DRV10866_15 Datasheet, PDF (3/22 Pages) Texas Instruments – 5V, 3Phase, Sensorless BLDC Motor Driver

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5 Pin Configuration and Functions
DRV10866
SBVS206A – NOVEMBER 2012 – REVISED MARCH 2015
10-Pins WSON with Thermal Pad
DSC Package
Top View
FG 1
COM 2
VCC 3
U4
GND 5
(1)
Thermal Pad
GND
10 PWM
9 CS
8 FGS
7V
6W
(1) Thermal pad connected to ground.
NAME
COM
PIN
NO.
2
CS
9
FG
1
FGS
8
GND
5
PWM
10
U
4
V
7
VCC
3
W
6
Pin Functions
I/O
DESCRIPTION
I
Motor common terminal input
Overcurrent threshold setup pin. The constant current of the internal constant current source
flows through the resistor connected to this pin. The other side of the resistor is connected to
ground. The voltage across the resistor compares with the voltage converted from the
I
bottom MOSFET current. If the MOSFET current is high, the part enters the overcurrent
protection mode by turning off the top PWM MOSFET and holding the bottom MOSFET on. I
(mA) = 3120/R_CS(kΩ).
Equation valid range: 300 mA < I_LIMIT< 850 mA
Frequency generator output. If the FGS pin is connected to ground, the output has a period
O
equal to one electrical cycle (FG). If the FGS pin is connected to VCC, the output has a
period equal to two electrical cycles (1/2FG).
I
FG and 1/2FG control pin. Latched upon wake-up signal from the PWM pin. For details, refer
to Frequency Generator.
—
Ground pin
PWM input pin. The PWM input signal is converted to a fixed 156-kHz switching frequency
on the MOSFET driver. The PWM input signal resolution is less than 1%. This pin can also
I
control the device and put it in or out of standby mode. After the signal at the PWM stays low
(up to 500 µs), the device goes into low-power standby mode. Standby current is
approximately 5 µA. The rising edge of the PWM signal wakes up the device and puts it into
active mode, where it is ready to start to turn the motor.
O
Phase U output
O
Phase V output
I
Input voltage for motor and chip-supply voltage; the internal clamping circuit clamps the V_CC
voltage.
O
Phase W output
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