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Audio Amplifiers: Totem pole configurations can also be found in audio amplifier circuits to drive speakers or headphones.It enables precise dimming and switching functionality while maintaining efficient power consumption.

LED and Lighting Applications: Totem pole circuits are utilized in LED drivers and lighting systems to control the current flowing through the LEDs.

Microcontrollers and Digital Logic: When microcontrollers or digital logic devices need to drive high-power loads such as motors or relays, the totem pole configuration is used to provide the necessary voltage level shifting and current sinking capabilities.

They help in efficiently driving the high-side and low-side switches, ensuring proper voltage conversion and feedback control. Switching Power Supplies: Totem pole circuits are employed in switching power supply designs to generate regulated voltages.By driving the gates of power transistors, it allows for efficient control and switching of power devices. Power Electronics: The totem pole configuration is widely used in power electronics applications, such as inverter circuits and motor control.Some of the notable applications of totem pole circuits include: If you want more discussion then please refer to the other two posts here I've made on the topic: (1) TTL Inverter and also (2) TTL AND.The totem pole configuration is commonly used in various applications that require converting voltage levels and driving loads efficiently. (Just look at the base current into \$Q_2\$.) And it can sink a fair amount of it, in fact. In this state, the output cannot source any current. Then verify that you also agree with me about the equivalent circuit on the right. once again:įirst, look at the circuit on the left side and make sure that you agree with me about which BJTs are on and which are off. I've also included the equivalent resulting circuit on the right side. I've added some details about how \$IN\$ is actually driven in a real circuit as well as a few short notes here and there, once again. Here is the schematic in the case where the output is LO. The drive will typically either be holding \$IN\$ close to ground (with output HI) so that \$Q_3\$ is OFF or else by sourcing a current of about \$700\:\mu\text\approx 12\$. The first thing to understand how the input (labeled \$IN\$ in the schematic) is actually driven. I've added the typical resistor values for TTL here, as well. Simulate this circuit – Schematic created using CircuitLab

It's helpful to do so, despite having a "nice picture." If for no other reason, it allows others to quickly snap up and use your schematic as a starting point for adding additional notes. Draw out the schematic using the existing schematic editor that you have access to when writing out your question.