New Motor Drivers Deliver Simplicity with Flexibility for Low- to Mid-Power Applications


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STSPIN830 and STSPIN840 single-chip motor drivers

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


The STSPIN830 can be used for driving 3-phase brushless DC motors and has a mode-setting pin that allow users control the three half-bridges of the integrated power stage with direct U, V, and W PWM inputs, or by applying signals to each gate individually for higher control flexibility. It also has a dedicated sense pin for each inverter leg to simplify setting up three-shunt or single-shunt current sensing for Field-Oriented Control (FOC).


The STSPIN840 drives two brushed DC motors or one larger motor using 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.


With features such as - 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; both the drivers help designers create robust and reliable drives.


Both the devices has integrated power stage which features MOSFETs with low RDS(ON) of only 500mΩ to combine high efficiency with economy. Moreover the option of using the output bridges connected or parallel can reduce the overall cost of BOM in multi-motor applications. With their high feature integration and flexibility, they can be used in compact and cost-effective control for industrial, robotic, medical, building-automation, and office-equipment applications. While the STSPIN830 is suitable for factory-automation end-points, home appliances, small pumps, and fans for computer or general-purpose cooling, the STSPIN840 is intended to be used in ATM and money-handling machines, multi-axis stage-lighting mechanisms, thermal printers, textile or sewing machines, and vending machines.


Both STSPIN830 and STSPIN840 are currently in production as 4mm x 4mm QFN devices, and their pricing starts from $1.25 for orders of 1000 pieces.

Two STM32 Nucleo expansion boards are provided to facilitate product evaluation and build functional prototypes using the STM32 Open Development Environment: X-NUCLEO-IHM16M1 for the STSPIN830 and X-NUCLEO-IHM15A1 for the STSPIN840, both priced at $16.

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