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LTC3813IG-TRPBF

更新时间： 2024-09-24 05:43:55
品牌 Logo 应用领域
凌特 - Linear 控制器
页数 文件大小 规格书
32页 449K
描述
100V Current Mode Synchronous Step-Up Controller

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中文翻译

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LTC3813IG-TRPBF 数据手册

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LTC3813  
100V Current Mode  
Synchronous Step-Up Controller  
FEATURES  
DESCRIPTION  
n
High Output Voltages: Up to 100V  
TheLTC3813isasynchronousstep-upswitchingregulator  
controller that can generate output voltages up to 100V.  
TheLTC3813usesaconstantoff-timepeakcurrentcontrol  
architecture with accurate cycle-by-cycle current limit,  
without requiring a sense resistor.  
n
Large 1Ω Gate Drivers  
n
No Current Sense Resistor Required  
n
Dual N-Channel MOSFET Synchronous Drive  
0.ꢀ5 0.8V Voltage Reference  
n
n
Fast Transient Response  
Programmable Soft-Start  
A precise internal reference provides 0.ꢀ5 ꢁC accuracy.  
A high bandwidth (2ꢀMHz) error amplifier provides very  
fastlineandloadtransientresponse.Large1Ωgatedrivers  
allow the LTC3813 to drive multiple MOSFETs for higher  
current applications. The operating frequency is selected  
n
n
Generates 10V ꢁriver Supply from Input Supply  
n
Synchronizable to External Clock  
n
Power Good Output Voltage Monitor  
n
Adjustable Off-Time/Frequency: t  
< 100ns  
OFF(MIN)  
by an external resistor and is compensated for variations  
n
n
n
n
Adjustable Cycle-by-Cycle Current Limit  
Programmable Undervoltage Lockout  
Output Overvoltage Protection  
28-Pin SSOP Package  
in V and can also be synchronized to an external clock  
IN  
forswitching-noisesensitiveapplications.Ashutdownpin  
allows the LTC3813 to be turned off, reducing the supply  
current to 240μA.  
PARAMETER  
Maximum V  
LTC3813  
100V  
LTC3814-5  
60V  
APPLICATIONS  
OUT  
n
24V Fan Supplies  
MOSFET Gate ꢁrive  
6.3ꢀV to 14V  
6.2V  
4.ꢀV to 14V  
4.2V  
n
+
48V Telecom and Base Station Power Supplies  
Networking Equipment, Servers  
INTV UV  
CC  
n
–
INTV UV  
6V  
4V  
CC  
n
Automotive and Industrial Control Systems  
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 ꢀ481178, ꢀ847ꢀꢀ4, 6304066, 6476ꢀ89, 6ꢀ802ꢀ8, 6677210, 6774611.  
TYPICAL APPLICATION  
Efficiency vs Load Current  
High Efficiency High Voltage Step-Up Converter  
ꢀ0k  
100  
V
= 36V  
= 24V  
IN  
IN  
ꢀ00k  
V
V
OUT  
NꢁRV  
BOOST  
TG  
I
IN  
OFF  
10V TO 40V  
V
+
9ꢀ  
90  
8ꢀ  
80  
PGOOꢁ  
10μH  
22μF  
V
IN  
= 12V  
LTC3813  
V
RNG  
M1  
0.1μF  
Si78ꢀ0ꢁP  
V
SYNC  
SS  
OUT  
SW  
1000pF  
ꢀ0V/ꢀA  
EXTV  
CC  
CC  
ꢁRV  
INTV  
SHDN  
ꢁ1  
MBR1100  
CC  
+
30.9k  
499Ω  
+
SENSE  
I
TH  
270μF  
2x  
M2  
Si78ꢀ0ꢁP  
2x  
0.01μF  
100pF  
100k  
BG  
V
0
1
2
3
4
ꢀ
FB  
–
SENSE  
BGRTN  
LOAꢁ (A)  
3813 TA01b  
SGNꢁ  
1μF  
3813 TA01  
3813fb  
1
1234567...32

中文翻译

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