DC/DC Capacitor Charger Controller, Flyback, High Voltage, 4.75 V to 24 V, 1 Output, QFN-20

LT3751IUFD#PBF - DC/DC Capacitor Charger Controller, Flyback, High Voltage, 4.75 V to 24 V, 1 Output, QFN-20

Image is for illustrative purposes only. Please refer to product description.

Manufacturer Part No:
Order Code:
Technical Datasheet:
See all Technical Docs

Product Overview

The LT3751IUFD#PBF is a high input voltage capable Flyback Controller designed to rapidly charge a large capacitor to user-adjustable high target voltage set by the transformer turns ratio and three external resistors. Optionally, a 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 efficient operation down to 4.75V. A low 106mV differential current sense threshold voltage accurately limits the peak switch current. Added protection 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.
  • Charges any size capacitor
  • Low noise output in voltage regulation mode
  • Stable operation under a no-load condition
  • User-selectable over/undervoltage detect
  • Easily adjustable output voltage
  • Primary or secondary side output voltage sense


Lighting, Security, Power Management

Product Information

1 Output
Cut Tape
MSL 1 - Unlimited
Find similar products Choose and modify the attributes above to find similar products.

Associated Products

Compare Selected

Related Searches


96 In stock

96 in stock for next day delivery (UK stock)

see cut-off times
Check stock and lead times
More stock available week commencing 11/03/19
£6.96 £ 6.96
Price for:
Multiple: 1 Minimum: 1
Quantity Price
1 + £6.96
10 + £6.40
25 + £4.56
50 + £4.38
100 + £4.21
250 + £4.03
500 + £3.85
No longer stocked:: No Longer Manufactured::
Add to Basket
Add Line Note
Total Price:
Total Price: ( )
Total Price: --

Customer Reviews


Like to see information about this product from other customers?

 Read discussions, blogs, documents from our community members.


Select document type(s) you want to see and click “Apply Filters” button
Post a question to one of our experts or start a discussion and get responses from supplier experts and fellow engineers in our community.