AIC AIC1782CS, AIC1782 Datasheet
AIC1782
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Dual-Battery Charge Controller
FEATURES
Quick and Easy Testing for Production.
Sequential Charging Control of Two
NiMH/NiCd Battery Packs.
Reliable Sequential Fast Charge Control of
Dual NiMH and/or NiCd Battery Packs, even
with a Fluctuating Charging Current.
Fast Charge Termination by:
, Safety Timer, Maximum Temperature,
0V∆
∆∆T
t, −∆V
,
Maximum Voltage.
Safety Timer and
∆∆T
Detection Slope
t
Linearly Adjustable.
Battery Voltage Protection Range Selectable.
Mode of Battery Temperature Protection Se-
lectable.
Protection against Battery Voltage and Battery
Temperature Faults.
Selectable LED Display Mode for Battery
Status.
Five Pulsed Trickle Charge Modes.
Discharge-before-Charge Function Available to
Eliminate Memory Effect.
20-pin DIP or SO Packages.
APPLICATIONS
Dual-Battery Fast Chargers for:
Mobile Phones.
Notebook and Laptop Personal Computers.
Portable Power Tools and Toys.
Portable Communication Equipments.
Portable Video & Stereo Equipments.
1.55
Charge Current = 600mA
Cell Capacity = 550mA
NiMH Battery
1.45
1.35
Cell Voltage (V)
1.25
1.15
0
Fig. 1 Battery Charging Characteristics Resulted from
an AIC1782-Controlled Charger with a Fluctuating Charging Current
Cell Voltage
Temperature
10 20 30 40 50 60
Charge Time (min.)
100
80
60
40
20
C)
°
Temperature (
DESCRIPTION
The AIC1782 fast charge controller is designed
for intelligent sequential charging of dual NiMH
and NiCd batteries without the risk of malfunction.
After powered on, the AIC1782 charging se-
quence gives priority to battery pack A, repre-
sented by input signals of ATS and ABV pins,
over battery pack B, represented by BTS and
BBV pin signals. The AIC1782 automatically
switches charging current to charge the standby
battery pack after the battery pack being charged
finishes its charging or encounters a fault condi-
tion.
(-0.25%) detection,
−∆V
timer) detection, and
∆∆T
(peak voltage
0V∆
detection are the
t
primary methods employed by the AIC1782 to
terminate fast charge. The fast charge can also
be cut off by maximum battery voltage and
maximum battery temperature detection along
with the safety timer to prevent charging under
fault conditions of the charging system or the
∆∆T
.
and
t
detection methods have
−∆V
battery itself
Both
been proved powerful in terminating fast charging
for NiMH and NiCd batteries. The AIC1782 utilizes
the combination of these two methods to achieve
reliable decision of ending fast charge and prevent
misaction caused by using
detection alone
−∆V
under certain conditions. Fig. 1 shows an example
of charging curve of a battery charged by a fluc-
tuating current from a NiMH battery charger which
uses the AIC1782 controller IC to achieve optimal
charging. The
∆∆T
or
t
detection circuitry
−∆V
may be disabled independently for different appli-
cations, such as system-integrated chargers,
chargers with varying charge current, or battery
packs lack of temperature sensing thermistor.
Analog Integrations Corporation
DS-1782-00
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC www.analog.com.tw
TEL: 886-3-5772500 FAX: 886-3-5772510
1
AIC1782
The safety timer period, mode of battery tem-
perature protection, battery voltage protection
range, pulsed trickle charge duty, and LED dis-
play mode are all adjustable or selectable. Dis-
charge-before-charge function is included to get
TYPICAL APPLICATION CIRCUIT
+
(5V)
CC
1N4148
C11
220µF
R33
47K
D3
D6
1N4148
RS
0.1/2W
D2
1N4148
D7
1N4148
R22
470
3904
R25
470
3904
A1012
Q2
Q3
A1012
Q4
Q5
R23
330
R26
330
1N5820
C10
1nF
V
IN
SC
SE
TC
GND
AIC1563
BST
VCC
R27
4.7K
R28
4.7K
R34
1K
A1012
Q6
R29
R30
150
220
IS
+
FB
V
IN
C9
100µF
L1
200µH
D1
1N5821
78L05
V
D4
V
R21
2.7K
1N5820
D5
VCC(5V)
R24
2.7K
rid of memory effect of NiCd batteries without the
risk of overdischarging. Test mode is provided for
charger manufactures to dramatically reduce
production test time.
