The LV8714TA is an extremely energy efficient dual stepper motor driver with operating voltages ranging from 4 to 16.5 V. Featuring constant current control for its on-chip quad H-bridge channels, this device is capable of driving two stepper or four DC motors independently. The device’s power FETs with total on-state resistance of only 0.9Ω for one leg and synchronous rectification type switching allow its power consumption to be kept to a minimum while not in full operation. The device supports a low power saving mode with ultra-low standby current (less than 1µA) to minimise power consumption when in idle state. The proprietary internal current sense mechanism ensures loss-less current measurement without any external power resistor, thus enhancing the energy efficiency of the system solution.
On-chip regulators enable single supply operation of the device and lower the system solution footprint. Supporting an operating ambient temperature range of -20 to +85°C, the LV8714TA can cope with the most demanding needs of industrial environments. It has built-in thermal shutdown, low-voltage shutdown and over-current protection mechanisms that enable a highly reliable system solution. Among the wide variety of applications that this device addresses are security camera systems, point of sale (PoS) terminals, document scanners and multi-function printers.
The LV8714TA is offered in a 9x9mm 48-pin TQFP package and is priced at $2.99 each in 10,000 unit quantities.
Also being unveiled at electronic are the STK5Q4U352J-E and STK5Q4U362J-E 600V IPMs with an internal bootstrap circuit for high side gate drive. The IGBT/FRD modules are claimed to deliver a single control power supply due to the internal bootstrap circuit. All control inputs and status outputs are at low voltage levels, to make them directly compatible with widely-used system microcontrollers. Under-voltage protection and trip input for shutdown are included. Peak output current is 16A (STK5Q4U352J-E) and 20A (STK5Q4U362J-E). The compact, DIP modules for high voltage, three-phase motor drives can be used inair conditioning, industrial motor control, washing machine, dish washer and refrigerator designs.
The STK5Q4U352J-E and STK5Q4U362J-E are is offered in 18.2×29.6mm DIP modules, priced at $5.80 and $6.00, respectively, in 10,000 unit quantities.
