AIC AIC1784

AIC1784
Battery Charge Controller
FEATURES
DESCRIPTION
Fast Charge Control of NiMH/NiCd Batteries,
even with a Fluctuating Charging Current.
Fast Charge Termination by: ∆T / ∆t , −∆V ,
0 ∆V , Safety Timer, Maximum Temperature,
Maximum Voltage.
Linearly Adjustable ∆T / ∆t Detection Slope and
Safety Timer.
Protection against Battery Voltage and Battery
Temperature Faults.
Pulsed Trickle Charge Modes.
Quick and Easy Testing for Production.
8-pin DIP or SO Packages.
Both ∆T / ∆t and −∆V detection methods have
been proved powerful in terminating fast charging
for NiMH and NiCd batteries. The AIC1784 utilizes
the combination of these two methods to achieve
reliable decision of ending fast charge and prevent
misacting caused by using −∆V detection alone
under certain conditions. Fig. 1 shows an example
of charging curve of a battery charged by a
fluctuating current from a NiMH battery charger,
which uses the AIC1784 controller IC to achieve
optimal charging. This technique, in cooperating
with the 0 ∆V detection (peak voltage timer), is
particularly suitable for NiMH batteries, whose
voltage drop is hardly significant yet temperature
rises rapidly.
APPLICATIONS
Battery Fast Chargers for:
Mobile Phones.
Notebook and Laptop Personal Computers.
Portable Power Tools and Toys.
Portable Communication Equipments.
Portable Video & Stereo Equipments.
100
Charge Current = 600 mA
Cell Capacity = 550 mA
NiMH Battery
80
1.45
Cell Voltage
60
1.35
40
1.25
Temperature (°C)
Cell Voltage (V)
1.55
Temperature
1.15
0
10
20
30
40
50
Charge Time (min.)
60
20
Fig. 1 Battery Charging Characteristics Resulting from
an
AIC1784-Controlled
Charger
The AIC1784 fast charge controller IC is designed
for intelligent charging of NiMH or NiCd batteries
without the risk of overcharge. −∆V Detection
(-0.25%), 0 ∆V detection (peak voltage timer) and
∆T / ∆t detection are the primary methods
employed by the AIC1784 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 battery itself.
with
a
The safety timer period is adjustable. Test mode is
provided for charger manufactures to dramatically
reduce production test time.
Fluctuating Charging Current
Analog Integrations Corporation
Si-Soft Research Center
DS-1784G-01
121708
3A1, No.1, Li-Hsin Rd. I , Science Park , Hsinchu 300, Taiwan , R.O.C.
TEL: 886-3-5772500
FAX: 886-3-5772510
www.analog.com.tw
1
AIC1784
TYPICAL APPLICATION CIRCUIT
D4
R11
1K
1N4148
D3
L1
220uH
R4
220K
SS32
C4
R6
+
R2 120/0.5W
1uF
D2
SS32
U1
1
2
Vin
R1
3
4
C1
DC
BOOST
DE
IS
CF
VCC
FB
GND
D1
1N4148
8
7
C5
220uF
C6
0.1uF
R5
220K
100K
+
C7
4.7uF
C9
47nF
C8
0.1uF
R8
200K
R3 0.3/1W
6
+
5
AIC1563
RT
THERMISTOR
C3
220uF
BAT1
BATTERY
Ry
R9
50K
U3
Rx
1
C10
+
0.1uF C11
100uF
C12
2
0.1uF
3
R7
5.1K
4
VCC
VTS
TMR
ADJ
VBT
MODE
ICON
GND
8
7
6
5
AIC1784
U2
78L05
1
+
VIN
C2
1uF
VOUT
GND
3
R10
2
C13
10uF
+
1K
R12
470K
LED1
Q1
MMBT2222A
Battery Charge Circuit for Fluctuating Charging Current Application
ORDERING INFORMATION
AIC1784XXXX
PIN CONFIGURATION
PACKING TYPE
TR: TAPE & REEL
TB: TUBE
PACKAGE TYPE
N: PLASTIC DIP
S: SMALL OUTLINE
TOP VIEW
VCC 1
8
VTS
2
7
ADJ
MODE 3
6
VBT
4
5
ICON
TMR
GND
