(on) ≤ 1.5 Ω at 150°C ensures stable operation during extended valve actuation cycles in hot industrial enclosures. |
| Automotive Headlamp Dimming | Industrial Conveyor Belt Control |
Use Scenario: Smooth analog-like brightness control of halogen or LED headlamps using high-frequency PWM on high-side outputs. IC Role / Device Role / Timing Role: ATA6831-PISW provides isolated, current-limited high-side switching with 25 kHz PWM support and overvoltage clamping. Use Value: Eliminates audible coil whine while maintaining compliance with automotive EMC standards (ISO 7637-1 Level 4). | Use Scenario: Controlling reversible DC motors in packaging machinery where load reversal and stall detection are critical. IC Role / Device Role / Timing Role: ATA6831-PISW delivers coordinated H-bridge operation across two channels, with synchronized diagnostics for motor winding integrity. Use Value: Selective overtemperature protection per switch prevents system shutdown during temporary overloads, improving uptime in continuous production lines. |
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 |
|---|---|---|---|
| BD3539FV-M | Three independent high-side drivers only; no low-side or half-bridge capability; 0.6 Ω RDS(on); 1.5 A rating | Lacks integrated low-side switches and SPI diagnostics; requires external FETs and logic for full H-bridge operation | Choose BD3539FV-M only when high-side-only control suffices and board space allows discrete low-side implementation |
| TLE9201SG | Triple half-bridge with 2.8 A rating, 1.2 Ω RDS(on), LIN interface instead of SPI, higher quiescent current (15 µA) | Designed for LIN-based automotive body networks; lacks daisy-chain SPI and has different diagnostic register mapping | Select TLE9201SG when integrating into LIN subsystems and higher current delivery is required, accepting trade-offs in interface compatibility and standby power |
Compared with BD3539FV-M and TLE9201SG, the ATA6831-PISW uniquely balances SPI daisy-chain scalability, true half-bridge integration, sub-5 µA standby consumption, and automotive-grade EMC/ESD robustness - making it optimal for cost-sensitive, space-constrained, and thermally demanding motor control nodes.
Availability
ATA6831-PISW is available at Aetrix Electronics and suitable for automotive body electronics, industrial actuator modules, and smart lighting systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for ATA6831-PISW 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 driver portfolio with rigorous qualification and long-term support commitments.
The ATA6831-PISW belongs to Microchip's automotive-grade power driver family, engineered specifically for robust, diagnostic-rich control of DC motors, lamps, and solenoids in harsh environments such as engine compartments and industrial control cabinets.
FAQ
What is the maximum PWM frequency supported by the ATA6831-PISW for high-side and low-side outputs?
The ATA6831-PISW supports PWM frequencies up to 25 kHz on high-side outputs and up to 8 kHz on low-side outputs. This asymmetry reflects optimized switching characteristics for typical motor control waveforms. The PWM signal is applied externally to the dedicated PWM pin and routed to selected outputs via PLx/PHx bits in the input register. Timing parameters are validated across –40°C to +150°C junction temperature range.
Does the ATA6831-PISW include built-in protection against shoot-through current?
Yes, the ATA6831-PISW incorporates hardware-level shoot-through prevention logic that enforces minimum dead time between high-side and low-side switch transitions within each half-bridge. This eliminates risk of destructive through-current during commutation, even under transient conditions or software timing errors. The feature is intrinsic to the SOI process design and requires no external timing components or configuration.
How does open-load detection work on the ATA6831-PISW, and what are its thresholds?
The ATA6831-PISW performs open-load detection by enabling internal pull-up (1–4 mA) and pull-down (–6 to –11 mA) currents when the OLD bit is low. High-side open-load is flagged when output voltage exceeds VVS – 2.5 V, and low-side open-load when output voltage falls below 1.5 V (at VVS = 13 V). These thresholds are factory-characterized and stored in the device's electrical specification table (4.12a/4.13a).
Can multiple ATA6831-PISW devices be connected in a daisy-chain configuration, and how is this implemented?
Yes, ATA6831-PISW supports daisy-chain SPI communication. Multiple devices share the same CS, CLK, DI, and PWM lines, while their DO pins are wired in parallel (wired-OR). Data is shifted through the chain: the first device receives 16 bits on DI and forwards status data on DO to the next device's DI. Chip select must be asserted sequentially if individual addressing is needed; otherwise, broadcast writes are possible.
What is the thermal shutdown behavior of the ATA6831-PISW, and how is recovery handled?
The ATA6831-PISW disables affected outputs when junction temperature exceeds 150–200°C (Tj switch-off), sets the OVL bit, and holds the corresponding status bit low. Recovery occurs only after temperature drops below 135–185°C (Tj switch-on) AND the SRR (status register reset) bit is written high. This two-condition reset prevents oscillation and ensures safe re-engagement after thermal events - a behavior explicitly defined in Section 3.4 of the ATA6831-PISW datasheet.
ATA6831-PISW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 18-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Half Bridge (3)
- Applications:
- Bulbs, DC Motors, Resistors
- Interface:
- PWM, SPI
- Load Type:
- Inductive, Capacitive, Resistive
- Technology:
- -
- Rds On (Typ):
- 1.5Ohm
- Current - Output / Channel:
- 1A
- Current - Peak Output:
- 1.3A
- Voltage - Supply:
- 4.75V ~ 5.25V
- Voltage - Load:
- 7V ~ 40V
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Fault Protection:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 18-VQFN (4x4)
ATA6831-PISW FAQ
1.How can I place an order for ATA6831-PISW through Aetrix?
Please submit a Request for Quotation (RFQ) for ATA6831-PISW 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 ATA6831-PISW reliable?
The price and inventory of ATA6831-PISW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATA6831-PISW is usually 5 days.
3.What payment methods are accepted for ATA6831-PISW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATA6831-PISW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATA6831-PISW?
ATA6831-PISW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATA6831-PISW 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 ATA6831-PISW?
For technical support, including ATA6831-PISW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATA6831-PISW requirements.
6.How does Aetrix verify that ATA6831-PISW is sourced from the original manufacturer or authorized distributors?
All ATA6831-PISW 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 ATA6831-PISW meets industry standards.
7.What is the process for return or replacement of ATA6831-PISW?
All ATA6831-PISW units undergo pre-shipment inspection (PSI). If there is an issue with ATA6831-PISW, 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 ATA6831-PISW part is unused and in its original packaging.
Return procedure for ATA6831-PISW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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