2.8 Ω (Typ) Quad H-Bridge Motor Driver

The 34920 is a multifunctional analog ASIC. The 34920 integrates two circuits, four H-bridge drivers, a reset circuit in a single IC, and two DC/DC switching voltage regulators. Input voltage is 21 V to 42 V DC.

Each motor of the two driver blocks can be configured as either a DC motor driver with pulse width modulation (PWM)-control or a single bipolar step motor driver. In step motor mode, both drivers are capable of being operated in the quarter step mode.

In DC motor mode, both bridges in a driver are in parallel, providing 2.4 A of drive current. In step motor mode, each bridge in a driver drives one phase. Each phase is driven with a bipolar current mode drive.

Features

• Individual Thermal Limit Protection

• User-Selectable Motors: 2 DC Motors (2.4 A / Motor), 2 Step Motors (W1-2 Phase Control), 1 DC Motor and 1 Step Motor

• 2 Buck Regulators (Switching @ 200 kHz)

• VV2 Output Voltage Is Programmable to 10 V to 15 V DC (Externally Set)

• Low-Voltage Detection Reset (VV1 and VVB+)

• Pb-Free Packaging Designated by Suffix Code EI