82708 MS PC/91002AS (OT) No.7257-1/11

Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate

the performance, characteristics, and functions of the described products in the independent state, and are not

guarantees of the performance, characteristics, and functions of the described products as mounted in the

customer

device, the customer should always evaluate and test devices mounted in the customer

equipment.

Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to

"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,

communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be

intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace

instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety

equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case

of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee

thereof. If you should intend to use our products for applications outside the standard applications of our

customer who is considering such use and/or outside the scope of our intended standard applications, please

consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our

customer shall be solely responsible for the use.

LB11872H

Overview

The LB11872H is a three-phase brushless motor driver developed for driving the motors used for the polygonal mirror in

laser printers and similar applications. It can implement, with a single IC chip, all the circuits required for polygonal mirror

drive, including speed control and driver functions. The LB11872H can implement motor drive within minimal drive noise

due to its use of current linear drive.

Features

• Three-phase bipolar current linear drive + midpoint control circuit.

• PLL speed control circuit.

• Speed is controlled by an external clock signal.

• Supports Hall FG operation.

• Built-in output saturation prevention circuit.

• Phase lock detection output (with masking function).

• Includes current limiter, thermal protection, rotor constraint protection, and low-voltage protection circuits on chip.

• On-chip output diodes.

Specifications

Absolute Maximum Ratings at Ta = 25

°C

Parameter

Symbol

Conditions

Ratings

Unit

Supply voltage

VCC max

30

V

Output current

IO max

T

≤ 500ms

1.2

A

Pd max1

Independent IC

0.8

W

Allowable power dissipation

Pd max2

*With specified substrate

2.0

W

Operating temperature

Topr

-20 to +80

°C

Storage temperature

Tstg

-55 to +150

°C

∗ When mounted on the specified printed circuit board : 114.3mm × 76.1mm × 1.6mm, glass epoxy

Monolithic Digital IC

For Polygonal Mirror Motors

Three-Phase Brushless Motor Driver

Ordering number : EN7257B