LB11967V Datasheet, PDF (1/9 Pages) Sanyo Semicon Device – For Variable Speed Fan Motor Single-Phase Full-Wave Pre-Driver

Ordering number : EN8362C
LB11967V
Monolithic Digital IC
For Variable Speed Fan Motor
Single-Phase Full-Wave Pre-Driver
Overview
The LB11967V is a single-phase bipolar variable speed fan motor pre-driver that works with an external PWM signal.
A highly efficient, quiet and low power consumption motor driver circuit, with a large variable speed, can be implemented
by adding a small number of external components.
This device is optimal for driving large scale fan motors (with large air volume and large current) such as those used in
servers and consumer products.
Functions
• Pre-driver for single-phase full-wave drive
⇒ PNP-EMOS is used as an external power Transistor, enabling high-efficiency low-consumption drive by means of
the low-saturation output and single-phase full-wave drive. (PMOS-NMOS also applicable)
• External PWM input enabling variable speed control
⇒ Separately-excited upper direct PWM (f = 25kHz) control method, enabling highly silent speed control
• Compatible with 12V, 24V, and 48V power supplies
• Current limiter circuit incorporated
⇒ Chopper type current limit at start
• Reactive current cut circuit incorporated
⇒ Reactive current before phase change is cut to enable silent and low-consumption drive.
• Minimum speed setting pin
⇒ Minimum speed can be set with external resistor. The start assistance circuit enables start at extremely low speed.
• Constant-voltage output pin for Hall bias
• Lock protection and automatic reset functions incorporated
• (Rotation speed detection), RD (Lock detection) output
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.
61610 SY/91708 MS / 72308 MS 20080703-S00002 / 92706 / 81005 SY PC No.8362-1/9