© 2009 Fairchild Semiconductor Corporation

www.fairchildsemi.com

FSBH0F70A, FSBH0170/A, FSBH0270/A, FSBH0370 • Rev. 1.0.3

8

Symbol

Parameter

Condition

Min.

Typ.

Max.

Unit

Output High Voltage

FB Pin Open

5.5

V

Green-Mode Entry FB Voltage

2.3

2.5

2.7

V

Green-Mode Ending FB Voltage

1.9

2.0

2.1

V

Zero Duty Cycle FB Voltage

1.6

V

FB Open-Loop

Trigger Level

FSBH0F70A

5.2

5.4

5.6

V

FSBH0x70/A

4.4

4.6

4.8

V

FB Open-Loop Protection Delay

50

56

59

ms

Current-Sense Section

(14)

Peak Current Limit

FSBH0F70A

0.63

0.73

0.83

A

FSBH0170/A

0.70

0.80

0.90

FSBH0270/A

0.90

1.00

1.10

FSBH0370

1.10

1.20

1.30

Period During Soft-Start Time

(10)

4.5

5.0

5.5

ms

Constant Power Limit (FSBH0170, FSBH0270, FSBH0370)

Threshold Voltage 1 for Current Limit

0.73

0.80

0.87

V

Threshold Voltage 2 for Current Limit

0.56

0.63

0.70

V

Current Limit (FSBH0F70A, FSBH0170A, FSBH0270A)

Threshold Voltage for Current Limit

FSBH0F70A

0.97

1.00

1.03

V

FSBH0170A/0270A

0.77

0.80

0.83

V

Over-Temperature Protection Section (OTP)

Protection Junction Temperature

(10, 12)

+135

+142

+150

°C

Restart Junction Temperature

(10, 13)

°C

Notes:

10. These parameters, although guaranteed, are not 100% tested in production.

11. Pulse test: pulse width ≤ 300ìs, duty ≤ 2%.

12. When activated, the output is disabled and the latch is turned off.

13. The threshold temperature for enabling the output again and resetting the latch after over-temperature

protection has been activated.

14. These parameters, although guaranteed, are tested in wafer process.

PWM Frequency