EV24894-J-00A
Step-Down WLED-Curernt Controller
Evaluation Board
EV24894-J-00A Rev. 1.01 www.MonolithicPower.com 1
2/20/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The EV24894-J-00A is an evaluation board for
the MP24894GJ, a high-efficiency step-down
controller. It is designed to function in
continuous current mode to power LEDs of
high-brightness with a wide input voltage range
of 6V to 60V.
The MP24894 employs a hysteretic control
architecture that accurately regulates LED
current; with a feedback coming from an
external high-side current-sensing resistor. This
control scheme optimizes circuit stabilization
and fast response time without loop
compensation. Its low 200mV average
feedback voltage reduces power loss and
improves the converter’s efficiency.
The MP24894 implements PWM and analog
dimming together through the EN/DIM pin.
The MP24894 includes thermal overload
protection in the case of output overload.
ELECTRICAL SPECIFICATIONS
Parameter Symbol Value Units
Input
Voltage
V
IN
6 –60 V
Output
Voltage
V
OUT
<V
IN
LED Current I
LED
1 A
FEATURES
• Wide 6V to 60V Input Range
• Able to Drive >1A LED Current
• High Efficiency (>95%)
• Hysteresis Control
• 2500:1 PWM Dimming Resolution
• Thermal Shutdown
• Integrated Open LED Protection
• Short LED Protection
• Available in TSOT6 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 Monolithi
Power Systems, Inc.
