DEMOBOARDBTN8962TATOBO1 Infineon

NovalithIC H-Bridge Demo Board Version 2.2 (BTN89xxTA) Demo Board Description V1.0, 2011-09-23 Automotive Power NovalithIC H-Bridge Demo Board Version 2.2 (BTN89xxTA) General Description Figure 1 Demo board (top view) 1 General Description The NovalithIC H-Bridge/Dual-Halfbridge Demo Board contains two NovalithICs used as two half-bridges or in a typical H-bridge configuration including peripheral components and reverse polarity protection. Control signals can be supplied via a 26 pin header connector. The board is suitable for all members of the NovalithIC family (BTN89xxTA). 1.1 Layout Considerations Special care has been taken to the PCB layout to minimize stray inductances in the power bridge design as it is necessary in all switched high power bridges. The NovalithIC has no separate pin for power ground and logic ground. Therefore it is recommended to assure that the offset between the ground connection of the slew rate resistor, the current sense resistor and ground pin of the device (GND / pin 1) is minimized. The voltage offset between the GND pins of the two half bridges should be small as well. In this board this is achieved by positioning the two NovalithICs in a way that the GND pins are facing each other and by routing the high current traces from the 470F supply capacitor to the bridges so that the area spanned by the loop is as small as possible. A ceramic capacitor from VS to GND close to each half bridge is implemented to provide current for the switching phase via a low inductance path and therefore reducing noise and ground bounce. The digital inputs are protected from excess currents (e.g. caused by induced voltage spikes) by 10 k series resistors. Demo Board Description 3 V1.0, 2011-09-23