C: COMMERCIAL
P: LEAD FREE COMMERCIAL
G: GREEN PACKAGE
Example: AIC1784CSTR
in SO-8 Package & Tape & Reel Packing Type
(CN is not available in TR packing type)
AIC1784PSTR
in SO-8 Lead Free Package & Tape & Reel
Packing Type
2
AIC1784
ABSOLUTE MAXIMUM RATINGS
Supply Voltage
5.5V
DC Voltage Applied on any pin
5.5V
Sink current of ICON pin
20mA
-40°C~ 85°C
Operating Temperature Range
Storage Temperature Range
-65°C~ 150°C
Junction Temperature Range
125°C
Lead Temperature (Soldering 10 sec)
260°C
Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
TEST CIRCUIT
5V
1
2
3
R2
5.1K
4
VCC
VTS
TMR
ADJ
MODE
VBT
GND
ICON
8
7
6
5
AIC1784
VBT
ADJ
VTS
R1
560
LED
VCC
3
AIC1784
ELECTRICAL CHARACTERISTICS (TA=25°C, VCC=5V, unless otherwise specified.)
(Note1)
PARAMETER
TEST CONDITIONS
SYMBOL
MIN.
TYP.
MAX.
UNIT
Supply Voltage
VCC
4.5
5.0
5.5
V
Supply Current
ICC
Battery Low
During Initial Timer
After Initial Timer
Battery High
Voltage Protection Limit
VBT
Temperature High
Temperature Sense Limit
Temperature Low
VTS
1.1
0.11
0.63
0.16
0.69
0.21
0.75
2.6
2.7
2.80
1.35
1.45
1.55
3.5
3.6
3.70
25
50
ON
Output Impedance(ICON pin)
OFF
1
VBT, VTS, ADJ pins
V
V
Ω
MΩ
kΩ
300
MODE pin
Input Impedance
mA
1
MΩ
Recommended External
RTMR
Resistor of TMR pin
Temperature detective
function is enabled.
Battery’s type is
GP180AAHC
Battery Charge Current
(Note2, Note3, Note4)
-∆V Detection
Peak Value
Level
w.r.t.
0.9
5.1
27
kΩ
0.25
0.8
1
C
-0.25
%
* w.r.t.: with respect to
Note 1: Specifications are production tested at TA=25℃. Specifications over the -40℃ to 85℃ operating
temperature range are assured by design, characterization and correlation with Statistical Quality
Controls (SQC).
Note 2: Guaranteed by battery’s specification.
Note 3: Disable the temperature detective function is not recommended. Disable the temperature detection
function may cause the detection error in some condition. (For example, battery over discharge)
Note 4: Generally the electrical current for charge or discharge is expressed in terms of a multiplier of C. For
example, if the capacity is 1800mAh, we have the following: 0.1C=0.1*1800=180mA.
4
AIC1784
TYPICAL PERFORMANCE CHARACTERISTICS
(TA=25°C, R2=5.1KΩ,
VCC=5V, refer to Test Circuit)
81.5
81.0
Safety Timer (min)
Supply Current (mA)
1.08
1.02
0.96
0.90
80.5
80.0
79.5
79.0
78.5
0.84
4.4
4.6
4.8
5.0
5.2
78.0
4.4
5.4
4.6
4.8
VCC (V)
Fig.2 Supply Current vs. Supply Voltage
5.2
5.4
5.6
Fig.3 Safety Timer vs. Supply Voltage
1.05
82
81
1.00
Safety Timer (min)
Supply Current (mA)
5.0
VCC (V)
0.95
0.90
0.85
80
79
78
77
76
0.80
0
20
40
60
80
75
Temperature (°C)
0
40
60
80
Temperature (°C)
Fig.5 Safety Timer vs. Temperature
Fig.4 Supply Current vs. Temperature
0.20
2.80
2.76
0.18
VBT (V)
VBT (V)
20
2.72
2.68
0.16
0.14
2.64
2.60
0
20
40
60
Temperature (°C)
Fig.6 VBT (High) Limit vs. Temperature
80
0.12
0
20
40
60
80
Temperature (°C)
Fig.7 VBT (Low) Limit vs. Temperature
(During Initial Timer)
5
AIC1784
33
4.0
30
3.8
VTS (V)
Output Impedance (Ω)
TYPICAL PERFORMANCE CHARACTERISTICS
27
3.6
3.4
24
21
(Continued)
3.2
0
20
40
60
0
20
Fig.9
Temperature (°C)
VTS (Low Temp) Limit vs.
