Choosing a driver IC is both a circuit-design decision and a supply-chain decision. A part can meet a headline voltage or current rating and still be unsuitable if its control interface, protection behavior, package, thermal path, qualification, lifecycle, or traceability does not match the product.
This guide gives design engineers, procurement teams, and quality teams a common screening method for LED drivers, motor drivers, and MOSFET/IGBT gate drivers. Exact limits must always be checked against the data sheet for the quoted manufacturer part number (MPN).
Key Takeaways
- Separate logic supply, power-stage supply, and load voltage before comparing parts.
- Select an LED driver by topology, regulated current, dimming behavior, efficiency, and fault protection.
- Select a motor driver by motor type, continuous and peak current, current-control method, voltage range, and thermal limits.
- Select a gate driver by topology, source/sink current, propagation delay, UVLO, isolation or CMTI needs, and switching conditions.
- Treat package, PCB copper, thermal vias, assembly capability, and inspection method as one manufacturing decision.
- For an RFQ, request the exact MPN, data-sheet revision, lifecycle status, date-code and lot traceability, certificate of conformance, compliance documents, and approved alternatives.
Driver IC Families at a Glance
| Driver family | Main controlled element | Core selection questions |
|---|---|---|
| LED driver | LED current and brightness | What topology, regulated current, dimming performance, and fault response are required? |
| Motor driver | Motor phase or winding current | What motor type, continuous/peak current, control method, and stall behavior are required? |
| Gate driver | MOSFET, IGBT, SiC, or GaN gate charge | What topology, source/sink current, delay, dead time, and isolation requirement are needed? |
These groups are not interchangeable. The manufacturer category pages from Texas Instruments’ LED driver portfolio, motor driver portfolio, and gate driver portfolio show the different parameters used to specify each family.
LED Driver IC Selection
An LED driver regulates current rather than simply supplying a nominal voltage. Select a linear, buck, boost, or buck-boost topology from the input-voltage range, LED-string voltage, regulated current, efficiency target, and thermal allowance.
LED current, dimming, and protection
Record the regulated LED current, current-sense tolerance, channel matching, PWM frequency, analog-dimming range, minimum pulse width, and dimming ratio. For camera or machine-vision lighting, check PWM edge timing and synchronization rather than relying on a generic “flicker-free” claim.
Review open-LED, short-LED, over-temperature, input under-voltage, over-voltage, and current-limit behavior. Confirm whether a fault latches, retries, or automatically recovers, and whether the device reports a fault to the host processor.
For automotive lighting, identify the vehicle system voltage (12 V, 24 V, or 48 V as applicable), transient requirements, temperature grade, and qualification evidence. A nominal 12 V label alone is not a sufficient automotive design specification.
Motor Driver IC Selection
Motor type and operating profile
State the motor type and operating profile in the RFQ:
- Brushed DC: VM range, continuous current, start/stall current, PWM frequency, current recirculation, and braking behavior.
- Stepper: phase current, microstepping resolution, decay mode, step rate, stall detection, and winding resistance/inductance.
- BLDC/PMSM: number of phases, commutation or FOC method, position feedback, peak phase current, and required MOSFET or power-stage configuration.
Current, voltage, heat, and diagnostics
Use the motor’s start, acceleration, stall, and braking conditions—not only its steady-state current. Check continuous and peak current limits, current-regulation accuracy, power-stage voltage rating, MOSFET on-resistance (if integrated), switching frequency, and thermal shutdown behavior.
Confirm PWM or step/direction input, SPI or I2C configuration, current-sense options, fault pins, stall or open-load diagnostics, and reset behavior. The motor supply and logic supply may have different ranges and must be specified separately.
Gate Driver IC Selection
Power-switch technology and topology
Specify whether the driver controls silicon MOSFETs, IGBTs, SiC MOSFETs, or GaN devices. Then define low-side, high-side, half-bridge, full-bridge, isolated, or multi-channel operation.
Gate-drive timing and protection
Record peak source current, peak sink current, supply range, propagation delay, channel-to-channel delay matching, rise/fall time, dead-time control, and maximum switching frequency. Match gate-drive strength to total gate charge, switching loss, EMI limits, and the desired transition time—not to a peak-current number alone.
For a practical introduction to these trade-offs, see Texas Instruments’ Fundamentals of MOSFET and IGBT Gate Driver Circuits.
For bootstrap high-side drivers, check bootstrap voltage range, duty-cycle limits, refresh requirements, and minimum pulse width. For isolated drivers, check isolation rating, common-mode transient immunity (CMTI), propagation delay, and creepage/clearance requirements. Also verify UVLO, desaturation or over-current protection, Miller-clamp behavior, soft turn-off, and fault reporting.
