MP4689
100V Input, 1A High
Power LED Driver
The Future of Analog IC Technology
DESCRIPTION
The MP4689 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 2.5A (typical value). The wide
4.5V to 100V input range accommodates a
variety of step-down applications, making it
ideal for automotive, industrial 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 ±3%
accuracy.
The switching frequency is up to 1MHz, 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 MP4689 is available in SOIC8 with
exposed pad packages.
FEATURES
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Wide 4.5V to 100V Operating Input Range
No Output Capacitor Required
±3% LED Current Accuracy
Hysteretic Control: No Compensation
Up to 1MHz Switching Frequency
Up to 20kHz Dimming Frequency
Dedicated PWM Dimming Control Input
Short circuit protection with integrated high
side MOSFET
Optional Output Voltage Limitation
Thermal shut down
200mV reference voltage for high efficiency
Up to 95% Efficiency
170µA Quiescent Current
Available in SOIC8 with Exposed Pad
Packages
High Power LED Driver
Automotive, Industry and General Lighting
Constant Current Source
APPLICATIONS
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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
PWM
Enable
DIM
EN
FB
VIN
BST
SW
D1
GND
C
BST
C
IN
V
OUT
V
IN
4.5V to 100V
L
O
MP4689 Rev. 1.0
4/29/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
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MPS [ MONOLITHIC POWER SYSTEMS ]
