STMicroelectronics STSPIN830 and STSPIN840 single-chip motor drivers

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Simplifying the design of low- to mid-power motor controls in the 7–45 V range, the STSPIN830 and STSPIN840 single-chip drivers from STMicroelectronics contain flexible control logic and low-RDS_(ON) power switches for industrial applications, medical technology and home appliances.

The STSPIN830 for driving three-phase brushless DC motors has a mode-setting pin that lets users control the three half bridges of the integrated power stage with direct U, V and W pulse-width modulated (PWM) inputs, or by applying signals to each gate individually for higher control flexibility. A dedicated sense pin for each inverter leg simplifies setting up three-shunt or single-shunt current sensing for field-oriented control (FOC).

The STSPIN840 can drive two brushed DC motors or one larger motor leveraging ST’s paralleling concept, which allows the integrated full bridges to be configured as two separate bridges or as a single bridge using the two sets of MOSFETs in parallel for lower RDS_(ON) and higher current rating.

Both drivers contain rich features, including PWM current-control circuitry with adjustable off-time, a convenient standby pin for power saving and protection circuitry including non-dissipative overcurrent protection, short-circuit protection, undervoltage lockout, thermal shutdown and interlocking to help create robust drives.

The integrated power stage of each device features ST MOSFETs with low RDS_(ON) of 500 mΩ to combine high efficiency with economy. The option to use the output bridges individually or connected in parallel, in the STSPIN840, helps trim the BOM for multimotor applications.

With their high-feature integration and flexibility, the drivers enable compact controls for industrial, robotic, medical, building-automation and office-equipment applications. The STSPIN830 is suitable for factory-automation end-points, home appliances, small pumps and fans for computer or general-purpose cooling. The STSPIN840 targets ATM and money-handling machines, multi-axis stage-lighting mechanisms, thermal printers, textile or sewing machines, and vending machines.

For more information: www.st.com/stspin.