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USB/Charger and Over-Voltage Detection Device
Features
Description
The FAN3988 is a USB-connection-monitoring device
used to determine if a standard USB device or a batterycharging device is connected.
Charger/USB Detection Device
Charger/USB Device Detection Flag
Over-/Under-Voltage Detection Flag
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 VBUS for
over- or under-voltage conditions. The FLAG2 pin is set
LOW if VBUS is less than 3.3 V or greater than 6.0 V.
VBUS Supply: 2.7 V to 20 V
CON of 1.5 pF
6-Lead MicroPak™ MLP Package
Applications
The FAN3988 is packaged in a very small 6-lead
MicroPak™ MLP package suitable for small board
space applications, such as mobile phones.
Mobile Phones
Handheld Devices
Ordering Information
Operating
Temperature Range
Part Number
FAN3988IL6X
FAN3988IL6X-F113
(1)
-40°C to +85°C
Package
6-Lead MicroPak™ MLP Package
Packing
Method
Quantity
Reel
5000
Note:
1. Legacy product number; please order FAN3988IL6X for new designs.
VBUS
DD+
Comparator
OVP
UVP
Logic
STD USB /
Charger
Detect
Logic
Flag 2
Flag 1
GND
Figure 1.
© 2007 Semiconductor Components Industries, LLC.
September-2017,Rev.2
Block Diagram
Publication Order Number:
FAN3988/D
FAN3988 — USB / Charger and Over-Voltage Detection Device
FAN3988
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
VBUS (V)
D-
D+
FLAG1
FLAG2
0
Open
Open
LOW
LOW
STD USB Device
0
R to GND
R to GND
LOW
LOW
STD USB Device
5
R to GND
R to GND
LOW
HIGH
USB Charger
5
Short to D+
Short to D-
HIGH
HIGH
VBUS > 6 V
>6
Short to D+
Short to D-
HIGH
LOW
VBUS < 3.3 V
< 3.3
Short to D+
Short to D-
HIGH
LOW
PC Data/Charger
5
Open
Open
LOW
HIGH
STD USB Device
(2)
Note:
2. See Figure 7.
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2
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
VBUS
Parameter
DC Supply Voltage
Min.
Max.
Unit
-0.3
20.0
V
Typ.
Max.
Unit
+150
°C
+150
°C
Reliability Information
Symbol
TJ
Parameter
Min.
Junction Temperature
TSTG
Storage Temperature Range
JA
Thermal Resistance, JEDEC Standard,
Multi-layer Test Boards, Still Air
-65
41
°C/W
ESD Information
Symbol
ESD
Parameter
Electrostatic Discharge Information
Max.
Human Body Model, JESD22-A114
5
Charged Device Model, JESD22-C101
2
Unit
kV
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 data sheet specifications.
ON Semiconductor does not recommend exceeding them or designing to Absolute Maximum Ratings.
Symbol
TA
VBUS
Parameter
Min.
Operating Temperature Range
-40
Supply Voltage Range
2.7
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3
Typ.
Max.
Unit
+85
°C
5.0
20.0
V
FAN3988 — USB / Charger and Over-Voltage Detection Device
Absolute Maximum Ratings
TA = 25°C and VBUS = 5.0 V, unless otherwise noted.
Symbol
Parameter
Condition
Min.
Typ.
Max.
