Rainbow Electronics MAX16841 - Manual

MAX16841
Controller IC for Dimmable Offline LED Lamps
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19-6028; Rev 0; 10/11
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part,
refer to
www.maxim-ic.com/MAX16841.related .
Typical Operating Circuits appear at end of data sheet.
E V A L U A T I O N K I T A V A I L A B L E
General Description
The MAX16841 is an LED driver for AC line (100V, 120V,
220V, and 230V AC) input lamps. It features proprietary
control of the input current that allows lamps to dim
smoothly from full to zero light intensity, while providing
active power factor correction (PFC). It is a very flexible
product that can be used in isolated (e.g., flyback) and
nonisolated (e.g., buck) configurations. The conventional
use of an optocoupler in isolated configurations can be
avoided in MAX16841-based designs.
The constant frequency-control technique of the
device allows maximization of the conversion efficien-
cy at both low and high AC line by operating at the
conduction mode that minimizes total conduction and
switching losses.
The device can be configured for universal input (90V to
264V AC) dimmable applications, allowing the design of an
LED lamp that can be operated and dimmed worldwide.
This device can be used without electrolytic capacitors,
thus maximizing the lamp lifetime. In this case, the LED
current is a rectified sinusoid with a frequency that is
twice the AC line frequency.
The device also features thermal shutdown, current limit,
open LED protection, and V
CC
undervoltage lockout.
The MAX16841 is available in an 8-pin SO package and
operates over the -40NC to +125NC temperature range.
Applications
Retrofit LED Lamps with Triac Dimming
Universal Input LED Retrofit Lamps
Industrial and Commercial Lighting
Residential LED Lighting
Features
S Smooth Dimming with Leading-Edge (Triac) and
Trailing-Edge Dimmers
S Active Power Factor Correction
S Nonisolated (e.g., Buck) and Isolated
(e.g., Flyback) Topologies
S Universal 90V to 264V AC Input Range
S Constant Frequency-Control Scheme Maximizes
Efficiency at High and Low AC Line Voltage
S Constant Power Control with No Need for
Optocouplers
S Very-Low Quiescent Current
S Output Open and Short Protection
S Thermal Shutdown
S Available in an 8-Pin SO Package
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.