Motor Driver IC for Engines

November 10, 2015

Ryan Gehm

Toshiba America Electronic Components, Inc. has released a small-sized motor driver IC for brushed dc motors used in vehicle engine applications such as electronic throttles and valve controls. The new TB9051FTG, housed in a flat 6- x 6-mm (0.24- x 0.24-in) P-QFN28 package, employs double-diffused MOSFET (DMOS FET) transistors as driver circuits. These devices do not require base current biasing, so they have virtually no input current, which lets them process high current density per device area with low on-resistance. The new motor driver ICs have the flexibility to enable control of a range of automotive electronics—not only engine applications, which are the primary target, but also other onboard systems such as wing mirrors and trunk locks, operating at up to 5 A. The TB9051FTG features a single, H-bridge channel and on-resistance of 0.34 ohm (H-side + L-side, max). Its two power supplies, VBAT and VCC, operate at 4.5 to 28 V and 4.5 to 5.5 V, respectively. Control functions include motor-related (forward, reverse, brake), as well as PWM control, current limit control, H-side current monitor, diagnosis output, and power-on-reset circuit. Built-in detection circuits include over current, over heat, and low/high voltage. Sample shipments started in September 2015, with mass production scheduled to start in October 2016.