FAN5401X Family — USB-Compliant Single-Cell Li-Ion Switching Charger with USB-OTG Boost Regulator
September 2011
FAN54010 / FAN54011 / FAN54012 / FAN54013 /
FAN54014 / FAN54015
USB-Compliant Single-Cell Li-Ion Switching Charger with
USB-OTG Boost Regulator
Features
Fully Integrated, High-Efficiency Charger for Single-Cell
Li-Ion and Li-Polymer Battery Packs
Faster Charging than Linear
Charge Voltage Accuracy:
0.5%
at 25°C
1%
from 0 to 125°C
Description
The FAN54010 family (FAN5401X) combines a highly
integrated switch-mode charger, to minimize single-cell Lithium-
ion (Li-ion) charging time from a USB power source, and a
boost regulator to power a USB peripheral from the battery.
The charging parameters and operating modes are
2
programmable through an I C Interface that operates up to
3.4Mbps. The charger and boost regulator circuits switch at
3MHz to minimize the size of external passive components.
The FAN5401X provides battery charging in three phases:
conditioning, constant current, and constant voltage.
To ensure USB compliance and minimize charging time, the
2
input current is limited to the value set through the I C host.
Charge termination is determined by a programmable
minimum current level. A safety timer with reset control
2
provides a safety backup for the I C host.
The integrated circuit (IC) automatically restarts the charge
cycle when the battery falls below an internal threshold. If the
input source is removed, the IC enters a high-impedance
mode with leakage from the battery to the input prevented.
Charge status is reported back to the host through the I
2
C
port. Charge current is reduced when the die temperature
reaches 120°C.
The FAN5401X can operate as a boost regulator on
command from the system. The boost regulator includes a
soft-start that limits inrush current from the battery.
The FAN5401X is available in a 1.96 x 1.87mm, 20-bump,
0.4mm pitch WLCSP package.
5%
Input Current Regulation Accuracy
5%
Charge Current Regulation Accuracy
20V Absolute Maximum Input Voltage
6V Maximum Input Operating Voltage
1.45A Maximum Charge Rate
Programmable through High-Speed I
2
C Interface
(3.4Mb/s) with Fast Mode Plus Compatibility
–
Input Current
–
–
–
Fast-Charge / Termination Current
Charger Voltage
Termination Enable
3MHz Synchronous Buck PWM Controller with Wide
Duty Cycle Range
Small Footprint 1H External Inductor
Safety Timer with Reset Control
1.8V Regulated Output from VBUS for Auxiliary Circuits
Weak Input Sources Accommodated by Reducing
Charging Current to Maintain Minimum VBUS Voltage
Low Reverse Leakage to Prevent Battery Drain to VBUS
5V, 500mA Boost Mode for USB OTG for 3.0 to 4.5V
Battery Input
Applications
Cell Phones, Smart Phones, PDAs
Tablet, Portable Media Players
Gaming Device, Digital Cameras
Figure 1. Typical Application
www.fairchildsemi.com
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© 2011 Fairchild Semiconductor Corporation
FAN5401X Family • Rev. 1.0.2
FAN5401X Family — USB-Compliant Single-Cell Li-Ion Switching Charger with USB-OTG Boost Regulator
Ordering Information
Part Number
FAN54010UCX
FAN54011UCX
FAN54012UCX
(1)
(1)
(1)
Temperature Range
-40 to 85°C
-40 to 85°C
-40 to 85°C
-40 to 85°C
-40 to 85°C
-40 to 85°C
Package
20-Bump, Wafer-Level
Chip-Scale Package
(WLCSP),
0.4mm Pitch,
Estimated Size:
1.96 x 1.87mm
PN Bits:
IC_INFO[4:2]
011
001
011
101
111
101
Packing Method
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
FAN54013UCX
FAN54014UCX
(1)
FAN54015UCX
(1)
Note:
