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AIC1784
Battery Charge Controller
FEATURES
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.
DESCRIPTION
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. 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. The safety timer period is adjustable. Test mode is provided for charger manufactures to dramatically reduce production test time.
APPLICATIONS
Battery Fast Chargers for: Mobile Phones. Notebook and Laptop Personal Computers. Portable Power Tools and Toys. Portable Communication Equipments. Portable Video & Stereo Equipments.
1.55 100
Charge Current = 600 mA Cell Capacity = 550 mA NiMH Battery
Cell Voltage
1.35
60
1.25
40
Temperature
1.15 0 10 20 30 40 50 60 20
Charge Time (min.)
Fig. 1 Battery Charging Characteristics Resulting from an AIC1784-Controlled Charger with a Fluctuating Charging Current
Analog Integrations Corporation
Si-Soft Research Center 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
Temperature (C)
Cell Voltage (V)
1.45
80
DS-1784G-01
121708
1
AIC1784
TYPICAL APPLICATION CIRCUIT
R11 1K
D4 1N4148
L1 220uH
D3
SS32
C4
R4 220K
+
1uF
U1
1 DC
R6
C5 220uF
R2 120/0.5W
BOOST
IS
VCC
FB
8
7
6
5
2
D1 1N4148
D2 SS32
C6 0.1uF
R5 220K
+ C7 4.7uF
100K
C8 0.1uF
C9 47nF
Vin
DE
R1
3
R3 0.3/1W
R8 200K
RT THERMISTOR
BAT1 BATTERY
CF
4
C1
GND
+
AIC1563
C3 220uF
Rx
U3
1 VCC
VTS
ADJ
VBT
ICON
8
7
6
5
R9 50K
Ry
C10 + 0.1uF C11 100uF
C12 0.1uF
2
TMR
3
MODE
R7 5.1K
U2 78L05
1 VIN
VOUT GND 3
4
GND
AIC1784
+
C2 1uF
2
R10
C13 10uF
+
1K
LED1
Q1 MMBT2222A
R12 470K
Battery Charge Circuit for Fluctuating Charging Current Application
ORDERING INFORMATION
AIC1784XXXX
PACKING TYPE TR: TAPE & REEL TB: TUBE PACKAGE TYPE N: PLASTIC DIP S: SMALL OUTLINE C: COMMERCIAL P: LEAD FREE COMMERCIAL G: GREEN PACKAGE
PIN CONFIGURATION
TOP VIEW
VCC 1 TMR
2
8 7 6
VTS ADJ VBT ICON
MODE 3 GND
4
5
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 DC Voltage Applied on any pin Sink current of ICON pin Operating Temperature Range Storage Temperature Range Junction Temperature Range Lead Temperature (Soldering 10 sec) 5.5V 5.5V 20mA -40C~ 85C -65C~ 150C 125C 260C
Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
TEST CIRCUIT
5V
1 2 3 VCC TMR MODE GND VTS ADJ VBT ICON 8 7 6 5
R2 5.1K
4
AIC1784
VBT R1 560 ADJ VTS
LED
VCC
3
AIC1784
ELECTRICAL CHARACTERISTICS (TA=25C, VCC=5V, unless otherwise specified.)
(Note1) PARAMETER Supply Voltage Supply Current Battery Low During Initial Timer After Initial Timer Battery High Temperature High Temperature Sense Limit Temperature Low ON Output Impedance(ICON pin) OFF 1 VTS TEST CONDITIONS SYMBOL VCC ICC MIN. 4.5 TYP. 5.0 1.1 MAX. 5.5 UNIT V mA
Voltage Protection Limit
VBT
0.11 0.63 2.6 1.35 3.5
0.16 0.69 2.7 1.45 3.6 25
0.21 0.75 2.80 1.55 3.70 50
V
V M k M
Input Impedance Recommended External Resistor of TMR pin Battery Charge Current (Note2, Note3, Note4)
MODE pin VBT, VTS, ADJ pins RTMR Temperature detective function is enabled. Battery's type is GP180AAHC w.r.t. 1 0.9
300
5.1
27
k
0.25
0.8
1
C
-V Detection Peak Value
Level
-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
VCC=5V, refer to Test Circuit)
1.08 81.5 81.0 1.02
(TA=25C, R2=5.1K,
Supply Current (mA)
Safety Timer (min)
4.6 4.8 5.0 5.2 5.4
80.5 80.0 79.5 79.0 78.5
0.96
0.90
0.84 4.4
78.0 4.4
4.6
4.8
5.0
5.2
5.4
5.6
VCC (V) Fig.2 Supply Current vs. Supply Voltage
1.05
VCC (V) Fig.3 Safety Timer vs. Supply Voltage
82 81
Supply Current (mA)
Safety Timer (min)
20 40 60 80
1.00
80 79 78 77 76
0.95
0.90
0.85
0.80 0
75
Temperature (C) Fig.4 Supply Current vs. Temperature
2.80
0
20
40
60
80
Temperature (C) Fig.5 Safety Timer vs. Temperature
0.20
2.76
0.18
VBT (V)
