AAT3688AIWP-4.2-4-T1 AnalogicTech, AAT3688AIWP-4.2-4-T1 Datasheet - Page 16

• Manufacturer Part Number: AAT3688AIWP-4.2-4-T1
• Description: USB Port Lithium-Ion/Polymer Battery Charger
• Manufacturer: AnalogicTech

16
BatteryManager
10
11
12
13
14
15
16
17
18
19
20
21
22
23
N
1
2
3
4
5
6
7
8
9
Table 3: Serial Data Report Table.
USBH Charge Reduction in Constant Current Mode
USBL Charge End of Charging Reduction in
AAT3688
Control
Status
Chip Over-Temperature Shutdown
USBH Battery Condition Mode
USBH Constant Current Mode
USBH Constant Voltage Mode
USBL Battery Condition Mode
USBL Constant Current Mode
USBL Constant Voltage Mode
OUT
Battery Temperature Fault
DATA Report Status
Constant Current Mode
IN
USBH End of Charging
TM
USBL End of Charging
Over-Voltage Turn Off
Data Report Error
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Figure 4: Data Pin Application Circuit.
DATA Pin
w w w . a n a l o g i c t e c h . c o m
1.8V to 5.0V
USB Port Lithium-Ion/Polymer Battery Charger
R
PULL_UP
Data Timing
The system microcontroller should assert an active low
data request pulse for minimum duration of 200ns; this is
specified by T
end of the data request pulse, the AAT3688 status data
control will reply the data word back to the system micro-
controller after a delay specified by the data report time
specification T
data pulses will be specified by the T
Thermal Considerations
The AAT3688 is packaged in a Pb-free, 3x3mm TDFN
package which can provide up to 2.0W of power dissipa-
tion when it is properly bonded to a printed circuit board
and has a maximum thermal resistance of 50°C/W.
Many considerations should be taken into account when
designing the printed circuit board layout, as well as the
placement of the charger IC package in proximity to
other heat generating devices in a given application
design. The ambient temperature around the charger IC
will also have an affect on the thermal limits of a battery
charging application. The maximum limits that can be
expected for a given ambient condition can be estimated
by the following discussion.
LO(DATA)
DATA(RPT)
. Upon sensing the rising edge of the
. The period of the following group of
GPIO
PRODUCT DATASHEET
AAT3688
μP GPIO
IN
Port
OUT
DATA
3688.2007.12.1.6
specification.