MAX8808XETA+T Maxim Integrated Products, MAX8808XETA+T Datasheet - Page 7

• 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 thermal-regulation loop limits the MAX8808X/
MAX8808Y/MAX8808Z die temperature to +115°C by
reducing the charge current as necessary. This feature
not only protects the ICs from overheating, but also
allows a higher charge current without risking damage
to the system.
The MAX8808X/MAX8808Z contain an active-low logic
input (EN) used to enable the charger. Drive EN low,
leave floating, or connect to GND to enable the
charge-control circuitry. Drive EN high to disable the
Figure
1A Linear Li+ Battery Chargers with Integrated Pass
FET and Thermal Regulation in 2mm x 2mm TDFN
2. Charge-State Diagram
I
CHARGE
EN (MAX8808X/MAX8808Z) and EN
OF I
(MAX8808Y) Charger Enable Input
SET
> 20%
V
BATT
_______________________________________________________________________________________
100% CHARGER CURRENT
< 2.4V
10% CHARGE CURRENT
V
BATT
FAST-CHARGE
CHG = HIGH
CHG = LOW
TOP-OFF
CHG = LOW
< 2.5V
PREQUAL
V
BATT
Thermal Regulation
> 2.5V
MAX8808Y/
MAX8808Z
TO REGULATE BATT AT
TOP-OFF CONTINUES
I
CHARGE
OF I
4.2V
MAX8808X
SET
< 10%
charger-control circuitry. EN has a 200kΩ internal pull-
down resistor.
The MAX8808Y contains an active-high enable input
(EN) to enable the charger. Drive EN high to enable the
charge-control circuitry. Drive EN low to disable the
charger-control circuitry. Do not leave EN floating. It
has no internal pullup or pulldown resistor.
The open-drain ACOK output asserts low when +4.25V
≤ V
an external pullup resistor (100kΩ typ). ACOK is high
impedance during shutdown.
IN
≤ +7V and V
CHARGER = OFF
SHUTDOWN
CHG = HIGH
IN
- V
V
IC DISABLED
BATT
V
IN
BATT
> 7V OR
> V
IN
OR
≥ 40mV. ACOK requires
ASYNCHRONOUS
FROM ANYWHERE
ACOK Output
V
IC DISABLED
BATT
V
IN
> 7V OR
> V
IN
OR
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