ATA6026 ATMEL Corporation, ATA6026 Datasheet

ATA6026

Manufacturer Part Number

ATA6026

Description

H-bridge Motor Driver

Manufacturer

ATMEL Corporation

Datasheet

1.ATA6026.pdf (34 pages)

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Features

•

1. Description

The ATA6026 is used to drive a continuous-current motor in a full H-bridge configura-

tion. An external microcontroller controls the driving function of the ATA6026 by

providing a PWM signal and a direction signal, and allows the usage of the ATA6026

in a windshield wiper application, for example.

The ATA6026 supports PWM and direction-controlled driving of four external power

MOSFETs with two external bootstrap capacitors. The PWM control is performed by

the high-side switch. The opposite low-side switch is permanently ON in the driving

phase. Motor braking is performed using the low-side switches. A programmable dead

time is included to prevent peak currents within the H-bridge. The maximum PWM fre-

quency is 30 kHz.

PWM and Direction-controlled Driving of Four Externally Powered NMOS Transistors

Internal Charge Pump Provides Gate Voltages for High-side Drivers in Permanent ON

Mode and Supplies the Gate of the External Battery Reverse Protection NMOS

5V Regulator With External Power Device (NPN) and Current Limitation Function

Reset Derived From 5V Regulator Output Voltage

Sleep Mode With Supply Current of Typical 35 µA, Wake-up by Signal on Pin EN or on

SCI Interface (Pin /DATA)

Window Watchdog; the Watchdog Time is Programmable by Choosing a Certain Value

of the External Watchdog Capacitor C

Battery Overvoltage Protection and Battery Undervoltage Management

Overtemperature Protection

SCI Transceiver (Operating in Differential or Single-ended Mode) for Use at Battery

Voltage Level

Digital Control Block With the Control Pins EN, DIR, PWM

Internal Low-power Regulator With Low-power Band Gap (Trimmed With Four Bits) to

Guarantee Power Dissipation in Sleep Mode and to Guarantee Parameters for Wake-up

CWD

and the External Watchdog Resistor R

CWD

H-bridge Motor

Driver

ATA6026

Rev. 4865C–AUTO–01/06

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