AAT3685IWP-4.2-T1 Analogic Tech, AAT3685IWP-4.2-T1 Datasheet - Page 16

• Manufacturer Part Number: AAT3685IWP-4.2-T1
• Description: Battery Management Lithium-Ion/Polymer Battery Charger
• Manufacturer: Analogic Tech

Specifications of AAT3685IWP-4.2-T1

• Package / Case: TDFN33-12
• Mounting Style: SMD/SMT
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

The DATA pin function is active low and should normally
be pulled high to V
pulled high to the same level as the high state for the
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
DATA Report Status
Chip Over-Temperature Shutdown
Battery Temperature Fault
Over-Voltage Turn Off
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
SETH Battery Condition Mode
SETH Charge Reduction in Constant Current Mode
SETH Constant Current Mode
SETH Constant Voltage Mode
SETH End of Charging
SETL Battery Condition Mode
SETL Charge End of Charging Reduction in Constant
Current Mode
SETL Constant Current Mode
SETL Constant Voltage Mode
SETL End of Charging
Data Report Error
Table 3: Serial Data Report Table.
AAT3685
Control
Status
ADP/USB
OUT
IN
TM
. This data line may also be
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
R
PULL_UP
logic I/O port on the system microcontroller. In order for
the DATA pin control circuit to generate clean sharp
edges for the data output and to maintain the integrity
of the data timing for the system, the pull-up resistor on
the data line should be low enough in value so that the
DATA signal returns to the high state without delay. If
the value of the pull-up resistor used is too high, the
strobe pulse from the system microcontroller may
exceed the maximum pulse time and the DATA output
control could issue false status reports. A 1.5kΩ resistor
is recommended when pulling the DATA pin high to 5.0V
at the V
age level less than 5.0V, the pull-up resistor may be
calculated based on a recommended minimum pull-up
current of 3mA. Use the following formula:
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 AAT3685 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
of data pulses will be specified by the T
Lithium-Ion/Polymer Battery Charger
USB
input. If the data line is pulled high to a volt-
LO(DATA)
DATA(RPT)
Eq. 3:
. Upon sensing the rising edge of the
. The period of the following group
GPIO
PRODUCT DATASHEET
R
PULL-UP
AAT3685
≤
μP GPIO
IN
Port
V
OUT
PULL-UP
3mA
DATA
3685.2007.12.1.4
specification.