MP2487 Datasheet, PDF (1/13 Pages) Monolithic Power Systems – 55V, 1A High Power LED Driver

The Future of Analog IC Technology
DESCRIPTION
The MP2487 is a fixed frequency 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 1.5A. The wide 4.5V to 55V input
range accommodates a variety of step-down
applications, making it ideal for automotive,
industry and general lighting applications. Peak
current mode control and 200mV reference are
applied for fast loop response, easy
compensation and accurate LED current
regulation. The switching frequency is
programmable with an external resistor up to
200kHz, which can prevent EMI
(Electromagnetic Interference) noise problems.
The thermal shut down provides reliable, fault
tolerant operations. A 12µA quiescent current in
shutdown mode allows its use in battery-
powered applications.
The MP2487 is available in a SOIC8E package.
MP2487
55V, 1A
High Power LED Driver
FEATURES
• Wide 4.5V to 55V Operating Input Range
• 220mΩ Internal Power MOSFET
• Up to 200kHz Programmable Switching
Frequency
• 130μA Quiescent Current
• Ceramic Capacitor Stable
• Internal Soft-Start
• Up to 97.5% Efficiency
• 200mV Reference Voltage for High
Efficiency
• Available in a SOIC8E Package
APPLICATIONS
• High Power LED Driver
• Automotive, and General Lighting
• Constant Source
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TYPICAL APPLICATION
CCOM2
R_COM CCOM1
CONTROL
RFREQ
CFREQ _LED-
RFB
COMP
VIN
MP2487
EN
BST
FREQ
SW
FB
GND
CIN
CBST
D1
L1
COUT
V_IN
8V to 55V
LED+
Efficiency vs. Input Voltage
10 WLED@330mA
100
98
96
94
92
90
30 35 40 45 50 55 60
INPUT VOLTAGE(V)
MP2487 Rev. 1.0
www.MonolithicPower.com
1
9/22/2011
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