ATA6026 ATMEL Corporation, ATA6026 Datasheet - Page 5

• Manufacturer Part Number: ATA6026
• Description: H-bridge Motor Driver
• Manufacturer: ATMEL Corporation

3. Functional Description
3.1
3.1.1
3.2
4865C–AUTO–01/06
Power Supply Unit
Sleep Mode
Power Supply
The ATA6026 is supplied by a reverse-protected battery voltage. To prevent damage to the IC,
proper external protection circuitry must to be added. Use of a capacitor combination of storage
and HF capacitors behind the reverse protection circuitry and closed to the VBAT pin of the
ATA6026
A fully-internal low-power and low-drop regulator with a voltage of 5V and cleaned by an exter-
nal blocking capacitor provides the necessary low-voltage supply needed for the wake-up
process. The low-power band gap is trimmed by OTPDC and is also used for the big regulator.
The following blocks are supplied by the internal regulator:
The internal supply voltage VINT must not be used for any other supply reasons!
All the remaining blocks are supplied by the VCC regulator (5V).
For detection reasons by microcontroller, there is a high-voltage switch which brings out the bat-
tery voltage to the pin VBAT_SWITCH. This switch is ON for VCC > V
Sleep mode exists to guarantee the low quiescent current of the inactive ATA6026. In Sleep
mode it is possible to wake up the IC by using the pins EN or /DATA. The following blocks are
active in Sleep mode:
• Enable input comparator
• Band gap
• Wake-up part of the SCI interface
• Digital control of the complete ATA6026
• OTPDC
• VCC regulator (5V external)
• Band gap
• Internal 5V regulator with external blocking capacitor of 100 nF
• Input structure for detecting the EN pin threshold
• Wake-up block of SCI receive part
(Figure 1-1 on page
2) is recommended.
thRES
.
ATA6026
5