Datasheet > STA6940M

STA6940M

更新时间： 2024-01-30 12:10:11

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器电动机控制
页数	文件大小	规格书
19页	482K
描述
Brushed DC Motor Driver IC With PWM Control

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STA6940M 数据手册

STA6940M

Brushed DC Motor Driver IC With PWM Control

Features and Benefits

Description

▪ Power supply voltage, V_BB, 44 V maximum, 10 to 40 V

normal operating range

▪ Logic supply voltage, V_DD, 3 to 5.5 V compatible

▪ Output current, I_O,4 A average, 8 A maximum

▪ Output elements are all N-channel MOSFETs to reduce

losses

Combining low-power CMOS-compatible logic with high-

current,high-voltagepowerMOSFEToutputs,theSTA6940M

provides complete control and drive for brush DC motors.

It provides internal fixed off time, pulse-width modulation

(PWM) control of the output current, rated for 4 A normal

operating level.

▪ Internal charge pump

▪ Forward, reverse, free, and brake control modes available

▪ Constant-current control:

▫ Off-time 35 μs, fixed (Slow Decay mode)

▪ Internal Overcurrent Protection (OCP) circuitry

▫ Off-time 142 μs fixed (Fast Decay mode)

▪ Internal Thermal Shutdown (TSD) circuitry

▪ ZIP type 18-pin fully-molded package (STA package)

The CMOS logic section provides four modes of operation:

forward and reverse normal drive rotation, outputs-off free

spin (coast), and electronic braking.

Theinnovativemulti-chipinternalstructureseparatesthemain

logicIC(MIC)fromthefourN-channelpowerMOSFETs.This

results in lower thermal resistance and greater efficiency.

PWM control allows constant-current control of output while

reducing heat generation and power losses by providing fixed

off-time dual decay modes. The internal charge pump ensures

full power availability for switching.

Package: 18-pin ZIP (STA)

Not to scale

Functional Block Diagram

VDD

CP1 CP2 VBB VBB

MIC

Charge Pump

Reg

UVLO

IN1

IN2

Logic

Pre-Driver

Diag

Comp

OSC

Reg

PWM_REF

PWM and

OCP Control

OCP_REF

GND

Sense2 Sense1

28106.01

12 3 4 5 6 7...19

中文翻译

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