LM3677TL-1.82/NOPB

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PMIC – Voltage Regulators – DC DC Switching Regulators

The LM3677TL-1.82/NOPB integrated circuit (IC) is a high voltage, high switching frequency DC-DC converter used in multiple power management applications. This IC is developed and sold by Texas Instruments. It is equipped with low power consumption components, efficiencies of up to 88%, and a wide input voltage operating range of up to 30V. The LM3677TL-1.82/NOPB provides high efficiency and excellent performance capabilities coupled with a wide range of features. Some of these features include excellent EMI performance, fast transient response, fault protection, and high ripple current handling. The LM3677TL-1.82/NOPB is ideal for various applications such as wearable computing devices, cellular and telecom equipment, RF devices, and networking systems.

Application Field

The DC-DC converter based on the LM3677TL-1.82/NOPB IC can be used in several power management applications. The default configuration of the device is a boosted, buck-boost converter with a 1V to 17V output voltage. This device can be used to power an integrated circuit (IC) from 1V to 17V. The output current of the DC-DC converter can be configured up to 1A. The LM3677TL-1.82/NOPB IC is also capable of operating in a dual supply configuration, which enables the device to drive multiple loads.

The device can be used as a voltage step-up or step-down converter. It can be used to regulate the voltage of a low voltage battery to a higher voltage. The LM3677TL-1.82/NOPB can also be used as a step-down converter to reduce the voltage of an input source to a lower voltage level. The device can also be used as an inverter, generating an output voltage that is opposite in polarity of the input voltage.

The LM3677TL-1.82/NOPB can also be used to perform current limiting, over-voltage/over-temperature protection, and reverse current protection for improved system reliability. The device can be used to power cold cathode fluorescent lamps (CCFL) and LED lamps.

Working Principle

The LM3677TL-1.82/NOPB is a high voltage, high switching frequency DC-DC converter with a low power switch. The device is built on a N-channel buck-boost converter with an adjustable setpoint and fast transient response. The internal LDO regulator is used to generate a low voltage reference voltage for the internal error amplifier.

The voltage regulation of the LM3677TL-1.82/NOPB is based on the working of an error amplifier. The reference voltage is compared with the voltage present at the output feedback pin. The difference between the two voltages is then used to generate a correction signal which is used to control the switching of the device. When the output voltage is below the setpoint, the switch is turned on and the output voltage will increase. When the output voltage exceeds the setpoint, the error amplifier generates a signal to turn off the switch, reducing the output voltage.

The LM3677TL-1.82/NOPB utilizes a high frequency switching mode to achieve a high power efficiency. The device is capable of operating at high switching frequencies up to 2.2MHz for improved efficiency and fast transient response. The high frequency switching also helps to reduce the size of external components such as filters and inductors.

The device also utilizes an internal trans-conductance amplifier to control the output current. The output current is regulated by the setting of the external current limit resistor. This external resistor can be adjusted to set the peak current limit of the device.

The LM3677TL-1.82/NOPB has Integrated Over-Voltage/Over-Temperature and Reverse Current Protection, which prevents malfunctions due to high input voltages and temperature. The device also has a thermal shutdown feature, which disables the device after it reaches a temperature of 150°C.

The LM3677TL-1.82/NOPB is an ideal solution for powering and regulating small electronic devices. The device can be used in applications such as mobile power, high isolation power supplies, and automated test equipment. The device is also suitable for industrial, medical, and automotive applications.

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