NCP3063/NCP363B/NCV3063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.