Datasheet > SI9979_04

SI9979_04

更新时间： 2024-09-15 06:11:39

品牌	Logo	应用领域
威世 - VISHAY		电机控制器
页数	文件大小	规格书
9页	122K
描述
3-Phase Brushless DC Motor Controller

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SI9979_04 数据手册

Si9979

Vishay Siliconix

3-Phase Brushless DC Motor Controller

FEATURES

D Hall-Effect Commutation

D Quadrature Selection

D Tachometer Output

D Reversible

D Cross Conduction Protection

D Current Limiting

D 60_ or 120_ Sensor Spacing

D Integral High-Side Drive for all N-Channel MOSFET

D Undervoltage Lockout

D Internal Pull-Up Resistors

Bridges

D Braking

D PWM Input

D Output Enable Control

DESCRIPTION

The Si9979 is a monolithic brushless dc motor controller with

integral high-side drive circuitry. The Si9979 is configured to

allow either 60_or 120_ commutation sensor spacing. The

internal low-voltage regulator allows operation over a wide

input voltage range, 20- to 40-V dc.

quadrature select, and braking inputs are included for control

along with a tachometer output. Protection features include

cross conduction protection, current limiting, and undervoltage

lockout. The FAULT output indicates when undervoltage, over

current, disable, or invalid sensor shutdown has occurred.

The Si9979 is available in both standard and lead (Pb)-free

48-pin SQFP packages and is specified to operate over the

commercial temperature range of 0 to 70_C (C suffix), and the

industrial temperature range of −40 to 85_C (D suffix).

The Si9979 provides commutation from Hall-effect sensors.

The integral high-side drive, which utilizes combination

bootstrap/charge pump supplies, allows implementation of an

all n-channel MOSFET 3-phase bridge. PWM, direction,

FUNCTIONAL BLOCK DIAGRAM

Bootstrap Reg.

V+

CAP

Charge Pump

Low-Voltage

Regulator

CAP CAP CAP

High-Side

U.V. Lockout

Bootstrap Reg.

Charge Pump

REF

CAP

Low-Side

U.V. Lockout

Bootstrap Reg.

Charge Pump

CAP

Input

Logic

60/120

REF

F/R

PWM

BRK

TACH

FAULT

13-16, 21-24

37-41, 44-48

GND

I −

−

One Shot

I +

R /C

Document Number: 70012

S-41209—Rev. E, 21-Jun-04

www.vishay.com

12 3 4 5 6 7...9

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