RT8482
®
DS8482-02 May 2012 www.richtek.com
1
©
Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Ordering Information
High Voltage High Current LED Driver Controller for Buck
Boost,
or Buck-Boost Topology
Features
zz
zz
z High Voltage Capability : V
IN
Up to 36V, V
OUT
Up to
48V
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z Buck, Boost or Buck-Boost Operation
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zz
z Current Mode PWM with 350kHz Switching
Frequency
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zz
z Easy Dimming : Analog, PWM Digital or PWM
Converting to Analog with One External Capacitor
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zz
z Programmable Soft Start to Avoid Inrush Current
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zz
z Programmable Over Voltage Protection
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z V
IN
Under Voltage Lockout and Thermal Shutdown
zz
zz
z 16-Lead WQFN and SOP Packages
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zz
z RoHS Compliant and Halogen Free
Marking Information
General Description
The RT8482 is a current mode PWM controller designed
to drive an external MOSFET for high current LED
applications. With a current sense amplifier threshold of
190mV, the LED current is programmable with one
external current sense resistor. With a maximum
operating input voltage of 36V and output voltage up to
48V, the RT8482 is ideal for Buck, Boost or Buck-Boost
operation.
With 350kHz operating frequency, the external inductor
and capacitors can be small while maintaining high
efficiency.
Dimming can be either analog or PWM digital. The unique
built-in clamping comparator and filter allow easy low
noise analog dimming conversion from PWM signal with
only one external capacitor.
The RT8482 is available in WQFN-16L 3x3 and
SOP-16 packages.
Applications
z General Industrial High Power LED Lighting
z Desk Lights and Room Lighting
z Building and Street Lighting
z Industrial Display Backlight
RT8482
GSYMDNN
H9=YM
DNN
RT8482GS : Product Number
YMDNN : Date Code
H9= : Product Code
YMDNN : Date Code
RT8482GS
RT8482GQW
RT8482
Package Type
S : SOP-16
QW : WQFN-16L 3x3 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
Richtek products are :
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
` Suitable for use in SnPb or Pb-free soldering processes.
