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QUASI-RESONANT FLYBACK

SWITCHING REGULATORS

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

–

10.7

V

Output Leakage Current

I

CEX

V

––

100

µA

Output Saturation Voltage

V

CE(sat)

STR-S5707, I

––

400

mV

STR-S5708, I

––

400

mV

V

BE(sat)

STR-S5707, I

––

1.5

V

STR-S5708, I

––

1.5

V

DC Current Gain

h

FE

V

29

–

61

–

Maximum ON Time

t

on

33

–

41

µs

Minimum OFF Time

t

off

45

–

55

µs

Over-Current Threshold

V

OCP(th)

-0.88

-1.0

-1.12

V

Sense Voltage

V

SENSE

I

31.7

32.0

32.3

V

Inhibit Threshold Voltage

V

INH(th)

Oscillation stops

0.65

0.75

0.85

V

Oscillation synchronized

–

1.4

2.0

V

Oscillation stops (fault latch set)

3.2

5.1

5.8

V

Latch Holding Current

I

INH

V

––

500

µA

Latch Reset Voltage

V

Q

I

2.5

3.1

–

V

Ref. Voltage Temp. Coeff.

α

VZ

-20

°C ≤ T

–

2.5

–

mV/

°C

Supply Current

I

IN(ON)

Operating

15

–

28

mA

I

IN(OFF)

––

200

µA

Insulation RMS Voltage

V

WM(RMS)

All terminals simultaneous reference

2000

––

V

metal plate against backside

Thermal Shutdown

T

J

125

150

–

°C

Thermal Resistance

Output junction to mounting surface

–

2.0

–

°C/W

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

Typical Data is for design information only.