LB1821 datasheet(15/16 Pages) SANYO

Part #	LB1821

Description	Power Brushless Motor Pre-Driver IC for OA Equipment

PDF	16 Pages

Scroll/Zoom	100%

Manufacturer	SANYO [Sanyo Semicon Device]

Direct Link	https://www.sanyo-av.com/us/

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15 / 16 page

No. 5686-15/16

LB1821M

Continued from preceding page.

Pin No.

Functions

Equivalent circuit

VREG

7-V shunt regulator output

PWM oscillator frequency setting

CROCK

Reference signal oscillator connection. This oscillator is

used by the motor constraint detection circuit, the clock

disconnection protection circuit, and other circuits.

A protection operation time of about 2.1 seconds can be set

up by connecting a capacitor of about 0.047 µF between

this pin and ground.

Setting for the charge current used for the VCO circuit C pin

Connect a resistor between this pin and ground. The value

of that resistor must not be lower than 2.7 k

Ω.

VCO oscillator connection. This pin sets the VCO

frequency.

Connect a capacitor between this pin and ground.

Set the value of the capacitor so that the oscillator

frequency does not exceed 1 MHz.

Continued on next page.

LB1821 Datasheet(PDF) 15 Page - Sanyo Semicon Device