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AAT3680ITP-8.4-T1 데이터시트 PDF




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기능 Lithium-Ion Linear Battery Charge Controller
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AAT3680ITP-8.4-T1 데이터시트, 핀배열, 회로
AAT3680
Lithium-Ion Linear Battery Charge Controller
General Description
The AAT3680 BatteryManager™ is a member of
AnalogicTech's Total Power Management IC™
family. This device is an advanced Lithium-Ion (Li-
Ion) battery charge and management IC, specifi-
cally designed for low cost compact portable appli-
cations. In a single 8-pin package, the AAT3680
precisely regulates battery charge voltage and
charge current. This device is capable of two trick-
le charge current levels controlled by one external
pin. Battery charge temperature and charge state
are carefully monitored for fault conditions. In the
event of an over current, short circuit or over tem-
perature failure, the device will automatically shut
down, thus protecting the charging device and the
battery under charge. A battery charge state mon-
itor output pin is provided to indicate the battery
charge status though a display LED. The battery
charge status output is a serial interface which may
also be read by a system microcontroller.
The AAT3680 is available in an 8-pin MSOP or 12-
pin TSOPJW package, specified over -20 to 70°C
range.
Features BatteryManager
• 4.5V to 15V Input voltage range
• 1% Accurate Preset Voltages: 4.1V, 4.2V,
8.2V, 8.4V
• Low operation current, typically 0.5mA
• Programmable Charge Current
• Automatic recharge sequencing
• Battery temperature monitoring
• Deep discharge cell conditioning
• Fast trickle charge option with thermal over-ride
• Full battery charge auto turn off / sleep mode
• Over voltage, current and temperature
protection
• Power on reset
• LED Charge Status Output or System
Microcontroller serial interface
• Temperature range -20 to 70°C
• 8 pin MSOP, 12 pin TSOPJW package
Applications
• Cellular Phones
• Personal Digital Assistants (PDA's)
• Desktop Chargers
• USB Chargers
Typical Application
RSENSE
Q1
0.2
FZT788B
VP
C1
4.7µF
R1
2.5k
DRV
T2X
CSI BAT
AAT3680
VP TS
VSS
STAT
D1
R2
1k
BATT+
C2
10µF
VP
RT1
BATT-
TEMP
Battery
RT2 Pack
3680.2003.4.0.91
1




AAT3680ITP-8.4-T1 pdf, 반도체, 판매, 대치품
AAT3680
Lithium-Ion Linear Battery Charge Controller
Electrical Characteristics (VIN = 4.5V to 15V, TA = -20 to 70°C unless otherwise noted. Typical
values are at TA=25°C)
Symbol Description
Conditions
Min Typ Max Units
IP
ISLEEP
ISTAT(HI)
VSTAT(LOW)
ISINK
VOL@DRV
VCH
VCS
VMIN
VTRICKLE
T2X
VTS1
VTS2
VTERM
VRCH
VUVLO
VOVP
VOCP
Operating Current
Sleep Mode Current
STAT high level output
leakage current
VIN = 5.5V
VIN = 5.5V, VCH = 4.1V, VCH = 4.2V
VCH = 8.2V, VCH = 8.4V
VIN = 5.5V
-1
STAT low level sink current
DRV pin sink current
DRV pin output low
VIN = 5.5V, ISINK = 5mA
VIN = 5.5V
ISINK = 5mA, VIN = 5.5V
AAT3680-4.1
TA = 25°C
see note 1
20
4.075
4.059
Output Charge Voltage
AAT3680-4.2
TA = 25°C
see note 1
AAT3680-8.2
TA = 25°C
see note 1
4.175
4.158
8.151
8.118
AAT3680-8.4
TA = 25°C
see note 1
8.350
8.316
Charge Current Regulation
VIN = 5.5V, VCH = 4.1V, VCH = 4.2V
VIN = 12V, VCH = 8.2V, VCH = 8.4V
AAT3680-4.1
90
90
2.94
Preconditioning Voltage Threshold
AAT3680-4.2
AAT3680-8.2
3.04
5.98
AAT3680-8.4
6.08
Trickle-Charge Current Regulation
T2X
floating
VCH
VCH
=
=
4.1V,
8.2V,
VCH
VCH
=
=
4.2V
8.4V
Trickle Charge Current Gain
T2X = VSS
Low Temperature Threshold
VIN = 15V
High Temperature Threshold
VIN = 15V
Charge termination threshold voltage
29.1
58.2
4
Battery Recharge Voltage Threshold
Undervoltage Lockout
Over-voltage Protection Threshold
VCH = 4.1V
VCH = 4.2V
VCH = 8.2V
VCH = 8.4V
VIN rising, TA = 25°C
3.92
4.018
7.84
8.306
3.5
Over-current Protection Threshold
0.5
2
3
0.3
0.4
4.100
4.100
4.200
4.200
8.200
8.200
8.400
8.400
100
100
3.0
3.1
6.1
6.2
10
10
1.8
30
60
12
4.00
4.10
8.00
8.20
4.0
4.4
200
3 mA
6
10
µA
+1 µA
0.6
1.0
4.125
4.141
4.225
4.242
8.249
8.282
8.450
8.484
110
110
3.06
3.16
6.22
6.32
V
mA
V
V
mV
V
mV
30.9
61.8
24
4.08
4.182
8.16
8.364
4.5
% VP
% VP
mV
V
V
V
% VCS
Note 1: The AAT3680 output charge voltage is specified over 0° to 50°C ambient temperature; operation over -20 to 70°C is guaranteed
by design.
4 3680.2003.4.0.91