Temperature
80
Temperature (°C)
Fig.8 Output Impedance vs. Temperature
(ICON Pin)
40
60
80
1.55
0.84
0.80
VBT (V)
VTS (V)
1.50
1.45
1.40
0.76
0.72
0.68
0.64
1.35
0
20
40
60
Temperature (°C)
Fig.10 VTS (High Temp) Limit vs.
Temperature
80
0
20
40
60
80
Temperature (°C)
Fig.11 VBT (Low) Limit vs. Temperature
(After Initial Timer)
6
AIC1784
BLOCK DIAGRAM
MODE
MODE
Selection
GND
VCC
Bandgap
Reference &
Voltage
Regulator
TMR
Oscillator
Charge Control
State Machine
ADJ
ICON
Charge
Control Unit
∆T/∆t Detection
Setting
Battery Temp.
Protection
13-bit
A/D
VTS
Battery
Voltage
Protection
VBT
PIN DESCRIPTIONS
PIN 1: VCC-
Power supply input at 5V±10%.
PIN2:
Determine the period of safety
timer with an external resistor
connected to GND.
TMR-
PIN 3: MODE- Determine
the
mode
operation for the AIC1784.
PIN 4: GND-
of
Power ground.
PIN 5: ICON- Open-drained output, used to
control the charging current to
the battery.
PIN 6: VBT-
Divided battery voltage input to
sense the battery voltage.
PIN 7: ADJ-
For adjusting the slope of ∆T/∆t.
Acceptable voltage range for
this pin is approximately 0.28V
to 3.8V. If voltage higher than
VCC-0.3V, the function of ∆T/∆t
detection is disabled.
PIN 8: VTS-
The battery cell temperature is
represented as a voltage input
to the AIC1784 at this pin. The
acceptable voltage range of
VTS pin is 0.29VCC to 0.72VCC.
The battery temperature is
regarded as too high if the
voltage of VTS pin is lower than
0.29VCC, and is otherwise
regarded as too low if the
voltage of VTS pin is higher
than 0.72VCC.
7
AIC1784
APPLICATION INFORMATION
THE AIC1784 OPERATION
Power-on and Battery Pre-qualifying
When power is first applied to the AIC1784, all
internal digital circuit blocks of the AIC1784 are reset
by the internal power-on-reset circuitry. The internal
control unit then examines the battery condition
through the VBT and VTS pins.
The acceptable range of VBT pin is 0.16V to 2.7V
and the acceptable temperature sense voltage
window for VTS pin is 0.29 VCC to 0.72 VCC. If the
voltage of VBT pin fails to fall within the
predetermined acceptable limits, the AIC1784
enters a charge-suspending mode, in which all the
internal circuitry remains in reset state. If the voltage
of VTS pin is outside the 0.29 VCC to 0.72 VCC
window, AIC1784 enters a charge-suspending
mode.
Fast Charge
After the battery passes fault checks, fast charging
begins while initial timer and safety timer of the
AIC1784 start counting. Functions of -∆V detection,
peak voltage timer, ∆T/∆t detection, and
maximum battery voltage are, however, disabled
temporarily until the initial timer period in the initial
stage of a charge cycle elapses. The initial timer
period is equal to 1/80 of safety timer.
Since the low limit of acceptable VBT voltage is
only about 0.16V during the initial timer period,
even deeply discharged batteries can easily qualify
to be fast charged subsequently.
