DRV8308_15 Datasheet, PDF (3/60 Pages) Texas Instruments – DRV8308 Brushless DC Motor Controller

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DRV8308
SLVSCF7A – FEBRUARY 2014 – REVISED OCTOBER 2014
6 Pin Configurations and Functions
40 RHA (VQFN) PACKAGE
(TOP VIEW)
UHP 1
UHN 2
VHP 3
VHN 4
WHP 5
WHN 6
VSW 7
FGFB ⁸
FGINN_TACH ⁹
FGINP ¹⁰
GND
TBD
30 _CP1
29 _CP2
28 _VCP
27 _VM
26 _GND
25 VINT
24 VREG
23 RESET
22 _ENABLE
21 _DIR
Pin Functions
PIN
I/O ⁽¹⁾
NAME
NUMBER
DESCRIPTION
EXTERNAL COMPONENTS OR CONNECTIONS
POWER AND GROUND
CP1
30
PWR
Charge pump flying capacitor
Connect a 0.1-μF 35-V capacitor between CP1 and CP2
CP2
29
PWR
GND
26, PPAD
PWR
Ground reference. Terminal 26 and the
Power Pad are internally connected.
Connect to board GND
VCP
28
PWR Charge pump storage capacitor
Connect a 1-μF 35-V ceramic capacitor to VM
VINT
25
PWR
Internal 1.8-V core voltage regulator
bypass
Bypass to GND with a 1-μF 6.3-V ceramic capacitor
VM
27
PWR Motor supply voltage
Connect to motor supply voltage.
Bypass to GND with a 0.1-μF ceramic capacitor, plus a large
electrolytic capacitor (47 μF or larger is recommended), with
a voltage rating of 1.5× to 2.5× VM.
VREG
24
PWR
5-V regulator output. Active when
ENABLE is active.
Bypass to GND with a 0.1-μF 10-V ceramic capacitor. Can
provide 5-V power to Hall sensors.
VSW
7
PWR
Switched VM power output. When
ENABLE is active, VM is applied to this
terminal.
Can be used for powering Hall elements, along with added
series resistance.
CONTROL
BRAKE
Causes motor to brake. Polarity is
20
I programmable. Internal pulldown
resistor.
CLKIN
The clock input, used in Clock
19
I Frequency Mode and Clock PWM
Mode. Internal pulldown resistor.
Sets motor rotation direction. Polarity is
DIR
21
I programmable. Internal pulldown
resistor.
ENABLE
Enables and disables motor. Polarity is
22
I programmable. Internal pulldown
resistor.
(1) I = input, O = output, OD = open-drain output, I/O = input/output
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