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FSQ0365RLX

Green Mode Fairchild Power Switch (FPS™) for Valley Switching Converter – Low EMI and High Efficiency

Fairchild Semiconductor 

Electrical Characteristics (Continued)

TA=25C unless otherwise specified.

Symbol

Parameter

Conditions

Control Section

tON.MAX1 Maximum On Time1

All but

FSQ321

TJ=25°C

tON.MAX2

tB1

Maximum On Time2

Blanking Time1

FSQ321 TJ=25°C

All but

FSQ321

tB2

tW

fS

IFB

DMIN

VSTART

VSTOP

tS/S1

Blanking Time2

FSQ321

Detection Time Window

Switching Frequency Variation(14)

Feedback Source Current

Minimum Duty Cycle

TJ=25°C, Vsync=0V

-25C < TJ < 85C

VFB=0V

VFB=0V

UVLO Threshold Voltage

After Turn-on

Internal Soft-Start Time 1

All but With Free-Running

FSQ321 Frequency

tS/S2

Internal Soft-Start Time 2

FSQ321

With Free-Running

Frequency

Protection Section

ILIM

VSD

IDELAY

tLEB

VOVP

tOVP

TSD

FSQ0365

Peak Current Limit

FSQ0265

FSQ0165

FSQ321

Shutdown Feedback Voltage

Shutdown Delay Current

Leading-Edge Blanking Time(13)

Over-Voltage Protection

Over-Voltage Protection Blanking

Time

Thermal Shutdown Temperature(13)

TJ=25°C, di/dt=240mA/µs

TJ=25°C, di/dt=200mA/µs

TJ=25°C, di/dt=175mA/µs

TJ=25°C, di/dt=125mA/µs

VCC=15V

VFB=5V

VCC=15V, VFB=2V

Sync Section

VSH

Sync Threshold Voltage

VSL

tSync

Sync Delay Time(13,14)

Total Device Section

IOP

Operating Supply Current

(Control Part Only)

VCC=15V

ISTART Start Current

VCC=VSTART - 0.1V

(Before VCC Reaches VSTART)

ICH

Startup Charging Current

VCC=0V, VSTR=Minimum 40V

VSTR

Minimum VSTR Supply Voltage

Notes:

11. Pulse test: Pulse-Width=300s, duty=2%.

12. Propagation delay in the control IC.

13. Though guaranteed, it is not 100% tested in production.

14. Includes gate turn-on time.

Min.

10.5

6.35

13.2

7.5

700

11

7

1.32

1.06

0.8

0.53

5.5

4.0

5.5

2

125

0.55

0.14

1

270

0.65

Typ.

12.0

7.06

15.0

8.2

3.0

±5

900

12

8

15

10

1.50

1.20

0.9

0.60

6.0

5.0

200

6.0

3

140

0.70

0.20

300

3

360

0.85

26

Max.

13.5

7.77

16.8

±10

1100

0

13

9

1.68

1.34

1.0

0.67

6.5

6.0

6.5

4

155

0.85

0.26

5

450

1.00

Unit

µs

µs

µs

µs

µs

%

µA

%

V

V

ms

ms

A

V

µA

ns

V

µs

°C

V

V

ns

mA

µA

mA

V

© 2007 Fairchild Semiconductor Corporation

FSQ0365, FSQ0265, FSQ0165, FSQ321 • Rev. 1.0.6

7

www.fairchildsemi.com

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