Package, Thermal, and Assembly Selection
Package selection combines electrical parasitics, heat flow, board space, inspection, and manufacturing capability.
| Package | Advantages | Constraints to verify |
|---|---|---|
| QFN/DFN | Small footprint, short connections, and optional exposed pad | Land pattern, thermal-via design, voiding, coplanarity, and inspection |
| SOIC/TSSOP | Surface-mount package with visible gull-wing leads and familiar assembly | Lead pitch, board area, package thermal resistance, and lead-form limits |
| QFP | Many pins with visible leads that are easy to inspect | Larger footprint, lead coplanarity, and board-flex sensitivity |
| BGA/CSP | High routing density and compact package size | Hidden joints, X-ray inspection, fabrication tolerance, rework, and thermal paths |
SOIC and TSSOP are surface-mount packages; neither is a through-hole alternative. Thermal values such as θJA are test-board dependent, so use the selected device’s data sheet and layout guidance rather than the package name as a thermal guarantee.
QFN and exposed-pad packages
A quad flat no-leads IC suits a space-constrained layout, especially where short paths provide low inductance.
- Board fit
- surface mount construction saves room.
- A thermal pad moves heat toward the PCB.
- Dense design
- high-density PCB routing keeps compact LED driver circuits tidy.
QFP packages for high pin counts
QFP packages offer visible leads and can be practical where pin count, inspection access, and board area are balanced.
- A quad flat package supports high pin count control.
- Visible gull-wing leads simplify solder inspection.
- Confirm lead coplanarity, board-flex exposure, solder-joint reliability, and the data-sheet thermal conditions for the intended product.
SOIC packages for familiar surface-mount assembly
The small outline integrated circuit remains a practical LED driver IC choice.
- Assembly
- gull-wing pins aid manual soldering.
- A standard footprint speeds prototyping.
- Service
- SOIC is a surface-mount package with visible leads; use a DIP or another specified package when through-hole assembly is required.
TSSOP packages for low-profile boards
- thin shrink small outline package construction delivers a low profile.
- Its fine pitch supports space-saving boards.
- Package choice does not determine efficiency; verify the IC loss, copper area, and thermal resistance at the intended current and duty cycle.
BGA and CSP packages for dense routing
A ball grid array uses hidden solder balls beneath the IC.
- Performance
- Short connections improve electrical performance.
- A multi-layer substrate supports dense routing.
- Heat
- Thermal performance depends on the device die, package construction, PCB stack-up, copper area, and airflow; BGA is not automatically the best thermal option.
RFQ fields, thermal requirements, and compliance
Use a separate RFQ field for every electrical, thermal, mechanical, and documentation requirement. That prevents a supplier from interpreting a request for a “24 V driver” as a complete specification.
Supply rails, load voltage, and transients
State the logic supply, power-stage supply, load voltage, minimum/nominal/maximum values, and expected transients separately. A low-voltage logic rail, a motor or LED supply, and a gate-driver supply are different design constraints.
| Requirement | Information to provide |
|---|---|
| Logic supply | Minimum, nominal, maximum, logic thresholds, and reset behavior |
| Power-stage supply | Minimum, nominal, maximum, start-up behavior, and transient range |
| Load | LED string, motor type, or switch type; impedance/inductance or gate charge; continuous and peak current |
| Thermal environment | Ambient range, enclosure, duty cycle, PCB copper area, airflow, and maximum junction temperature |
Control interface and diagnostics
- Pick the control interface around the exact device and board needs:
- Serial Peripheral Interface: high Data rate, short links.
- I2C bus: fewer wires and addressed devices.
- CAN bus: normally a system network interfaced through a CAN transceiver or controller; only specify it when the selected device actually integrates that function.
- Check the Bus interface, PWM, UART, diagnostics, and Master-slave behavior before locking in the driver IC.
Temperature, package, and thermal verification
- Compare Operating temperature with actual ambient extremes.
- Check Commercial grade and Industrial grade ratings.
- For automotive projects, check the actual automotive qualification and temperature grade stated for the exact MPN.
- Validate junction temperature, thermal resistance, PCB copper, airflow, duty cycle, and resulting thermal performance under the intended load.
Load-specific performance fields
- Define the load.
- An LED driver prioritizes Current regulation and PWM dimming.
- A motor driver needs motor type, continuous/peak current, current-regulation method, and stall/braking behavior.
- A gate driver needs switch technology, topology, source/sink current, delay, dead time, and isolation or CMTI requirements. Gate, LED, and motor drivers are not drop-in substitutes because a package is similar.
