Datasheet > MAX16840

MAX16840

更新时间： 2024-11-12 14:58:11

品牌	Logo	应用领域
亚德诺 - ADI		驱动驱动器
页数	文件大小	规格书
12页	538K
描述
MR16及其它12V交流输入LED灯驱动器，内置MOSFET

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中文翻译

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MAX16840 数据手册

EVALUATION KIT AVAILABLE

MAX16840

LED Driver with Integrated MOSFET

for MR16 and Other 12V AC Input Lamps

General Description

Beneﬁts and Features

● Cost-Effective Solution for MR16 and Other SSL

The MAX16840 is an LED driver IC for lighting applica-

tions. It includes all the necessary features to design low-

component-count LED drivers for 12V AC and 24V AC

input (e.g., MR16) light bulbs. A proprietary input-current

control scheme allows LED lamps based on this device

to be compatible with electronic transformers, and dim-

mable with standard trailing-edge dimmers (where elec-

tronic transformers are present).

Applications

• Proprietary Input Current-Control Scheme to

Achieve Electronic Transformer Compatibility

and Dimmability

• Buck, Boost, SEPIC, and Buck-Boost

Topologies

• Analog Dimming

The IC can be used in buck, boost, and buck-boost

topologies and features. It has an integrated 0.2I (max),

48V switching MOSFET.

● Minimal Component Count Saves Cost and Space

•ꢀ Integratedꢀ0.2Ωꢀ(max)ꢀ48VꢀSwitchingꢀMOSFET

●

ProtectionꢀFeaturesꢀandꢀWideꢀOperatingꢀTemperatureꢀ

Range Improves Reliability

The IC uses constant-frequency average current-mode

control. It senses the input current through the voltage

at the FB pin, and regulates its average. An input pin

(REFI) allows the setting of the input-current level. When

the voltage at this pin is set below a certain threshold, the

input current is proportional to this voltage, while when

that voltage is beyond the threshold, the input current is

set at a fixed, predefined level. This nonlinear behavior of

REFI allows its use to achieve thermal foldback, by con-

necting it to an NTC resistor.

•ꢀ Thermal-FoldbackꢀProtection

• Output Overvoltage Protection

• Internal Overtemperature Protection

•ꢀ Availableꢀinꢀaꢀ10-PinꢀThermallyꢀEnhancedꢀTDFN

Package

•ꢀ OperationꢀOverꢀ-40°Cꢀtoꢀ+125°CꢀTemperatureꢀꢀ

Range

Ordering Information

PART

TEMP RANGE

PIN-PACKAGE

The IC also features an internal overvoltage protection on

the IN pin to protect the internal switching MOSFET from

damage if the LED string is open or if the voltage on the

LED string is too high.

MAX16840ATB+

-40NC to +125NC

10 TDFN-EP*

+Denotes a lead(Pb)-free/RoHS-compliant package.

*EP = Exposed pad.

The IC has a separate EXT pin that can be used to guar-

antee that there is a kick-start of current at turn-on for low-

input voltages for proper operation with electronic trans-

formers. EXT drives an external npn transistor. Once the

UVLO threshold of 5.5V is crossed on IN, EXT is pulled

to ground and the external npn transistor is turned off.

Typical Operating Circuit

LED-

LED+

The IC is available in a 3mm x 3mm, 10-pin TDFN power

package, and is rated over the -40NC to +125NC operat-

ing temperature range.

DRAIN

12V AC

BD1

REFI

MAX16840

EXT

Applications

COMP

SOURCE

MR16 and Other 12V AC or DC Input LED

Lighting Applications

GND

19-5671; Rev 4; 1/15

12 3 4 5 6 7...12

中文翻译

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与MAX16840相关器件

型号	品牌	获取价格	描述	数据表
MAX16840_1108	MAXIM	获取价格	LED Driver with Integrated MOSFET for MR16 and Other 12V AC Input Lamps
MAX16840ATB	MAXIM	获取价格	LED Driver with Integrated MOSFET for MR16 and Other 12V AC Input Lamps
MAX16840ATB+	MAXIM	获取价格	LED Driver with Integrated MOSFET for MR16 and Other 12V AC Input Lamps
MAX16840ATB+T	MAXIM	获取价格	LED Driver,
MAX16840ATE+	MAXIM	获取价格	LED Driver
MAX16841	MAXIM	获取价格	Controller IC for Dimmable Offline LED Lamps
MAX16841_13	MAXIM	获取价格	Controller IC for Dimmable Offline LED Lamps
MAX16841ASA+	MAXIM	获取价格	LED Driver, 1-Segment, BICMOS, PDSO8, ROHS COMPLIANT, SOP-8
MAX1684EEE	MAXIM	获取价格	Low-Noise, 14V Input, 1A, PWM Step-Down Converters
MAX1684EEE+	MAXIM	获取价格	Switching Regulator, Current-mode, 2.3A, 340kHz Switching Freq-Max, BICMOS, PDSO16, 0.150

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