ETA8047

www.etasolution.com

1

Powering Minds of the Smart

Green-ModeQuasi-Resonant PWMControllerforFly-BackConverters

DESCRIPTION

FEATURES

ETA8047 is a high performance peak current mode PWM controller.

ETA8047 employs Quasi-Resonant and frequency foldback technique to

reduce EMI and improve average efficiency and meets the latest Level

VI efficiency standard with enough margin.

Its burst mode operation enables low standby power with small output

voltage ripple. And it achieves very low standby power, good dynamic

response and accurate voltage regulation with an opto-coupler and the

secondary side control circuit.

With build-in fast start process, ETA8047 can get output voltage very

short rise time even with a big capacitive load. And a soft start circuit

keeps output voltage no overshoot at power up.

In full load conditions, ETA8047 can work in both CCM mode and DCM

mode to meet different types of applications. Quasi-Resonant (QR)

function works all the time in DCM modes.

ETA8047 can be directly used for Quick-Charger Class A solution

because of its 7-37V wide VCC operation voltage range.

ETA8047 integrates comprehensive protection. In case of over

temperature, input/output over voltage, winding short, current sense

resistor short, open loop, output short, over load and over current

conditions, it would enter into auto restart if recovering from fault

mode. Cycle-by-Cycle current limiting ensuressafeoperationeven

duringfault mode and recovering.

ETA8047 is for applications up to 50 Watts.

ETA8047 is in a tiny SOT23-6 package.

Efficiency Standards

APPLICATIONS

TYPICAL APPLICATION

ORDERING INFORMATION

PART No.

PACKAGE

TOP MARK

Pcs/Reel

ETA8047S2G

SOT23-6

NH7H

3000