The STSPIN830 and STSPIN840 single-chip drivers for low- to mid-power motor controls target industrial, home appliance, building automation, and medical applications

By
Heather Hamilton, contributing writer

STMicroelectronics recently
launched the STSPIN830 and STSPIN840, a series of low- to mid- power motor controls in the 7-V to 45-V
range. The single-chip drivers come complete with low-RDS(ON) power switches and contain flexible control logic. The devices are
well-suited for industrial applications, home appliances, and medical
technology.
 

With a mode-setting pin that allows users to
control the three half-bridges of the integrated power stage with direct U, V,
and W pulse-width modulated inputs, the STSPIN830 for driving three-phase
brushless DC motors also allows users to apply signals to individual gates,
making it highly flexible. There is also a dedicated sense pin for each
inverter leg designed to make it easy to set up three-shunt or single-shunt
current sensing for field-oriented control.

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

 

The pair of drivers contain PWM
current-control circuitry with adjustable off-time, a standby pin that will
allow for power saving, and circuitry with protection to include
non-dissipative overcurrent protection, short-circuit protection, under-voltage
lockout, thermal shutdown, and interlocking. 

 

The device’s integrated power stage comes with
MOSFETs with low RDS(ON) of only 500 mΩ, which STMicroelectronics
said makes them efficient and economical. The STSPIN840 also allow a user to
trim the bill of materials for multi-motor applications thanks to the
capability of using the output bridges individually or connected in parallel.

Target applications include industrial,
robotics, medical, building automation, and office equipment. The STSPIN830 is
suited for factory automation end points, home appliances, small pumps, and
fans for computer and general cooling, while the STSPIN840 targets ATM and
other money machines, multi-axis stage lighting mechanisms, thermal printers,
textile and sewing machines, and vending machines.
Both devices (4 x 4 mm QFN) are in production.
Pricing for both starts at $1.25 for orders of 1,000.