2.72
VBT (V)
0.16
2.68
0.14 2.64
2.60
0
20
40
60
80
0.12
0
20
40
60
80
Temperature (C) Fig.6 VBT (High) Limit vs. Temperature
Temperature (C) Fig.7 VBT (Low) Limit vs. Temperature (During Initial Timer)
5
AIC1784
TYPICAL PERFORMANCE CHARACTERISTICS
33 4.0
(Continued)
Output Impedance ()
30
3.8
VTS (V)
27
3.6
24
3.4
21
3.2 0 20 40 60 80
0
20
40
60
80
Temperature (C) Fig.8 Output Impedance vs. Temperature (ICON Pin)
1.55
0.84
Fig.9
Temperature (C) VTS (Low Temp) Limit vs. Temperature
1.50
0.80
VTS (V)
VBT (V)
0.76
1.45
0.72
1.40
0.68
0.64
1.35
0
20
40
60
80
0
20
40
60
80
Temperature (C) Fig.10 VTS (High Temp) Limit vs. Temperature
Temperature (C) Fig.11 VBT (Low) Limit vs. Temperature (After Initial Timer)
6
AIC1784
BLOCK DIAGRAM
MODE GND VCC TMR
MODE Selection
Bandgap Reference & Voltage Regulator
Oscillator
Charge Control State Machine
T/t Detection Setting Battery Voltage Protection
ICON
Charge Control Unit
ADJ
Battery Temp. Protection
13-bit A/D
VTS
VBT
PIN DESCRIPTIONS
PIN 1: VCCPIN2: TMRPower supply input at 5V10%. Determine the period of safety timer with an external resistor connected to GND. of 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: VTSThe 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.
PIN 3: MODE- Determine the mode operation for the AIC1784. PIN 4: GNDPower ground.
PIN 5: ICON- Open-drained output, used to control the charging current to the battery. PIN 6: VBTPIN 7: ADJDivided battery voltage input to sense the battery voltage. For adjusting the slope of T/t. Acceptable voltage range for
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. 0V 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 5.1K, the safety timer period equals 80 minutes. After the safety timer period is finished, the fast charge action is terminated. 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.
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. 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 Yes If VNTC<0. 72 VCC
No
Abnormal, ICON ON Safety Timer Reset
No
Yes
If VNTC >0.29VCC
No
Abnormal, ICON ON Safety Timer Reset
No Yes Battery Replacement ICON OFF Safety Timer Counts Yes
T/ t Detector , - V Detector , Peak timer are all Disabled
If Initial Timer Finished No Yes If Peak Timer Period has Finished No If 0.25 % Decline of VBT is Detected No
Yes
Yes Fast Charge Finished , Trickle charge Starts Yes
Battery Replacement
Yes
If T/ t has Reached
No
No If Safety Timer Period has Finished
No
Yes
Fig. 12 Function Flow Chart of AIC1784
9
AIC1784
DESIGN GUIDE Battery Voltage Measurement 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
VBAT RA R5 + C5 100K 4.7F C6 0.1F 6 VBT AIC1784
in parallel with the thermistor is recommended. A typical application circuit is shown in Fig. 14.
VCC VBAT Rx 8 Thermistor C7 0.1F 1 VCC VTS
AIC1784
Ry 4 GND
RB
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 )
RTL= The resistance of thermistor at lower limit of temperature protection. Substitution and rearranging the equations yield Rx= 2.061 x Ry =
RTL x RTH RTL - RTH 5. 3 x RTL x RTH RTL - 6. 3RTH
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 BATTERY CELLS 2~4 3~6 4~8 5~10 6~12 8~16 RA/RB 2 3.3 4.9 6.4 7.8 10.8 RA (K) 240 300 300 300 310 390 RB (K) 120 91 62 47 39 36
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
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 = 0C TH (C) 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 Rx(K) 10.1 9.7 9.4 9.0 8.7 8.4 8.1 7.8 7.5 7.2 7.0 6.8 6.5 6.3 6.1 5.9 5.7 5.5 5.3 5.2 5.0 Ry (K) 551.1 300.7 204.8 153.9 122.8 101.8 86.5 75.0 66.0 58.7 52.8 47.8 43.6 39.9 36.8 34.0 31.6 29.5 27.5 25.8 24.3
60 61 62 63 64 65
6.7 6.4 6.2 6.0 5.8 5.6
