FAN3988 Fairchild Semiconductor, FAN3988 Datasheet
FAN3988
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FAN3988 Summary of contents
Page 1
... The FAN3988 is a USB-connection-monitoring device used to determine if a standard USB device or a battery-changing device is connected. The FAN3988 sets the FLAG1 pin to logic HIGH or LOW as an indicator to the system controller that a standard USB device or a charger is connected to the USB port. The FAN3988 also monitors the V over- or under-voltage conditions ...
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... BUS V LT 3.3V LT 3.3V BUS PC Data/Charger 5V © 2007 Fairchild Semiconductor Corporation FAN3988 • Rev. 1.0.2 Figure 3. Description Device ground Over/under-voltage flag output Charger/standard USB device detect flag Power input from charger, USB device, or handheld battery USB data input USB data input D- D+ ...
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... Fairchild does not recommend exceeding them or designing to Absolute Maximum Ratings. Symbol T Operating Temperature Range A V Supply Voltage Range CC © 2007 Fairchild Semiconductor Corporation FAN3988 • Rev. 1.0.2 Parameter Parameter Min. -65 Parameter Parameter Min. -40 2.7 3 Min ...
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... Minimum HIGH Output OH FLAG2 Voltage V FLAG1/ Maximum LOW Output OL FLAG2 Voltage t Flag2 HIGH to LOW Off t Flag2 LOW to HIGH on © 2007 Fairchild Semiconductor Corporation FAN3988 • Rev. 1.0.2 Conditions V Range +5.0V Shorted +5.0V Shorted BUS ...
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... Typical Performance Characteristics V = 2.7V-7.0V CC 1.00 0.90 0.80 0.70 0.60 0.50 0. Figure 4. I vs. V (2.7V-7.0V) No Load CC CC Figure 7. © 2007 Fairchild Semiconductor Corporation FAN3988 • Rev. 1.0.2 1.8 1.6 1.4 1.2 Icc 1 0.8 0.6 0.4 Figure 5. Figure 6. No Fault on Flag 1, Skew=65ns PC Data Running D+/D- (Flag 1 and Flag 2 at Correct Levels 8.0V- 21V vs. V (8.0V-21V) No Load ...
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... D+/D- lines and Flag 2 stays LOW, indicating a non-valid V voltage. Since there is no BUS power to the FAN3988, Flag 1 stays LOW, indicating a standard USB device is present. If Flag 2 were to go LOW during normal operation, this would indicate an invalid voltage on the V the baseband chip would prevent an improper voltage being sent directly to the battery. © ...
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... Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2007 Fairchild Semiconductor Corporation FAN3988 • Rev. 1.0 ...
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... Fairchild Semiconductor Corporation FAN3988 • Rev. 1.0.2 8 www.fairchildsemi.com ...