Qualification, quality systems, and compliance
These items answer different questions and should not be treated as equivalent certificates.
- Automotive:
- AEC-Q100
- Manufacturer qualification evidence for the exact device and grade
- Manufacturing:
- ISO 9001
- Organization-level quality-management-system evidence; it does not qualify an individual IC
- Product safety:
- The applicable product or component standard, file number, and conditions of acceptability
For environmental requirements, request a current manufacturer RoHS/REACH declaration for the exact quoted MPN. For automotive projects, also clarify PPAP, IATF 16949 supplier controls, PCN/PDN notification, and the approved-vendor process.
Driver IC vs. Discrete Components
Choosing between an integrated driver and discrete components affects development time, BOM complexity, thermal design, and supply-chain risk.
| Decision factor | Integrated driver IC | Discrete implementation |
|---|---|---|
| Development time | Usually shorter because control, protection, or power devices are integrated | More design and validation work |
| Flexibility | Limited to the device architecture and ratings | Greater freedom to select switches, sensing, timing, and protection |
| BOM and assembly | Often fewer line items, but one IC can become a single-source risk | More line items and placement effort |
| Thermal design | Must follow the IC package and PCB limits | Heat can be distributed, but more junctions and interfaces must be checked |
| Supply-chain risk | Check lifecycle, alternates, and allocation risk for the exact MPN | Check availability and matching of every critical transistor, diode, and controller |
An integrated IC is not automatically lower cost, and a discrete design is not automatically more reliable. Compare total cost, validation time, board area, efficiency, and lifecycle risk.
Driver IC Sourcing Workflow
- Freeze the requirement: release the electrical, thermal, mechanical, control, compliance, and validation fields above.
- Create an approved MPN list: record manufacturer, exact ordering code, package suffix, temperature grade, data-sheet revision, and lifecycle status.
- Screen lifecycle risk: check active/NRND/EOL status, last-time-buy information, PCN/PDN history, and manufacturer-recommended replacements.
- Verify the supply chain: request manufacturer, date code, lot number, country of origin where required, packaging photos, certificate of conformance, and traceability records.
- Validate samples: test the exact MPN under the same voltage, load, frequency, temperature, and fault conditions used for approval.
- Control alternates: document whether an alternate requires a PCB, firmware, magnetics/filter, thermal, or compliance change.
For a multi-line BOM, buyers can review the Driver IC product category, BOM kitting service, Technical Advisor, and Quality Assurance pages. Send the completed RFQ and validation requirements through the Contact page. For obsolete or allocated parts, use the hard-to-find and obsolete sourcing service.
Frequently Asked Questions
Can an LED, motor, and gate driver be substituted because the package is the same?
No. Pinout, supply domains, control protocol, protection behavior, thermal limits, and switching requirements must all match. A similar package is not evidence of drop-in compatibility.
Is a higher current rating always better?
No. Check test conditions, current duration, switching frequency, PCB thermal path, current-limit behavior, and efficiency. A higher headline rating can require a different package or external circuit.
Does ISO 9001 prove that a driver IC is automotive qualified?
No. ISO 9001 describes an organization’s quality-management system. Automotive IC qualification and product-level supplier controls require separate evidence.
What should be checked before approving an alternate MPN?
Compare electrical limits, pinout, package and land pattern, firmware interface, protection timing, thermal performance, compliance documents, lifecycle status, and sample results. Treat an alternate as a new validation item unless equivalence is documented.
Which documents should a supplier provide for a production quote?
Request the current data sheet, exact MPN, manufacturer and date-code information, certificate of conformance, traceability records, lifecycle/PCN information, applicable RoHS/REACH declarations, and required automotive or safety qualification evidence.
Technical References
- Texas Instruments, LED Drivers overview.
- Texas Instruments, Motor Drivers overview.
- Texas Instruments, Gate Drivers overview.
- Texas Instruments, Fundamentals of MOSFET and IGBT Gate Driver Circuits.
- Automotive Electronics Council, AEC-Q100 document.
- International Organization for Standardization, ISO 9001:2015 standard record.
- European Commission, RoHS Directive.
Conclusion
The best driver IC is the one that meets the complete electrical, thermal, mechanical, qualification, and supply-chain requirement under the same conditions used for validation. Start with the load and operating profile, separate logic and power rails, then compare exact MPNs rather than broad product labels.
Before placing a production order, confirm lifecycle status, traceability, compliance documents, approved alternatives, and sample-test results. This process reduces redesign risk and gives engineering, purchasing, and quality teams a specification they can verify together.
