MAX8808XETA+T Maxim Integrated Products, MAX8808XETA+T Datasheet - Page 6

• 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

1A Linear Li+ Battery Chargers with Integrated Pass
FET and Thermal Regulation in 2mm x 2mm TDFN
The MAX8808X/MAX8808Y/MAX8808Z chargers use
voltage, current, and thermal-control loops to charge a
single Li+ cell and protect the battery
a Li+ battery with a cell voltage below 2.5V is inserted,
the MAX8808X charger enters the prequalification
stage where it precharges that cell with 10% of the
user-programmed fast-charge current
CHG indicator output is driven low to indicate entry into
the prequalification state. When battery voltage
Figure
6
100kΩ
2.8kΩ
_______________________________________________________________________________________
4.25V TO 15V
1. Functional Diagram
V
0.47µF
I/O
1µF
CHG
ISET
VL
IN
N
I
REF
Detailed Description
REF
IN
VL
OUTPUT DRIVER, CURRENT
(Figure
(Figure
REF OK
SENSE, AND LOGIC
UVLO
OVP
IN
1). When
2). The
IN
BATT
ON
exceeds 2.5V, the charger soft-starts as it enters the
fast-charge stage. In the MAX8808X/MAX8808Y/
MAX8808Z, the fast-charge current level is pro-
grammed through a resistor from ISET to GND. As the
battery voltage approaches 4.2V, the charging current
is reduced. If the battery current drops to less than
10% of the fast-charging current, the CHG indicator
goes high impedance, signaling that the battery is fully
charged. The ICs then enter a constant voltage-regula-
tion mode to maintain the battery at full charge.
MAX8808X
MAX8808Y
MAX8808Z
GND
V
REF
LOGIC
+115°C
SENSOR
TEMP
200kΩ
BATT
ACOK
EN (MAX8808Y)
EN
(MAX8808X/
MAX8808Z)
1µF
V
I/O
100kΩ