MP2489 Datasheet, PDF (1/13 Pages) Monolithic Power Systems – Step Down White LED Driver with Wide 6V.60V Input Voltage

The Future of Analog IC Technology
DESCRIPTION
The MP2489 is a high efficiency step-down
converter designed in continuous current mode
for driving the high brightness Light Emitting
Diodes (LED) from wide input voltage 6V–60V.
The MP2489 employs hysteretic control
architecture to regulate a high accuracy LED
current, which is measured through an external
high-side current sensing resistor. Moreover,
this control scheme provides optimized circuit
stabilization and very quick response time
without the loop compensation. Its low 202mV
average feedback voltage reduces power loss
and improves the converter efficiency.
The MP2489 implements PWM and analog
dimming together with DIM pin.
The MP2489 includes thermal overload
protection preventing damage in the event of an
output overload.
The MP2489 is available in small QFN6 (3x
3mm), TSOT23-5 and SOIC8E packages.
MP2489
Step Down White LED Driver with
Wide 6V^–60V Input Voltage
FEATURES
• Internal 65V MOSFET
• Wide 6V to 60V Input Range
• ≥1A Output Current
• High Efficiency (>95%)
• Hysteresis Control
• PWM & Analog Dimming
• 1000:1 PWM Dimming Resolution
• Thermal Shutdown
• Inherent Open LED Protection
• Short LED Protection
• Available in TSOT23-5, QFN6(3x 3mm) and
SOIC8E Packages
APPLICATIONS
• Low Voltage Halogen Replacement
• Low Voltage General Illumination
• Automotive/Decorative LED Lighting
• Signs/Emergency Lighting
• LED Backlighting
All 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 of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
V_IN
C_IN
D1
R_SENSE
IN
RS
MP2489
L1
EN/DIM
GND
SW
MP2489 Rev. 1.23
www.MonolithicPower.com
1
10/11/2012
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