Details, datasheet, quote on part number: LT8302IS8EPBF
PartLT8302IS8EPBF
Category
TitleIC REG FLYBCK INV ISO 3.6A 8SOIC
Description

LTC’s LT8302 is a monolithic micropower isolated flyback converter that operates from an input voltage range of 2.8 V to 42 V and delivers up to 18 W of isolated output power. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires no third winding or opto-isolator for regulation. The output voltage is programmed with two external resistors and a third optional temperature compensation resistor. Boundary mode operation provides a small magnetic solution with excellent load regulation. Low ripple Burst Mode operation maintains high efficiency at light load while minimizing the output voltage ripple. The high level of integration and the use of boundary and low ripple burst modes result in a simple to use, low component count, and high efficiency application solution for isolated power delivery. The converter comes in an 8-SOIC-EP packages with temperature range up to -55°C to +150°C. The LT8302 is perfect for isolated power supplies found in automotive, industrial, and medical applications.



CompanyLinear Technology Corporation
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Others parts numbering
LT8302HS8EPBF
LT8302MPS8EPBF
LT8302ES8EPBF
DC2014A: BOARD EVAL FOR LT8302ES8E

 

Features, Applications
LT8302 42VIN Micropower No-Opto Isolated Flyback Converter with 65V/3.6A Switch Features

to 42V Input Voltage Range n3.6A, 65V Internal DMOS Power Switch n Low Quiescent Current: 106A in Sleep Mode 380A in Active Mode n Quasi-Resonant Boundary Mode Operation at Heavy Load n Low Ripple Burst Mode Operation at Light Load n Minimum Load < 0.5% (Typ) of Full Output n No Transformer Third Winding or Opto-Isolator Required for Output Voltage Regulation n Accurate EN/UVLO Threshold and Hysteresis n Internal Compensation and Soft-Start n Temperature Compensation for Output Diode n Output Short-Circuit Protection n Thermally Enhanced 8-Lead SO Package

Description

The is a monolithic micropower isolated flyback converter. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires no third winding or opto-isolator for regulation. The output voltage is programmed with two external resistors and a third optional temperature compensation resistor. Boundary mode operation provides a small magnetic solution with excellent load regulation. Low ripple Burst Mode operation maintains high efficiency at light load while minimizing the output voltage ripple. 3.6A, 65V DMOS power switch is integrated along with all the high voltage circuitry and control logic into a thermally enhanced 8-lead SO package. The LT8302 operates from an input voltage range to 42V and delivers 18W of isolated output power. The high level of integration and the use of boundary and low ripple burst modes result in a simple to use, low component count, and high efficiency application solution for isolated power delivery.

L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 7463497, 7471522.

Applications

Isolated Automotive, Industrial, Medical Power Supplies n Isolated Auxiliary/Housekeeping Power Supplies

SW (Note 2)...............................................................65V VIN.............................................................................42V EN/UVLO.....................................................................VIN RFB.........................................................VIN 0.5V to VIN Current Into RFB.....................................................200A INTVCC, RREF, TC..........................................................4V Operating Junction Temperature Range (Notes to 150C Storage Temperature Range................... to 150C Lead Temperature (Soldering, 10 sec).................... 300C

S8E PACKAGE 8-LEAD PLASTIC = 33C/W EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB

PART MARKING* PACKAGE DESCRIPTION 8-Lead Plastic SO 8-Lead Plastic SO 8-Lead Plastic SO 8-Lead Plastic SO TEMPERATURE RANGE to 150C

Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/. Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.

The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are = 25C. VIN = 5V, VEN/UVLO = VIN, CINTVCC 1F to GND, unless otherwise noted.

SYMBOL VIN IQ PARAMETER VIN Voltage Range VIN Quiescent Current VEN/UVLO = 0.2V VEN/UVLO = 1.1V Sleep Mode (Switch Off) Active Mode (Switch On) For Lowest Off IQ Falling VEN/UVLO = 0.3V VEN/UVLO = 1.1V VEN/UVLO = 1.3V IINTVCC to 10mA VINTVCC = 2.8V Falling IRFB to 125A

EN/UVLO Shutdown Threshold EN/UVLO Enable Threshold EN/UVLO Enable Hysteresis IHYS VINTVCC IINTVCC EN/UVLO Hysteresis Current

INTVCC Regulation Voltage INTVCC Current Limit INTVCC UVLO Threshold INTVCC UVLO Hysteresis (RFB VIN) Voltage RREF Regulation Voltage RREF Regulation Voltage Line Regulation

VTC ITC fMIN tON(MIN) tOFF(MAX) ISW(MAX) ISW(MIN) RDS(ON) ILKG tSS

TC Pin Voltage TC Pin Current Minimum Switching Frequency Minimum Switch-On Time Maximum Switch-Off Time Maximum Switch Current Limit Minimum Switch Current Limit Switch On-Resistance Switch Leakage Current Soft-Start Timer ISW = 1.5A VSW = 65V Backup Timer 3.6 0.70

Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The SW pin is rated to 65V for transients. Depending on the leakage inductance voltage spike, operating waveforms of the SW pin should be derated to keep the flyback voltage spike below 65V as shown in Figure 5. Note 3: The LT8302E is guaranteed to meet performance specifications from to 125C junction temperature. Specifications over the to 125C operating junction temperature range are assured by design, characterization and correlation with statistical process controls. The

LT8302I is guaranteed over the full to 125C operating junction temperature range. The LT8302H is guaranteed over the full to 150C operating junction temperature range. The LT8302MP is guaranteed over the full to 150C operating junction temperature range. High junction temperatures degrade operating lifetimes. Operating lifetime is derated at junction temperature greater than 125C. Note 4: The LT8302 includes overtemperature protection that is intended to protect the device during momentary overload conditions. Junction temperature will exceed 150C when overtemperature protection is active. Continuous operation above the specified maximum operating junction temperature may impair device reliability.


 

Some Part number from the same manufacture Linear Technology Corporation
LT8302HS8EPBF

LTC’s LT8302 is a monolithic micropower isolated flyback converter that operates from an input voltage range of 2.8 V to 42 V and delivers up to 18 W of isolated output power. By sampling the isolated

LT8302MPS8EPBF
LT8302ES8EPBF
DC2014A
 
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