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LT3751

Features: ` Charges Any Size Capacitor` Low Noise Output in Voltage Regulation Mode` Stable Operation Under a No-Load Condition` Integrated 2A MOSFET Gate Driver with Rail-to-Rail Operation for VCC 8V` Selectable 5.6V or 10.5V Internal Gate Drive Voltage Clamp` User-Selectable Over/Undervoltage D...

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SeekIC No. : 004401149 Detail

LT3751: Features: ` Charges Any Size Capacitor` Low Noise Output in Voltage Regulation Mode` Stable Operation Under a No-Load Condition` Integrated 2A MOSFET Gate Driver with Rail-to-Rail Operation for VCC ...

LT3751 Data Sheet

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Part Number:
LT3751
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

` Charges Any Size Capacitor
` Low Noise Output in Voltage Regulation Mode
` Stable Operation Under a No-Load Condition
` Integrated 2A MOSFET Gate Driver with Rail-to-Rail Operation for VCC 8V
` Selectable 5.6V or 10.5V Internal Gate Drive Voltage Clamp
` User-Selectable Over/Undervoltage Detect
` Easily Adjustable Output Voltage
` Primary or Secondary Side Output Voltage Sense
` Wide Input VCC Voltage Range (5V to 24V)
` Available in a 20-Pin QFN 4mm * 5mm


Application

·High Voltage Regulated Supply
· High Voltage Capacitor Charger
· Professional Photofl ash Systems
· Emergency Strobe
· Security/Inventory Control Systems
· Detonators


Pinout

Connection Diagram


Specifications

VCC, CHARGE, CLAMP .............................................24V
DONE, FAULT ..........................................................24V
LVGATE (Note 8) .....................................................24V
VCC LVGATE...........................................................8V
HVGATE ..............................................................Note 9
RBG, CSP, CSN ..........................................................2V
FB .............................................................................5V
Current into DONE Pin ........................................±1mA
Current into FAULT Pin ........................................±1mA
Current into RVTRANS Pin .....................................±1mA
Current into RVOUT Pin ......................................±10mA
Current into RDCM Pin .......................................±10mA
Current into UVLO1 Pin ........................................±1mA
Current into UVLO2 Pin ........................................±1mA
Current into OVLO1 Pin ........................................±1mA
Current into OVLO2 Pin ........................................±1mA
Maximum Junction Temperature............................. 125
Operating Temperature Range (Note 2).. 40 to 125
Storage Temperature Range ...................65 to 125


Description

The LT®3751 is a high input voltage capable flyback controller  designed to rapidly charge a large capacitor to a user-adjustable target voltage set by the transformer turns ratio and three external resistors. An optional feedback 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 effi cient operation down to 4.75V. A low 106mV differential current sense threshold voltage accurately limits the peak switch current. Added protection is achieved with user-selectable overvoltage and undervoltage lockouts for both VCC and VTRANS. A typical application can charge a 1000F 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.




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