BU64562GWZ Datasheet, PDF (16/24 Pages) Rohm – Piezoelectric Actuator Driver

BD64562GWZ
6) Setting method of VM voltage slope
The slope can be applied to the VM voltage by setting V1[7:0], V2[7:0], step1[2:0] and step2[4:0].
V1 and V2 are bits for setting VM voltage. The step1 and step2 are bits for setting VM slope.
VM voltage increase that it set it every 50 µs.
It is necessary to enlarge the setting of V2 more than V1.
LSB of each setting bits does not depend on the VCC voltage (LSB = 4.8 / 255 = 18.8 mV (Typ.)).
Datasheet
●Normal function
Setting V2[7:0] (V1[7:0] = 0x00, step1[2:0] = 0x0, step2[4:0] = 0x00)
VM
V2
cntck[2:0]×cnt[15:0]
time
●One time slope
Setting V2[7:0] and step2[4:0] (V1[7:0] = 0x00, step1[2:0] = 0x0 and cntck[2:0] = 0x0)
VM
V2
cnt[15:0]
time
① = 50 µs × V2[7:0] / step2[4:0]
② = 50 µs (The first step output the keeping voltage.)
③ = 50 µs × ( V2[7:0] / step2[4:0] - 1)
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TSZ22111・15・001
16/20
TSZ02201-0H2H0B600450-1-2
9.Oct.2012 Rev.001