Unit
2.7
5.0
20.0
V
2.0
mA
Supply
VBUS
Supply Voltage Range
VBUS Range
IBUS
Quiescent Supply Current
VBUS = +5.0 V, D+ D- Shorted
1.2
Power-Up Stabilization Time
VBUS = +5.0 V, D+ D- Shorted
10
tSUPPLY
ms
Input Characteristics
CD+
Input Capacitance
1.5
2.0
pF
CD-
Input Capacitance
1.5
2.0
pF
Ioff D+
Off Leakage Current
VBUS = 0 V or 5 V VIN on D+ = 5 V
1
µA
Ioff D-
Off Leakage Current
VBUS = 0 V or 5 V VIN on D- = 5 V
1
µA
Output Characteristics
OVDETECT
Over-Voltage Threshold
Detect
VBUS = +5.0 V, Flag2 = LOW
OVHYST
Over-Voltage Hysteresis
Voltage Sweep through Upper
and Lower Trip Points
UVDETECT
Under-Voltage Threshold
Detect
VBUS = +5.0 V, Flag2 = LOW
UVHYST
Under-Voltage Hysteresis
Voltage Sweep through Upper
and Lower Trip Points
VOH FLAG1/ Minimum HIGH Output
FLAG2
Voltage
VBUS = +5.0 V, IOH = -20 µA
VOL FLAG1/ Maximum LOW Output
FLAG2
Voltage
VBUS = +5.0 V, IOL = 20 µA
IOH FLAG1/
FLAG2
Minimum HIGH Output
Current
IOL FLAG1/
FLAG2
Maximum HIGH Output
Current
6.0
6.5
100
3.0
3.3
3.6
100
2.4
D+ = 3V; D- = 0V-3V or 3V-0V
D- = 3V; D+ = 0V-3V or 3V-0V
USB DCP
(Dedicated Charging Port)
D+/D- = 0V-3V, 3V-0V
toff
Flag2 HIGH to LOW
ton
Flag2 LOW to HIGH
1.025
V
mV
V
mV
2.6
V
0.3
V
-20
USB SDP
(Standard Downstream Port)
D+/DThreshold
5.8
µA
1.300
20
µA
1.365
V
1.450
V
100 pF Load
10
ns
100 pF Load
44
ns
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FAN3988 — USB / Charger and Over-Voltage Detection Device
DC Electrical Characteristics
VCC =8.0V- 21V
VCC =2.7V-7.0V
1.00
1.8
0.90
1.6
1.4
Icc
mA
1.2
0.70
ICC
1
0.60
0.8
0.50
0.6
VCC
Figure 3.
21
20
19
18
17
16
15
14
VCC
IBUS vs. vBUS (2.7 V-7.0 V) No Load
Figure 5.
Figure 6.
13
12
11
9
10
0.4
8
6.90
6.70
6.50
6.30
6.10
5.90
5.70
5.50
5.30
5.10
4.90
4.70
4.50
4.30
4.10
3.90
3.70
3.50
3.30
3.10
2.90
0.40
2.70
mA
0.80
Figure 4.
IBUS vs. vBUS (8.0V-21 V) No Load
No Fault on Flag 1, Skew=65 ns
PC Data Running D+/D- (Flag 1 and Flag 2 at Correct Levels)
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FAN3988 — USB / Charger and Over-Voltage Detection Device
Typical Performance Characteristics
Std 15K pull-down on Dinput and 1.5K pull-up
on D+ by USB
transceiver.
1.5K
Vdd
Control
15K
Battery
USB Transceiver
Rsense
Vout
Vbus
STD USB
Device
(ie USB
Headphones)
Vbus
DD+
Gnd
Comparator
OVP
UVP
Logic
Flag 2
USB
D-
Std USB/
Charger
Detect
D+
Logic
Flag 1
GND
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 VBUS for
over- or under-voltage conditions. The FLAG2 pin is set
LOW if VBUS is less than 3.3 V or greater than 6.0 V.
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 VDD, which is about 3.3 V, 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 VDD and D- is
set LOW (due to the 15 kΩ pull-down in the USB
transceiver) and flag1 is LOW.
If D+ and D- are open (floating), D+ is pulled to VDD and
D- floats LOW, which makes flag1 LOW.
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FAN3988 — USB / Charger and Over-Voltage Detection Device
Application Information
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 VBUS for
over- or under-voltage conditions. The FLAG2 pin is set
LOW if VBUS is less than 3.3 V or greater than 6.0 V.
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 D+ D- inputs. A
5 MΩ pull-down on the D- line and a 1 MΩ pull-up to
VDD (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
1 MΩ and 5 MΩ puts a voltage of 2.75 V on the D+ Dinputs 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 VDD
(system supply) in parallel with the 1.5 kΩ on a USB
transceiver with a parallel R value of 1.497 kΩ. The Dinput is connected to a 15 kΩ pull-down by the USB
device and in parallel with 5 MΩ with a parallel R value
of 14.955 kΩ. 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.
Control
Battery
Rsense
Vbus
Vbus
DD+
Gnd
Comparator
OVP
UVP
Flag 2
Logic
USB
DD+
Std USB/
Charger
Detect
Logic
Flag 1
GND
5M
1M
Vdd
Figure 8.
Typical System Application without USB Transceiver
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FAN3988 — USB / Charger and Over-Voltage Detection Device
Without USB Transceiver (Figure 8)
ON Semiconductor and
are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries.
ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent
coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein.
ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards,
regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or
specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer
application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not
designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification
in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized
application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and
expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such
claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This
literature is subject to all applicable copyright laws and is not for resale in any manner.
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