Toshiba releases automotive gate driver IC for brushed DC motors
Toshiba has commenced the mass production of the AEC-Q100 qualified TB9103FTG MOSFET gate driver IC, featured in Toshiba’s recent motor control reference design for driving automotive brushed DC motors. This control board demonstrates how the TB9103FTG can enable more compact system designs in latch and lock motor applications that do not require speed control.
TB9103FTG provides the flexibility to function as either a single-channel H-bridge or two half-bridge channels gate driver. When paired with an external MOSFET, it can be used to replace mechanical relays, thereby improving equipment reliability by reducing mechanical wear and tear. Its low standby current further contributes to minimising power consumption in the sleep mode. The device has a built-in charge pump circuit for controlling the gate voltage of the external MOSFETs driving the motors. Additionally, a gate monitoring feature safeguards against through-current by dynamically adjusting the gate signal’s output timing for both high-side and low-side MOSFETs.
The TB9103FTG gate driver operates in temperatures ranging from -40 to +125°C and is housed in a space-saving VQFN24 package measuring 4.0×4.0mm.
Using Toshiba’s RD245 reference design, a brushed DC motor can be controlled either by manually adjusting the switches on the board or else by using an external microcontroller (MCU). This compact reference design board also supports testing of Toshiba’s 10A XPN7R104NC and 20A XPH3R304PS power MOSFETs for motor driving. It features a reverse polarity protection circuit implemented using the XPH1R104PS power MOSFET, while the TB9005FNG 5V voltage regulator IC enables this design to operate from a wide 8V to 18V input voltage range.