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AAT3680ITP-8.4-T1 전자부품, 판매, 대치품
AAT3680
Lithium-Ion Linear Battery Charge Controller
Sleep Mode
When the input supply is disconnected, the charger
automatically enters power-saving sleep mode. Only
consuming an ultra-low 2µA in sleep mode, the
AAT3680 minimizes battery drain when it is not
charging.This feature is particularly useful in applica-
tions where the input supply level may fall below the
battery charge or under-voltage lockout level. In such
cases where the AAT3680 input voltage drops, the
device will enter the sleep mode and automatically
resume charging once the input supply has recov-
ered from its fault condition. This makes the AAT3680
well suited for USB battery charger applications.
Charge Inhibit
The AAT3680 charging cycle is fully automatic;
however, it is possible to stop the device from
charging even when all conditions are met for
proper charging. Switching the TS pin to either VP
or VSS will force the AAT3680 to turn off the pass
device and wait for a voltage between the low and
high temperature voltage thresholds.
Resuming
Threshold
Charge
and
the
VRCH
The AAT3680 will automatically resume charging
under most conditions when a battery charge cycle is
interrupted. Events such as an input supply interrup-
tion or under voltage, removal and replacement of the
battery under charge or charging a partially drained
battery are all possible. The AAT3680 will monitor the
battery voltage and automatically resume charging in
the appropriate mode based upon the measured bat-
tery cell voltage. The feature is useful for systems
with an unstable input supply which could be the case
when powering a charger from a USB bus supply.
This feature is also beneficial for charging or "topping
off" partially discharged batteries.
The only restriction on resuming charge of a bat-
tery is the battery cell voltage must be below the
battery recharge voltage threshold (VRCH) specifi-
cation. There is VRCH threshold hysteresis built into
the charge control system. This is done to prevent
the charger from erroneously turning on and off
one a battery charge cycle is complete.
For example, the AAT3680-4.2 has a typical VRCH
threshold of 4.1V. A battery under charge is above
4.1V, but is still in the constant voltage mode because
3680.2003.4.0.91
it has not yet reached 4.2V to complete the charge
cycle. If the battery is removed and then placed back
on the charger, the charge cycle will not resume until
the battery voltage drops below the VRCH threshold.
In another case, a battery under charge is in the
constant current mode and the cell voltage is 3.7V
when the input supply is inadvertently removed
and then restored. The battery is below the VRCH
threshold and the charge cycle will immediately
resume where it left off.
LED Display
Charge Status Output
The AAT3680 provides a battery charge status output
via the STAT pin. STAT is an open-drain serial data
output capable of displaying five distinct status func-
tions with one LED connected between the STAT pin
and VP. There are four periods which determine a
status word. Under default conditions each output
period is one second long; thus one status word will
take four seconds to display through an LED.
The five modes include:
1. Sleep/Charge Complete: The IC goes into
Sleep mode when no battery is present -OR- When
the charge cycle is complete.
2. Fault: When an Over-Current (OC) condition is
detected by the current sense and control circuit -
OR- When an Over-Voltage (OV) condition is
detected at the BAT pin -OR- When a battery Over-
Temperature fault is detected on the TEMP pin.
3. Battery Conditioning: When the charge system
is in the 1X or 2X trickle charge mode
4. Constant Current (CC) Mode: When the system
is in the constant current charge mode.
5. Constant Voltage (CV) Mode: When the system
is in the constant voltage charge mode.
An additional feature of the LED status display is
for a Battery Not Detected state. When the
AAT3680 senses there is no battery connected to
the BAT pin, the STAT output will turn the LED on
and off at a rate dependant on the size of the out-
put capacitor being used. The LED cycles on for
two periods then remains off for two periods. See
figure 2 below.
7

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AAT3680ITP-8.4-T1

Lithium-Ion Linear Battery Charge Controller

Advanced Analogic Technologies
Advanced Analogic Technologies

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