sla6860m Allegro MicroSystems, Inc., sla6860m Datasheet - Page 12

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

Typical Applications
This section examines typical application circuit designs using
these devices, with and without output current limiting, and the
timing effects that result.
Figure 17. Typical Application. Current limiting by controlling power to high-side MOSFETs.
System
Logic
15 V
CC
R1
RR
5V
5 V
ZD
C 1
ZD
C2
R 2
5V
4
5
9
8
7
6
23
17
20
19
18
15
22
21
VCC1
SD1
HIN 1
HIN 2
HIN 3
COM1
VCC 2
OCL
LIN 1
LIN 2
LIN 3
RC
SD 2
COM2
Low-side
Logic Circuit
VB1
High-side
Logic Circuit
Worcester, Massachusetts 01615-0036 U.S.A.
1
1.508.853.5000; www.allegromicro.com
VB2 VB3
2
Allegro MicroSystems, Inc.
HO 1
HO 2
HO 3
HS1
HS2
HS3
LO1
LO2
LO3
RS
115 Northeast Cutoff
3
SLA6860M/SMA6860M
Current Limiting by PWM Control This application imple-
ments current limiting by connecting the OCL and SD1 pins (fig-
ure 17). Current limiting occurs by turning off and on the power
supplied to the high side of the MOSFET bridge. The timing is
illustrated in figure 18.
16
14
10
24
12
11
13
M
CSB
12