參數(shù)資料
型號(hào)： UPD168110
廠商： NEC Corp.
英文描述： MICROSTEP DRIVER FOR DRIVING CAMERA LENS
中文描述： 微步驅(qū)動(dòng)驅(qū)動(dòng)光圈鏡頭
文件頁(yè)數(shù)： 11/18頁(yè)
文件大?。?/td> 200K
代理商： UPD168110
Data Sheet S15840EJ2V0DS
11
μ
PD168110
OPERATION DESCRIPTION
Setting output current
The peak value of the output current (when current of ch 1 or ch 2 is 100%) is determined by the resistor R
FB
that
is connected to FB1 and FB2. This IC has an internal reference power supply V
REF
(500 mV TYP.) for comparing
current, and drives the stepper motor with the current value calculated by R
FB
and V
REF
as the peak output
current value.
Peak output current value I
MAX
(A)
V
REF
(V)
÷
R
FB
(
) x Output detection ratio
Pulse output
The motor is driven by inputting a pulse to the CLK pin. The motor advances by one pulse at the rising edge of
the CLK signal. When MODE = “H”, the motor is driven in the 64-microstep driving mode, and the driving current
of each step is determined based on the internal motor excitation position information and revolution direction.
When MODE = “L”, the two-phase excitation mode is selected, and the current direction (100% drive) of ch 1 and
ch 2 are switched each time a pulse has been input.
Setting motor revolution direction
The revolution direction of the motor is set by CW. In the CW mode (CW = “L”), the current of ch2 is output, 90
°
degrees in phase behind the current of ch1. In the CCW mode (CW = “H”), the current of ch2 is output, 90
°
degrees in phase ahead of the current of ch1.
CW Pin
Operation Mode
L
CW mode (forward revolution)
H
CCW mode (reverse revolution)
Setting stop mode (valid only in microstep driving mode)
When STOP = “H”, the motor advances to the position of MOB output = “L”, and the output status is held.
The excitation status is not changed even when a pulse is input to CLK while MOB = “L” when STOP = “H”. The
pulse can be advanced when STOP = “L”.
STOP
Operation Mode
L
Normal mode
H
Stop mode
Caution If STOP = “L” before the stop mode is set (until MOB = “L”), the operation is performed in the
same manner as in the normal mode.
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