The following are the pin function parameters of the common version of the XL2576S chip:
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1. Vin Input positive power supply voltage.
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2. GND ground.
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3. VFB feedback pin for output voltage setting.
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4. Vout outputs the positive power supply voltage.
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5. Compensation pins are used to connect the compensation network.
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6. SS synchronous oscillator pin, used to connect synchronous oscillation circuit.
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7. The ENable pin is used to control the on\/off status of the chip.
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8. Iadj control pin for adjusting output current.
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Among them, Vin, GND, Vout three pins are the basic power supply pins of the chip, VFB and Compensation pins are used to accurately control the output voltage, SS pins are used to achieve synchronous rectification, ENable and Iadj pins are used to control the working state and output current of the chip.
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2. The input terminal includes VIN and GND pins. VIN is the positive terminal of the input power supply, while GND is the negative terminal of the input power supply.
The output end includes VOUT, SW and GND pins, where VOUT is the positive output end, SW is the control pin of the internal switch tube, and GND is the negative output pole.
In addition, there are EN, FB, COMP and other pins. 3, in the design and use, it is necessary to understand the function and parameters of each pin in detail in order to make the XL2576S better performance and more stable work.
For example, by controlling the EN (enable) pin, the output control of the switching power supply can be realized; Through the connection of VOUT and FB (feedback) pins, the output voltage of the power supply can be precisely adjusted.
The xl2576s pin function parameters are as follows:
The lm2576s comes in two main packages with five pins. The functions of the pin are as follows:
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1-Vin: Output power supply voltage, this pin must be connected to a suitable input bypass capacitor to minimize voltage transients and provide the required switching current to the IC.
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2-Output: indicates the switch output
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3-Ground: indicates the IC grounding terminal
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4-Feedback: Output voltage feedback
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5-ON \/OFF: The switch pin of the IC, generally grounded to make the regulator in the open state, if the voltage is higher than 1.3V, it will close the regulator and make it stop working.