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MAX16801B

Description
Offline and DC-DC PWM Controllers for High-Brightness LED Drivers
File Size203KB,16 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
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MAX16801B Overview

Offline and DC-DC PWM Controllers for High-Brightness LED Drivers

19-3880; Rev 2; 1/10
KIT
ATION
EVALU
BLE
AVAILA
Offline and DC-DC PWM Controllers for
High-Brightness LED Drivers
General Description
Features
Suitable for Buck, Boost, Flyback, SEPIC, and
Other Topologies
Up to 50W or Higher Output Power
Universal Offline Input Voltage Range: Rectified
85VAC to 265VAC (MAX16801)
IN Pin Directly Driven From 10.8VDC to 24VDC
Input (MAX16802)
Internal Error Amplifier with 1% Accurate
Reference for Precise LED Current Regulation
PWM or Linear Dimming
Fixed Switching Frequency of 262kHz ±12%
Thermal Shutdown
Digital Soft-Start
Programmable Input Startup Voltage
Internal Bootstrap UVLO with Large Hysteresis
(MAX16801)
45µA (typ) Startup Supply Current, 1.4mA (typ)
Operating Supply Current
50% (MAX16801A/MAX16802A) or 75%
(MAX16801B/MAX16802B) Maximum Duty Cycle
Available in a Tiny 8-Pin µMAX Package
MAX16801A/B/MAX16802A/B
The MAX16801A/B/MAX16802A/B high-brightness (HB)
LED driver-control ICs contain all the circuitry required
for the design of wide-input-voltage-range LED drivers
for general lighting and display applications. The
MAX16801 is well suited for universal input (rectified
85VAC to 265VAC) LED drivers, while the MAX16802 is
intended for low-input-voltage (10.8VDC to 24VDC) LED
drivers.
When the LED current needs to be tightly regulated, an
additional on-board error amplifier with 1% accurate ref-
erence can be utilized. A wide dimming range can be
implemented by using low-frequency PWM dimming.
The MAX16801/MAX16802 feature an input undervoltage
lockout (UVLO) for programming the input-supply start
voltage, and to ensure proper operation during brownout
conditions. The MAX16801 has an internal-bootstrap
undervoltage lockout circuit with a large hysteresis that
simplifies offline LED driver designs. The MAX16802 does
not have this internal bootstrap circuit and can be biased
directly from a +12V rail.
The 262kHz fixed switching frequency is internally
trimmed, allowing for optimization of the magnetic and fil-
ter components, resulting in a compact, cost-effective
LED driver. The MAX16801A/MAX16802A are offered with
50% maximum duty cycle. The MAX16801B/MAX16802B
are offered with 75% maximum duty cycle. These devices
are available in an 8-pin µMAX
®
package and operate
over the -40°C to +85°C temperature range.
Ordering Information
PART
TEMP
RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
8 µMAX
8 µMAX
8 µMAX
8 µMAX
Applications
Offline and DC-DC LED
Drivers
RGB Back Light for LCD
TVs and Monitors
Commercial and
Industrial Lighting
Decorative and
Architectural Lighting
MAX16801AEUA+
MAX16801BEUA+
MAX16802AEUA+
MAX16802BEUA+
+Denotes
lead-free package.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
10.8VDC TO 24VDC
ENABLE
UVLO/EN
DIM/FB
PWM
IN
L1
V
CC
D1
C3
Typical Operating Circuit
LEDs
MAX16802B
COMP
CS
NDRV
GND
Q1
C1
GND
C2
R1
Warning:
The MAX16801/MAX16802 are designed to work with high voltages. Exercise caution.
________________________________________________________________
Maxim Integrated Products
1
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.

MAX16801B Related Products

MAX16801B MAX16801A MAX16801A_10 MAX16802AEUA+ MAX16802A MAX16802B MAX16802BEUA+ MAX16801AEUA+
Description Offline and DC-DC PWM Controllers for High-Brightness LED Drivers Offline and DC-DC PWM Controllers for High-Brightness LED Drivers Offline and DC-DC PWM Controllers for High-Brightness LED Drivers Offline and DC-DC PWM Controllers for High-Brightness LED Drivers Offline and DC-DC PWM Controllers for High-Brightness LED Drivers Offline and DC-DC PWM Controllers for High-Brightness LED Drivers Offline and DC-DC PWM Controllers for High-Brightness LED Drivers Offline and DC-DC PWM Controllers for High-Brightness LED Drivers
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