august 2010 ? 2007 fairchild semiconductor corporation www.fairchildsemi.com fan3988 rev. 1.0.7 fan3988 ? usb/charger and over-voltage detection device fan3988 usb/charger and over-voltage detection device features ? charger/usb detection device ? charger/usb device detection flag ? over-/under-voltage detection flag ? v bus supply: 2.7v to 20v ? c on of 1.5pf ? 6-lead micropak? mlp package applications ? mobile phones ? handheld devices description the fan3988 is a usb-connection-monitoring device used to determine if a standard usb device or a battery- charging 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 bus for over- or under-voltage conditions. the flag2 pin is set low if v bus is less than 3.3v or greater than 6.0v. the fan3988 is packaged in a very small 6-lead micropak? mlp package suitable for small board space applications, such as mobile phones. ordering information part number operating temperature range package packing method quantity fan3988il6x_f113 -40c to +85c 6-lead micropak? mlp package reel 3000 flag 1 comparator ovp uvp flag 2 d- vbus logic gnd std usb/ charger detect d+ logic figure 1. block diagram
? 2007 fairchild semiconductor corporation www.fairchildsemi.com fan3988 ? rev. 1.0.7 2 fan3988 ? usb/charger and over-voltage detection device pin configuration figure 2. pin configuration (top view) pin definitions pin# name type description 1 vbus input power input from charger, usb device, or handheld battery 2 d- input usb data input 3 d+ input usb data input 4 gnd input device ground 5 flag2 output over/under-voltage flag output 6 flag1 output charger/standard usb device detect flag truth table connection state v bus d- d+ flag1 flag2 std usb device 0v 15k to gnd (1) 1.5k to v dd (1) low low usb charger 5v short to d+ short to d- high high v bus gt 6v gt 6v short to d+ short to d- high low v bus lt 3.3v lt 3.3v short to d+ short to d- high low pc data/charger 5v open open low high note: 1. see figure 7.
? 2007 fairchild semiconductor corporation www.fairchildsemi.com fan3988 ? rev. 1.0.7 3 fan3988 ? usb/charger and over-voltage detection device absolute maximum ratings stresses exceeding the absolute maximum ratings may damage the device. the device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. in addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. the absolute maximum ratings are stress ratings only. symbol parameter min. max. unit v bus dc supply voltage -0.3 20.0 v reliability information symbol parameter min. typ. max. unit t j junction temperature +150 c t stg storage temperature range -65 +150 c ja thermal resistance, jedec standard, multi-layer test boards, still air 41 c/w esd information symbol parameter max. unit esd electrostatic discharge information human body model, jesd22-a114 5 kv charged device model, jesd22-c101 2 recommended operating conditions the recommended operating conditions table defines the conditions for actual device operation. recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. fairchild does not recommend exceeding them or designing to absolute maximum ratings. symbol parameter min. typ. max. unit t a operating temperature range -40 +85 c v bus supply voltage range 2.7 5.0 20.0 v
? 2007 fairchild semiconductor corporation www.fairchildsemi.com fan3988 ? rev. 1.0.7 4 fan3988 ? usb/charger and over-voltage detection device dc electrical characteristics t a = 25c, v bus = 5.0v, unless otherwise noted. symbol parameter conditions min. typ. max. units supply v bus supply voltage range v bus range 2.7 5.0 20.0 v i bus quiescent supply current v bus = +5.0v, d+ d- shorted 1.2 2.0 ma t supply power-up stabilization time v bus = +5.0v, d+ d- shorted 10 ms input characteristics c d+ input capacitance 1.5 2.0 pf c d- input capacitance 1.5 2.0 pf i off d+ off leakage current v bus = 0v or 5v v in on d+ = 5v 1 a i off d- off leakage current v bus = 0v or 5v v in on d- = 5v 1 a output characteristics ov detect over-voltage threshold detect v bus = +5.0v, flag2 = low 5.8 6.0 6.5 v ov hyst over-voltage hysteresis voltage sweep through upper and lower trip points 100 mv uv detect under-voltage threshold detect v bus = +5.0v, flag2 = low 3.0 3.3 3.6 v uv hyst under-voltage hysteresis voltage sweep through upper and lower trip points 100 mv v oh flag1/ flag2 minimum high output voltage v bus = +5.0v, i oh = -20a 2.4 v v ol flag1/ flag2 maximum low output voltage v bus = +5.0v, i ol = 20a 0.3 v t off flag2 high to low 100pf load 10 ns t on flag2 low to high 100pf load 44 ns
