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BC3770 Datasheet(PDF) 37 Page - Freescale Semiconductor, Inc

Part # BC3770
Description  2.0 A Switch-Mode Charger
PDF  45 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

BC3770 Datasheet(HTML) 37 Page - Freescale Semiconductor, Inc

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Analog Integrated Circuit Device Data
37
Freescale Semiconductor
BC3770
6
Typical Applications
6.1
Introduction
The BC3770 can be configured in several applications. Figure 22 shows the BC3770 in a typical application.
6.1.1
Application Diagram
Figure 22. Typical Applications
DC up to 6.2 V
Interrupt
SDA
SCL
Processor
GPIO
Processor
GPIO
1-Cell
Li-Ion
Battery
VBUS
LX
Current
Path
Control
150 C
Tj
PGND
+
VF
/ID
-
BUCK PWM,
CC, CV,
Registers
&I2C
INTERFACE
CONTROL
BLOCK
AICL
OVP
UVLO
+
-
+
-
+
-
THERMAL SHUTDOWN
System I/O
GND
2.2 μF
Application
System
IFAST_CHG
PWM
DRV
VBUS
VTH
Idischarge
+
-
VTrickle
VTH_TRK
Weak
Battery
2.2 μF
PMID
BOOT
+
-
Vprechg
Vpre-chg
Input
Current
Detect
Linear
ITrickle
Iprechg
VBUS
D-
D+
GND
USB/DCP
Adapter
Q1
(50 mΩ)
Q2
(50 mΩ)
Q3
(70 mΩ)
NOBAT
+
-
SDA
SCL
INTB
FS I2C
Interface
VL
CHGENB
VSYS
BC3770
disabled
enabled
1.5 MHz
VL
All other enable
conditions=1
Charger
Enabled
I2C bit,
SUSPEND=0
& CHGEN=1
1-Cell
Li-Ion
Battery
BATSNSN
VL
Internal
Regulator
PMID
+
-
Q4
(30mΩ)
THR
Reduction
100 C
Tj
+
-
THERMAL REGULATION
CHG disabled
CHG enabled
1.0 μF
22 nF
1.0 μH 10 μF
4.7μF
SHDNB
CHGOUT
BATREG
I2C
disable
I2C enabled
I2C disabled
connected on the PCB
VIO



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