STEVAL-ILL008V1 STMicroelectronics, STEVAL-ILL008V1 Datasheet

STEVAL-ILL008V1

Manufacturer Part Number

STEVAL-ILL008V1

Description

EVAL BOARD CREE LED FLASHLIGHT

Manufacturer

STMicroelectronics

Datasheets

1.L6920DC.pdf (13 pages)

2.STEVAL-ILL008V1.pdf (4 pages)

3.STEVAL-ILL008V1.pdf (15 pages)

Specifications of STEVAL-ILL008V1

Mfg Application Notes

Low Voltage LED Driver AppNote

Design Resources

STEVAL-ILL008V1 Gerber Files STEVAL-ILL008V1 Schematic STEVAL-ILL008V1 Bill of Materials

Outputs And Type

1, Non-Isolated

Voltage - Output

3.5V

Features

1V Start up Input Voltage

Voltage - Input

1 ~ 5.5 V

Utilized Ic / Part

L6920

Product

Display Modules

Core Chip

L6920DA

Output Voltage

3.5V

Kit Contents

L6920D, L4971, L6902D Reference Board

Development Tool Type

Hardware - Eval/Demo Board

Tool / Board Applications

LED Flashlight

Mcu Supported Families

L6920DA

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Current - Output / Channel

Lead Free Status / Rohs Status

Details

Other names

497-5516

Current page: 1 of 4
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Features

■

Description

White LEDs are gaining popularity as sources of

illumination due to their high efficiency and

reliability.

Typical forward voltage drop across a white LED

is approximately 3.5 V. When these LEDs are

powered from a single or two cell batteries, a

boost converter is needed to boost the voltage to

drive the LEDs.

This evaluation board, based on the L6920DA,

implements a high efficiency step-up converter

which requires very few passive components to

perform the conversion from the battery voltage to

the selected output voltage or current. Startup is

guaranteed at 1 V and the device operates down

to 0.6 V. The device has a very low quiescent

current of only 10 µA.

An internal synchronous rectifier is implemented

with a 120 mΩ P-channel MOSFET, replacing the

conventional boost diode, to improve efficiency.

This also could reduce the cost of the application

since no external diode required.

March 2008

For further information contact your local STMicroelectronics sales office.

High efficiency step-up converter

Powered from two cell batteries

Output voltage V

Minimum operating input voltage V

LED flashlight evaluation board based on the L6920DA

out

= 3.5 V

= 1 V

Rev 1

STEVAL-ILL008V1

Data Brief

www.st.com

1/4

Related parts for STEVAL-ILL008V1

STEVAL-ILL008V1 Summary of contents

Page 1

... P-channel MOSFET, replacing the conventional boost diode, to improve efficiency. This also could reduce the cost of the application since no external diode required. March 2008 For further information contact your local STMicroelectronics sales office. STEVAL-ILL008V1 = Rev 1 Data Brief STEVAL-ILL008V1 www.st.com 1/4 4 ...

Page 2

... Circuit schematic 1 Circuit schematic Figure 1. Schematic 2 STEVAL-ILL008V1 ...

Page 3

... STEVAL-ILL008V1 2 Revision history Table 1. Document revision history Date 27-Feb-2008 Revision 1 Initial release. Revision history Changes 3/4 ...

Page 4

... Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 4/4 Please Read Carefully: © 2008 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com STEVAL-ILL008V1 ...

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