Allegro公司的STA6940M是带PWM控制的无刷DC马达驱动器,集成了低功耗CMOS兼容的逻辑(3.5V-5.5V)和大电流高压功率MOSFET输出,输出电流有固定的关断时间和PWM控制,工作电压从10V到40V,正常工作电流4A,最大电流8A.本文介绍了STA6940M主要特性和优势,功能方框图和典型应用电路以及参考元件数值.STA6940M:BrushedDCMotorDriverICWithPWMControlCombininglow-powerCMOS-compatiblelogicwithhighcurrent,high-voltagepowerMOSFEToutputs,th
Allegro 公司的
STA69
40M是带PWM控制的无刷DC马达驱动器,集成了低功耗
CMOS兼容的逻辑(3.5V-5.5V)和大
电流高压
功率MOSFET输出,输出电流有固定的关断时间和PWM控制,工作电压从10V到40V,正常工作电流4A,最大电流8A.本文介绍了STA6940M主要特性和优势, 功能方框图和典型应用电路以及参考元件数值.
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主要特性和优势:
? 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
