VNH5250AS-E datasheet(5/18 Pages) STMICROELECTRONICS

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VNH5250AS-E

Block diagram and pin description

Figure 1. Block diagram

Table 2. Block description

Name

Description

Logic control

Allows the turn-on and the turn-off of the high-side and the

low-side switches according to the truth table.

Undervoltage

Shuts down the device for battery voltage lower than 5 V.

High-side and low-side clamp voltage

Protect the high-side and the low-side switches from the

high voltage on the battery line.

High-side and low-side driver

Drive the gate of the concerned switch to allow a proper

RDS(on) for the leg of the bridge.

Current limitation

Limits the motor current in case of short circuit.

High-side and low-side overtemperature

protection

In case of short-circuit with the increase of the junction

temperature, it shuts down the concerned driver to prevent

degradation and to protect the die.

Low-side overload detector

Detects when low-side current exceeds shutdown current

and latches off the concerned low-side.

LOGIC

VCC

OUTA

DIAGA/ENA

INB

INA

GNDA

DIAGB/ENB

LSA

CLAMP HSA

LSA

HSA

HSA_OVERTEMPERATURE

HSB_OVERTEMPERATURE

CURRENT

LIMITATION A

OUTB

GNDB

LSB

HSB

CURRENT

DRIVER

HSA

DRIVER

LSB

DRIVER

HSB

DRIVER

CLAMP HSB

CLAMP LSB

CLAMP LSA

1/K

LIMITATION B

OVERLOAD

DETECTOR B

OVERLOAD

DETECTOR A

POWER

LIMITATION

FAULT

DETECTION

LSB_OVERTEMPERATURE

LSA_OVERTEMPERATURE

GAPGCFT00647

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