VNH5019A-E

描述

The VHN5019A-E is a full bridge motor driver intended for a wide range of automotive applications. The device incorporates a dual monolithic high-side drivers and two low-side switches. The high-side driver switch is designed using STMicroelectronics’ well known and proven proprietary VIPower^® M0 technology that allows to efficiently integrate on the same die a true Power MOSFET with an intelligent signal/protection circuit.

The three dice are assembled in a MultiPowerSO-30 package on electrically isolated lead-frames. This package, specifically designed for harsh automotive environments offers improved thermal performance thanks to exposed die pads. The input signals IN_A and IN_B can directly interface the microcontroller to select the motor direction and the brake condition.

The DIAG_A/EN_A or DIAG_B/EN_B, when connected to an external pull-up resistor, enables one leg of the bridge. It also provides a feedback digital diagnostic signal. The CS pin allows to monitor the motor current by delivering a current proportional to its value when CS_DIS pin is driven low or left open. The PWM, up to 20 KHz, lets us control the speed of the motor in all possible conditions. In all cases, a low-level state on the PWM pin turns off both the LS_A and LS_B switches. When PWM rises to a high-level, LS_A or LS_B turns on again depending on the input pin state. Output current limitation and thermal shutdown protects the concerned high-side in short to ground condition.

The short to battery condition is revealed by the overload detector or by thermal shutdown that latches off the relevant low-side.

Active V_CC pin voltage clamp protect the device against low energy spikes in all configurations for the motor. The CP pin provides the necessary gate drive for an external N-channel PowerMOS used for reverse polarity protection.