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MAX20051

更新时间： 2023-12-20 18:45:16
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
23页 915K
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2A、同步、Buck LED驱动器，集成MOSFET

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MAX20051 数据手册

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Evaluation Kit  
Available  
Design  
Resources  
Tools  
and Models  
Support  
Click here to ask an associate for production status of specific part numbers.  
2A Synchronous-Buck LED Drivers  
with Integrated MOSFETs  
MAX20050–MAX20053  
General Description  
Benefits and Features  
● Automotive Ready: AEC-Q100 Qualified  
The MAX20050–MAX20053 are high-brightness LED (HB  
LED) drivers for automotive exterior lighting applications.  
Consisting of a fully synchronous step-down converter  
with integrated MOSFETs, the devices are capable of  
driving a series string of LEDs at up to 2A, with a mini-  
mum number of external components. The MAX20050/  
MAX20052 utilize internal loop compensation to mini-  
mize component count, while the MAX20051/MAX20053/  
MAX20053D use external compensation for full flexibility.  
● Fully Synchronous 2A Step-Down Converter with  
Integrated 0.14Ω (typ) MOSFETs  
● Wide 4.5V to 65V Input Supply Range  
● Two Switching Frequency Options: 400kHz and  
2.1MHz  
● Internal Loop Compensation (MAX20050/MAX20052)  
and External Loop Compensation  
The wide 4.5V to 65V input supply range supports  
extreme automotive cold crank and load-dump condi-  
tions. A low- and high-switching frequency option (400kHz  
or 2.1MHz) provides the designer with the flexibility to  
optimize for solution size or efficiency, while avoiding  
interference within the AM band. Spread spectrum pro-  
vides further options for the designer to reduce EMI at the  
system level. The MAX20050/MAX20051 have an internal  
switching frequency of 400kHz, while the MAX20052/  
MAX20053/MAX20053D have an internal switching fre-  
quency of 2.1MHz. In addition, the MAX20051B has  
spread spectrum disabled.  
(MAX20051/MAX20053/MAX20053D) Options  
● Switching Frequency Synchronized to PWM Dimming  
Signal  
● Active-Low Fault (FLT) Indicator  
● Output Short-Circuit Protection  
● High-Side Current Regulation Eliminates One  
Connection to LED String  
● Spread-Spectrum Mode Alleviates EMI Problems  
● Low 200mV Full-Scale High-Side Current-Sense  
Voltage  
High-side current regulation means only a single  
connection to the LED string is required; grounding of the  
string can be done locally. In addition to PWM dimming,  
the ICs provide analog dimming using the REFI pin. Full-  
scale current regulation accuracy is ±2.5%, while the  
accuracy is ±8% at 10% of full-scale over the full tempera-  
ture range of -40°C to +125°C. A 5V, 10mA LDO output is  
available for biasing other circuits.  
● REFI Pin Adjusts LED Current Down to Zero  
● PWM Dimming Disconnects Both High- and Low-  
Side MOSFET Drivers  
● 5V, 10mA LDO Output Provides Bias to Other  
Circuits  
● Ultra-Low Shutdown Current (5µA, typ)  
Fault-protection mechanisms include output overload,  
short-circuit, and device overtemperature protection. The  
devices are specified for operation over the full -40°C to  
+125°C temperature range and are available in thermally  
enhanced 12-pin (3mm x 3mm) TDFN, 14-pin (5mm x  
4.4mm) TSSOP, and 24-pin TQFN (4mm x 4mm) pack-  
ages with an exposed pad.  
● Output Overload, Short-Circuit, and Overtemperature  
Protections  
● 12-Pin (3mm x 3mm) TDFN, 14-Pin (5mm x 4.4mm)  
TSSOP, and 24-pin (4mm x 4mm) TQFN Package  
Options  
Applications  
● Daytime Running Lamps (DRLs)  
Ordering Information appears at end of data sheet.  
● Fog Lamps  
● Clearance Lamps (CLLs)  
● Corner Lamps (CLs)  
● Rear Lamps  
● Head Lamps  
● Commercial, Industrial, and Architectural Lighting  
● Driver Monitoring Systems (DMS)  
19-6926; Rev 23; 5/22  
©
2022 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners.  
One Analog Way, Wilmington, MA 01887 U.S.A.  
|
Tel: 781.329.4700  
|
© 2022 Analog Devices, Inc. All rights reserved.  
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