參數(shù)資料
型號(hào)： LT3751IFE#TR
廠商： LINEAR TECHNOLOGY CORP
元件分類： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO20
封裝： 4.40 MM, PLASTIC, TSSOP-20
文件頁數(shù)： 1/34頁
文件大?。?/td> 403K
代理商： LT3751IFE#TR
LT3751
1
3751fb
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
High Voltage Capacitor
Charger Controller with Regulation
The LT3751 is a high input voltage capable yback con-
troller designed to rapidly charge a large capacitor to a
user-adjustable high target voltage set by the transformer
turns ratio and three external resistors. Optionally, a feed-
back pin can be used to provide a low noise high voltage
regulated output.
The LT3751 has an integrated rail-to-rail MOSFET gate
driver that allows for efcient operation down to 4.75V.
A low 106mV differential current sense threshold voltage
accurately limits the peak switch current. Added pro-
tection is provided via user-selectable overvoltage and
undervoltage lockouts for both VCC and VTRANS. A typical
application can charge a 1000μF capacitor to 500V in less
than one second.
The CHARGE pin is used to initiate a new charge cycle and
provides ON/OFF control. The DONE pin indicates when the
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 VCC or VTRANS voltage
exceeding the user-programmed supply tolerances.
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 VCC ≤ 8V
n Selectable 5.6V or 10.5V Internal Gate Drive
Voltage Clamp
n User-Selectable Over/Undervoltage Detect
n Easily Adjustable Output Voltage
n Primary or Secondary Side Output Voltage Sense
n Wide Input VCC Voltage Range (5V to 24V)
n Available in 20-Pin QFN 4mm
× 5mm and 20-Lead
TSSOP Packages
n High Voltage Regulated Supply
n High Voltage Capacitor Charger
n Professional Photoash Systems
n Emergency Strobe
n Security/Inventory Control Systems
n Detonators
CHARGE
CLAMP
VCC
DONE
FAULT
UVLO1
OVLO1
UVLO2
OVLO2
RDCM
RVOUT
HVGATE
LVGATE
CSP
CSN
FB
RVTRANS
T1
1:10
D1
500V
0 TO 150mA
VTRANS
24V
VCC
10μF
×2
3751 TA01a
LT3751
DANGER HIGH VOLTAGE! OPERATION BY HIGH VOLTAGE TRAINED PERSONNEL ONLY
GND
RBG
40.2k
OFF ON
330μF
2
VCC
24V
10μF
18.2k
40.2k
6mΩ
+
100μF
715k
1.74k
10nF
732Ω
VTRANS
VCC
TO
MICRO
0.47μF
374k
475k
374k
LOAD CURRENT (mA)
0
OUTPUT
VOL
TAGE
(V)
EFFICIENCY
(%)
500
498
494
496
492
490
90
84
72
78
66
60
100
50
3751 TA01b
150
OUTPUT VOLTAGE
EFFICIENCY
Load Regulation and Efciency
L, LT, LTC, LTM, Linear Technology and the Linear logo 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.
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LT3751IUFD-TR 制造商:LINER 制造商全稱:Linear Technology 功能描述:Capacitor Charger Controller with Regulation
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