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LTC3806

Features: · High Efficiency at Full Load· Better Cross Regulation Than Nonsynchronous Converters (Multiple Outputs)·Soft-Start Minimizes Inrush Current· Current Mode Control Provides Excellent Transient Response· High Maximum Duty Cycle: 89% Typical· ±2% Programmable Undervoltage Lockout Threshold...

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SeekIC No. : 004402358 Detail

LTC3806: Features: · High Efficiency at Full Load· Better Cross Regulation Than Nonsynchronous Converters (Multiple Outputs)·Soft-Start Minimizes Inrush Current· Current Mode Control Provides Excellent Trans...

LTC3806 Data Sheet

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Part Number:
LTC3806
Supply Ability:
5000

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

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Product Details

Description



Features:

· High Efficiency at Full Load
· Better Cross Regulation Than Nonsynchronous Converters (Multiple Outputs)
·Soft-Start Minimizes Inrush Current
· Current Mode Control Provides Excellent Transient Response
· High Maximum Duty Cycle: 89% Typical
· ±2% Programmable Undervoltage Lockout Threshold
·±1% Internal Voltage Reference
·Micropower Start-Up
·Constant Frequency Operation (Never Audible)
·3mm ×4mm 12-Pin DFN Package


Application

· 48V Telecom Supplies
· 12V/42V Automotive
· 24V Industrial
· VoIP Phone
· Power Over Ethernet


Pinout

Connection Diagram


Specifications

VIN Voltage .................................................................. 25V
INTVCC Voltage .............................................................. 8V
INTVCC Output Current ............................................. 50mA
G1, G2 Voltages ........................ 0.3V to VINTVCC + 0.3V
ITH, FB, SS Voltages .....................................0.3V to 2.7V
RUN Voltage .................................................. 0.3V to 7V
SENSE Pin Voltage ........................................ 0.3V to 8V
Operating Ambient Temperature Range
(Note 2) ..................................................... 40 to 85
Junction Temperature (Note 3) ................................ 125
Storage Temperature Range ..................... 65to 125


Description

The LTC®3806 is a current mode synchronous flyback controller that drives N-channel power MOSFETs and requires very few external components. It is intended for medium power applications where multiple outputs are required. Synchronous rectification provides higher efficiency and improved output cross regulation than nonsynchronous converters.

The LTC3806 IC contains all the necessary control circuitry including a 250kHz oscillator, precision undervoltage lockout circuit with hysteresis, gate drivers for primary and synchronous switches, current mode control circuitry and soft-start circuitry.

Programmable soft-start reduces inrush currents. This makes it easier to design compliant Power Over Ethernet supplies.

Low start-up current reduces power dissipation in the start-up resistor and reduces the size of the external startup capacitor.

The LTC3806 is available in a 12-pin, exposed pad DFN package.




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