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MP4688DN-LF-Z

P1-P3P4-P6P7-P9P10-P11
MP4688
80V Input, 1A High
Power LED Driver
MP4688 Rev. 1.2 www.MonolithicPower.com 1
7/15/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP4688 is a high voltage input step-down
switching regulator to deliver a constant current of
up to 1A to high power LEDs. It integrates a high-
side high voltage power MOSFET with a current
limit of 3.2A (typical value). The wide 4.5V to 80V
input range accommodates a variety of step-down
applications, making it ideal for automotive,
industry and general lighting applications.
Hysteresis current mode control is applied for
very fast response, which makes the 20kHz
dimming frequency possible. MPS’s proprietary
feedback control scheme minimizes the number
of external components while delivering a LED
current with typical ±5% accuracy.
The switching frequency is up to 2MHz, thus
allowing for small component size. The thermal
shut down, short circuit protection, and optional
output voltage limitation provide reliable, fault
tolerant operations. A 170µA quiescent current
allows its use in battery-powered applications.
The MP4688 is available in SOIC8 and SOIC8
with exposed pad packages.
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 integrated high
side MOSFET
• Thermal shut down
• 200mV reference voltage for high efficiency
• Up to 95% Efficiency
• 170A Quiescent Current
• Available in SOIC8 and SOIC8 with
Exposed Pad Packages
APPLICATIONS
• High Power LED Driver
• Automotive, Industry and General Lighting
• Constant Current Source
A
ll MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Quality Assurance.
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks o
f
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
MP4688 – 80V INPUT, 1A HIGH POWER LED DRIVER
MP4688 Rev. 1.2 www.MonolithicPower.com 2
7/15/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
ORDERING INFORMATION
Part Number* Package Top Marking Free Air Temperature (T
A
)
MP4688DN SOIC8E MP4688DN
–40°C to +85°C
MP4688DS SOIC8 MP4688DS
–
40°C to +85°C
* For Tape & Reel, add suffix –Z (e.g. MP4688DN–Z);
For RoHS compliant packaging, add suffix –LF (e.g. MP4688DN–LF–Z)
* For Tape & Reel, add suffix –Z (e.g. MP4688DS–Z);
For RoHS compliant packaging, add suffix –LF (e.g. MP4688DS–LF–Z)
PACKAGE REFERENCE
FB
N/C
VIN
BST
GND
EN
DIM
SW
1
2
3
4
8
7
6
5
TOP VIEW
SOIC8E SOIC8
ABSOLUTE MAXIMUM RATINGS
(1)
Supply Voltage (V
IN
) .................... –0.3V to +80V
Switch Voltage (V
SW
) ............ –0.5V to V
IN
+ 0.5V
BST to SW .................................... –0.3V to +6V
All Other Pins ................................ –0.3V to +6V
Junction Temperature .............................. 150°C
Continuous Power Dissipation (T
A
= +25°C)
(2)
SOIC8E (Exposed Pad) ............................. 2.5W
SOIC8 ........................................................ 1.3W
Lead Temperature ................................... 260°C
Storage Temperature .............. –65°C to +150°C
Recommended Operating Conditions
(3)
Supply Voltage V
IN
.......................... 4.5V to 75V
EN and DIM Voltages .......................... 0V to 5V
Operating Junct. Temp. .......... –40°C to +125°C
Thermal Resistance
(4)
θ
JA
θ
JC
SOIC8E (Exposed Pad) .......... 50 ...... 10 ... °C/W
SOIC8 ................................... 96 ...... 45 ... °C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The maximum allowable power dissipation is a function of the
maximum junction temperature T
J
(MAX), the junction-to-
ambient thermal resistance
JA
, and the ambient temperature
T
A
. The maximum allowable continuous power dissipation at
any ambient temperature is calculated by P
D
(MAX)=(T
J
(MAX)-
T
A
)/
JA
. Exceeding the maximum allowable power dissipation
will cause excessive die temperature, and the regulator will go
into thermal shutdown. Internal thermal shutdown circuitry
protects the device from permanent damage.
3) The device is not guaranteed to function outside of its
operating conditions.
4) Measured on JESD51-7 4-layer board.
MP4688 – 80V INPUT, 1A HIGH POWER LED DRIVER
MP4688 Rev. 1.2 www.MonolithicPower.com 3
7/15/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
V
IN
= 60V, T
A
= +25°C, unless otherwise noted.
Specifications over temperature are guaranteed by design and characterization.
Paramete
r
Symbol Condition Min Typ Max Units
VIN UVLO Threshold 3.6 4.0 4.4 V
VIN UVLO Hysteresis 0.4 V
Shutdown Supply Current V
EN
= 0V 2 5 µA
Quiescent Supply Current No load, V
FB
= 250mV 170 220 µA
Upper Switch On Resistance
(
5
)
R
DS
ON
V
BST
– V
SW
= 5V 360 m
Upper Switch Leakage Current I
SWLK
V
EN
= 0V, V
SW
= 0V 0.01 1 µA
Current Limit I
PK
V
FB
= 0.15V 2.5 3.2 A
EN Up Threshold V
ENH
1.4 1.55 1.7 V
EN Threshold Hysteresis V
ENHY
320 mV
EN Input Current I
ENI
V
EN
=5V 0.01 1 µA
EN Sinking Current I
ENS
V
EN
=2V 2 3 µA
DIM Up Threshold V
DIMH
0.8 1.15 1.5 V
DIM Threshold Hysteresis V
DIMHY
300 mV
DIM Input Current I
DIM
V
DIM
=5V or 0V -1 1 µA
DIM On Propagation Delay T
DIMDH
V
FB
=0V, V
DIM
Rising edge to
V
SW
Rising Edge
50 ns
DIM Off Propagation Delay T
DIMDL
V
FB
=0V, V
DIM
Falling edge to
V
SW
Falling Edge
50 ns
Feedback Voltage Threshold High
(5)
V
FBH
4.5V < V
IN
< 75V, V
FB
rising
from 0V until V
SW
< 30V
215 mV
Feedback Voltage Threshold Low
(5)
V
FBL
4.5V < V
IN
< 75V, V
FB
falling
from 0.25V until V
SW
> 30V
185 mV
Feedback Average Voltage V
FB
190 200 210 mV
FB Pin Input Current I
FB
V
FB
=5V or 0V -300 300 nA
FB Propagation Delay to Output
High
T
FBDH
Falling edge of V
FB
from
0.25V to 0V to V
SW
rising
edge
100 ns
FB Propagation Delay to Output
High
T
FBDL
Rising edge of V
FB
from 0V
to
0.25V to V
SW
falling edge
100 ns
Thermal Shutdown
Hysteresis = 20°C
150
°C
Note:
5) Guaranteed by design.
P1-P3P4-P6P7-P9P10-P11

MP4688DN-LF-Z

Mfr. #:
Buy MP4688DN-LF-Z
Manufacturer:
Monolithic Power Systems (MPS)
Description:
LED Lighting Drivers 1A 80V in Buck WLED Driver
Lifecycle:
New from this manufacturer.
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