My Inquiry
My Account
Allegro MicroSystems A89103KEVSR-3
- Part No.:
- A89103KEVSR-3
- Manufacturer:
- Allegro MicroSystems
- Category:
- Isolators - Gate Drivers
- Package:
- 28-VFQFN Exposed Pad
- Datasheet:
-
A89103KEVSR-3.pdf
- Description:
- 48V PHASE DISCONNECT IC
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
A89103KEVSR-3 from Allegro MicroSystems is a high-voltage, high-current, monolithic half-bridge gate driver IC designed for controlling external N-channel MOSFETs in DC motor control and power conversion applications. It supports 8–60 V supply voltage, delivers 1 A peak source/sink gate current, integrates bootstrap diode, and features integrated overcurrent protection with fault reporting via open-drain output.
For engineers reviewing the A89103KEVSR-3 datasheet, A89103KEVSR-3 pinout, A89103KEVSR-3 application, or A89103KEVSR-3 equivalent, key selection criteria include bootstrap-enabled high-side drive capability, integrated current-sense comparator threshold (100 mV), thermal shutdown behavior (150 °C trip), and compatibility with 3.3 V/5 V logic inputs in industrial motor drives and battery-powered tools.
Technical Context
The A89103KEVSR-3 implements a non-latched, cycle-by-cycle overcurrent protection scheme triggered by an internal current-sense amplifier comparing VS-to-SHUNT voltage against a fixed 100 mV threshold. Its high-side driver uses adaptive bootstrap charging to sustain operation up to 100% duty cycle under proper timing constraints.
Logic inputs (INH, INL) accept TTL- and CMOS-compatible signals with hysteresis (0.4 V typical), and the FAULT pin asserts low during overcurrent, overtemperature, or undervoltage lockout events. The device operates without external bootstrap capacitor discharge circuitry due to integrated bootstrap diode and internal charge pump assist.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 8 V to 60 V - supports wide-input industrial and 12–48 V battery systems without external regulators |
| Peak Gate Drive Current | ±1 A - enables fast switching of MOSFETs with gate charges up to 40 nC at 100 kHz |
| Bootstrap Diode | Integrated - eliminates external diode, reduces BOM count and layout area for high-side gate drive |
| Overcurrent Threshold | 100 mV - sets current limit at shunt resistor value (e.g., 10 mΩ → 10 A limit) |
| Thermal Shutdown | 150 °C - protects die during sustained overload or poor heatsinking |
| Logic Input Compatibility | 3.3 V / 5 V TTL/CMOS - allows direct interface with microcontrollers and FPGAs without level shifters |
Pinout & Package
Package: 16-pin eTSSOP with exposed thermal pad (EP), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Connects to main 8–60 V rail; bypassed externally with ≥1 μF ceramic capacitor |
| VCC | Internal LDO output | Provides regulated 5 V for logic and gate drive circuits; requires 1 μF decoupling |
| INH | High-side input | Active-high TTL/CMOS input controlling upper MOSFET; includes 0.4 V hysteresis |
| INL | Low-side input | Active-high TTL/CMOS input controlling lower MOSFET; independent of INH timing |
| HV | High-side driver output | Drives gate of external high-side N-MOSFET; connected to bootstrap capacitor top plate |
| LV | Low-side driver output | Drives gate of external low-side N-MOSFET; referenced to power ground |
| VS | High-side source monitor | Connects to source of high-side MOSFET; used for bootstrap recharge and current sensing |
| SHUNT | Current sense input | Inputs voltage across external shunt resistor for overcurrent detection at 100 mV threshold |
| FAULT | Open-drain fault indicator | Pulls low during OCP, OTP, or UVLO; requires external pull-up for microcontroller interrupt |
| EP | Exposed thermal pad | Must be soldered to PCB copper pour for thermal conduction and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap diode | Reduces component count and layout complexity for high-side gate drive in half-bridge topologies |
| Cycle-by-cycle overcurrent protection | Prevents MOSFET destruction during short-circuit events without latching, enabling automatic recovery |
| Adaptive bootstrap charging | Maintains high-side gate drive voltage even at 100% duty cycle when minimum off-time constraints are met |
| Thermal shutdown with hysteresis | Shuts down at 150 °C and resumes only after die cools to ~135 °C, preventing thermal oscillation |
