DRV8301_14 Datasheet, PDF (4/28 Pages) Texas Instruments – Three Phase Pre-Driver with Dual Current Shunt Amplifiers and Buck Regulator

DRV8301
SLOS719B – AUGUST 2011 – REVISED AUGUST 2013
www.ti.com
PIN
NAME
NO.
BST_C
38
SL_B
39
GL_B
40
SH_B
41
GH_B
42
BST_B
43
SL_A
44
GL_A
45
SH_A
46
GH_A
BST_A
VDD_SPI
PH
BST_BK
PVDD2
EN_BUCK
47
48
49
50, 51
52
53,54
55
SS_TR
56
GND
57
(POWER
PAD)
I/O ⁽¹⁾
P
I
O
I
O
P
I
O
I
O
P
I
O
P
P
I
I
P
PIN FUNCTIONS (continued)
DESCRIPTION
Bootstrap cap pin for half-bridge C
Low-Side MOSFET source connection, half-bridge B. Low-side V_DS measured between this pin and
SH_B.
Gate drive output for Low-Side MOSFET, half-bridge B
High-Side MOSFET source connection, half-bridge B. High-side V_DS measured between this pin and
PVDD1.
Gate drive output for High-Side MOSFET, half-bridge B
Bootstrap cap pin for half-bridge B
Low-Side MOSFET source connection, half-bridge A. Low-side V_DS measured between this pin and
SH_A.
Gate drive output for Low-Side MOSFET, half-bridge A
High-Side MOSFET source connection, half-bridge A. High-side V_DS measured between this pin and
PVDD1.
Gate drive output for High-Side MOSFET, half-bridge A
Bootstrap cap pin for half-bridge A
SPI supply pin to support 3.3V or 5V logic. Connect to either 3.3V or 5V.
The source of the internal high side MOSFET of buck converter
Bootstrap cap pin for buck converter
Power supply pin for buck converter, PVDD2 cap should connect to GND.
Enable buck converter. Internal pull-up current source. Pull below 1.2V to disable. Float to enable.
Adjust the input undervoltage lockout with two resistors
Buck soft-start and tracking. An external capacitor connected to this pin sets the output rise time. Since
the voltage on this pin overrides the internal reference, it can be used for tracking and sequencing. Cap
should connect to GND
GND pin. The exposed power pad must be electrically connected to ground plane through soldering to
PCB for proper operation and connected to bottom side of PCB through vias for better thermal
spreading.
4
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