FAN54300 Datasheet, PDF (3/43 Pages) Fairchild Semiconductor – USB-Compliant, Dual-Power Input, Single-Cell, Li-Ion Switching Charger with USB-OTG Boost Regulator

Block Diagrams
WALL
CHARGER
INPUT
USB
POWER
INPUT
VIN
C_IN
1F
VREF
C_REF
1F
VBUS
C_BUS
1F
SDA
SCL
OTG
SRST
DIS
Q4
CHARGE
PUMP
VLIMIT
VREF
PWM
Q5
MODULATOR _Q6
2
WALL
POWER
OUTPUT
STAGE
PMID1
Q3
CHARGE
PUMP
VBUS
OVP
I_IN
CONTROL
PWM
MODULATOR
Q1
Q2
Q1A
Q1B
ISNS
DAC
VCC
VREF
I2C
INTERFACE
OSC
PMID
30mA
LOGIC
AND
CONTROL
VREF
USB
POWER
OUTPUT
STAGE
ICHARGE
CONTROL
Figure 2. IC and System Block Diagram
PMID2
C_MID2
4.7F 16V
BOOTV
C_BOOTV
10nF 6.3V
SW2
L2
PMID1
BOOTU
SW1
1H
C_MID1
4.7F
6.3V
C_BOOTU
10nF 6.3V
L1
1H
C_OUT
GND ^0.1F
CSIN
VBAT
R_SENSE
+
Battery
LED
STAT
SYSTEM
LOAD
C_BAT
V2V5
C_2V5
Table 2. Recommended External Components
Component
Description
L1, L2:
Charge Currents to 1 A:
1 H, 20%, 1.3 A, 2016
Charge Currents Above 1 A:
1 H, 20%, 1.6 A, 2520
CBAT
CMID1,2
CIN, CBUS
CBOOT
COUT
C2V5, CREF
10 F, 20%, 6.3 V, X5R, 0603
4.7 F, 10%, 16 V, X5R, 0805
1.0 F, 10%, 16 V, X5R, 0603
10 nF, 10%, 6.3 V, X5R, 0201
0.1 F, 10%, 6.3 V, X5R, 0201
1F, 10%, 6.3 V, X5R, 0402
Vendor
Murata: LQM2MPN1R0M
Murata: LQM2HPN1R0M
Murata: GRM188R60J106M
Murata: GRM21BR61C475K
Murata GRM188R61E105K
Murata GRM033R70J103K
Murata GRM033R60J104K
Murata GRM155R60J105M
Parameter
L
DCR
L
DCR
C
C
C
C
C
C
Typ.
1.0
85
1.0
55
10
4.7
1.0
10
0.1
1.0
Units
H
m
H
m
F
F
F
nF
F
F
© 2010 Fairchild Semiconductor Corporation
FAN54300 • Rev. 1.0.4
3
www.fairchildsemi.com