Texas Instruments Three Phase BLDC, PMSM Motor Kit with DRV8301, Encoder and RM46 Safety MCU DRV8301-RM46-KIT DRV8301-RM46-KIT Hoja De Datos
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DRV8301-RM46-KIT
SLOS719B – AUGUST 2011 – REVISED AUGUST 2013
PIN FUNCTIONS
PIN
I/O
(1)
DESCRIPTION
NAME
NO.
RT_CLK
1
I
Resistor timing and external clock for buck regulator. Resistor should connect to GND (power pad) with
very short trace to reduce the potential clock jitter due to noise.
very short trace to reduce the potential clock jitter due to noise.
COMP
2
O
Buck error amplifier output and input to the output switch current comparator.
VSENSE
3
I
Buck output voltage sense pin. Inverting node of error amplifier.
PWRGD
4
O
An open drain output with external pull-up resistor required. Asserts low if buck output voltage is low
due to thermal shutdown, dropout, over-voltage, or EN_BUCK shut down
due to thermal shutdown, dropout, over-voltage, or EN_BUCK shut down
OCTW
5
O
Over current or/and over temperature warning indicator. This output is open drain with external pull-up
resistor required. Programmable output mode via SPI registers.
resistor required. Programmable output mode via SPI registers.
FAULT
6
O
Fault report indicator. This output is open drain with external pull-up resistor required.
DTC
7
I
Dead-time adjustment with external resistor to GND
SCS
8
I
SPI chip select
SDI
9
I
SPI input
SDO
10
O
SPI output
SCLK
11
I
SPI clock signal
DC_CAL
12
I
When DC_CAL is high, device shorts inputs of shunt amplifiers and disconnects loads. DC offset
calibration can be done through external microcontroller.
calibration can be done through external microcontroller.
GVDD
13
P
Internal gate driver voltage regulator. GVDD cap should connect to GND
CP1
14
P
Charge pump pin 1, ceramic cap should be used between CP1 and CP2
CP2
15
P
Charge pump pin 2, ceramic cap should be used between CP1 and CP2
EN_GATE
16
I
Enable gate driver and current shunt amplifiers. Control buck via EN_BUCK pin.
INH_A
17
I
PWM Input signal (high side), half-bridge A
INL_A
18
I
PWM Input signal (low side), half-bridge A
INH_B
19
I
PWM Input signal (high side), half-bridge B
INL_B
20
I
PWM Input signal (low side), half-bridge B
INH_C
21
I
PWM Input signal (high side), half-bridge C
INL_C
22
I
PWM Input signal (low side), half-bridge C
DVDD
23
P
Internal 3.3V supply voltage. DVDD cap should connect to AGND. This is an output, but not specified
to drive external circuitry.
to drive external circuitry.
REF
24
I
Reference voltage to set output of shunt amplfiiers with a bias voltage which equals to half of the
voltage set on this pin. Connect to ADC reference in microcontroller.
voltage set on this pin. Connect to ADC reference in microcontroller.
SO1
25
O
Output of current amplifier 1
SO2
26
O
Output of current amplifier 2
AVDD
27
P
Internal 6V supply voltage, AVDD cap should always be installed and connected to AGND. This is an
output, but not specified to drive external circuitry.
output, but not specified to drive external circuitry.
AGND
28
P
Analog ground pin
PVDD1
29
P
Power supply pin for gate driver, current shunt amplifier, and SPI communication. PVDD1 is
independent of buck power supply, PVDD2. PVDD1 cap should connect to GND
independent of buck power supply, PVDD2. PVDD1 cap should connect to GND
SP2
30
I
Input of current amplifier 2 (connecting to positive input of amplifier). Recommend to connect to ground
side of the sense resistor for the best commom mode rejection.
side of the sense resistor for the best commom mode rejection.
SN2
31
I
Input of current amplifier 2 (connecting to negative input of amplifier).
SP1
32
I
Input of current amplifier 1 (connecting to positive input of amplifier). Recommend to connect to ground
side of the sense resistor for the best commom mode rejection.
side of the sense resistor for the best commom mode rejection.
SN1
33
I
Input of current amplifier 1 (connecting to negative input of amplifier).
SL_C
34
I
Low-Side MOSFET source connection, half-bridge C. Low-side V
DS
measured between this pin and
SH_C.
GL_C
35
O
Gate drive output for Low-Side MOSFET, half-bridge C
SH_C
36
I
High-Side MOSFET source connection, half-bridge C. High-side V
DS
measured between this pin and
PVDD1.
GH_C
37
O
Gate drive output for High-Side MOSFET, half-bridge C
(1)
KEY: I =Input, O = Output, P = Power
Copyright © 2011–2013, Texas Instruments Incorporated
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