MAX16801A 데이터 시트보기 (PDF) - Maxim Integrated

부품명

상세내역

일치하는 목록

MAX16801A

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

Maxim Integrated 

19-3880; Rev 2; 1/10

EVAALVUAAILTAIOBNLEKIT

Offline and DC-DC PWM Controllers for

High-Brightness LED Drivers

General Description

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.

Offline and DC-DC LED

Drivers

RGB Back Light for LCD

TVs and Monitors

Applications

Commercial and

Industrial Lighting

Decorative and

Architectural Lighting

µMAX is a registered trademark of Maxim Integrated Products, Inc.

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

Ordering Information

PART

TEMP

RANGE

MAX16801AEUA+

-40°C to +85°C

MAX16801BEUA+

-40°C to +85°C

MAX16802AEUA+

-40°C to +85°C

MAX16802BEUA+

-40°C to +85°C

+Denotes lead-free package.

PIN-

PACKAGE

8 µMAX

8 µMAX

8 µMAX

8 µMAX

Typical Operating Circuit

10.8VDC TO 24VDC

ENABLE

PWM

UVLO/EN

IN

DIM/FB

VCC

MAX16802B

COMP

CS

NDRV

GND

L1

C3

LEDs

D1

Q1

C1

C2

R1

GND

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.

Share Link: