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reference designLT8316

Analog Devices LT8316

600VIN Micropower No-Opto Isolated Flyback Controller

Overview

TopologyFlyback Converter
Input voltage100-600 V
Switching frequency3.5-142 kHz
Output 112 V / 4 A

Description

The LT®8316 is a micropower, high voltage flyback con-troller. No opto-isolator is needed for regulation. The device samples the output voltage from the isolated fly-back waveform appearing across a third winding on the transformer. Quasi-resonant boundary mode operation improves load regulation, reduces transformer size, and maintains high efficiency.At start-up, the LT8316 charges its INTVCC capacitor viaa high voltage current source. During normal operation,the current source turns off and the device draws itspower from a third winding on the transformer minimizingstandby power dissipation.The LT8316 operates from a wide range of input supplyvoltages and can deliver up to 100W of power. It is availablein a thermally enhanced 20-pin TSSOP package withfour pins removed for high-voltage spacing.

Features

  • Wide Input Voltage Range: 16V to 600V
  • No Opto-Isolator Required for Regulation
  • Quasi-Resonant Boundary Mode Operation
  • Constant-Current and Constant-Voltage Regulation
  • Low-Ripple Light Load Burst Mode® Operation
  • Low Quiescent Current: 75μA
  • Programmable Current Limit and Soft-Start
  • TSSOP Package with High-Voltage Spacing

Typical applications

  • Electric Vehicles and Battery Stacks
  • Isolated Telecom, Automotive, Industrial, Medical Power Supplies / Isolated Off-Line Housekeeping Power Supplies / Multioutput Isolated Power Supplies for Inverter Gate Drives

More information

Products

Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
VIN
VOut1(V)
IOut1(A)
Vaux(V)
RDC 1(Ω)
RDC 2(Ω)
RDC 3(Ω)
fswitch(kHz)
L(µH)
NPRI : NSEC : NAUX
ISAT(A)
VT(V (AC))
L(mm)
W(mm)
H(mm)
Mount
Size
Samples
750317463
WE-OLLT Offline Flyback Transformers, 57 - 424 V (AC), 12 V
Simu­lation
Downloads9 files

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CAD files ZIP

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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-OLLT Offline Flyback Transformers
Input Voltage 57 - 424 V (AC)
Output Voltage 112 V
Output Current 14 A
Auxiliary Voltage12 V
DC Resistance 10.615 Ω
DC Resistance 20.025 Ω
DC Resistance 30.2 Ω
Switching Frequency 100
Inductance440 µH
Turns Ratio8:1:1 
Saturation Current5.5 A
Insulation Test Voltage3000 V (AC)
Length31.5 mm
Width31.5 mm
Height20.5 mm
MountTHT 
SizeRM10