STSPIN240 vs TB6612FNG,C,8,EL: Motor Driver IC Comparison for Hardware Engineers

Quick verdict

For compact, thermally demanding applications running 1–1.3 A loads with fault protection, the STSPIN240 offers a more robust, thermally capable solution with integrated current limiting and short-circuit protection. For simpler, lower current (up to 1 A) DC motor control with parallel interface and slightly higher voltage range, the TB6612FNG,C,8,EL is a cost-effective, widely used choice, especially in hobbyist or moderate industrial designs.

Spec comparison table

SpecSTSPIN240TB6612FNG,C,8,ELNotes
ApplicationsDC Motors, General PurposeGeneral PurposeBoth target DC motors; STSPIN240 explicitly calls out inductive loads, which matters for motor drivers.
Current output per channel1.3 A1 ASTSPIN240 supports 30% higher continuous current, better for higher power motors.
Peak currentNot specifiedNot specifiedNeither datasheet specifies peak current ratings; assume similar or limited by continuous rating.
Fault protectionCurrent limiting, over temperature, short circuitNone specifiedSTSPIN240 integrates protective features; TB6612FNG lacks explicit fault protections.
InterfacePWMParallelSTSPIN240 uses PWM input, TB6612FNG uses parallel inputs; affects MCU pin count and control complexity.
Load typeInductiveBrushed DCSTSPIN240 targets inductive loads explicitly, aligning with DC motor operation, TB6612FNG is general brushed DC.
Mounting typeSurface mountSurface mountBoth are surface mount, no difference.
Operating temperature range-40°C to 150°C (junction)-20°C to 85°C (ambient)STSPIN240 supports wider and higher temperature range, better for harsh environments.
Output configurationHalf bridge (4)Half bridge (4)Both have 2 half bridges (4 MOSFETs total), suitable for one DC motor or one coil of a stepper.
Package case16-VFQFN (3x3 mm) with exposed pad24-SSOP (5.6 mm width)STSPIN240’s smaller footprint and exposed pad facilitate better thermal dissipation and compact design.
RDS(on) typical400 mΩ (LS + HS)Not specifiedSTSPIN240 provides RDS(on) data; lower RDS(on) improves efficiency and reduces heat. TB6612FNG datasheet does not specify.
TechnologyPower MOSFETPower MOSFETBoth use integrated power MOSFETs.
Voltage load range1.8 V to 10 V2.5 V to 13.5 VTB6612FNG supports higher maximum load voltage, useful for 12 V motor applications.
Voltage supply range0 V to 5 V2.7 V to 5.5 VSTSPIN240 supports lower minimum supply voltage, advantageous for low-voltage logic integration.

Design trade-offs

The STSPIN240’s higher continuous current rating (1.3 A vs 1 A) and integrated fault protections (current limiting, overtemperature, short circuit) make it a better fit for designs where reliability and thermal performance are critical. Its 16-VFQFN package with exposed pad enables more efficient heat sinking on compact boards, allowing tighter layout and simpler thermal management. This is important when running motors near the upper current limits or in elevated ambient temperatures.

The TB6612FNG,C,8,EL’s 24-SSOP package is physically larger and lacks an exposed thermal pad, which complicates thermal design for continuous high current. Its maximum load voltage of 13.5 V is advantageous for common 12 V motor applications, but it comes with a narrower ambient temperature range (-20°C to 85°C vs STSPIN240’s -40°C to 150°C junction rating), limiting its use in harsh environments or automotive-grade applications.

Interface-wise, the STSPIN240’s PWM input interface reduces microcontroller pin count and allows straightforward speed control via duty cycle modulation. In contrast, the TB6612FNG uses a parallel interface that requires more control signals, which may increase firmware complexity and board routing but can allow more direct control of motor states without PWM modulation.

The STSPIN240’s typical RDS(on) of 400 mΩ (combined low-side + high-side) suggests moderate conduction losses; while the TB6612FNG datasheet does not specify RDS(on), it is known from typical designs to be in a similar range or slightly higher, which may translate into marginally higher power dissipation. Without explicit RDS(on) data, conservative thermal design is recommended for the TB6612FNG.

In terms of cost and availability, the TB6612FNG is a mature, widely adopted motor driver found in numerous consumer and educational products, typically available at lower unit cost and in higher volume. The STSPIN240, with its more advanced protection and thermals in a smaller footprint, may come at a premium but reduces external component count and increases system robustness.

Use-case fit

Choose STSPIN240 when…

Choose TB6612FNG,C,8,EL when…

Drop-in compatibility

No evidence from the provided datasheets suggests pin or footprint compatibility between the STSPIN240 and TB6612FNG,C,8,EL. The STSPIN240 is in a 16-pin VFQFN (3x3 mm) package with exposed pad, while the TB6612FNG is housed in a larger 24-pin SSOP package. Their control interfaces differ (PWM vs parallel), so substituting one for the other would require redesigning PCB footprint, control firmware, and possibly power stage layout. Therefore, these parts are not drop-in replacements.

Alternatives to consider