Allegro公司的STA6940M是帶PWM控制的無(wú)刷DC馬達(dá)驅(qū)動(dòng)器,集成了低功耗CMOS兼容的邏輯(3.5V-5.5V)和大電流高壓功率MOSFET輸出,輸出電流有固定的關(guān)斷時(shí)間和PWM控制,工作電壓從10V到40V,正常工作電流4A,最大電流8A.本文介紹了STA6940M主要特性和優(yōu)勢(shì),功能方框圖和典型應(yīng)用電路以及參考元件數(shù)值.STA6940M:BrushedDCMotorDriverICWithPWMControlCombininglow-powerCMOS-compatiblelogicwithhighcurrent,high-voltagepowerMOSFEToutputs,th
Allegro 公司的
STA69
40M是帶PWM控制的無(wú)刷DC馬達(dá)驅(qū)動(dòng)器,集成了低功耗
CMOS兼容的邏輯(3.5V-5.5V)和大
電流高壓
功率MOSFET輸出,輸出電流有固定的關(guān)斷時(shí)間和PWM控制,工作電壓從10V到40V,正常工作電流4A,最大電流8A.本文介紹了STA6940M主要特性和優(yōu)勢(shì), 功能方框圖和典型應(yīng)用電路以及參考元件數(shù)值.
STA6940M: Brushed DC Motor Driver
ICWith PWM Control
Combining low-
powerCMOS-compatible logic with highcurrent, high-voltage power MOSFET outputs, the STA6940M provides complete control and drive for brush DC motors. It provides internal fixed off time, pulse-width modulat
ion (PWM) control of the output current, rated for 4 A normal operating level.
The CMOS logic section provides four modes of operation: forward and reverse normal drive rotation, outputs-off free s
pin(coast), and electronic braking.
The innovative
multi-chip internal structure separates the main logic IC (
MIC) from the four N-channel power MOSFETs. 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.
STA6940M主要特性和優(yōu)勢(shì):
? Power supply voltage, VBB , 44 V maximum, 10 to 40 V normal operating range
? Logic supply voltage, VDD , 3 to 5.5 V compatible
? Output current, IO ,4 A average, 8 A maximum
? Output elements are all N-channel MOSFETs to reduce losses
? 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
