NCP3066 データシートの表示（PDF） - ON Semiconductor

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NCP3066

Up to 1.5 A Constant Current Switching Regulator for LEDs with ON/OFF Function

ON Semiconductor 

NCP3066, NCV3066

Up to 1.5 A Constant

Current Switching

Regulator for LEDs with

ON/OFF Function

The NCP3066 is a monolithic switching regulator designed to

deliver constant current for powering high brightness LEDs. The

device has a very low feedback voltage of 235 mV (nominal) which is

used to regulate the average current of the LED string. In addition, the

NCP3066 has a wide input voltage up to 40 V to allow it to operate

from a 12 Vac or a 12−36 Vdc supply, commonly used for lighting

applications as well as unregulated supplies such as rechargeable

batteries. The NCP3066 switching regulator can be configured in

Step−Down (Buck), Step−Up (Boost) and Voltage−Inverting

topologies with a minimum number of external components. The

ON/OFF pin provides PWM dimming capability or a low power

shutdown mode.

Features

• Integrated 1.5 A Switch

• Input Voltage Range from 3.0 V to 40 V

• Logic Level Shutdown Capability

• Low Feedback Voltage of 235 mV

• Cycle−by−Cycle Current Limit

• No Control Loop Compensation Required

• Frequency of Operation Adjustable up to 250 kHz

• Analog and Digital PWM Dimming Capability

• Internal Thermal Shutdown with Hysteresis

• NCV Prefix for Automotive and Other Applications Requiring Site

and Control Changes

• These are Pb−Free Devices

Applications

• Automotive and Marine Lighting

• Constant Current Source, High Brightness LED Driver

• Low Voltage and Landscape Lighting

ON/OFF

Rsense

VCC

CIN

GND

Ç ÇÇ ON/OFF

SWC

Ç ÇÇ Ipk

SWE

NCP3066

Ç ÇÇ VCC

CT

ÇÇ ÇÇÇÇ COMP

GND

CT

L1

COUT

D1

Figure 1. Typical Buck Application Circuit

LED+

LED1

LEDn

LED−

Rs

http://onsemi.com

MARKING

DIAGRAMS

8

1

SOIC−8

D SUFFIX

CASE 751

3066

ALYWG

G

1

NCP3066

AWL

YYWWG

8

1

PDIP−8

P, P1 SUFFIX

CASE 626

3066

ALYWG

G

1

DFN8

MN SUFFIX

CASE 488AF

NCP3066

A

L, WL

Y, YY

W, WW

G or G

= Specific Device Code

= Assembly Location

= Wafer Lot

= Year

= Work Week

= Pb−Free Package

(Note: Microdot may be in either location)

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 17 of this data sheet.

© Semiconductor Components Industries, LLC, 2009

1

January, 2009 − Rev. 3

Publication Order Number:

NCP3066/D

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