LB11850VA 查看數據表（PDF） - ON Semiconductor

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LB11850VA

Single‐phase Full‐wave Pre‐driver with Speed Control Function for Fan Motor

ON Semiconductor 

LB11850VA

Single‐phase Full‐wave

Pre‐driver with Speed

Control Function

for Fan Motor

Monolithic Digital IC

Overview

The LB11850VA is a single-phase bipolar fan motor driver with

speed control function that works with a speed feedback signal.

A highly efficient, quiet and low power consumption motor driver

circuit, with a high speed accuracy and large variable speed can be

implemented by adding a small number of external components.

This pre-driver 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 and Features

• Pre-driver for Single-phase Full-wave Drive

♦ PMOS-NMOS is Used as an External Power TR, Enabling

High-efficiency and Low-power-consumption Drive by Means

of the Low-saturation Output and Single-phase Full-wave Drive

• On-chip Speed Control Circuit

♦ The Speed Control (Closed Loop Control) Using a Speed

Feedback Signal Makes it Possible to Achieve Higher Speed

Accuracy and Lower Speed Fluctuations when Supply Voltage

Fluctuates or Load Fluctuates, Compared with an Open-loop

Control System. Separately Excited Upper Direct PWM Control

Method is Used as the Variable-speed Control System

• External PWM Input or Analog Voltage Input Enabling Variable

Speed Control

♦ The Speed Control Input Signal is Compatible with PWM Duty

Ratio or Analog Voltages

• On-chip Soft Start Circuit

• Lowest Speed Setting Pin

♦ The Lowest Speed can be Set with the External Resistor

• Current Limiter Circuit Incorporated

♦ Chopper Type Current Limit at Start or Lock

• Reactive Current Cut Circuit Incorporated

♦ Reactive Current before Phase Change is Cut to Enable Silent and

Low-consumption Drive

• Constraint Protection and Automatic Reset Functions Incorporated

• FG (Speed Detection), RD (Lock Detection) Output

• Constant-voltage Output Pin for Hall Bias

www.onsemi.com

SSOP24

CASE 565AR

MARKING DIAGRAM

XXXXXXXXXX

YMDDD

XXXXX

Y

M

DDD

= Specific Device Code

= Year

= Month

= Additional Traceability Data

PIN ASSIGNMENT

1

OUT2P

OUT2N

VCC

SENSE

CVI

CVO

CTL

RC

SOFT

CPWM

FG

RD

12

(Top View)

24

OUT1P

OUT1N

SGND

5VREG

C

EO

EI

LIM

CT

IN+

HB

IN−

13

ORDERING INFORMATION

See detailed ordering and shipping information on page 14 of

this data sheet.

© Semiconductor Components Industries, LLC, 2013

1

March, 2018 − Rev. 1

Publication Order Number:

LB11850VA/D

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