In the course of fast charge, the AIC1784 constantly
monitors the voltages at VBT and VTS pins. The fast
charge process is switched to trickle charge when
any one of the following situations is encountered,
which are explained below:
Negative delta voltage (-∆V)
Peak voltage timer (0 ∆V )
Delta temperature/ delta time (∆T/∆t)
Maximum charge time
Maximum battery voltage
Maximum battery temperature
-∆V Cutoff
The AIC1784 makes a voltage sampling at VBT pin
every 4 seconds when safety timer period is set
equal to 80 minutes. If a negative delta voltage of
0.25% compared to its peak value is detected at
VBT pin, the fast charge cycle is terminated.
0∆V Cutoff
If the battery voltage stays at its peak value or
decreases very slowly for the duration, which is 6%
of safety time, the fast charge action is terminated.
∆T/∆t Cutoff
The ∆T/∆t detection of the AIC1784 is performed
by sensing the decrease of VTS pin voltage in a
specific timer interval dictated by the safety timer.
The fast charging terminates when the decrease of
VTS pin voltage in 56 seconds exceeds the
predetermined value set by ADJ pin input. This time
interval of 56 seconds is based on the assumption
that voltage of VTS pin is sampled once for every 8
seconds, which is also determined by safety timer.
Functioning of -∆V detection and peak voltage timer
(0 ∆V ) can be disabled if the MODE pin is biased to
GND. Functioning of ∆T/∆t detection can be
disabled if the voltage of ADJ pin is higher than VCC
- 0.3V.
Maximum Safety Timer Cutoff
The maximum fast charge period is determined by
the safety timer, which is set by a resistor connected
from TMR pin to GND. Safety timer, -∆V sampling
rate, and ∆T/∆t sampling rate will be longer if the
resistor value is larger. When the value of the
8
AIC1784
resistor is 5.1KΩ, the safety timer period equals 80
minutes. After the safety timer period is finished, the
fast charge action is terminated.
Trickle Charge
The trickle charge after the fast charge can prevent
the loss of charge due to battery self-discharging.
The duty cycle is set to 1/128 by internal circuitry.
Maximum Voltage and Temperature Cutoff
The AIC1784 guards against the maximum limits
for battery voltage and temperature during fast
charging. If either of these limits is exceeded, fast
charge action is terminated.
The functions and charging states control
mentioned above are illustrated in the function flow
chart of AIC1784 (Fig. 12)
Power ON
If
VBT in Normal
Range
No
Abnormal, ICON ON
Safety Timer Reset
Yes
If
VNTC<0. 72 VCC
No
Yes
If VNTC>0.29VCC
No
Abnormal, ICON ON
Safety Timer Reset
No
Yes
Yes
Battery Replacement
ICON OFF
Safety Timer Counts
∆T/∆ t Detector,
-∆ V Detector,
Peak timer are all
Disabled
If
Initial Timer
Finished
No
Yes
If
Peak Timer Period
has Finished
Yes
No
If
0.25 % Decline of VBT
is Detected
Yes
No
If ∆T/∆ t
has Reached
Battery Replacement
Yes
Fast Charge
Finished ,
Trickle charge
Starts
Yes
No
No
No
If
Safety Timer Period
has Finished
Yes
Fig. 12 Function Flow Chart of AIC1784
9
AIC1784
in parallel with the thermistor is recommended. A
typical application circuit is shown in Fig. 14.
DESIGN GUIDE
Battery Voltage Measurement
VCC
VBAT
C7
RA
C6
0.1µF
100K
+
C5
4.7µF
RB
6
0.1µF
8
VBAT
R5
1
VCC
Rx
Thermistor
The AIC1784 measures the battery voltage through
VBT pin, which is connected to battery positive
terminal through a resistor-divider network, as
shown in Fig. 13
VTS
AIC1784
Ry
4
GND
VBT
AIC1784
Fig. 13 Battery Voltage Divider
The suggested divider resistance of RA and RB for
the corresponding number of battery cells are as
below:
TABLE 1
Fig. 14 Battery Temperature Sense Circuit with
a Negative Temperature Coefficient
(NTC) Thermistor
The calculation for Rx and Ry in the circuit is as
following.