? 2007 fairchild semiconductor corporation www.fairchildsemi.com fan3988 ? rev. 1.0.7 5 fan3988 ? usb/charger and over-voltage detection device typical performance characteristics v cc = 2.7v-7.0v 0.40 0.50 0.60 0.70 0.80 0.90 1.00 2.70 2.90 3.10 3.30 3.50 3.70 3.90 4.10 4.30 4.50 4.70 4.90 5.10 5.30 5.50 5.70 5.90 6.10 6.30 6.50 6.70 6.90 v cc ma icc v cc =8.0v-21v 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 8 9 10 11 12 13 14 15 16 17 18 19 20 21 v cc ma i cc figure 3. i bus vs. v bus (2.7v-7.0v) no load figure 4. i bus vs. v bus (8.0v-21v) no load figure 5. no fault on flag 1, skew=65ns figure 6. pc data running d+/d- (fla g 1 and flag 2 at correct levels)
? 2007 fairchild semiconductor corporation www.fairchildsemi.com fan3988 ? rev. 1.0.7 6 fan3988 ? usb/charger and over-voltage detection device application information logic 1.5k usb device d- d+ gnd rsense vdd std 15k pull-down on d- input by usb device and 1.5k pull-up on d+ by usb transceiver. usb gnd d+ d- vbus flag 2 flag 1 vbus std usb/ charger detect comparator ovp uvp usb transceiver control logic battery 15k figure 7. typical application system with usb transceiver with usb transceiver (figure 7) 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 bus for over- or under-voltage conditions. the flag2 pin is set low if v bus is less than 3.3v or greater than 6.0v. in a standard usb configuration, there is a switch in the usb transceiver that is always on in the full-speed mode. it is on during the transition from full-speed mode to high-speed mode and is turned off after enumeration is complete. in a condition where d+ and d- are shorted when a charger is plugged into the usb port, the usb switch is on and pulled to v dd , which is about 3v, making both d+ and d- high and flag1 set high ? indicating that a charging device is connected to the port. in a condition where d+ and d- are connected to a standard usb device, the d+ is pulled to v dd and d- is set low (due to the 15k ? pull-down on the usb device) and flag1 is low. if d+ and d- are open (floating), d+ is pulled to v dd and d- floats low, which makes flag1 low. without usb transceiver (figure 8) 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 bus for over- or under-voltage conditions. the flag2 pin is set low if v bus is less than 3.3v or greater than 6.0v. in a condition where a usb transceiver is not incorporated or there is a switch between the usb port and the fan3988, external resistors must be used to set the correct input logic states on the fan3988 d+ d- inputs. a 5m ? pull-down on the d- line and a 1m ? pull- up to v dd (system supply) on the d+ line are recommended. when a condition exists where a charger is plugged into the usb port (d+ d- shorted), the voltage divider of 1m and 5m puts a voltage of 2.3v on the d+ d- inputs and flag1 is high, indicating a charger is connected to port. in a condition where the usb port is connected to a standard usb device, the d+ input is pulled up to v dd (system supply) in parallel with the 1.5k ? on a usb transceiver with a parallel r value of 1.497k ? . the d- input is connected to a 15k ? pull-down by the usb device and in parallel with 5m ? with a parallel r value of 14.955k ? . this condition makes flag1 low. if d+ and d- are open (floating), d+ is pulled to v dd (system supply) and d- floats low, which makes flag1 low.
? 2007 fairchild semiconductor corporation www.fairchildsemi.com fan3988 ? rev. 1.0.7 7 fan3988 ? usb/charger and over-voltage detection device flag 2 5m rsense d- vbus gnd flag 1 std usb/ charger detect 1m usb gnd d+ d- vbus d+ control battery logic logic comparator ovp uvp vdd figure 8. typical system application without usb transceiver
? 2007 fairchild semiconductor corporation www.fairchildsemi.com fan3988 ? rev. 1.0.7 8 fan3988 ? usb/charger and over-voltage detection device physical dimensions 2. dimensions are in millimeters 1. conforms to jedec standard m0-252 variation uaad 4. filename and revision: mac06arev4 notes: 3. drawing conforms to asme y14.5m-1994 top view recommened land pattern bottom view 1.45 1.00 a b 0.05 c 0.05 c 2x 2x 0.55max 0.05 c (0.49) (1) (0.75) (0.52) (0.30) 6x 1x 6x pin 1 detail a 0.075 x 45 chamfer 0.25 0.15 0.35 0.25 0.40 0.30 0.5 (0.05) 1.0 5x detail a pin 1 terminal 0.40 0.30 0.45 0.35 0.10 0.00 0.10 cba 0.05 c c 0.05 c 0.05 0.00 5x 5x 6x (0.13) 4x 6x pin 1 identifier (0.254) 5. pin one identifier is 2x length of any 5 other line in the mark code layout. figure 9. 6-lead micropak? mlp package package drawings are provided as a service to customers considering fairchild components. drawings may change in any manner without notice. please note the revision and/or date on the drawing and contact a fairchild semiconductor representative to ver ify or obtain the most recent revision. 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 www.fairchildsemi.com fan3988 ? rev. 1.0.7 9 fan3988 ? usb/charger and over-voltage detection device
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