Datasheet

DRV8830
SLVSAB2F –MAY 2010– REVISED FEBRUARY 2012 www.ti.com
Voltage Setting (VSET DAC)
The DRV8830 includes an internal reference voltage that is connected to a DAC. This DAC generates a voltage
which is used to set the PWM regulated output voltage as described above.
The DAC is controlled by the VSET bits from the serial interface. The commanded output voltage is as follows:
VSET[5..0] Output Voltage VSET[5..0] Output Voltage
0x00h Reserved 0x20h 2.57
0x01h Reserved 0x21h 2.65
0x02h Reserved 0x22h 2.73
0x03h Reserved 0x23h 2.81
0x04h Reserved 0x24h 2.89
0x05h Reserved 0x25h 2.97
0x06h 0.48 0x26h 3.05
0x07h 0.56 0x27h 3.13
0x08h 0.64 0x28h 3.21
0x09h 0.72 0x29h 3.29
0x0Ah 0.80 0x2Ah 3.37
0x0Bh 0.88 0x2Bh 3.45
0x0Ch 0.96 0x2Ch 3.53
0x0Dh 1.04 0x2Dh 3.61
0x0Eh 1.12 0x2Eh 3.69
0x0Fh 1.20 0x2Fh 3.77
0x10h 1.29 0x30h 3.86
0x11h 1.37 0x31h 3.94
0x12h 1.45 0x32h 4.02
0x13h 1.53 0x33h 4.10
0x14h 1.61 0x34h 4.18
0x15h 1.69 0x35h 4.26
0x16h 1.77 0x36h 4.34
0x17h 1.85 0x37h 4.42
0x18h 1.93 0x38h 4.50
0x19h 2.01 0x39h 4.58
0x1Ah 2.09 0x3Ah 4.66
0x1Bh 2.17 0x3Bh 4.74
0x1Ch 2.25 0x3Ch 4.82
0x1Dh 2.33 0x3Dh 4.90
0x1Eh 2.41 0x3Eh 4.98
0x1Fh 2.49 0x3Fh 5.06
The voltage can be calculated as 4 x VREF x (VSET +1) / 64, where VREF is the internal 1.285-V reference.
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