ATA6026 Datasheet, PDF (1/34 Pages) ATMEL Corporation – H-bridge Motor Driver

Features
• 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_CWD and the External Watchdog Resistor R_CWD
• 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
H-bridge Motor
Driver
ATA6026
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.
Rev. 4865C–AUTO–01/06