Flexible motor drivers target low and mid-power applications
The STSPIN830 and STSPIN840 single-chip drivers from STMicroelectronics contain flexible control logic and low-RDS(ON) power switches for designs in the 7V-45V range.
The STSPIN830 is intended for driving 3-phase brushless DC motors with 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). IT is aimed at factory-automation end-points, home appliances, small pumps, and fans for computer or general-purpose cooling.
The STSPIN840 can drive two brushed DC motors or one larger motor by using ST’s paralleling topology that 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 and so is aimed at ATM and money-handling machines, multi-axis stage-lighting mechanisms, thermal printers, textile or sewing machines and vending machines.
Both devices include PWM current-control circuitry with adjustable off-time, 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 and reliable drives.
The integrated power stage of each device features ST-proprietary MOSFETs with low RDS(ON) of 500mΩ. The option to use the output bridges individually or connected in parallel, in the STSPIN840, helps trim the BOM for multi-motor applications.With their high feature integration and flexibility, the drivers enable more compact and cost-effective controls for industrial, robotic, medical, building-automation, and office-equipment applications. The STSPIN830 is ideal for The STSPIN840
Two STM32 Nucleo expansion boards help with product evaluation and building functional prototypes using the STM32 Open Development Environment. The X-NUCLEO-IHM16M1 is used for the STSPIN830 and X-NUCLEO-IHM15A1 for the STSPIN840, and both are priced at $16.
The STSPIN830 and STSPIN840 are both in production now, as 4mm x 4mm QFN devices. Pricing for both starts from $1.25 for orders of 1000 pieces.
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