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Forum: ARM programming with GCC/GNU tools Quadruple Half-H Drivers


von L293DNE Quadruple Half-H Drivers (Guest)


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The L293 and L293D are high-current quadruple half-H drivers. These 
devices are intended to power a variety of inductive loads, including 
relays, solenoids, DC and bipolar stepping motors, and other 
high-current and high-voltage loads. All inputs are TTL compatible and 
can withstand voltages of up to 7 V. Each output is an entire totem-pole 
drive circuit, complete with a Darlington transistor sink and a 
pseudo-Darlington source. Drivers are enabled in pairs, with 1,2EN 
enabling drivers 1 and 2 and 3,4EN enabling drivers 3 and 4.

...

I have learned L293DNE from this article:

https://www.apogeeweb.net/circuitry/l293dne-quadruple-half-h-drivers-datasheet-arduino-pinout.html

If you get more ideas, please tell me.

von Tilo R (Guest)


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IC from the last century.
Using bipolar darlington as drivers, the IC typically loses 1,4V at the 
highside and 1.2V at the lowside.
If you e.g. want to drive a 12V-Motor, a 12V-Power-supply will result in 
only 9.4V at the motor.

Modern ICs have lower losses and allow for higher currents at comparable 
prices. Additionally, many of them have open-loop detection or 
overcurrent-protection.

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