29.0 27.4 26.0 24.6 23.4 22.2
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.) = x Safety Timer (min .) 80(min .) (c) Determine the expected slope of T / t at which temperature rises yC in x seconds and fast charge is subsequently cut off. T y = t x (d) Calculate the value of VADJ
TABLE 3 Values of Rx and Ry at TL = -10C TH (C) 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 Rx (K) 11.4 11.0 10.6 10.2 9.8 9.5 9.1 8.8 8.5 8.2 7.9 7.6 7.4 7.1 6.9 Ry (K) 95.6 85.0 76.2 68.9 62.8 57.5 52.9 48.8 45.3 42.1 39.4 36.8 34.6 32.5 30.7
VADJ = 30 x
VTS T x x tBASE TBASE t
Example
(a) Let TH=50C, TL=0C, VCC =5V. We have VTS 0.43 x 5 = = 0.043V/ C TBASE 50 - 0 which means that VTS decreases 43mV as temperature rises 1C. (b) If safety timer is equal to 80 minutes, tBASE is then 56 seconds. (c) If fast charge should be terminated when temperature rises 1C in 60 seconds, then
11
AIC1784
T/t =
(d) VADJ
1 = 0.0166 60 =30 x 0.043x 0.0166 x 56 = 1.2(V)
If the temperature range is from 0C to 50C, the voltage of VADJ under different setting conditions should be set as tabulated below. TABLE 4 ADJ pin Voltage (TL=0C, TH=50C) T / t S.T. 40 min. (2C) 80 min. (1C) 120 min. (0.67C) 160 min. (0.5C) 200 min. (0.4C) 240 min. (0.33C) 0.75 1.0 1.25 (C/min.) (C/min.) (C/min.) 0.45 0.60 0.75 0.90 1.35 1.80 2.25 2.70 1.20 1.80 2.40 3.01 3.61 1.50 2.25 3.01 3.76
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.
120
100
80
RTIM (Kohm)
60
40
20
A similar table for temperature range from 0C to 60C is as below. TABLE 5 ADJ Pin Voltage (TL=0C, TH=60C) T / t S.T. 40 min. (2C) 80 min. (1C) 120 min. (0.67C) 160 min. (0.5C) 200 min. (0.4C) 240 min. (0.33C) 0.75 1.0 1.25 (C/min.) (C/min.) (C/min.) 0.37 0.50 0.62 0.75 1.12 1.50 1.88 2.25 1.00 1.50 2.00 2.50 3.01 1.25 1.88 2.50 3.13 3.76
0 0 200 400 600 800 1000 1200 1400
Safety Timer (min.)
Fig. 15 Safety Timer vs. RTMR TABLE 6 RTMR (K) 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
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
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 0.1F 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 MODE pin VCC Floating GND The Operating Mode of AIC1784 Mode Test Function Safety timer period scaled down to 1/512....etc. V detection disabled
Normal Normal operation AC
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=2.9k
Power Init. ON PEAK TIMER TEST
-V TEST
-V DISABLE TEST
T/t TEST
SAFETY TIMER TEST
ADJ 3V
5V
1.12V <2.1V
(-0.15%) 2V 1.95V 1.997V 2V (-0.15%) 1.997V 1.993V (-0.35%) 4V 2V 1.97V (-2.15%) 2V 1.997V 1.9V 2V 2mV Step/100mS
VBT
1.5V 2V VTS 0V
4V
4V 2V 1.85V (-2.5%) 2mV Step/100mS
4V 2V
ICON
OFF
OFF
OFF ON
TIME
(SEC.)
0.1
0.14 0.12 1 2
0.28
0.2 3
0.12 4
0.32
0.32 5
0.12 6
0.32
0.7
0.5 7
0.24
0.4 8
2.14 9
0.1
0.02 10
STAGE
0 0.14 0.26
0.54
0.74 0.86
1.18
1.5
1.62
1.94
2.64
3.14 3.38
3.78
5.92 6.02
6.04
Fig. 16
Timing Diagram of AIC1784 in Test Mode
14
AIC1784
PHYSICAL DIMENSIONS (unit: mm)
SOP-8
D
S Y M B O L
SOP-8 MILLIMETERS MIN. 1.35 0.10 0.33 0.19 4.80 3.80 1.27 BSC 5.80 0.25 0.40 0 6.20 0.50 1.27 8 MAX. 1.75 0.25 0.51 0.25 5.00 4.00
H
E
A A1 B C
h X 45
D
SEE VIEW B
A
A
e
E e H h L
A
B A1
WITH PLATING
C
BASE METAL
0.25
GAUGE PLANE SEATING PLANE
L
VIEW B
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
D
E
GAUGE PLANE
S Y M B O L
DIP-8 MILLIMETERS MIN. MAX. 5.33 0.38 2.92 0.36 1.14 0.20 9.01 0.13 7.62 6.10 2.54 BSC 7.62 BSC 10.92 2.92 3.81 8.26 7.11 4.95 0.56 1.78 0.35 10.16
E1
A A1 A2 b
0.38
eA eB A2 A
b2 c D D1 E
WITH PLATING
E1 e
A1
L
A
A
BASE METAL SECTION A-A
eA eB L
D1 b2 e
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.
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