1. Preliminary release only; please contact a Fairchild representative for information about part availability.
Table 1. Feature Comparison Summary
Part Number
FAN54010UCX
FAN54011UCX
FAN54012UCX
FAN54013UCX
FAN54014UCX
FAN54015UCX
PN Bits:
REG3[4:2]
011
001
011
101
111
101
Slave
Address
1101011
1101011
1101011
1101011
1101011
1101010
Automatic
Charge
Yes
No
Yes
Yes
No
Yes
Special
Charger
(2)
No
No
No
Yes
Yes
Yes
Safety
Limits
No
No
No
Yes
Yes
Yes
Battery
Absent
Behavior
OFF
OFF
ON
OFF
OFF
ON
E2 Pin
AUXPWR
(Connect
to VBAT)
VREG
(E3 Pin)
PMID
DISABLE
1.8V
Note:
2. A “special charger” is a current-limited charger that is not a USB compliant source.
Table 2. Recommended External Components
Component
L1
Description
1H ±20%, 1.6A
DCR=55m, 2520
1H ±30%, 1.4A
DCR=85m, 2016
10F, 20%, 6.3V, X5R, 0603
4.7F, 10%, 6.3V, X5R, 0603
1.0F, 10%, 25V, X5R, 0603
Vendor
Murata: LQM2HPN1R0
Parameter
L
Typ.
1.0
Unit
H
Murata: LQM2MPN1R0
Murata: GRM188R60J106M
TDK: C1608X5R0J106M
Murata: GRM188R60J475K
TDK: C1608X5R0J475K
Murata GRM188R61E105K
TDK:C1608X5R1E105M
C
C
(3)
C
10
4.7
1.0
F
F
F
C
BAT
C
MID
C
BUS
Note:
3. A 6.3V rating is sufficient for C
MID
since PMID is protected from over-voltage surges on VBUS by Q3 (Figure 3).
© 2011 Fairchild Semiconductor Corporation
FAN5401X Family • Rev. 1.0.2
www.fairchildsemi.com
2
FAN5401X Family — USB-Compliant Single-Cell Li-Ion Switching Charger with USB-OTG Boost Regulator
Block Diagram
Figure 2. IC and System Block Diagram
VBUS
C
IN1
Q3
PMID
C
IN2
Q1
CHARGE
PUMP
Q1A
Q1B
CSIN
SW
L1
1H
PMID
Greater than V
BAT
Less than V
BAT
Q1A
ON
OFF
Q1B
OFF
ON
Q2
C
OUT
PGND
VBAT
SYSTEM
LOAD
R
SENSE
68m
+
Battery
C
BAT
Figure 3. Power Stage
© 2011 Fairchild Semiconductor Corporation
FAN5401X Family • Rev. 1.0.2
www.fairchildsemi.com
3
FAN5401X Family — USB-Compliant Single-Cell Li-Ion Switching Charger with USB-OTG Boost Regulator
Pin Configuration
A1
A2
A3
A4
A4
A3
A2
A1
B1
B2
B3
B4
B4
B3
B2
B1
C1
C2
C3
C4
C4
C3
C2
C1
D1
D2
D3
D4
D4
D3
D2
D1
E1
E2
E3
E4
E4
E3
E2
E1
Top View
Figure 4. WLCSP-20 Pin Assignments
Bottom View
Pin Definitions
Pin #
A1, A2
A3
A4
B1-B3
B4
C1-C3
C4
D1-D3
D4
E1
E2
Name
VBUS
NC
SCL
PMID
SDA
SW
STAT
PGND
OTG
CSIN
AUXPWR
Part # Description
ALL
ALL
ALL
ALL
ALL
ALL
ALL
ALL
ALL
ALL
Charger Input Voltage
and USB-OTG output voltage. Bypass with a 1F capacitor to PGND.
No Connect.
No external connection is made between this pin and the IC’s internal circuitry.
I
2
C Interface Serial Clock.
This pin should not be left floating.
Power Input Voltage.
Power input to the charger regulator, bypass point for the input current
sense, and high-voltage input switch. Bypass with a minimum of 4.7F, 6.3V capacitor to PGND.
I
2
C Interface Serial Data.
This pin should not be left floating.