Ry//RTH
x VCC
0.29 VCC =
Rx + (Ry// RTH)
RTH= The resistance of thermistor at upper limit of
temperature protection.
Ry//R TL
0.72 VCC =
x VCC
Rx + (Ry// R TL )
BATTERY
CELLS
RA/RB
2~4
2
240
120
RTL= The resistance of thermistor at lower limit of
temperature protection.
3~6
3.3
300
91
Substitution and rearranging the equations yield
4~8
4.9
300
62
5~10
6.4
300
47
6~12
7.8
310
39
8~16
10.8
390
36
RA (KΩ)
RB (KΩ)
Battery Temperature Measurement
The AIC1784 employs a negative temperature
coefficient (NTC) thermistor to measure the
battery’s temperature. The thermistor is inherently
nonlinear with respect to temperature. To reduce
the effect of nonlinearity, a resistor-divider network
Rx= 2.061 ×
Ry =
RTL × RTH
RTL − RTH
5. 3 × RTL × RTH
RTL − 6. 3RTH
If temperature characteristic of the thermistor is like
that of SEMITEC 103AT-2, the resistance of Rx and
Ry is tabulated for different TL and TH as below.
(Note: TL is lower temperature limit and TH is upper
temperature limit.)
10
AIC1784
TABLE 2 Values of Rx and Ry at TL = 0°C
60
6.7
29.0
TH (°C)
Rx(KΩ)
Ry (KΩ)
61
6.4
27.4
50
10.1
551.1
62
6.2
26.0
51
9.7
300.7
63
6.0
24.6
52
9.4
204.8
64
5.8
23.4
53
9.0
153.9
65
5.6
22.2
54
8.7
122.8
55
8.4
101.8
56
8.1
86.5
57
7.8
75.0
58
7.5
66.0
59
7.2
58.7
60
7.0
52.8
61
6.8
47.8
62
6.5
43.6
63
6.3
39.9
64
6.1
36.8
65
5.9
34.0
66
5.7
31.6
67
5.5
29.5
68
5.3
27.5
69
5.2
25.8
70
5.0
24.3
TABLE 3 Values of Rx and Ry at TL = -10°C
TH (°C)
Rx (KΩ)
Ry (KΩ)
45
11.4
95.6
46
11.0
85.0
47
10.6
76.2
48
10.2
68.9
49
9.8
62.8
50
9.5
57.5
51
9.1
52.9
52
8.8
48.8
53
8.5
45.3
54
8.2
42.1
55
7.9
39.4
56
7.6
36.8
57
7.4
34.6
58
7.1
32.5
59
6.9
30.7
Setting the ADJ Pin Voltage
The slope of ∆T/∆t detection is determined by ADJ
pin voltage of the AIC1784.
The calculation of ADJ pin voltage is shown in the
following procedure followed by an example.
Procedure
(a) First, determine the temperature protection limits
TH and TL. Then, substitute TH & TL into the
following equation:
∆V TS
0.72 V CC − 0. 29 V CC 0. 43 V CC
=
=
∆TBASE
TH − TL
TH − TL
(b) Determine the safety timer to obtain the value of
∆tBASE .
56(sec.)
∆tBASE(sec.) =
× Safety Timer (min .)
80(min .)
(c) Determine the expected slope of ∆T / ∆t at
which temperature rises y°C in x seconds and
fast charge is subsequently cut off.
∆T y
=
∆t
x
(d) Calculate the value of VADJ
VADJ = 30 ×
∆VTS ∆T
×
× ∆tBASE
∆TBASE ∆t
Example
(a) Let TH=50°C, TL=0°C, VCC =5V. We have
∆VTS
0.43 × 5
=
= 0.043V/° C
∆TBASE
50 − 0
which means that VTS decreases 43mV as
temperature rises 1°C.
(b) If safety timer is equal to 80 minutes, ∆tBASE is
then 56 seconds.
