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PDF MP4688 Data sheet ( Hoja de datos )
| Número de pieza | MP4688 | |
| Descripción | Power LED Driver | |
| Fabricantes | MPS | |
| Logotipo |  |
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MP4688
The Future of Analog IC Technology
DESCRIPTION
The MP4 688 is a h igh voltage input st ep-down
switching regulator to deliver a constant current of
up to 1A to high power LEDs. It integrates a high-
side h igh voltag e power MOSFET w ith a current
limit of 3.2A (typical value). The wide 4.5V to 80V
input range accommodates a variety of step-down
applications, makin g it id eal for au tomotive,
industry a nd gen eral lighting app lications.
Hysteresis curre nt mod e con trol is applied f or
very fas t r esponse, whi ch m akes the 2 0kHz
dimming frequency po ssible. MPS’s pr oprietary
feedback control sch eme minimize s th e number
of e xternal components whi le d elivering a L ED
current with typical ±5% accuracy.
The sw itching frequency is up to 2MHz, th us
allowing f or small comp onent size. The t hermal
shut down, sho rt cir cuit prot ection, a nd optional
output volta ge limitation pr ovide r eliable, f ault
tolerant o perations. A 1 70µA quiescent curre nt
allows its use in battery-powered applications.
The MP468 8 is ava ilable in SOIC 8 an d SOIC 8
with exposed pad packages.
80V Input, 1A High
Power LED Driver
FEATURES
• Wide 4.5V to 80V Operating Input Range
• No Output Capacitor Required
• ±5% LED Current Accuracy
• Hysteretic Control: No Compensation
• Up to 2MHz Switching Frequency
• Up to 20kHz Dimming Frequency
• Dedicated PWM Dimming Control Input
• Short circuit protection with integrat ed high
side MOSFET
• Optional Output Voltage Limitation
• Thermal shut down
• 200mV reference voltage for high efficiency
• Up to 95% Efficiency
• 170 μA Quiescent Current
• Available in SOIC8 and SOI C8 with
Exposed Pad Packages
APPLICATIONS
• High Power LED Driver
• Automotive, Industry and General Lighting
• Constant Current Source
All MPS parts are lead-free and adhere to t he RoHS directive. F or MPS green
status, please visit M PS website u nder Q uality Assurance. “MPS” and “ The
Future of An alog IC Technology” a re Re gistered T rademarks of Mo nolithic
Power Systems, Inc.
TYPICAL APPLICATION
MP4688 Rev. 1.12
www.MonolithicPower.com
3/28/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
1
http://www.Datasheet4U.com
1 page  
BLOCK DIAGRAM
MP4688 – 80V INPUT, 1A HIGH POWER LED DRIVER
Figure 1—Function Block Diagram
MP4688 Rev. 1.12
www.MonolithicPower.com
3/28/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
5
5 Page 
0.189(4.80)
0.197(5.00)
85
PIN 1 ID
MP4688 – 80V INPUT, 1A HIGH POWER LED DRIVER
SOIC8
0.024(0.61)
0.063(1.60)
0.050(1.27)
0.150(3.80)
0.157(4.00)
0.228(5.80)
0.244(6.20)
0.213(5.40)
14
TOP VIEW
RECOMMENDED LAND PATTERN
0.013(0.33)
0.020(0.51)
0.053(1.35)
0.069(1.75)
SEATING PLANE
0.004(0.10)
0.010(0.25)
0.050(1.27)
BSC
FRONT VIEW
SEE DETAIL "A"
SIDE VIEW
0.0075(0.19)
0.0098(0.25)
GAUGE PLANE
0.010(0.25) BSC
0.010(0.25)
0.020(0.50)
x 45o
0o-8o
0.016(0.41)
0.050(1.27)
DETAIL "A"
NOTE:
1) CONTROL DIMENSION IS IN INCHES. DIMENSION IN
BRACKET IS IN MILLIMETERS.
2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH,
PROTRUSIONS OR GATE BURRS.
3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH
OR PROTRUSIONS.
4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING)
SHALL BE 0.004" INCHES MAX.
5) DRAWING CONFORMS TO JEDEC MS-012, VARIATION AA.
6) DRAWING IS NOT TO SCALE.
NOTICE: The information in this docum ent is subject to chang e without notice. Users sh ould warrant and guarantee that third
party Int ellectual Prop erty r ights are n ot inf ringed u pon when i ntegrating MPS product s into any application. MPS w ill not
assume any legal responsibility for any said applications.
MP4688 Rev. 1.12
www.MonolithicPower.com
3/28/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet MP4688.PDF ] | |
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