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FSBH0270NY Datasheet(PDF) 8 Page - Fairchild Semiconductor |
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FSBH0270NY Datasheet(HTML) 8 Page - Fairchild Semiconductor |
8 / 16 page © 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FSBH0F70A, FSBH0170/A, FSBH0270/A, FSBH0370 • Rev. 1.0.3 8 Electrical Characteristics (Continued) VDD=15V and TA=25°C unless otherwise specified. Symbol Parameter Condition Min. Typ. Max. Unit VFB-OPEN Output High Voltage FB Pin Open 5.5 V VFB-N Green-Mode Entry FB Voltage 2.3 2.5 2.7 V VFB-G Green-Mode Ending FB Voltage 1.9 2.0 2.1 V VFB-ZDC Zero Duty Cycle FB Voltage 1.6 V VFB-OLP FB Open-Loop Trigger Level FSBH0F70A 5.2 5.4 5.6 V FSBH0x70/A 4.4 4.6 4.8 V tD-OLP FB Open-Loop Protection Delay 50 56 59 ms Current-Sense Section (14) ILIM Peak Current Limit FSBH0F70A VIN Open 0.63 0.73 0.83 A FSBH0170/A VIN = 1.2V / VIN Open 0.70 0.80 0.90 FSBH0270/A VIN = 1.2V / VIN Open 0.90 1.00 1.10 FSBH0370 VIN = 1.2V 1.10 1.20 1.30 tSS Period During Soft-Start Time (10) 4.5 5.0 5.5 ms Constant Power Limit (FSBH0170, FSBH0270, FSBH0370) VLMT1 Threshold Voltage 1 for Current Limit VIN = 1.2V 0.73 0.80 0.87 V VLMT2 Threshold Voltage 2 for Current Limit VIN = 3.6V 0.56 0.63 0.70 V Current Limit (FSBH0F70A, FSBH0170A, FSBH0270A) VLMT 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) TOTP Protection Junction Temperature (10, 12) +135 +142 +150 °C TRESTART Restart Junction Temperature (10, 13) TOTP-25 °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. Figure 5. VFB vs. PWM Frequency PWM Frequency fOSC fOSC-G VFB-N VFB-G VFB-ZDC VFB |
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