Data Sheet

ADP1074

Rev. D | Page 3 of 32

GENERAL DESCRIPTION

The ADP1074 is a current mode, fixed frequency, active clamp,

synchronous forward controller designed for isolated dc to dc

power supplies. Analog Devices proprietary iCouplers® are

integrated in the ADP1074 to eliminate the bulky signal trans-

formers and optocouplers that transmit signals over the isolation

boundary. Integrating the iCouplers reduces system design

complexity, cost, and component count and improves overall

system reliability. With the integrated isolators and metal-oxide

semiconductor field effect transistor (MOSFET) drivers on both

the primary and the secondary side, the ADP1074 offers a compact

system level design and yields a higher efficiency than a non-

synchronous forward converter at heavy loads.

The primary side pins provide functions for programming the

switching frequency, maximum duty cycle, external frequency

synchronization, and slope compensation.

The secondary side pins provide functions for differential output

voltage sensing, overvoltage, power good, tracking, and

programmable light load mode setting.

The feedback signal and timing of synchronous rectifier pulse-

width modulations (PWMs) are transmitted from primary to

secondary or from secondary to primary sides through the

i

Couplers using a proprietary transmission scheme.

The ADP1074 also offers features such as input current

protection, undervoltage lockout (UVLO), precision enable

with adjustable hysteresis, overtemperature protection (OTP),

and power saving light load mode (LLM).

Lead Free Finish

Part

Marking

Package Description

Temperature

LT8672EMS#WPBF

LT8672EMS#WTRPBF

LTGYT

10-lead plastic MSOP

−40°C to +125°C

LT8672IMS#WPBF

LT8672IMS#WTRPBF

LTGYT

10-lead plastic MSOP

−40°C to +125°C

LT8672JMS#WPBF

LT8672JMS#WTRPBF

LTGYT

10-lead plastic MSOP

−40°C to +150°C

LT8672HMS#WPBF

LT8672HMS#WTRPBF

LTGYT

10-lead plastic MSOP

−40°C to +150°C

LT8672EDDBM#WTRMPBF

LT8672EDDBM#WTRPBF

LHJR

10-lead, 3 mm × 2 mm, plastic side wettable

DFN package

−40°C to +125°C

LT8672IDDBM#WTRMPBF

LT8672IDDBM#WTRPBF

LHJR

10-lead, 3 mm × 2 mm, plastic side wettable

DFN package

−40°C to +125°C

LT8672JDDBM#WTRMPBF

LT8672JDDBM#WTRPBF

LHJR

10-lead, 3 mm × 2 mm, plastic side wettable

DFN package

−40°C to +150°C

designated with a W suffix. Only the automotive grade products shown are available for use in automotive applications. Contact a local Analog Devices account

representative for specific product ordering information and to obtain the specific automotive reliability reports for these models.