AAT3673 Datasheet, PDF (21/28 Pages) Skyworks Solutions Inc. – 1.6A Dynamic Battery Charger and Power Manager

DATA SHEET
AAT3673
1.6A Dynamic Battery Charger and Power Manager
Constant Charge
Current (mA)
100
200
300
400
500
800
1000
1600
Set Resistor Value (kΩ)
576
287
191
143
113
69.8
56.2
33.4
Table 4: R_ADP Values.
Figure 4 shows the relationship of constant charging cur-
rent and set resistor values for the AAT3673.
10000
1000
Constant Current
Pre-Conditioning
100
10
1
10
100
1000
10000
R_ADP (kΩ)
Figure 4: Constant Charging Current
vs. Set Resistor Values.
For the AAT3673-3/-6, the two enable inputs select
between four possible operating modes: two internally
fixed charging current modes (USB Low =100mA or USB
high = 500mA), an externally programmable charging
current mode, and a shutdown mode. The STAT1 func-
tionality is identical for all three modes and does not
depend on the EN1 and EN2 enable inputs.
EN1
0
0
1
1
EN2
0
1
0
1
Operating Mode
USB Low, 100mA charging current
USB High, 500mA charging current
Using R_ADP to program charging
current
Shutdown mode
Table 5: AAT3673-3/-6 Operating Modes.
Battery Connection (BAT)
A single cell Li-Ion/Polymer battery should be connected
between BAT input and ground.
Battery Charge Status Indication
Charge Status Indicator Outputs
There are six device options, which are described in Table
11 on page 26. All options include recharge sequence
after adapter is inserted. The AAT3673-1/-4 and AAT3673-
2/-5 have two status (STAT1 and STAT2) pins and one
enable pin (EN); the AAT3673-3/-6 has one status pin
(STAT1) and two enable pins (EN1 and EN2)
Charge State
Pre-Charge
Fast-Charge
Charge Complete
Charge Disabled, Sleep Mode or
Fault Condition
No Battery (with Charge Enabled)
STAT1
ON
ON
OFF
STAT2
ON
OFF
ON
OFF
OFF
Flash (1Hz, Flash (1Hz,
40% duty) 40% duty)
Table 6: AAT3673-1/-4 LED Status Indicators.
Charge State
Pre-Charge or Fast-Charge
Charge Complete, Charge Dis-
abled, or Sleep Mode
Fault Condition
No Battery (with Charge Enabled)
STAT1
ON
OFF
OFF
Flash (1Hz,
40% duty)
STAT2
OFF
OFF
ON
OFF
Table 7: AAT3673-2/-5 LED Status Indicators.
Charge State
Pre-Charge or Fast-Charge
Charge Complete, Charge Disabled, Sleep
Mode, or Fault Condition
No Battery (with Charge Enabled)
STAT1
ON
OFF
Flash (1Hz,
40% duty)
Table 8: AAT3673-3/-6 LED Status Indicators.
Fault condition can be one of the following:
• Battery over-voltage (OV)
• Battery temperature sense hot or cold
• Battery charge timer time-out
• Chip thermal shutdown
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
201881B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 25, 2012
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