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Key Parameters and Features of NTR4171PT1G:
- NTR4171PT1G is a voltage regulator IC.
- It has a wide input voltage range of operation.
- It provides high efficiency voltage regulation.
- It provides output voltage adjustment capabilities.
- Designed for low dropout voltage, minimizing power loss.
Application Scenario: Mobile Phone Battery Charging
In this scenario, we will use the NTR4171PT1G voltage regulator in a circuit to charge a mobile phone battery from a USB power source.
Circuit Connection:
- Connect the Input Voltage (Vin) of the NTR4171PT1G to the USB power source (typically 5V).
- Connect the Ground (GND) of the NTR4171PT1G to the ground reference (0V).
- Connect the Output Voltage (Vout) of the NTR4171PT1G to the mobile phone battery.
- Connect a decoupling capacitor (C1) between the Vin and GND pins of the voltage regulator to stabilize the input voltage.
- To filter and stabilize the output voltage, connect an output capacitor (C2) between the voltage regulator's Vout and GND pins.
- Connect a feedback resistor divider (R1 and R2) between Vout and GND to set the desired output voltage. The values of R1 and R2 can be chosen to determine the output voltage using the voltage divider formula.
- Connect a current-limiting resistor (R3) in series with Vin if necessary, to limit the input current.
- Connect an enable pin (EN) of the voltage regulator to a control signal, typically from a microcontroller or a switch, to enable or disable the regulator as needed.
Considerations for Circuit Design:
1. Output Voltage: Set the feedback resistor divider (R1 and R2) to achieve the desired output voltage compatible with the mobile phone battery's charging requirements.
2. Input Voltage: Ensure that the input voltage (Vin) is within the acceptable range of the NTR4171PT1G.
3. Input Current Limit: Implement current limiting if required to protect the USB power source.
4. Output Capacitor: To filter and stabilize the output voltage, use the proper capacitance value for C2.
5. Enable Control: Use the enable pin (EN) to control when the regulator should be active, for example, to enable charging only when needed.
By addressing these considerations and designing the circuit accordingly, you can effectively charge a mobile phone battery from a USB power source using the NTR4171PT1G voltage regulator, ensuring stable and regulated charging voltage.
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