OFF-LINE

QUASI-RESONANT FLYBACK

SWITCHING REGULATORS

STR-S6709

FUNCTIONAL BLOCK DIAGRAM

AS ABOVE

EXCEPT FOR SINK OUTPUT

ELECTRICAL CHARACTERISTICS at T

enced to Common (pin 2) (unless otherwise noted).

Limits

Characteristic

Symbol

Test Conditions

Min.

Typ. Max.

Units

On-State Voltage

V

INT

Turn-on, increasing V

IN

7.6

8.0

8.4

V

Under-Voltage Lockout

V

INQ

Turn-off, decreasing V

IN

4.6

4.9

5.2

V

Over-Voltage Threshold

V

OVP(th)

9.2

Ð

10.7

V

Output Leakage Current

I

CEX

V

Ð

Ð

100

µA

Output Saturation Voltage

V

CE(sat)

STR-S6707, I

Ð

Ð

400

mV

STR-S6708, I

Ð

Ð

400

mV

STR-S6709, I

Ð

Ð

400

mV

V

BE(sat)

STR-S6707, I

Ð

Ð

1.5

V

STR-S6708, I

Ð

Ð

1.5

V

STR-S6709, I

Ð

Ð

1.5

V

DC Current Gain

h

FE

V

29

Ð

61

Ð

Maximum ON Time

t

on

33

Ð

41

µs

Minimum OFF Time

t

off

45

Ð

55

µs

Over-Current Threshold

V

OCP(th)

-0.9

-1.0

-1.1

V

Feedback Threshold Volt.

V

FDBK(th)

Ð

650

Ð

mV

Inhibit Threshold Voltage

V

INH(th)

Oscillation stops

0.65

0.75

0.85

V

Oscillation synchronized

Ð

1.4

2.0

V

Oscillation stops (fault latch set)

3.2

5.1

5.6

V

Latch Holding Current

I

INH

V

Ð

Ð

500

µA

Latch Reset Voltage

V

Q

I

2.5

3.1

Ð

V

Supply Current

I

IN(ON)

Operating

15

Ð

29

mA

I

IN(OFF)

Ð

Ð

200

µA

Insulation RMS Voltage

V

WM(RMS)

All terminals simultaneous reference

2000

Ð

Ð

V

metal plate against backside

Thermal Shutdown

T

J

125

150

Ð

°C

Thermal Resistance

Output junction to mounting surface

Ð

2.0

Ð

°C/W

NOTES: Negative current is defined as coming out of (sourcing) the specified device terminal.

Typical Data is for design information only.

SINK

20

Ω

4