
Full bridge controller for automotive brushed DC motors
Infineon Technologies has launched a full bridge controller for brushed DC motors in automotive applications.
The Motix Bridge BTM90xx family of full-bridge/ H-bridge controllers are optimised for applications such as door, mirror, seat, body and zone control modules. Accompanying safety documentation is available to allow the controller to be used in other industrial safety applications.
The BTM90xx family is characterized by a high functionality to enable intelligent and tiny motor control solutions. The devices, with a supply voltage range for normal operation of 7 V to 18 V and an extended range of 4.5 V to 40 V include protection and diagnostic functions such as overtemperature, undervoltage, overcurrent, cross-current or short-circuit detection.
Currents are measured for both the high-side and low-side switches and the devices are suitable for automotive applications with a current limit of at least 10 A (BTM901x) or 20 A (BTM902x). PWM operation is possible for frequencies up to 20 kHz.
The BTM9011EP and BTM9021EP are SPI variants and support pin-saving daisy chain function to help reduce overall system costs. BTM9021 in addition features an integrated watchdog. The BTM90xx’s tiny TSDSO-14 (4.9 x 6.0 mm) package reduces the overall PCB board space required and features a large exposed pad that simultaneously improves the device’s thermal performance.
To simplify the evaluation and design-in process for MOTIX BTM90xx, Infineon also provides a comprehensive support package, including technical product documentation, simulation models, a tool for calculating power dissipation, evaluation boards and Arduino example code. In addition a device driver and the Full Bridge Configuration Wizard are available for free at the Infineon Developer Centre (IDC).
The MOTIX devices BTM9010EP, BTM9011EP, BTM9020EP and BTM9021EP can be ordered now.
Further information is available at www.infineon.com/BTM90xx.
