UPD168111AMA-6A5 데이터 시트보기 (PDF) - NEC => Renesas Technology

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UPD168111AMA-6A5

MICROSTEP DRIVER FOR DRIVING CAMERA LENS

NEC => Renesas Technology 

µ PD168111A

Excitation position immediately after reset

The initial excitation position immediately after reset is where the current of ch1 is +100% and the current of ch2 is

0%. The following table summarizes the operations from the initial position at each command setting.

Operation Mode

Microstep

2-phase

excitation

CW mode

CCW mode

CW mode

CCW mode

RESETB = “L” → “H”

to Start Point Wait

End

Output Hi-Z state

Start Point Wait End to

Start Point Excitation

Wait End

1

Excitation Stop

Position with 0 Pulse

Set

1

2

2

ch1

CCW + CW

Excitation Stop

Position with 1

Pulse Set

5

6

3

4

RESETB

LATCH

1

4

6

5

2

Start point

–

wait

Start point

excitation wait

+ ch2

3

–

Undervoltage lockout circuit (ULVO)

This circuit forcibly stops the operation of this IC to prevent malfunction of the circuitry when the VDD voltage of the

IC abruptly drops. This function may not operate when the VDD voltage abruptly drops in the order of µs.

VM current shut off circuit

This IC has shut off circuit of output leak current at VDD = 0 V.

When VDD is supplied power, 3 µA MAX. current flows in VM pin because the voltage of VDD and VM must be

detected.

Power application sequence

This IC has two power supply pins: logic power supply (VDD) and output power supply (VM).

To turn on power, turn on VM with VDD turned on.

To turn off power, turn off VM with VDD turned on, and then turn off VDD.

(VDD and VM can also be turned on/off at the same time.)

Data Sheet D16536EJ1V0DS

13

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