R1
R6
+
R7
R32
680
B
C5
0.1µF
C8
0.1µF
R37
3.9K
R35
1.5K
(5V)
CC
R5
20/5W
Q1
D468
B2
BATTERY B
THERMISTOR
B1
BATTERY A
THERMISTOR
R3
100K
+
R2
C1
4.7µF
100K
R8
C3
4.7µF
VCC 5V
R4
390
LED5
Q7
D468
R10
R11
+
C6
100µF
(5V)
V
CC
R16A R15
C4
0.1µF
+
2.2µF
C12
C7
0.1µF
LED1
C2
0.1µF
V
R13
D8
1N4148
1M
R36
(5V)
CC
R14
100K
R17
680
R12
1
ABV
2
BBV
AIC1782
3
DIS
4
BTS
5
VCC
6
ADJ
7
SEL3
8
TMR
9
ATS
10
LEA1
DSW
ICOB
LEB2
LEB1
GND
SEL1
SEL2
MODE
ICOA
LEA2
20
SW1
19
LED4
R20
18
680
LED3
R19
17
680
16
15
14
13
12
LED2
R18
11
680
Battery Charger for Dual NiMH and NiCd Battery
2
ORDERING INFORMATION
A
A
A
A
A
A
(
)
IC1782 XX
ORDER NUMBER
AIC1782
PIN CONFIGURATION
1
PACKAGE TYPE
N: PLASTIC DIP
S: SMALL OUTLINE
TEMPERATURE RANGE
C= 0°C~70°C
ABSOLUTE MAXIMUM RATINGS
IC1782 CN
(PLASTIC DIP)
IC1782 CS
(PLASTIC SO)
ABV
2
BBV
3
DIS
4
BTS
5
VCC
6
ADJ
7
SEL3
813
TMR
9
ATS
10
LEA1
Supply Voltage .........................................................……………........................... 5.5V
DC Voltage Applied on any Pin .......................................…………........................ 5.5V
Sink Current of ICOA Pin, LEA1 and LEA2 Pins ................………...................... 20mA
Sink Current of ICOB Pin, LEB1 and LEB2 Pins ................……......................... 20mA
Operating Temperature Range ....................................…………................... 0°C~ 70°C
Storage Temperature Range ...........................................…………......... -65°C~ 150°C
20
19
18
17
16
15
14
12
11
DSW
ICOB
LEB2
LEB1
GND
SEL1
SEL2
MODE
ICOA
LEA2
TEST CIRCUIT
V
CC
Voltage
Source
V1
-+
Voltage Source
-+
YELLOW
-+
Voltage Source
VCC (5V)
V
CC
0.95V
V2 (3V)
-+
Voltage Source
RED
R6
560
BV DSW
BBV ICOB
R1
DIS LEB2
560
BTS LEB1
VCC GND
DJ SEL1
SEL3 SEL2
100K
TMR MODE
R2
TS ICOA
LEA1 LEA2
AIC1782
R8
560
R7
560
R3
560
R4
560
R5
560
ORANGE
GREEN
RED
V
CC
V
CC
V
CC
ORANGE
GREEN
3
AIC1782
ELECTRICAL CHARACTERISTICS
fied.)
PARAMETER TEST CONDITIONS SYMBOL MIN. TYP. MAX. UNIT
Supply Voltage V
Supply Current I
Battery Low V
Before Initial Timer V
After Initial Timer
(SEL3>3V) 0.63 0.69 0.75
Voltage Protection Limit
Battery High
Temperature Sense
Limit Temperature Low V
Temperature High V
(SEL3<2V) 1.1 1.2 1.3
(SEL3>3V) 2.6 2.7 2.8
(SEL3<2V) 1.9 2.0 2.1
(Ta=25°°°°C, VCC=5V, unless otherwise speci-
CC
CC
ABV
BBV
ATS
BTS
4.5 5 5.5 V
1.1 mA
0.11 0.16 0.21
1.35 1.45 1.55
3.5 3.6 3.7
V
V
Output impedance of DIS
Pin
Output Impedance
Source Current
Capability
Input Impedance
Recommended External
Resistor of TMR pin
detection level w.r.t.*
−∆V
Peak Value
Z
DIS
LEA1, LEA2, LEB1,
LEB2, ICOA, ICOB pins
ON
OFF 1
SEL3 pin
DSW pin
MODE, SEL1, SEL2
pins 300 KΩ
ABV, BBV, ATS, BTS,
ADJ pins 1 MΩ
I
SEL3
I
DSW
R
TM
R
2 100 1000 KΩ
140 250 Ω
25 50 Ω
MΩ
5.5
16
-0.25 %
µA
µA
*: with respected to
4
AIC1782
TYPICAL PERFORMANCE CHARACTERISTICS
V
=5V, refer to Test Circuit)
CC
1.18
Supply Current vs Supply Voltage
1.12
1.06
Supply Current (mA)
1.00
4.4 4.6 4.8 5.0 5.2 5.4
81.0
80.5
80.0
Safety Timer (min.)
79.5
79.0
4.4 4.6 4.8 5.0 5.2 5.4
Safety Timer vs Supply Volatge
VCC (V)
82.0
81.0
Safety Timer vs Temperature
1.26
1.14
Supply Current vs Temperature
(Ta=25°°°°C, R2=100KΩΩΩΩ,
V
(V)
CC
80.0
Safety Timer (min.)
79.0
0 20406080
Temperature(°C)
ABV and BBV (High) Limit vs Temperature
(SEL3>3V)
2.74
2.70
2.66
ABV, BBV (V)
2.62
020406080
Temperature (°C)
1.02
Supply Current (mA)
0.90
0 20406080
Temperature (°C)
ABV and BBV (High) Limit vs Temperature
(SEL3<2V)
2.03
2.02
2.00
ABV, BBV (V)
1.98
0 20406080
Temperature (°C)
5
AIC1782
TYPICAL PERFORMANCE CHARACTERISTICS
ABV and BBV (Low) Limit vs Temperature
(Before Initial Timer)
0.163
0.162
0.160
ABV, BBV (V)
0.158
020406080
29
)
Ω
27
25
Output Im pedance(
23
0 20406080
Temperature (°C)
ABV and BBV (Low ) limits vs Temperature
(SEL3<2V, After Initial Timer)
1.22
0.710
0.705
(Continued)
Output Impedance vs Temperature
(LEA’s, LEB’s, ICO’s pins)
Temperature(°C)
ABV and BBV (Low) limits vs Temperature
(SEL3>3V, After Initial Timer)
1.21
ABV, BBV (V)
1.20
1.19
0
20 40 60
80
Temperature (°C)
ATS and BTS (High) Limit vs Temperature
3.62
3.61
3.60
ATS, BTS (V)
3.59
3.58
020406080
Temperature (°C)
0.700
ABV, BBV (V)
0.695
0.690
0 20406080
Temperature (°C)
ATS and BTS (Low) Limit vs Temperature
1.48
1.46
ATS, BTS (V)
1.44
1.42
020406080
Temperature (°C)
6
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