STR-Y6763, STR-Y6765, and STR-Y6766

Description

The STR-Y6763, STR-Y6765, and STR-Y6766 each comprise

a power MOSFETand a multi-functional monolithic integrated

circuit (MIC) controller designed for controlling switch mode

power supplies.The quasi-resonant mode of operation, coupled

with the bottom-skip function, allows high efficiency and low

noise at low to high operational levels, while burst oscillation

mode ensures minimum power consumption at standby.

In order to sustain low power consumption under low load and

in standby mode, the controller has built-in startup and standby

circuits. This enables output power for the STR-Y6763 up

to 50 W with universal input or 80 W with a 380 VDC input,

STR-Y6765 up to 70 W with universal input or 120 W with

a 380 VDC input and for the STR-Y6766 up to 80 W with

universal input or 140 W with a 380 VDC input.

The compact 7-pin full mold package (TO220F-7L) reduces

board space by requiring a minimum of external components,

thus simplifying circuit design. This IC, including various

protection functions, is an excellent choice for standardized,

compact power supplies.

Features and Benefits

• TO–220F–7L package

• Lead (Pb) free compliance

• The built-in startup circuit reduces the number of external

components and lowers standby power consumption

• Multi-mode control allows high efficiency operation

across the full range of loads

• Auto burst oscillation mode for standby mode, for

improving low standby power at no load: input power

< 30 mW at 100 VAC and < 50 mW at 230 VAC

• Bottom-skip mode minimizes switching loss at medium to

low loads

2.2 Ω (STR-Y6765) or 1.7 Ω (STR-Y6766)

• Built-in soft start function reduces stress applied to the

incorporated power MOSFET and peripheral components

• Step-on burst oscillation minimizes transformer

audible noise

• Built-in leading edge blanking (LEB) function eliminates

Off-Line Quasi-Resonant Switching Regulators

Not to scale

Package: 7-Pin TO-220F

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Typical Application

GND

Error Amp

VCC

Controller

Chip (MIC)

STR-Y6700

GND

/

OLP

FB

BD

C1

P

S

T1

D

C2

DZ

D1

R2

BD

R

C4

PC1

C3

R

PC1

D/ST

S/OCP

BD1

NF

R3

D2

C5

OCP

R4

R5

VAC

3

1

6

5

4

2

7

The NF pin (No. 7) should be connected

to the GND pin (No. 4), which should be

at a stable ground potential, to ensure

stability of operation.

STR-Y6763-DS

SANKEN ELECTRIC CO., LTD.