Switching Node.
Connect to output inductor.
Status.
Open-drain output indicating charge status. The IC pulls this pin LOW when charging.
Power Ground.
Power return for gate drive and power transistors. The connection from this pin
to the bottom of C
MID
should be as short as possible.
On-The-Go.
Enables boost regulator in conjunction with OTG_EN and OTG_PL bits
(see Table
16).
On VBUS Power-On Reset (POR), this pin sets the input current limit for t
15MIN
charging.
Current-Sense Input.
Connect to the sense resistor in series with the battery. The IC uses this
node to sense current into the battery. Bypass this pin with a 0.1F capacitor to PGND.
00, 01,
Auxiliary Power.
Connect to the battery pack to provide IC power during High-Impedance
02
Mode. Bypass with a 1F capacitor to PGND.
Charge Disable.
If this pin is HIGH, charging is disabled. When LOW, charging is controlled by
03, 04,
the I
2
C registers. When this pin is HIGH, the 15-minute timer is reset. This pin does not affect
05
the 32-second timer.
ALL
Regulator Output.
Connect to a 1F capacitor to PGND. This pin can supply up to 2mA of DC
load current. For FAN54010-FAN54012, the output voltage is PMID, which is limited to 6.5V. For
FAN54013-FAN54015, the output voltage is regulated to 1.8V.
Battery Voltage.
Connect to the positive (+) terminal of the battery pack. Bypass with a 0.1F
capacitor to PGND if the battery is connected through long leads.
E2
DISABLE
E3
VREG
E4
VBAT
ALL
© 2011 Fairchild Semiconductor Corporation
FAN5401X Family • Rev. 1.0.2
www.fairchildsemi.com
4
FAN5401X Family — USB-Compliant Single-Cell Li-Ion Switching Charger with USB-OTG Boost Regulator
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
V
BUS
V
STAT
V
I
V
O
dV
BUS
dt
Parameter
VBUS Voltage
STAT Voltage
PMID Voltage
SW, CSIN, VBAT, AUXPWR, DISABLE Voltage
Voltage on Other Pins
Maximum V
BUS
Slope above 5.5V when Boost or Charger are Active
Electrostatic Discharge
Protection Level
Junction Temperature
Storage Temperature
Lead Soldering Temperature, 10 Seconds
Human Body Model per JESD22-A114
Charged Device Model per JESD22-C101
Continuous
Pulsed, 100ms Maximum Non-Repetitive
Min.
–1.4
–2.0
–0.3
–0.3
–0.3
Max.
20.0
16.0
7.0
7.0
6.5
(4)
4
2000
500
Unit
V
V
V
V
V/s
V
ESD
T
J
T
STG
T
L
–40
–65
+150
+150
+260
°C
°C
°C
Note:
4. Lesser of 6.5V or V
I
+ 0.3V.
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
V
BUS
V
BAT(MAX)
dV
BUS
dt
Parameter
Supply Voltage
Maximum Battery Voltage when Boost enabled
Negative VBUS Slew Rate during VBUS Short Circuit,
C
MID
< 4.7F
(see VBUS Short While Charging)
Ambient Temperature
Junction Temperature
(see Thermal Regulation and Protection section)
T
A
< 60°C
T
A
> 60°C
Min.
4
Max.
6
4.5
4
2
Unit
V
V
V/s
°C
°C
T
A
T
J
–30
–30
+85
+120
Thermal Properties
Junction-to-ambient thermal resistance is a function of application and board layout. This data is measured with four-layer
2s2p boards in accordance to JEDEC standard JESD51. Special attention must be paid not to exceed junction temperature
T
J(max)
at a given ambient temperature T
A
.
For measured data, see Table 11.
Symbol Parameter
JA
JB
Junction-to-Ambient Thermal Resistance
Junction-to-PCB Thermal Resistance
Typical
60
20
Unit
°C/W
°C/W
© 2011 Fairchild Semiconductor Corporation
FAN5401X Family • Rev. 1.0.2
www.fairchildsemi.com
5
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