(c) If fast charge should be terminated when
temperature rises 1°C in 60 seconds, then
11
AIC1784
1
= 0.0166
60
=30 x 0.043x 0.0166 x 56 = 1.2(V)
∆T/∆t =
If the temperature range is from 0°C to 50°C, the
voltage of VADJ under different setting conditions
should be set as tabulated below.
TABLE 4 ADJ pin Voltage (TL=0°C, TH=50°C)
∆T / ∆t
S.T.
40 min. (2C)
0.75
1.0
1.25
(°C/min.) (°C/min.) (°C/min.)
0.45
0.60
0.75
80 min. (1C)
0.90
1.20
1.50
120 min. (0.67C)
1.35
1.80
2.25
160 min. (0.5C)
1.80
2.40
3.01
200 min. (0.4C)
2.25
3.01
3.76
240 min. (0.33C)
2.70
3.61
S.T.
40 min. (2C)
100
80
60
40
20
A similar table for temperature range from 0°C to
60°C is as below.
TABLE 5 ADJ Pin Voltage (TL=0°C, TH=60°C)
∆T / ∆t
120
RTIM (Kohm)
(d) VADJ
external resistor connected from TMR pin to GND.
The relation between safety timer length and the
external resistor (RTMR) is shown in Fig. 15. The
table following shows the resistor values for some
of the commonly chosen safety timer periods.
Also shown in the table are their corresponding
oscillator frequencies.
0.75
1.0
1.25
(°C/min.) (°C/min.) (°C/min.)
0.37
0.50
0.62
80 min. (1C)
0.75
1.00
1.25
120 min. (0.67C)
1.12
1.50
1.88
160 min. (0.5C)
1.50
2.00
2.50
200 min. (0.4C)
1.88
2.50
3.13
240 min. (0.33C)
2.25
3.01
3.76
VBT Range and Temperature Protection
Acceptable VBT Range:
Before initial timer: 0.16V~2.7V
After initial timer: 0.69V~2.7V
Temperature Protection Mode:
Entering charge-suspending mode when
temperature is either too low or too high,
same as abnormal battery voltage. Latch for
charge-suspending function is provided for
high temperature protection, but not for low
temperature protection.
Setting the Period of Safety Timer
The AIC1784 provides a method for linearly
adjusting the period of safety timer with an
0
0
200
400
600
800
1000
1200
1400
Safety Timer (min.)
Fig. 15 Safety Timer vs. RTMR
TABLE 6
RTMR (KΩ)
0.9
2.2
3.5
5.1
7.8
10.9
17.5
26.2
OSC.
Freq.(KHz)
2100
1049.6
704
518.4
353.6
264
174.4
116.8
Safety timer
(min.)
20
40
60
80
120
160
240
360
Selecting Mode of Operation
The AIC1784 provides three modes of operation:
normal, test, and AC mode determined by the
setting of MODE pin according to TABLE 7. The
AIC1784 will operate normally when the MODE pin
is left floating (a 0.1µF capacitor is recommended
to be tied to MODE pin if the charge circuit works in
a noisy environment). When the MODE pin is
biased to GND, the function of -∆V detection is
disabled. When the MODE pin is biased to VCC,
12
AIC1784
the AIC1784 enters the test mode. The test mode
can be used to significantly reduce production test
time. For relevant information please contact AIC
directly.
TABLE 7
The Operating Mode of AIC1784
MODE pin
Mode
VCC
Test
Floating
Function
Safety timer period scaled
down to 1/512....etc.
Normal Normal operation
GND
AC
–∆V detection disabled
Charging Current Control
As shown in the typical application circuit, the
AIC1784 offers an open-drained output pin, ICON
pin, to control the charging current flow in fast
charge state and switch on to inhibit the charging
current flow in fault conditions. When fast charge is
completed, the AIC1784 enters the trickle charge
mode. In trickle charge mode, the ICON pin output
switches with 1/128 duty cycle. The following table
summarizes how ICON pin corresponds to various
charging states.
Power
Fast
Charge
Fault
ON
Charging Completed Conditions
ICON
ON
OFF
1/128 duty
cycle
ON
Test Mode
Fig. 16 shows the timing diagram for externally
controlled ADJ, VBT and VTS pin voltages of a
recommended AIC1784 test scheme, utilizing TEST
mode function. Output waveform of ICON of a
properly functioning AIC1784 is also shown in the
figure.
