sla6860m Allegro MicroSystems, Inc., sla6860m Datasheet - Page 11

• Manufacturer Part Number: sla6860m
• Description: High Voltage Sla6860m And Sma6860m Series Driver Ics For 3-phase Dc Motor Applications
• Manufacturer: Allegro MicroSystems, Inc.

Figure 15. Overcurrent Protection Circuit Timing
Figure 16. Overcurrent Protection Circuit
CC
RR
+5 V
S D 2
LS1
LIN
R C
LO
LS 1
RC
A. The LOx signal is described, including delay imposed in accordance with the
RC time constant by the input capacitance of the gate resistor and MOSFET.
B. Waveforms when both the SD2 and the RC signals are off, and include delay
due to the time constants of the internal resistor (50 Ω) and the external capacitors
C2, CC, and RC.
V
(1 V)
TRIP
(1 V)
50 Ω
V
ref
2 μs
–
+
OCP
3.5 V
Expansion
Worcester, Massachusetts 01615-0036 U.S.A.
Pulse
5 μs
–
+
1.508.853.5000; www.allegromicro.com
Filter
2 μs
2 μs
OCP
Allegro MicroSystems, Inc.
115 Northeast Cutoff
5 μs
R
S
FF
Q
Shutdown
MOSFET
3.5 V
Release
OCP
Slope set by
RC, CC
50 Ω
Slope set by
R2, C2
V
th
(2.9 V)
SD2
+5 V
R2
C2
11