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LT3751EUFD-TRPBF PDF预览

LT3751EUFD-TRPBF

更新时间: 2024-10-30 05:43:35
品牌 Logo 应用领域
凌特 - Linear 控制器
页数 文件大小 规格书
28页 272K
描述
Capacitor Charger Controller with Regulation

LT3751EUFD-TRPBF 数据手册

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LT3751  
Capacitor Charger  
Controller with Regulation  
FEATURES  
DESCRIPTION  
The LT®3751 is a high input voltage capable flyback con-  
troller designed to rapidly charge a large capacitor to a  
user-adjustabletargetvoltagesetbythetransformerturns  
ratioandthreeexternalresistors. Anoptionalfeedbackpin  
can be used to provide a low noise high-voltage regulated  
output.  
n
Charges Any Size Capacitor  
n
Low Noise Output in Voltage Regulation Mode  
n
Stable Operation Under a No-Load Condition  
n
Integrated 2A MOSFET Gate Driver with Rail-to-Rail  
Operation for V ≤ 8V  
CC  
n
Selectable 5.6V or 10.5V Internal Gate Drive  
Voltage Clamp  
The LT3751 has an integrated rail-to-rail MOSFET gate  
driver that allows for efficient operation down to 4.75V.  
A low 106mV differential current sense threshold voltage  
accurately limits the peak switch current. Added protec-  
tion is achieved with user-selectable overvoltage and  
n
User-Selectable Over/Undervoltage Detect  
n
Easily Adjustable Output Voltage  
n
Primary or Secondary Side Output Voltage Sense  
n
Wide Input V Voltage Range (5V to 24V)  
CC  
n
Available in a 20-Pin QFN 4mm × 5mm  
undervoltage lockouts for both V and V  
. A typical  
CC  
TRANS  
application can charge a 1000μF capacitor to 500V in less  
than one second.  
APPLICATIONS  
The CHARGE pin is used to initiate a new charge cycle and  
providesON/OFFcontrol.TheDONEpinindicateswhenthe  
capacitor has reached its programmed value and the part  
has stopped charging. The FAULT pin indicates when the  
LT3751 has shut down due to either V or V  
exceeding the user-programmed supply tolerances.  
n
High Voltage Regulated Supply  
n
High Voltage Capacitor Charger  
n
Professional Photoflash Systems  
n
Emergency Strobe  
voltage  
n
CC  
TRANS  
Security/Inventory Control Systems  
n
Detonators  
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  
6518733 and 6636021.  
TYPICAL APPLICATION  
Regulation Mode Load Regulation  
and Efficiency vs Load Current  
DANGER HIGH VOLTAGE! OPERATION BY HIGH VOLTAGE TRAINED PERSONNEL ONLY  
T1  
1:10  
D1  
V
500V  
TRANS  
24V  
500  
498  
496  
494  
492  
490  
90  
84  
78  
72  
66  
60  
0 TO 150mA  
330μF  
10μF  
×2  
40.2k  
TRANS  
+
s2  
100μF  
RV  
CHARGE  
CLAMP  
18.2k  
0.47μF  
OFF ON  
RDCM  
40.2k  
RV  
OUT  
V
CC  
24V  
V
CC  
LT3751  
10μF  
HVGATE  
LVGATE  
CSP  
TO  
DONE  
FAULT  
V
CC  
MICRO  
374k  
475k  
374k  
475k  
UVLO1  
OVLO1  
UVLO2  
6mΩ  
V
TRANS  
CSN  
FB  
715k  
OUTPUT VOLTAGE  
EFFICIENCY  
V
CC  
OVLO2  
GND  
1.74k  
10nF  
RBG  
0
50  
100  
150  
732Ω  
LOAD CURRENT (mA)  
3751 TA01b  
3751 TA01a  
3751f  
1

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