SG6846C Ver la hoja de datos (PDF) - Fairchild Semiconductor

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SG6846C

Highly Integrated Green-Mode PWM Controller

Fairchild Semiconductor 

Typical Performance Characteristics (Continued)

Normal PWM Frequency (FOSC) vs Temperature

65.0

64.8

64.6

64.4

64.2

64.0

-40 -25 -10 5 20 35 50 65 80 95 110 125

Tem perature (℃)

Figure 12. Normal PWM Frequency (fOSC)

vs. Temperature

Maximum Duty Cycle (DCYmax) vs Temperature

87.0

86.8

86.6

86.4

86.2

86.0

-40 -25 -10 5 20 35 50 65 80 95 110 125

Temperature (℃ )

Figure 13. Maximum Duty Cycle (DCYMAX)

vs. Temperature

Output Current of RT Pin (IRT) vs Tem perature

70.0

69.8

69.6

69.4

69.2

69.0

-40 -25 -10 5 20 35 50 65 80 95 110 125

Tem perature (℃)

Figure 14. Output Current of RT Pin (IRT)

vs. Temperature

FB Output High Voltage (VRTTH) vs Temperature

1.10

1.08

1.06

1.04

1.02

1.00

-40 -25 -10 5 20 35 50 65 80 95 110 125

Tem perature (℃)

Figure 15. FB Output High Voltage (VRTTH)

vs. Temperature

0.910

P WM Turn-on Thres hold V oltage (V IN -ON) v s

T em perat ure

0.905

0.900

0.895

0.890

-40 -25 -10 5 20 35 50 65 80 95 110 125

Temperature (℃)

0.700

P WM Turn-off Thres hold V oltage (V IN -OF F ) v s

Temperature

0.695

0.690

0.685

0.680

-40 -25 -10

5 20 35 50 65 80

Temperature (℃)

95 110 125

Figure 16. PWM Turn-on Threshold Voltage (VIN-ON)

vs. Temperature

Figure 17. PWM Turn-off Threshold Voltage (VIN-OFF)

vs. Temperature

© 2007 Fairchild Semiconductor Corporation

SG6846C • Rev. 1.1.2

9

www.fairchildsemi.com

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