A3935KLQ Allegro Microsystems Inc, A3935KLQ Datasheet - Page 10

• Manufacturer Part Number: A3935KLQ
• Description: IC CTRLR MOSFET 3PH 36-SOIC
• Manufacturer: Allegro Microsystems Inc

Specifications of A3935KLQ

• Applications: DC Motor Driver, Brushless (BLDC), 3 Phase
• Number Of Outputs: 1
• Voltage - Load: 7 V ~ 40 V
• Voltage - Supply: 4.75 V ~ 5.25 V
• Operating Temperature: -40°C ~ 135°C
• Mounting Type: Surface Mount
• Package / Case: 36-QSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Output: -

A3935
Input Logic Table
Fault Response Table
a
b
c
d
e
f
These faults are not only reported, but also action is taken by the internal logic to protect the A3935 and the system.
Determined by input states: xLO, xHI, and ENABLE. See Input Logic table.
Short-to-battery can only be detected when the corresponding GLx = 1. This fault is not detected when ENABLE = 0.
Short-to-ground can only be detected when the corresponding GHx = 1. This fault is not detected when ENABLE = 0.
Bridge fault appears as a short-to-ground fault on all motor phases. This fault is not detected when ENABLE = 0.
Off only because V
No Fault
Short-to-Battery
Short-to-Ground
Bridge (VDRAIN) Fault
VREG Undervoltage
VBAT Overvoltage
VBAT Undervoltage
VDD Undervoltage
Thermal Shut Down
ENABLE
0
1
1
1
1
Fault Mode
Operating Conditions
Don’t Care
Input
xLO
f
0
0
1
1
BOOST
3-Phase Power MOSFET Controller for Automotive Applications
f
f
≈ V
Don’t Care
BAT
Don’t Care
Don’t Care
Don’t Care
Don’t Care
Don’t Care
Don’t Care
xHI
ENABLE
0
1
0
1
, which is above the voltage threshold of the Boost regulator voltage control loop.
1
1
1
b
c
d
GLx
¯ F ¯ ¯ A ¯ ¯ U ¯ ¯ L ¯ ¯ T ¯ OVFLT UVFLT
0
0
0
1
0
1
0
0
0
0
0
0
0
0
Output
Fault Output
High Z
High Z
GHx
0
0
0
0
0
1
0
0
0
1
0
0
High Z
High Z
All gate drive outputs low
Both gate drive outputs low
High-side on
Low-side on
XOR circuitry prevents shoot-through
0
0
0
0
0
0
1
Regulator State
Boost
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
Mode of Operation
e
V
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
REG
Driver Output
GHx
0
0
0
a
a
a
a
a
a
GLx
0
0
0
a
a
a
a
a
a
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