LB1872 데이터 시트보기 (PDF) - SANYO -> Panasonic

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LB1872

Polygon Mirror Scanner Driver IC

SANYO -> Panasonic 

Pin Functions

Pin No. Symbol

LB1872

Pin function

1

IN3– Hall amplifier inputs

2

IN3+ IN+ > IN– is the input high state, and the reverse is the input low state.

3

IN1– Connect a capacitor between the IN+ and IN– inputs if there is noise in

4

IN1+ the Hall sensor signals.

5

IN2–

An amplitude of over 50 mV p-p and under 350 mV p-p is desirable in

the Hall sensor signals. Kickback may occur in the output if the input

6

IN2+ signal has an amplitude greater than 350 mV p-p.

7

OUT3 Motor drive outputs

8

OUT2 Connect capacitors between the motor outputs (or between the motor

outputs and ground) if oscillation occurs in the outputs. (Use capacitors

9

OUT1 in the range 0.1 µF to 0.47 µF.)

Output current detection

10

RF Connect a resistor (Rf) between this pin and ground.

The output current is limited to be up to IOUT = VREG/Rf.

11

VCC Power supply

Stabilized power supply output (5-V output)

12

VREG Connect a capacitor (about 0.1 µF) between this pin and ground for

stabilization.

Equivalent circuit

Crystal oscillator connections

13

XO These pins are used to drive the reference clock oscillator element.

14

XI If an external clock (with a frequency of a few MHz) is used, connect a

resistor (about 13 kΩ) to the XI pin in series and input the clock signal

through that resistor. Leave the XO pin open in this case.

Continued on next page.

No. 5625-6/11

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