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LTC3862EFE-1-TRPBF

更新时间： 2024-09-09 05:43:55
品牌 Logo 应用领域
凌特 - Linear 多相元件控制器
页数 文件大小 规格书
40页 739K
描述
Multi-Phase Current Mode Step-Up DC/DC Controller

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LTC3862EFE-1-TRPBF 数据手册

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LTC3862-1  
Multi-Phase Current Mode  
Step-Up DC/DC Controller  
DESCRIPTION  
FEATURES  
TheLTC®3862-1isatwophaseconstantfrequency,current  
mode boost and SEPIC controller that drives N-channel  
power MOSFETs. Two phase operation reduces system  
filteringcapacitanceandinductancerequirements.The10V  
gate drive is optimized for most automotive and industrial  
grade power MOSFETs.  
n
Wide V Range: 8.5V to 36V Operation  
IN  
n
2-Phase Operation Reduces Input and Output  
Capacitance  
n
Fixed Frequency, Peak Current Mode Control  
n
10V Gate Drive for High Voltage MOSFETs  
n
Adjustable Slope Compensation Gain  
n
Adjustable Max Duty Cycle (Up to 96%)  
Adjustableslopecompensationgainallowstheusertofine-  
tune the current loop gain, improving noise immunity.  
n
Adjustable Leading Edge Blanking  
n
1ꢀ Internal Voltage Reference  
n
Theoperatingfrequencycanbesetwithanexternalresistor  
over a 75kHz to 500kHz range and can be synchronized  
to an external clock using the internal PLL. Multi-phase  
operation is possible using the SYNC input, the CLKOUT  
output and the PHASEMODE control pin allowing 2-, 3-,  
4-, 6- or 12-phase operation.  
Programmable Operating Frequency with One  
External Resistor (75kHz to 500kHz)  
n
n
Phase-Lockable Fixed Frequency 50kHz to 650kHz  
SYNC Input and CLKOUT for 2-, 3-, 4-, 6- or  
12-Phase Operation (PHASEMODE Programmable)  
Internal 10V LDO Regulator  
24-Lead Narrow SSOP Package  
5mm × 5mm QFN Package with 0.65mm Lead Pitch  
24-Lead Thermally Enhanced TSSOP Package  
n
n
n
n
Other features include an internal 10V LDO with  
undervoltage lockout protection for the gate drivers, a  
precision RUN pin threshold with programmable hyster-  
esis, soft-start and programmable leading edge blanking  
and maximum duty cycle. The LTC3862 is a 5V gate drive  
version of the LTC3862-1.  
APPLICATIONS  
n
Automotive, Telecom and Industrial Power Supplies  
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners. Protected by U.S. Patents,  
including 6144194, 6498466, 6611131.  
TYPICAL APPLICATION  
V
IN  
8.5V TO 36V  
22μF  
50V  
150k  
Efficiency vs Output Current  
56μH  
56μH  
V
OUT  
100  
98  
96  
94  
92  
90  
88  
86  
84  
82  
80  
72V  
V
= 72V  
OUT  
V
24.9k  
IN  
2A (MAX)  
RUN  
INTV  
GATE1  
+
V
= 32V  
IN  
SENSE1  
CC  
110μF  
100V  
4.7μF  
V
= 24V  
0.020Ω  
LTC3862-1  
IN  
–
BLANK  
FREQ  
SYNC  
SENSE1  
45.3k  
GATE2  
+
SENSE2  
V
= 9V  
IN  
PLLFLTR  
0.1μF  
0.020Ω  
SS  
–
SENSE2  
1nF  
3V8  
PGND  
CLKOUT  
SLOPE  
FB  
100  
1000  
10000  
1.5nF  
45.3k  
D
MAX  
LOAD CURRENT (mA)  
38621 TA01b  
ITH  
PHASEMODE  
SGND  
324k  
5.62k  
100pF  
38621 TA01a  
38621f  
1
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