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MAX25610AATEY

更新时间： 2024-11-26 00:51:51
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24页 1054K
描述
Synchronous Buck and Buck-Boost LED Driver/DC-DC Converter

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MAX25610AATEY 数据手册

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EVALUATION KIT AVAILABLE  
Click here for production status of specific part numbers.  
MAX25610A/MAX25610B  
Synchronous Buck and Buck-Boost  
LED Driver/DC-DC Converter  
General Description  
Benefits and Features  
● Automotive Ready: AEC-Q100 Qualified  
The MAX25610A/MAX25610B are fully synchronous  
LED drivers that provide constant output current to  
drive high-power LEDs. The MAX25610A/MAX25610B  
integrate two 60mΩ power MOSFETs for synchronous  
operation, minimizing external components. Flexible  
configuration supports buck, inverting buck-boost, and  
boost conversion. The devices incorporate current-  
mode control that provides fast transient response and  
eases loop stabilization. The MAX25610A/MAX25610B  
include cycle by cycle current limiting, output overvoltage  
protection (OVP), open-string protection, output short-  
circuit protection (SCP), and thermal shutdown.  
● Integration Minimizes BOM to Save Space and Cost  
• Wide input Voltage Range from 5V to 36V in Buck-  
Boost LED Driver Applications  
• 2.2MHz Switching Frequency Option Reduces  
Inductor Size  
• Internal Current-Sense Option Reduces Cost  
• Integrated High and Low-Side Switching MOSFETs  
• PWM Dimming with an Analog Control Voltage  
Minimizes Additional Components for Dimming  
● Wide Dimming Ratio Allows High Contrast Ratio  
• Analog and PWM Dimming  
In LED driver applications, the MAX25610A/MAX25610B  
provide analog dimming of the LED current through the  
REFI pin, and PWM dimming through the PWMDIM  
pin. Switching is enabled when PWMDIM is high, and  
disabled with both MOSFETs off when PWMDIM is low.  
Analog programming of the PWMDIM pin enables the  
built-in digital dimming function, with dimming frequency  
selected by the PWMFRQ pin.  
● Multi-Topology Architecture Provides Flexibility  
• Buck LED Driver for 1-to-2 LEDs When Operating  
of Automotive Battery Applications  
• Inverting Buck-Boost LED Driver for 3-to-5 LEDs  
When Operating from Automotive Battery  
Applications  
● Protection Features and Wide Temperature Range  
Increase System Reliability  
The MAX25610A/MAX25610B include two 5V regulators.  
• -40°C to +125°C Operating Temperature Range  
• Short-Circuit, Overvoltage, and Thermal Protection  
• FLT Flag for Fault Indication  
A regulated 5V between V  
and AGND is used for IC  
CC  
bias, REFI and PWMFRQ programming. Another low  
current regulated 5V between V and INN is used for  
EE  
analog PWMDIM and FLT pullup. Both PWMDIM and  
FLT reference INN for easy system interface. Switching  
frequency is internally set at 400kHz for the MAX25610A  
and 2.2MHz for the MAX25610B. The devices have built-  
in spread spectrum to reduce EMI noise. External and  
internal current sense are supported, with ±3% and ±6%  
respective LED current accuracy.  
Ordering Information appears at end of data sheet.  
Simplified Application Circuit  
V
IN+  
C
BST  
INP  
INN  
BST  
L
BATTERY GND  
C
V
IN  
V
IN-  
C
LX  
LX  
IN2  
IN-  
The MAX25610A/MAX25610B are well-suited for  
automotive applications requiring high voltage input and  
can withstand load dump events up to 40V. The devices  
can also be used as a DC-DC converter using the  
FB input as feedback for the output voltage divider.  
The MAX25610A/MAX25610B are available in thermally  
enhanced 16-pin TSSOP-EP and 16-pin TQFN packages.  
They are specified to operate over the -40ºC to +125ºC  
automotive temperature range.  
IC-GND  
R
OUT1  
OUT  
C
VEE  
LED1  
LEDn  
V
EE  
PWMDIM  
MAX25610A  
PWM or  
ANALOG  
DIMMING  
C
OUT  
R
OUT2  
OPEN-DRAIN  
FAULT  
FLT  
C
PWMFRQ  
PGND  
PWMFRQ  
V
CC  
100kΩ  
R
PWMFRQ  
FB  
V
CC  
COMP  
C
COMP  
COMP  
C
REFI  
VCC  
IC-GND  
DOMAIN  
R
REFI  
Applications  
● Automotive Lighting Applications  
AGND  
R
● Industrial Lighting Applications  
19-100449; Rev 5; 4/19  
1234567...24

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