MAX16801A, MAX16801B, MAX16802A, MAX16802B 离线式、DC-DC PWM控制器，用于高亮度LED驱动器

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MAX16801A/B/MAX16802A/B高亮度(HB) LED驱动控制器IC含有设计宽输入电压范围LED驱动器所需的全部电路，适用于通用照明和显示器应用。MAX16801非常适用于通用输入(85VAC至265VAC整流电压输入) LED驱动器，MAX16802适用于低输入电压(10.8VDC至24VDC) LED驱动器。

需要精密调节LED电流时，可利用板上误差放大器以及精度为1%的基准。通过低频PWM亮度调节可实现较宽的亮度调节范围。

MAX16801/MAX16802具有输入欠压锁定(UVLO)特性，可设置输入启动电压，并可确保在电源跌落时正常工作。MAX16801具有大滞回的内部自举欠压锁定电路，从而简化了离线LED驱动器的设计。MAX16802没有这个内部自举电路，可直接由+12V电压偏置。

内部微调的262kHz固定开关频率允许优化选择磁性元件和滤波元件，从而实现紧凑、高性价比的LED驱动器。MAX16801A/MAX16802A的最大占空比为50%，MAX16801B/MAX16802B的最大占空比为75%。这些器件均采用8引脚µMAX®封装，可工作在-40°C至+85°C温度范围内。

关键特性

应用/使用

适合buck、boost、flyback、SEPIC和其它拓扑
高达50W或更高的输出功率
通用离线输入电压范围：85VAC至265VAC整流电压(MAX16801)
IN引脚直接由10.8V至24V直流输入驱动(MAX16802)
内部带有误差放大器和1%精度的基准，可实现精密的LED电流调节
PWM或线性亮度调节
262kHz ±12%固定开关频率
热关断
数字软启动
可编程输入启动电压
大滞回内部自举UVLO (MAX16801)
45µA (典型值)启动电源电流，1.4mA (典型值)工作电源电流
50% (MAX16801A/MAX16802A)或75% (MAX16801B/MAX16802B)最大占空比
采用微型8引脚µMAX封装

	商业与工业照明
	装饰灯与建筑照明
	离线式DC-DC LED驱动器
	RGB背光，用于LCD TV和监视器

Key Specifications: High Brightness LED Drivers

Part Number

Topology

V_IN (min) (V)

V_IN (max) (V)

Extended V_IN with External Bias

I_LED per Channel (max) (A)

LED String Voltage (max)

Internal Power Switch(es)

Frequency

PWM Dimming Frequency (max) (kHz)

PWM Dimming Ratio (max)

EV-Kit

RoHS Available

Industry Qualified

Package

Smallest Available Package (max w/pins) (mm²)

Operating Temp. Range (°C)

Price^**

MAX16801

Boost
Flyback
Inductor Based
SEPIC

10.8

Yes

Set externally

262kHz

1:3000

Yes

uMAX/8

-40 to +125
-40 to +85

$0.66 @ 1k

MAX16802

Boost
Buck
Flyback
Inductor Based
SEPIC

Yes

Automotive - General

$0.66 @ 1k

See All High Brightness LED Drivers (25)

Key Specifications: White LED Drivers

Part Number

Topology

Max. No. of LEDs

Configuration

Dimming Control

V_{CURR_SENSE} (mV)

P_OUT (W)

I_MAX per LED (mA)

Min. V_IN (V)

Max. V_IN (V)

I_CC (max) (mA)

Max. V_OUT (V)

Fixed Freq.

Operating Freq. (kHz)

Soft Start

Internal Power Switch(es)

Shutdown

Open LED Protection

Camera Flash

LED Temp. Derating

EV-Kit

RoHS Available

Industry Qualified

Package

Smallest Available Package (max w/pins) (mm²)

Operating Temp. Range (°C)

Price^**

MAX16801

Boost
Flyback
Inductor Based
SEPIC

100

Series-Parallel

Analog
PWM

300

1000

10.8

1.4

100

Yes

262

Yes

uMAX/8

-40 to +125
-40 to +85

$0.66 @ 1k

MAX16802

Boost
Buck
Flyback
Inductor Based
SEPIC

Series

400

Yes

Automotive - General

$0.66 @ 1k

See All White LED Drivers (42)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.