AIC1782 查看數據表（PDF） - Analog Intergrations

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AIC1782

Dual-Battery Charge Controller

Analog Intergrations 

800

600

400

200

0

0

100

200

300

400

500

Safety Timer (min.)

Fig. 4 Safety Timer vs RTMR

RTMR

(KΩ)

11

23

48

74

100

152

206

314

491

667

Osc.Freq.

(KHz)

262.4

131.2

65.6

43.7

32.8

21.9

16.4

10.9

7.3

5.5

Safety timer

(min.)

10

20

40

60

80

120

160

240

360

480

Selecting Mode of Operation

The AIC1782 provides three modes of opera-

tion: normal, test, and AC mode, determined by

the setting of MODE pin according to TABLE 5.

The AIC1782 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, the AIC1782

enters the test mode. The test mode can be

used to significantly reduce production test time.

For relevant informations please contact AIC di-

rectly.

AIC1782

ABLE. 5 The Operating Mode of AIC1782

MODE pin Mode Function

VCC

Test Safety timer period

scaled down to 1/32....

etc.

Floating Normal Normal operation

GND

AC

–∆V detection disabled

The Mode of LED Display and Trickle Charge

The AIC1782 provides two LED display modes

and five pulsed trickle charge modes. The

modes of LED display and trickle charge are

determined by the tri-level inputs, SEL1 and

SEL2 pins, as in the TABLE 6.

TABLE. 6 Mode of LED Display and Trickle

Charge

SEL1 SEL2

Trickle

Charge

Duty

LED

Display

Mode

VCC

N/A

VCC

Floating

1/32

GND

1/64

Type 1

Type 1

Type 1

VCC

Floating Floating

1/128

1/256

Type 1

Type 1

GND

N/A

Type 2

GND

VCC

Floating

1/32

1/64

Type 2

Type 2

GND

1/128

Type 2

Displaying the Battery Charging Status

The AIC1782 provides four open-drained outputs,

in which LEA1 and LEA2 are used to indicate the

battery charging status of pack A, yet LEB1 and

LEB2 are used to indicate battery charging status

of pack B. Refer to the table of LED display mode

(TABLE 6), depending on the setting of SEL1 and

SEL2 pins, the outputs of LEA1, LEA2, LEB1, and

LEB2 pins are shown in the following table:

19

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