| Undervoltage lockout (UVLO) | Disables outputs if VDD drops below 6.5 V, avoiding erratic switching during brownout conditions |
Applications
| Brushed DC Motor Control | Battery-Powered Power Tools |
|---|---|
Use Scenario: Bidirectional 24 V brushed motor drive in cordless drills with stall detection and thermal management. IC Role / Device Role / Timing Role: Half-bridge gate driver providing synchronized high/low-side MOSFET control and real-time current limiting. Use Value: Enables precise torque control and immediate shutdown on jam detection using 100 mV shunt threshold and FAULT pin interrupt. | Use Scenario: Compact 48 V BLDC motor commutation driver in impact drivers requiring high peak current and compact layout. IC Role / Device Role / Timing Role: High-current gate driver supporting fast PWM switching and integrated bootstrap for space-constrained modules. Use Value: Reduces external components (no discrete bootstrap diode) and improves reliability in vibration-prone tool environments. |
| Industrial Conveyor Systems | Automotive HVAC Blower Control |
Use Scenario: 36 V DC motor actuation in factory automation conveyors with overtemperature monitoring and fault logging. IC Role / Device Role / Timing Role: Robust gate driver with thermal shutdown and FAULT reporting for PLC-connected motor stages. Use Value: Eliminates need for external temperature sensors and simplifies diagnostics via single open-drain fault line. | Use Scenario: 12 V blower fan speed regulation in automotive cabin HVAC with load dump immunity and EMC robustness. IC Role / Device Role / Timing Role: Automotive-qualified half-bridge driver handling transients up to 60 V and meeting ISO 7637-2 pulse 5a requirements. Use Value: Sustains operation during cold-crank (6.5 V min) and load dump (60 V max) without external protection circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar half-bridge gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP6550GQ-Z | Higher 2 A peak drive, no integrated bootstrap diode, requires external bootstrap capacitor discharge path | Better suited for higher-frequency (>200 kHz) SMPS where faster edge rates are critical | Select MP6550GQ-Z when gate charge exceeds 40 nC or when tighter propagation delay matching is required |
| DRV8876NPRR | Includes integrated H-bridge MOSFETs (40 V, 3.6 A), no external shunt sensing, fixed OCP threshold (200 mV) | Targeted at lower-power (<100 W) applications where integration reduces board area more than cost | Choose DRV8876NPRR when system-level integration outweighs flexibility in MOSFET selection and current-sense calibration |
Compared with MP6550GQ-Z and DRV8876NPRR, the A89103KEVSR-3 uniquely balances external MOSFET flexibility, integrated bootstrap, and calibrated 100 mV current sensing-making it optimal for mid-power industrial motor drives where layout simplicity and accurate current limiting are prioritized over ultimate switching speed or full integration.
Availability
A89103KEVSR-3 is available at Aetrix Electronics and suitable for industrial motor control, battery-powered power tools, and automotive HVAC blower systems requiring stable component supply and long-term manufacturability.
Supply support for A89103KEVSR-3 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
Allegro MicroSystems designs and manufactures high-performance magnetic sensing and power IC solutions for automotive, industrial, and consumer markets, with global R&D and manufacturing operations.
The A89103KEVSR-3 belongs to Allegro's high-voltage gate driver product line, engineered specifically for reliable, high-current half-bridge control in harsh-environment motor and power conversion systems.
FAQ
What is the maximum operating frequency supported by the A89103KEVSR-3?
The A89103KEVSR-3 supports PWM frequencies up to 100 kHz with typical propagation delays of 250 ns (INH to HV) and 200 ns (INL to LV). Performance remains stable within datasheet limits up to this frequency, provided gate resistance and layout parasitics are minimized. The A89103KEVSR-3 does not specify guaranteed operation beyond 100 kHz, and higher frequencies may reduce noise margin or increase shoot-through risk without careful timing control.
Does the A89103KEVSR-3 require an external bootstrap capacitor?
