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PDF ACT3704 Data sheet ( Hoja de datos )
| Número de pieza | ACT3704 | |
| Descripción | 12V Linear-Mode Battery Charger | |
| Fabricantes | Active-Semi | |
| Logotipo |  |
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ACT3704
Rev2, 26-Jul-07
12V Linear-Mode Battery Charger for Li+/Li-polymer Cells
FEATURES
• Internal High Voltage MOSFET
• Up to 12V Input Voltage
• ±0.5% Output Voltage Accuracy
• Charge Current Thermal Foldback
• Programmable Termination Voltage
• Programmable Fast Charge Current
• Programmable Charging Timer
• No Blocking Diode Required
• Low Reverse Leakage
• Preconditioning for Deeply Depleted Battery
• Low Quiescent Current Standby Mode
• Space-Saving, Thermally-Enhanced SOP-
8/EP, TDFN33-8
APPLICATIONS
• Mobile Phone
• Wireless Headsets
• Portable Media Players
• Cradle Chargers
• Portable Devices
www.DataSheet4U.com
TYPICAL APPLICATION CIRCUIT
GENERAL DESCRIPTION
The ACT3704 is a complete linear charging solution
for single cell Lithium Ion and Lithium Polymer bat-
teries. It incorporates an internal 12V power MOS-
FET for Constant-Current, Constant-Voltage control
(CC/CV).
The battery regulation voltage accuracy is ± 0.5%
and can be set to either 4.1V or 4.2V. The charge
current is programmed with an external resistor to a
maximum of 1A to minimize total charge time.
The reverse leakage current from the battery is less
than 1µA if the input adaptor is disconnected or if
there is a reverse battery connection. The ACT3704
is available in thermally-enhanced SOP-8/EP, and
TDFN33-8 packages to accommodate high charge
current operation and minimize total charging time.
Innovative Products. Active Solutions.
-1-
www.active-semi.com
Copyright © 2007 Active-Semi, Inc.
1 page  
ACT3704
Rev2, 26-Jul-07
TYPICAL PERFORMANCE CHARACTERISTICS
(VIN = 5V, TA = 25°C, unless otherwise specified.)
Battery Termination Voltage vs. Charge Current
4.50
4.00
3.50
3.00
2.50
2.00
1.50
1.00
0.50
0.00
VIN = 5V
RISET = 27k
ADJ = G
0 200
400 600
IBAT (mA)
800 1000
Charge Current vs. Battery Termination Voltage
600 VIN = 5V
550 RISET = 47k
500 ADJ = G
450
400
350
300
250
200
150
100
50
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
VBAT (V)
Charge Current vs. Supply Voltage
600
Thermal Regulation Circuitry Active
500
400
300
200
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4.5
6.5
8.5 10.5
VIN (V)
VIN = 5V
VBAT = 3.7V
RISET = 47k
12.5
14.5
Charge Current vs. Battery Voltage
575
550
525
500
475
450
425
400
375
350
325 VIN = 5V
300 RISET = 47k
ADJ = G
275
3.00 3.10 3.20 3.30 3.40 3.50 3.60 3.70 3.80 3.90 4.00 4.10
VBAT (V)
Charge Current vs. RISET
1000
900
800
700
600
500
400
300
200
100
VIN = 5V
VBAT = 3.7V
ADJ = G
0
0 50
100
150 200
RISET (k)
250 300 350
Battery Termination Voltage vs. Supply Voltage
4.300
4.275
4.250
4.225
4.200
4.175
4.150
4.125
4.100
RISET = 47k
IBAT = 100mA
ADJ = IN
5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0
VIN (V)
Innovative Products. Active Solutions.
-5-
www.active-semi.com
Copyright © 2007 Active-Semi, Inc.
5 Page 
Table 2:
Safety Timer Settings
CTIMER
(nF)
2.2
3.3
6
10
30
TPRECONDITION
(minutes)
20
30
60
90
210
STATE DIAGRAM
TNORMAL
(minutes)
30
45
90
120
315
ACT3704
Rev2, 26-Jul-07
TTOTAL
(minutes)
60
90
180
270
630
ANY STATE
VIN < 4.0V
SUSPEND
VIN > 4.0V
www.DataSheet4U.com
Time > TPRECONDITION
PRECONDITION
VBAT > 2.8V
VBAT < 2.7V
TIMEOUT-FAULT
Time > TNORMAL
NORMAL
Time > TTOTAL
VBAT = VREG
VBAT < VREG
TOP OFF
IBAT < 10% ICHRG
and T > TEOC
END OF CHARGE
VBAT < VTERM - 0.1V
Innovative Products. Active Solutions.
- 11 -
www.active-semi.com
Copyright © 2007 Active-Semi, Inc.
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet ACT3704.PDF ] | |
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