MP24892 Datasheet, PDF (1/9 Pages) Monolithic Power Systems – Step Down White LED Driver with Wide 6V–45V Input Voltage

The Future of Analog IC Technology
DESCRIPTION
The MP24892 is a high-efficiency step-down
converter that functions in continuous current
mode to drive high-brightness LED. It can take
a wide input voltage range of 6V–45V.
The MP24892 employs a 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 optimal circuit
stabilization and a very quick response time
without loop compensation. Its low 202mV
average feedback voltage reduces power loss
and improves the converter efficiency.
The MP24892 implements PWM and analog
dimming together through the DIM pin.
The MP24892 includes thermal overload
protection that prevents damage in the event of
an output overload.
The MP24892 is available in a small TSOT23-5
package.
MP24892
Step Down White LED Driver
with Wide 6V^–45V Input Voltage
FEATURES
 Wide 6V-to-45V 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 a TSOT23-5 Package
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 the Products, Quality
Assurance page.
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
V_IN
45
D1
C_IN
R_SENSE
IN
RS
MP24892
L1
EN/DIM
GND
SW
MP24892 Rev. 1.0
www.MonolithicPower.com
1
11/3/2011
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