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MAX15004_10

更新时间： 2024-09-16 01:11:23
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美信 - MAXIM /
页数 文件大小 规格书
27页 570K
描述
4.5V to 40V Input Automotive Flyback/Boost/SEPIC Power-Supply Controllers

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19-0723; Rev 2; 12/10  
4.5V to 40V Input Automotive  
Flyback/Boost/SEPIC Power-Supply Controllers  
4/MAX105  
General Description  
Features  
The MAX15004A/B/MAX15005A/B high-performance,  
current-mode PWM controllers operate at an automo-  
tive input voltage range from 4.5V to 40V (load dump).  
The input voltage can go down as low as 2.5V after  
o Wide 4.5V to 40V Operating Input Voltage Range  
o Operates Down to 2.5V (with Bootstrapped VCC  
Bias)  
startup if V  
is supplied by an external bias voltage.  
CC  
o Current-Mode Control  
The controllers integrate all the building blocks neces-  
sary for implementing fixed-frequency isolated/noniso-  
lated power supplies. The general-purpose boost,  
flyback, forward, and SEPIC converters can be  
designed with ease around the MAX15004/MAX15005.  
o Low 300mV, 5% Accurate Current-Limit Threshold  
Voltage  
o Internal Error Amplifier with 1% Accurate Reference  
o RC Programmable 4% Accurate Switching  
The current-mode control architecture offers excellent  
line-transient response and cycle-by-cycle current limit  
while simplifying the frequency compensation.  
Programmable slope compensation simplifies the  
design further. A fast 60ns current-limit response time,  
low 300mV current-limit threshold makes the controllers  
suitable for high-efficiency, high-frequency DC-DC con-  
verters. The devices include an internal error amplifier  
and 1% accurate reference to facilitate the primary-side  
regulated, single-ended flyback converter or nonisolat-  
ed converters.  
Frequency  
o Switching Frequency Adjustable from 15kHz to  
500kHz (1MHz for the MAX15005A/B)  
o External Frequency Synchronization  
o 50% (MAX15004) or Adjustable (MAX15005)  
Maximum Duty Cycle  
o Programmable Slope Compensation  
o 10µA Shutdown Current  
An external resistor and capacitor network programs  
the switching frequency from 15kHz to 500kHz (1MHz for  
the MAX15005A/B). The MAX15004A/B/MAX15005A/B  
provide a SYNC input for synchronization to an external  
clock. The maximum FET-driver duty cycle for the  
MAX15004A/B is 50%. The maximum duty cycle can be  
set on the MAX15005A/B by selecting the right combi-  
nation of RT and CT.  
o Cycle-by-Cycle and Hiccup Current-Limit  
Protection  
o Overvoltage and Thermal Shutdown Protection  
o -40°C to +125°C Automotive Temperature Range  
o 16-Pin TSSOP or 16-Pin Thermally Enhanced  
TSSOP-EP Packages  
The input undervoltage lockout (ON/OFF) programs the  
input-supply startup voltage and can be used to shut-  
down the converter to reduce the total shutdown cur-  
rent down to 10µA. Protection features include  
cycle-by-cycle and hiccup current limit, output overvolt-  
age protection, and thermal shutdown.  
o AEC-Q100 Qualified  
Ordering Information  
PART  
PIN-PACKAGE MAX DUTY CYCLE  
MAX15004AAUE+  
MAX15004BAUE+  
MAX15005AAUE+  
MAX15005BAUE+  
MAX15005BAUE/V+  
16 TSSOP–EP*  
16 TSSOP  
50%  
The MAX15004A/B/MAX15005A/B are available in  
space-saving 16-pin TSSOP and thermally enhanced  
16-pin TSSOP-EP packages. All devices operate over  
the -40°C to +125°C automotive temperature range.  
50%  
16 TSSOP–EP*  
16 TSSOP  
Programmable  
Programmable  
Programmable  
16 TSSOP  
Applications  
Note: All devices are specified over the -40°C to +125°C tem-  
perature range.  
Automotive  
+Denotes lead (Pb)-free/RoHS-compliant package.  
*EP = Exposed pad.  
Vacuum Fluorescent Display (VFD) Power  
Supply  
/V = Automotive-qualified part.  
Isolated Flyback, Forward, Nonisolated SEPIC,  
Boost Converters  
Pin Configurations appear at end of data sheet.  
________________________________________________________________ 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.  
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