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參數(shù)資料
| 型號： | AIC1781 |
| 廠商： | Analog Integrations Corporation |
| 英文描述： | Dual Line Receiver 8-SOIC 0 to 70 |
| 中文描述： | 電池充電控制器 |
| 文件頁數(shù)： | 15/17頁 |
| 文件大小： | 423K |
| 代理商： | AIC1781 |
AIC1781
15
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,
the AIC1781 enters the test mode. The test mode
can be used to significantly reduce production test
time. For relevant informations please contact AIC
directly.
TABLE. 5 The Operating Mode of AIC1781
MODE pin
VCC
Mode
Test
Function
Safety timer period scaled
down to 1/32....etc.
Normal Normal operation
AC
–
V detection disabled
Floating
GND
The Mode of LED Display and Trickle Charge
The AIC1781 provides two LED display modes
and five-pulsed trickle charge modes. The tri-level
inputs, SEL1 and SEL2 pins, as in the TABLE 6
determine the modes of LED display and trickle
charge.
TABLE. 6 Mode of LED Display and Trickle
Charge
SEL1
SEL2
Trickle Charge
Duty
N/A
1/32
1/64
1/128
1/256
N/A
1/32
1/64
1/128
LED Display
Mode
Type 1
Type 1
Type 1
Type 1
Type 1
Type 2
Type 2
Type 2
Type 2
V
CC
V
CC
Floating
GND
V
CC
Floating
GND
V
CC
Floating
GND
Floating
GND
Display the Battery Charging Status
The AIC1781 provides two open-drained outputs,
LED1 and LED2, to indicate the battery charging
status. Refer to the table of LED display mode
(TABLE 6), depending on the setting of SEL1 and
SEL2 pins, the outputs of LED1 and LED2 pins
are shown in the following table:
TYPE 1
Power
ON
Fast
Charging
Charge
Completed
Fault
Conditions
LED1
1Hz
ON
OFF
OFF
LED2
OFF
OFF
ON
OFF
TYPE 2
Power
ON
Fast
Charging
Charge
Completed
Fault
Conditions
LED1
1Hz
ON
OFF
4Hz
Flashing
LED2
1Hz
4Hz
Flashing
ON
OFF
Charging Current Control
As shown in the typical application circuit, the
AIC1781 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 AIC1781 enters the trickle charge
mode. In trickle charge mode, the ICON pin output
switches with predetermined duty cycle. Refer to
the table of trickle charge mode (TABLE 6), the duty
cycle is determined by the setting of SEL1 and
SEL2 pins. The following table summarizes how
ICON pin corresponds to various charging states.
Power
ON
Charging
Fast
Charge
Completed
Fault
Conditions
ICON
ON
OFF
See pin 10
& 11
ON
Test Mode
Fig. 6 shows the timing diagram for externally
controlled PEAK, ADJ, VBT, VTS, SEL1 and
SEL2 pin voltages of a recommended AIC1781
test scheme, utilizing TEST mode function.
Output waveforms of LED1, LED2 and ICON of a
properly functioning AIC1781 are also shown in
the figure.
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