DRV8301_14 Datasheet, PDF (20/28 Pages) Texas Instruments – Three Phase Pre-Driver with Dual Current Shunt Amplifiers and Buck Regulator

DRV8301
SLOS719B – AUGUST 2011 – REVISED AUGUST 2013
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• FAULT is high when any fault occurs to cause a shut down (GVDD_UV, PVDD_UV, OTSD, OCSD,
GVDD_OV), which is opposite to FAULT hardware pin.
Control Registers
Table 7. Control Register 1 for Gate Driver Control (Address: 0x02)⁽¹⁾
Address
Name
Description
D10 D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
0x02
GATE_CURRENT
Gate driver peak current 1.7A (for slew rate
control)
0
0
Gate driver peak current 0.7A
0
1
Gate driver peak current 0.25A
1
0
Reserved
1
1
GATE_RESET Normal mode
0
Reset all latched faults related to gate driver, reset
gate driver back to normal operation, reset status
1
register values to default
GATE_RESET value will automatically reset to
zero after gate driver completes reset
PWM_MODE PWM with six independent inputs
0
PWM with three independent inputs. PWM control
high side gates only. Low side is complementary
to high side gates with minimum internal dead
1
time.
OC_MODE
(gate driver only)
Current limiting when OC detected
0
0
Latched shut down when OC detected
0
1
Report only (no current limiting or shut down)
when OC detected
1
0
OC protection disabled (no OC sensing and
reporting)
1
1
OC_ADJ_SET See OC_ADJ_SET table
X
X
X
X
X
(1) Bold is default value
Table 8. Control Register 2 for Current Shunt Amplifiers and Misc Control (Address: 0x03)⁽¹⁾
Address
0x03
Name
OCTW_SET
GAIN
DC_CAL_CH1
DC_CAL_CH2
OC_TOFF
Reserved
Description
D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Report both OT and OC at /OCTW pin
0
0
Report OT only
0
1
Report OC only
1
0
Report OC Only (Reserved)
1
1
Gain of shunt amplifier: 10V/V
0
0
Gain of shunt amplifier: 20V/V
0
1
Gain of shunt amplifier: 40V/V
1
0
Gain of shunt amplifier: 80V/V
1
1
Shunt amplifier 1 connects to load through input pins
0
Shunt amplifier 1 shorts input pins and disconnected from load
1
for external calibration
Shunt amplifier 2 connects to load through input pins
0
Shunt amplifier 2 shorts input pins and disconnected from load
1
for external calibration
Normal CBC operation (recovering at next PWM cycle)
0
Off time control during OC
1
(1) Bold value is default value
20
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