AAT3688 データシートの表示（PDF） - Advanced Analogic Technologies
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AAT3688 Datasheet PDF : 21 Pages
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BatteryManagerTM
PRODUCT DATASHEET
AAT3688
USB Port Lithium-Ion/Polymer Battery Charger
N
DATA Report Status
1
Chip Over-Temperature Shutdown
2
Battery Temperature Fault
3
Over-Voltage Turn Off
4
Not Used
5
Not Used
6
Not Used
7
Not Used
8
Not Used
9
Not Used
10
Not Used
11
Not Used
12
Not Used
13
USBH Battery Condition Mode
14
USBH Charge Reduction in Constant Current Mode
15
USBH Constant Current Mode
16
USBH Constant Voltage Mode
17
USBH End of Charging
18
USBL Battery Condition Mode
19
USBL Charge End of Charging Reduction in
Constant Current Mode
20
USBL Constant Current Mode
21
USBL Constant Voltage Mode
22
USBL End of Charging
23
Data Report Error
Table 3: Serial Data Report Table.
Data Timing
The system microcontroller should assert an active low
data request pulse for minimum duration of 200ns; this is
specified by TLO(DATA). Upon sensing the rising edge of the
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 TDATA(RPT). The period of the following group of
data pulses will be specified by the TDATA specification.
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.
IN
AAT3688
Status
Control
OUT
16
1.8V to 5.0V
DATA Pin
RPULL_UP
GPIO
Figure 4: Data Pin Application Circuit.
IN
OUT
μP GPIO
Port
www.analogictech.com
3688.2007.12.1.6
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