LB11870_07 Datasheet, PDF (1/14 Pages) Sanyo Semicon Device – For Polygonal Mirror Motors Three-Phase Brushless Motor Driver

Ordering number : EN7256A
LB11870
Monolithic Digital IC
For Polygonal Mirror Motors
Three-Phase Brushless Motor Driver
Overview
The LB11870 is a three-phase brushless motor driver developed for driving the motors used with the polygonal
mirror in laser printers and plain paper copiers. It can implement, with a single IC chip, all the circuits required
for polygonal mirror drive, including speed control and driver functions. The LB11870 can implement motor drive
with minimal power loss due to its use of direct PWM drive.
Functions
• Three-phase bipolar drive
• Direct PWM drive
• Includes six high and low side diodes on chip.
• Output current control circuit
• PLL speed control circuit
• Phase lock detection output (with masking function)
• Includes current limiter, thermal protection, rotor constraint protection, and low-voltage protection circuits on chip.
• Deceleration type switching circuit (free running or reverse torque)
• PWM oscillator
• Power saving circuit
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.
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's products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer's products or
equipment.
62707 MS IM B8-9164 / 80102 AS (OT) No.7256-1/14