13
AIC1784
TIMING DIAGRAM
VCC, MODE=5V, RTMR=2.9kΩ
Power Init.
ON
-∆V DISABLE TEST
-∆V TEST
PEAK TIMER TEST
5V
ADJ
SAFETY TIMER TEST
∆T/∆t TEST
1.12V
3V
<2.1V
(-0.15%)
1.95V
2V
VBT
2V (-0.15%)
1.997V
1.997V
2V
1.9V
1.5V
4V
2V
2V
1.97V
1.85V
(-2.15%)
OFF
0.1
0.14 0.12
0.28
(-2.5%)
0.12
3
4
0.32
0.32
0.12
5
6
0.32
2V
2mV
Step/100mS
OFF
OFF
0.2
4V
4V
0V
ICON
TIME
2mV
Step/100mS
1.993V
(-0.35%)
4V
2V
VTS
2V
1.997V
ON
0.5
0.7
0.24
0.4
2.14
8
9
0.1
0.02
(SEC.)
STAGE
1
2
0 0.14 0.26
0.54
0.74 0.86
1.18
Fig. 16
1.5
7
1.62
1.94
2.64
3.14 3.38
3.78
10
5.92 6.02
6.04
Timing Diagram of AIC1784 in Test Mode
14
AIC1784
PHYSICAL DIMENSIONS (unit: mm)
SOP-8
D
h X 45°
E
A
H
S
Y
M
B
O
L
A
e
SEE VIEW B
SOP-8
MILLIMETERS
MIN.
MAX.
A
1.35
1.75
A1
0.10
0.25
B
0.33
0.51
C
0.19
0.25
D
4.80
5.00
E
3.80
A
e
A1
B
4.00
1.27 BSC
H
5.80
6.20
h
0.25
0.50
L
0.40
1.27
0°
8°
θ
C
WITH PLATING
0.25
BASE METAL
GAUGE PLANE
SEATING PLANE
VIEW B
θ
L
Note:
1.Refer to JEDEC MS-012AA.
2.Dimension “D” does not include mold flash, protrusions or
gate burrs. Mold flash, protrusion or gate burrs shall not
exceed 6 mil per side.
3.Dimension “E” does not include inter-lead flash or
protrusions.
4.Controlling dimension is millimeter, converted inch
dimensions are not necessarily exact.
15
AIC1784
DIP-8
E
D
eA
A
A2
eB
b
A
A
D1
b2
e
c
L
A1
WITH PLATING
BASE METAL
SECTION A-A
DIP-8
MILLIMETERS
MAX.
MIN.
5.33
A
A1
0.38
E1
GAUGE PLANE
S
Y
M
B
O
L
0.38
A2
2.92
4.95
b
0.36
0.56
b2
1.14
1.78
c
0.20
0.35
D
9.01
10.16
D1
0.13
E
7.62
8.26
E1
6.10
7.11
e
2.54 BSC
eA
7.62 BSC
eB
L
10.92
2.92
3.81
Note:
1.Refer to JEDEC MS-001BA.
2.Dimension “D” does not include mold flash, protrusions or gate burrs.
Mold flash, protrusion or gate burrs shall not exceed 10 mil per side.
3.Dimension “D1” and “E1” do not include inter-lead flash or protrusions.
4.Controlling dimension is millimeter, converted inch dimensions are not
necessarily exact.
Note:
Information provided by AIC is believed to be accurate and reliable. However, we cannot assume responsibility for use of any circuitry
other than circuitry entirely embodied in an AIC product; nor for any infringement of patents or other rights of third parties that may result
from its use. We reserve the right to change the circuitry and specifications without notice.
Life Support Policy: AIC does not authorize any AIC product for use in life support devices and/or systems. Life support devices or
systems are devices or systems which, (I) are intended for surgical implant into the body or (ii) support or sustain life, and whose failure to
perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a
significant injury to the user.
16