LT8316

PRODUCTION

560VIN Micropower No-Opto Isolated Flyback Controller

Analog Devices LT8316 Product Info

10 February 2026 5

Features

Wide Input Voltage Range: 16V to 560V (600V max)
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 Pin Spacing
Available in 20(15)-Lead Package with Extended Creepage Distance
AEC-Q100 Compliant with Exception
- HBM ESD Classification Level 1C

Part details & applications

The LT8316 is a micropower, high voltage flyback controller. No opto-isolator is needed for regulation. The device samples the output voltage from the isolated flyback 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 INTV_CC capacitor via a high voltage current source. During normal operation, the current source turns off and the device draws its power from a third winding on the transformer minimizing standby power dissipation.

The LT8316 operates from a wide range of input supply voltages and can deliver up to 100W of power. It is available in a thermally enhanced 20-pin TSSOP package with four pins removed for high-voltage spacing.

APPLICATIONS

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

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