ATA6826-DK Atmel, ATA6826-DK Datasheet - Page 15

• Manufacturer Part Number: ATA6826-DK
• Description: BOARD EVALUATION FOR ATA6826
• Manufacturer: Atmel

Specifications of ATA6826-DK

• Main Purpose: Power Management, Half H-Bridge Driver (Internal FET)
• Embedded: No
• Utilized Ic / Part: ATA6826
• Primary Attributes: 3 Half H-Bridge Drivers, 1A, 2 kV ESD Protection
• Secondary Attributes: Short-Circuit, Thermal & Undervoltage Protection
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

6.2
4981A–AUTO–02/07
Inductive Shutdown
Any driver IC faces a challenge when an inductive load is connected to its outputs, as the energy
stored in the inductance leads to a voltage peak when the load is switched off. An inductive load
connected to the low-side driver outputs causes a voltage peak with positive polarity, while for
the high-side outputs such peak is negative. In order to prevent any damage to the IC’s output
stages, some protective means have to be implemented.
tection circuit of the outputs.
Figure 6-3.
The clamping structures at the output stages limit the voltage peak and provide a path for the
current after switching off. The maximum inductive shutdown energy for ATA6826 is specified as
15 mJ. This value applies for both low-side and high-side outputs. The energy W
inductor L during the switched-on state can be calculated using the following formula:
w
L
=
L
----------------- -
2
I
L
2
Principal Clamping Structure at a Driver Stage
ATA6826
V
OUTy
S
Figure 6-3
illustrates the principal pro-
ATA6826
L
stored in the
15