MAX8808XETA+T Maxim Integrated Products, MAX8808XETA+T Datasheet - Page 10

• Manufacturer Part Number: MAX8808XETA+T
• Description: IC CHARGER LI+ SGLL CCCV 8TDFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX8808XETA+T

• Function: Charge Management
• Battery Type: Lithium-Ion (Li-Ion)
• Voltage - Supply: 0 V ~ 15 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-TDFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The universal serial bus (USB) provides a high-speed
serial communication port as well as power for the
remote device. The MAX8808X/MAX8808Y/MAX8808Z
can be configured to charge a battery at the highest
current possible from the host port.
MAX8808X as a USB battery charger. To make the cir-
cuit compatible with either 100mA or 500mA USB ports,
the circuit initializes at 100mA charging current. The µP
then enumerates the host to determine its current capa-
bility. If the host port is capable, the charging current is
increased to 425mA to avoid exceeding the 500mA
USB specification.
1A Linear Li+ Battery Chargers with Integrated Pass
FET and Thermal Regulation in 2mm x 2mm TDFN
Figure
10
______________________________________________________________________________________
5. USB Battery Charger
USB PORT
VBUS
GND
D+
D-
0.47µF
USB-Powered Li+ Charger
13kΩ
C3
R2
1µF
C1
Figure
IN
CHG
VL
ISET
4kΩ
R1
5 shows the
MAX8808XETA
N
ACOK
BATT
GND
EN
Place the input capacitor as close to the device as pos-
sible. Provide a large copper ground plane to allow the
exposed paddle to sink heat away from the device.
Connect the battery to BATT as close to the device as
possible to provide accurate battery voltage sensing.
Make all high-current traces short and wide to minimize
voltage drops. A sample layout is available in the
MAX8808 evaluation kit to speed designs.
HIGH: 425mA, LOW: 100mA
C2
1µF
4.2V
Li+
100kΩ
V
I/O
R3
R4
100kΩ
V
I/O
Layout and Bypassing
SYSTEM