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PDF MP4690 Data sheet ( Hoja de datos )
| Número de pieza | MP4690 | |
| Descripción | Smart Bypass | |
| Fabricantes | MPS | |
| Logotipo |  |
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The Future of Analog IC Technology
DESCRIPTION
The MP4690 is a MOSFET based smart bypass
for LED open protection, which provides a current
bypass in the case of a single LED fa ils and
becomes a n op en circuit. W hen th e LED h eals
itself or is r eplaced, the MP469 0 automatically
resets. This device fea tures very low voltage
drop so that the conduction loss is very s mall
during the protection. It achieves excellen t
thermal performance and energy efficiency.
LED lighting requires high reliability, especia lly
in applicat ions, such a s automobiles, aircrafts,
and streetlights. The MP4690 is use d in parallel
with each LED so tha t when one LED fails,
other LEDs in the same string can still function
normally.
The usage of the MP4690 is not limited to just
LED loads. It can also be used with other loads
where open protection is required.
The MP46 90 is typically used with 1W-2W.
LEDs. The device is available in a SOD12 3
package.
MP4690
Smart Bypass For
LED Open Protection
FEATURES
Simple Two Terminal Device
Automatic Reset if the LED Heals itself or is
Replaced
0.22 Ω Typical On-state Resistance
Less than 1µA Off-state Current
Available in SOD123 Package
APPLICATIONS
LEDs where Preventive Maintenance is not
Practical
LED Headlights
LEDs with high Reliability Requirements
Crowbar Protection for Open Circuit
Conditions
Over-voltage Protection for Sensitive
Circuits
For MPS green status, please visit MPS website under Quality Assurance.
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
Drain
Control
Circuit
Source
MP4690 Rev. 1.0
7/7/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
1
http://www.Datasheet4U.com
1 page  
MP4690 – SMART BYPASS FOR LED OPEN PROTECTION
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
ILED=700mA, TA=+25°C, unless otherwise noted.
Steady State of No
LED Open
Steady State of LED
Open Circuit
Zoom In Steady State
Waveform
VDS
2V/div.
ILED
500mA/div.
VDS
2V/div.
ILED
500mA/div.
VDS
2V/div.
ILED
500mA/div.
Open Protection Entry
Protection Exit when
LED Heals
PWM Dimming at Small Duty
Cycle with one LED Open
Fs=1kHz, D=10%
VDS
2V/div.
ILED
500mA/div.
VDS
2V/div.
ILED
500mA/div.
PWM Dimming at Large Duty
Cycle with one LED Open
Fs=1kHz, D=90%
VDS
2V/div.
ILED
500mA/div.
VDS
2V/div.
ILED
500mA/div.
MP4690 Rev. 1.0
7/7/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
5
5 Page 
MP4690 – SMART BYPASS FOR LED OPEN PROTECTION
PACKAGE INFORMATION
SOD123
TOP VIEW
RECOMMENDED LAND PATTERN
FRONT VIEW
SEATING PLANE
SEE DETAIL ''A''
SIDE VIEW
DETAIL ''A''
NOTE:
1) ALL DIMENSIONS ARE IN MILLIMETERS.
2) PACKAGE LENGTH DOES NOT INCLUDE MOLD
FLASH, PROTRUSION OR GATE BURR.
3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD
FLASH OR PROTRUSION.
4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER
FORMING) SHALL BE 0.10 MILLIMETERS MAX.
5) DRAWING CONFORMS TO JEDEC DO-219.
6) DRAWING IS NOT TO SCALE.
NOTICE: The information in this document is subject to change without notice. Users should warrant and guarantee that third
party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not
assume any legal responsibility for any said applications.
MP4690 Rev. 1.0
7/7/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
11
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| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet MP4690.PDF ] | |
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