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关键字：NCP3063/NCP363B/NCV3063电源变换芯片介绍
NCP3063/NCP363B/NCV3063
1.5 A, Step-Up/Down/Inverting Switching Regulators
The NCP3063 Series is a higher frequency upgrade to the popular MC34063A and MC33063A monolithic DC-DC converters. These devices consist of an internal temperature compensated reference, comparator, a controlled duty cycle oscillator with an active current limit circuit, a driver and a high current output switch. This series was specifically designed to be incorporated in Step-Down, Step-Up and Voltage-Inverting applications with a minimum number of external components.
Features特点
•_Operation to 40 V Input
•_Low Standby Current
•_Output Switch Current to 1.5 A
•_Output Voltage Adjustable
•_Frequency Operation of 150 kHz
•_Precision 1.5% Reference
•_New Features: Internal Thermal Shutdown with Hysteresis Cycle-by-Cycle Current Limiting
•_Pb-Free Packages are Available
Applications应用
•_Step-Down, Step-Up and Inverting supply applications
•_High Power LED Lighting
•_Battery Chargers
PIN DESCRIPTION管脚介绍
|
Pin No. |
Pin Name |
Description |
|
1 |
Switch Collector |
Internal Darlington switch collector |
|
2 |
Switch Emitter |
Internal Darlington switch emitter |
|
3 |
Timing Capacitor Oscillator Input |
Timing Capacitor |
|
4 |
GND |
Ground pin for all internal circuits |
|
5 |
Comparator Inverting Input |
Inverting input pin of internal comparator |
|
6 |
VCC |
Voltage Supply |
|
7 |
Ipk Sense |
Peak Current Sense Input to monitor the voltage drop across an external resistor to limit the peak current through the circuit |
|
8 |
N.C. |
Pin Not Connected |
|
Exposed Pad |
Exposed Pad |
The exposed pad beneath the package must be connected to GND (Pin 4). Additionally, using proper layout techniques, the exposed pad can greatly enhance the power dissipation capabilities of the NCP3063. |
应用电路：
降压应用电路，输入12V，输出3.3V/0.8A
升压应用电路:输入12V,输出24V/0.35A
电压反转电路,输入5V,输出-12V/0.1A
场效应管扩流升压电路,输入8-18V,输出31V/0.35A
场效应管扩流降压电路,输入8-19V,输出3.3V/3A
三极管扩流降压应用电路,输入8-19V,输出3.3V/1A
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