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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
'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
'sproductsor
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
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