DRV8316 and DRV8323 represent two different ESC integration strategies. DRV8316 combines a three-phase power stage, current sensing, and power-management features for compact lower-power motors. DRV8323 drives external MOSFETs, giving the designer more freedom to scale current and thermal performance at the cost of PCB area and validation work.
Side-by-side design view
| Criterion | DRV8316 | DRV8323 |
|---|---|---|
| Power stage | Integrated three-phase FETs | External N-channel MOSFETs |
| Voltage class | 4.5–35 V operating, 40 V abs max | Up to 65 V gate-driver class |
| Peak current | Up to 8 A device peak | Set by MOSFETs, layout and thermal design |
| Current sensing | Integrated sensing | Three current-shunt amplifiers |
| Best fit | Compact actuator, fan or small propulsion node | Higher-power ESC with custom power stage |
Start with the aircraft power envelope
Battery voltage is not the only electrical limit. Include charged-pack voltage, regenerative events, cable inductance, braking, hot-plug transients, propeller inertia, blocked-rotor current, and the duration of fault energy. The absolute maximum rating is not an operating target.
Measure phase current and switching-node behavior on the real motor and propeller. Bench supplies and unloaded motors can hide commutation stress, desaturation, current-reconstruction errors, and thermal peaks that appear in flight.
When integrated FETs are the simpler answer
TI specifies DRV8316 as a 40 V absolute-maximum, 8 A peak three-phase driver with integrated FETs and current sensing. It reduces external components and loop area, which can simplify compact actuators, cooling fans, gimbals, pumps, and lower-power propulsion nodes.
The integration ceiling is also the design boundary. Verify continuous current at the real copper area and ambient temperature, not only peak current. Thermal shutdown is protection after the margin is gone, not a substitute for heat design.
When an external MOSFET stage is justified
DRV8323 is a three-phase gate driver for external N-channel MOSFETs and includes current-shunt amplifiers and protection functions. The designer can choose FET voltage, resistance, gate charge, package, parallel count, and cooling for a wider range of ESC power levels.
That freedom adds gate-loop, dead-time, dv/dt, current-shunt, ground-bounce, thermal-sharing, and protection-tuning work. Validate every approved MOSFET alternative; a nominally similar device can change switching loss and EMI.
Release and procurement controls
Run startup, rapid throttle steps, braking, blocked rotor, phase loss, undervoltage, overvoltage, overtemperature, short-circuit, sensor failure, and MCU reset tests. Confirm that every fault response leaves the aircraft in the intended safe state.
Freeze the complete driver suffix, interface option, package, current-sense method, MOSFET list, shunt tolerance, gate components, regulator settings, assembly profile, and thermal acceptance limits before sourcing substitutes.
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Submit a UAV chip RFQFrequently asked questions
Is DRV8316 suitable for every drone motor?
No. Its voltage, current, thermal, and integrated-FET limits must match the measured motor and propeller load.
Why use DRV8323 with external MOSFETs?
External MOSFETs let the designer scale voltage, current, resistance, switching loss, package, and cooling.
Can an 8 A peak rating be used continuously?
No. Continuous current depends on switching conditions, PCB copper, airflow, ambient temperature, and thermal limits.
Official technical references
Specifications must be confirmed in the latest manufacturer datasheet for the exact orderable suffix.