NCP3065SOBSTGEVB ON Semiconductor, NCP3065SOBSTGEVB Datasheet

NCP3065SOBSTGEVB

Manufacturer Part Number

NCP3065SOBSTGEVB

Description

EVAL BOARD FOR NCP3065SOBSTG

Manufacturer

ON Semiconductor

Datasheets

1.NCP3065DR2G.pdf (18 pages)

2.NCP3065SOBSTGEVB.pdf (1 pages)

3.NCP3065SOBSTGEVB.pdf (18 pages)

Specifications of NCP3065SOBSTGEVB

Design Resources

NCP3065 Boost Eval Board BOM NCP3065SOBSTGEVB Gerber Files NCP3065 Boost Eval Board Schematic

Current - Output / Channel

350mA

Outputs And Type

1, Non-Isolated

Voltage - Output

20 V

Voltage - Input

12V

Utilized Ic / Part

NCP3065

Core Chip

NCP3065

Topology

Buck-Boost

No. Of Outputs

Dimming Control Type

PWM

Development Tool Type

Hardware - Eval/Demo Board

Leaded Process Compatible

Yes

Mcu Supported Families

NCP3065

Rohs Compliant

Yes

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Features

Lead Free Status / Rohs Status

Lead free / RoHS Compliant

For Use With/related Products

NCP3065SOBSTG

Other names

NCP3065SOBSTGEVBOS

Current page: 1 of 18
Download datasheet (2Mb)

AND8298

High Intensity LED Drivers

Using NCP3065/NCV3065

Prepared by: Petr Konvicny

ON Semiconductor

have better efficiency and reliability than conventional light

sources. Improvements in high brightness LEDs present the

potential for creative new lighting solutions that offer an

improved lighting experience while reducing energy

demand. LEDs require constant current driver solutions due

to their wide forward voltage variation and steep V/I transfer

function. For applications that are powered from low

voltage AC sources typically used in landscape lighting or

low voltage DC sources that may be used in automotive

applications, high efficiency driver that can operate over

wide range of input voltages to drive series strings of one to

several LEDs.

circuits that can easily be configured to drive LEDs at

several different output currents and can be configured for

either AC or DC input. The NCP3065/NCV3065 can be

configured in a several driver topologies to a drive string of

LEDs: be it traditional low power LEDs or high brightness

high power LEDs such as the Lumileds Luxeon™ K2 and

Rebel series, the CREE XLAMP™ 4550 or XR series, the

April, 2009 − Rev. 1

High brightness LEDs are a prominent source of light and

This application note describes a DC−DC converter

NCP/NCV3065 Demo Board

Figure 1. Buck Demo Board

Introduction

OSRAM OSTAR™, TopLED™ and Golden Dragon™.

Configurations like this are found in 12 V

applications, automotive applications, and low voltage AC

landscaping applications as well as track lighting such as

under−cabinet lights and desk lamps that might be powered

from standard off−the−shelf 5 V

adapters. The NCP3065/NCV3065 can operate as a switcher

or as a controller. These options are shown bellow.

in Lumens and is proportional to the forward current flowing

through the LED. The light efficiency can vary with the

current flowing through the LED string.

temperature ranges and the NCV3065 is automotive

qualified.

Demo Board Design Versions

functionality and flexibility of NCP3065 as a driver to drive

various LEDs at the low voltage AC and DC sources. The

components are selected for the 15 W LED driver

application. Based on this circuit, there are many possible

configurations with different input voltages and output

power levels that could be derived by making some minor

components changes. Table 1 shows these different circuit

solutions. Each application is described by the schematic

and the bill of material and it has the option of LED dimming

by using an external PWM signal.

Inductor

inductor size and peak current. In normal applications the

ripple current can range from 15% to 100%. The trade off

being that with small ripple current the inductance value

increases. The advantage is that you can maximize the

current out of the switching regulator.

With Output Capacitor Operation

by an output capacitor which filters the ripple. The capacitor

is placed in parallel with the LED or array of LEDs to lower

LED ripple current. With this approach the output

inductance can be reduced which makes the inductance

The brightness of the LEDs or light intensity is measured

The NCP3065 is rated for commercial/industrial

The demo boards are designed to display the full

When selecting an inductor there is a trade off between

A traditional buck topology includes an inductor followed

Component Selection

http://onsemi.com

Publication Order Number:

and 12 V

track lighting

AND8298/D

wall

Related parts for NCP3065SOBSTGEVB

NCP3065SOBSTGEVB Summary of contents

Page 1

... AND8298 High Intensity LED Drivers Using NCP3065/NCV3065 Prepared by: Petr Konvicny ON Semiconductor Introduction High brightness LEDs are a prominent source of light and have better efficiency and reliability than conventional light sources. Improvements in high brightness LEDs present the potential for creative new lighting solutions that offer an improved lighting experience while reducing energy demand ...

