ATA6826-DK Atmel, ATA6826-DK Datasheet - Page 16

• 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

6.3
16
Discharger Circuit
ATA6826
Figure 6-4.
Many typical applications use an inverse-polarity protection diode, such as D1 in
the power-supply feed to prevent any damage if V
the popularity of this method, it involves a certain danger.
During inhibit mode, the IC consumes only an extremely low current I
mum. Any peaks on the supply voltage (V
capacitor (C9 in
due to the extremely small quiescent current, discharging via the IC can also be neglected.
This means that during long periods in inhibit mode, the IC's supply voltage could increase con-
tinuously until the maximum supply voltage limit of 40V is exceeded, damaging the IC. ATA6826
therefore features a discharger circuit that prevents such unwanted effects. If V
threshold value of approximately 27V, the blocking capacitor is discharged via an integrated
resistor until V
Figure 6-5.
S
Inductive Pulse at Low-side Output;
Channel 1: Gradient of V
(200 mA/Div.), Pulse Energy: W
Functional Principle of the Discharger Circuit
again falls below the threshold.
Figure
ATA6826
6-5). D1 prevents the capacitor from discharging via the power supply;
26.8V
2 k
out
(10V offset), Channel 4: Gradient of I
pk
V
S
in
L
= 5 mJ
Figure
C1
S
is applied with the wrong polarity. Despite
D1
6-5) will gradually charge the blocking
V
batt
VS
V
, such as 20 µA at maxi-
pk
out
4981A–AUTO–02/07
Figure
S
exceeds a
6-5, in