Yes, the A89103KEVSR-3 requires an external bootstrap capacitor (typically 0.1 µF X7R ceramic) between HV and VS pins. Although it integrates a bootstrap diode, the capacitor is essential for sustaining high-side gate voltage during continuous conduction. The A89103KEVSR-3 datasheet specifies minimum capacitance and ESR limits to ensure reliable bootstrap recharge across temperature and duty cycle ranges.
Can the A89103KEVSR-3 drive both N-channel and P-channel high-side MOSFETs?
No, the A89103KEVSR-3 is designed exclusively for N-channel high-side MOSFETs in half-bridge configurations. Its high-side driver architecture relies on bootstrap operation, which requires the source node (VS) to periodically return near ground potential for capacitor recharge. Driving a P-channel device would violate this requirement and prevent proper gate biasing. The A89103KEVSR-3 cannot be used with P-channel high-side switches.
How is overcurrent protection configured on the A89103KEVSR-3?
The A89103KEVSR-3 implements fixed-threshold overcurrent protection at 100 mV across the SHUNT pin. This voltage is compared internally against a precision reference; no external resistors or configuration pins are needed. When exceeded, the FAULT pin pulls low and both gate drivers disable until the fault condition clears and INH/INL are toggled. The A89103KEVSR-3 does not support programmable thresholds or latched fault modes.
Is the A89103KEVSR-3 qualified for automotive applications?
The A89103KEVSR-3 is AEC-Q100 Grade 1 qualified (−40 °C to +125 °C ambient), with tested performance across automotive electrical transients including ISO 7637-2 Pulse 5a (load dump). It meets automotive EMC requirements per CISPR 25 Class 5 and supports functional safety concepts up to ASIL-B when used with appropriate system-level diagnostics. The A89103KEVSR-3 is approved for use in HVAC blowers, seat motors, and other chassis-critical non-steering applications.
A89103KEVSR-3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 28-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Optical Coupling
- Number of Channels:
- 2
- Voltage - Isolation:
- -
- Common Mode Transient Immunity (Min):
- -
- Propagation Delay tpLH / tpHL (Max):
- 400ns, 850ns
- Pulse Width Distortion (Max):
- -
- Rise / Fall Time (Typ):
- -
- Current - Output High, Low:
- -
- Current - Peak Output:
- -
- Voltage - Forward (Vf) (Typ):
- -
- Current - DC Forward (If) (Max):
- -
- Voltage - Output Supply:
- 4.5V ~ 85V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 150°C
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 28-QFN (6x6)
- Approval Agency:
- -
A89103KEVSR-3 FAQ
1.How can I place an order for A89103KEVSR-3 through Aetrix?
Please submit a Request for Quotation (RFQ) for A89103KEVSR-3 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 A89103KEVSR-3 reliable?
The price and inventory of A89103KEVSR-3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A89103KEVSR-3 is usually 5 days.
3.What payment methods are accepted for A89103KEVSR-3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A89103KEVSR-3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A89103KEVSR-3?
A89103KEVSR-3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A89103KEVSR-3 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 A89103KEVSR-3?
For technical support, including A89103KEVSR-3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A89103KEVSR-3 requirements.
6.How does Aetrix verify that A89103KEVSR-3 is sourced from the original manufacturer or authorized distributors?
All A89103KEVSR-3 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 A89103KEVSR-3 meets industry standards.
7.What is the process for return or replacement of A89103KEVSR-3?
All A89103KEVSR-3 units undergo pre-shipment inspection (PSI). If there is an issue with A89103KEVSR-3, 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 A89103KEVSR-3 part is unused and in its original packaging.
Return procedure for A89103KEVSR-3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
A89103KEVSR-3 Tags
.JPG)
-
TLP152(TPL,E
Toshiba Semiconductor and Storage
-
HT0740LG-G
Microchip Technology
-
FOD8314TR2
onsemi
-
1EDI60N12AFXUMA1
Infineon Technologies
-
1EDB7275FXUMA1
Infineon Technologies
-
UCC5350MCDR
Texas Instruments
-
2EDB7259KXUMA1
Infineon Technologies
-
UCC5304DWVR
Texas Instruments
-
SI8261BBC-C-ISR
Skyworks Solutions Inc.
-
HT0440LG-G
Microchip Technology
-
HCPL-0302-500E
Broadcom Limited
-
STGAP2HSCMTR
STMicroelectronics
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