Page 2

Alternatively, the circuit could be run at lower frequency with the same inductor value which improves the efficiency and expands the output voltage range. Equation 2 is used to calculate the capacitor size based on the ...

Page 3

Table 1. COMPONENTS CHANGES FOR DIFFERENT CONFIGURATIONS LED Driver Application LED LED LED LED LED DC ...

Page 4

R1 J2 0R10 +VIN + C2 J3 GND J5 R11 Q2 BC817−LT1G R10 ON/OFF 1k2 R9 10k 1k 0805 Figure 3. NCP3065 Dimming Solution 0R10 +VIN 10k + C2 J3 GND J5 R11 Q2 BC817−LT1G R10 ...

Page 5

The layout of the evaluation board and schematic is shown below in Figure 6 and Figure 7. Figure 6. Demo board layout Top (Not in Scale) BOARD LAYOUT Figure 7. Demo Board Silk Screen Top http://onsemi.com 5 ...

Page 6

Figure and 24 V Input LED Driver Schematic DC DC http://onsemi.com 6 ...

Page 7

Figure 9. Schematic NCP3065 as Switcher in the AC Input LED Driver Application http://onsemi.com 7 ...

Page 8

... SOIC8 SMD Mfg Package Mtg 1206 SMD Panasonic G, 10x10.2 SMD 0805 SMD 0805 SMD Panasonic F, 8x10.2 SMD ON Semiconductor SMB SMD ON Semiconductor SOD123 SMD Coilcraft SMD ON Semiconductor SOT223 SMD ON Semiconductor SOT23 SMD 2010 SMD 0805 SMD 0805 SMD 0805 SMD 0805 SMD ...

Page 9

... Without Output Cap Mfg P/N EEEVFK1H221P MBRS240LT3G ON Semiconductor MMSD4148T1G ON Semiconductor DO3340P−154MLD NTF2955T1G ON Semiconductor MMBT3904LT1G ON Semiconductor NCP3065 ON Semiconductor Mfg P/N EEEVFK1H221P EEEVFK1H101P MBRS240LT3G ON Semiconductor MMSD4148T1G ON Semiconductor DO3316P−473MLD NTF2955T1G ON Semiconductor MMBT3904LT1G ON Semiconductor NCP3065 ON Semiconductor Result 76% 76% $5% < < http://onsemi.com 9 Mfg Package Mtg 1206 ...

Page 10

Page 11

V (V) IN Figure 10. Current Regulation LED Driver 1150 1100 1050 1000 950 900 850 (V) ...

Page 12

Figure 14 350 mA Input Inductor Ripple Without Output Capacitor, C1 Inductor Input, C4 Inductor DC OUT Table 11. BUCK EFFICIENCY RESULTS FOR DIFFERENT RIPPLE WITH NO OUTPUT CAPACITOR Efficiency ...

Page 13

Figure 15. NCP3065 Behavior with Dimming, Frequency is 200 Hz, Duty Cycle 50% 800 700 600 500 400 300 200 100 0 0 Figure 17. Output Current Dependency on the Dimming Duty Cycle Pulse feedback design The NCP3065 is a ...

Page 14

Oscillator Current Comparator LED V ref V SENSE Switching Waveform Without Pulse Figure 19. Feedback Figure 20. Switching Waveform With Pulse Feedback Output from Peak + − Figure 18. Burst−Mode Architecture Figures 19 and 20 show the effect of the ...

Page 15

Figure 22 Input LED Driver Schematic DC http://onsemi.com 15 ...

Page 16

When operating in CCM the output voltage is equal OUT The duty cycle is defined OFF The ...

Page 17

... V (V) IN Output Current 350 mA Mfg Package Panasonic F, 8x10.2 1206 Panasonic G, 10x10.2 0805 ON Semiconductor SMB ON Semiconductor SOD123 Coilcraft ON Semiconductor SOT23 2010 0805 1206 0805 ON Semiconductor SOIC8 20 22 Mtg SMD SMD SMD SMD SMD SMD SMD SMD SMD SMD SMD SMD SMD ...

Page 18

... Email: orderlit@onsemi.com for a variety of constant current buck and boost LED driver applications. In addition there is an EXCEL tool at the ON Semiconductor website for calculating inductor and other passive components if the design requirements differ from the specific application voltages and currents illustrated in these example. ...

Related keywords

ncp3065
ncp3066
ncp3065sobstgevb
ncp3065sobckgevb
ncp3065d1sldgevb
NCP3065SOBSTGEVB datasheet
NCP3065SOBSTGEVB data sheet
NCP3065SOBSTGEVB pdf datasheet
NCP3065SOBSTGEVB component
NCP3065SOBSTGEVB part
NCP3065SOBSTGEVB distributor
NCP3065SOBSTGEVB RoHS
NCP3065SOBSTGEVB datasheet download