TL2844BP

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TL2844BP is a DC DC switching controller designed specifically for precision current limiting and pulse-by-pulse current regulating applications. It offers superior efficiency, small size and accuracy, making it ideal for small, space-limited applications. TL2844BP can drive synchronous rectifiers and low drop-out linear regulators. It is suitable for synchronous buck, step-down and step-up/down converter applications.

TL2844BP is current-mode device with a fixed oscillator frequency of 200kHz, and it can be easily configured for current-mode, voltage-mode and hysteretic control. It integrates an output voltage controlled oscillator, a fixed frequency oscillator, comparator, D flip-flop, transconductance current source and low side driver for driving external switch.The main features of TL2844BP include:

• High efficiency synchroonous buck converter
• Low current consumption < 20uA
• Pulse-by-pulse current limiting and short circuit protection
• Voltage mode, current mode and hysteretic control
• Soft start and adjustable oscillator frequency
• No external compensation required
• Integrated diode emulation

The basic working principle of TL2844BP is based on the concept of current-mode control. This is because the current mode control has fast response and can protect against short-circuits. It is also capable of generating current limiting. The output voltage is sensed by the internal voltage controlled oscillator and the current is sensed using the external sense resistor. The current is compared with the programmed current limit level and when the current reaches the limit or exceeds it, an external switch is turned off and the output voltage is regulated.

TL2844BP is mainly used for applications such as DC/DC voltage regulator, DC/DC converters, switched-mode power supply, DC/AC inverters, VRMs and other switch mode power supplies. It provides high efficiency, small size and low cost, making it suitable for low power applications. It can be used in a wide range of applications and offers excellent performance, better accuracy and efficiency.

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