Datasheet > AAT3680

AAT3680

更新时间： 2022-12-26 18:52:05

品牌	Logo	应用领域
AAT		电池控制器
页数	文件大小	规格书
18页	213K
描述
Lithium-Ion/Polymer Linear Battery Charge Controller

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AAT3680 数据手册

AAT3680

Lithium-Ion/Polymer

Linear Battery Charge Controller

LED Display

Charge Status

Sleep / Charge Complete

Temp., OC, OV Fault

Battery Conditioning

Output Status

off / off / off / off

on / on / off / off

on / on / on / on

on / on / on / off

on / off / off / off

on/off

OFF

Constant Current Mode

Constant Voltage Mode

OFF

Figure 2: LED Display Output.

An additional feature is the Output Status for

Battery Not Detected state. When the AAT3680

senses there is no battery connected to the BAT

pin, the STAT pin cycles for two periods, then

remains off for two periods.

High-Speed Data Reporting

A high-speed data reporting application schematic

is shown in Figure 3. An optional system micro-

controller interface can be enabled by pulling up

the T2X pin to 4.5V to 5.5V during the power-up

sequence. The T2X pin should be pulled high with

the use of a 100kΩ resistor. If the input supply to

VP will not exceed 5.5V, then the T2X pin may be

tied directly to VP through a 100kΩ resistor. Since

this is a TTL-level circuit, it may not be pulled high-

er than 5.5V without risk of damage to the device.

When in high-speed data reporting, the AAT3680

will only trickle charge at the 2X trickle charge

level. This is because the TX2 pin is pulled high to

enable the high-speed data reporting.

A status display LED may not be connected to the

STAT pin when the high-speed data reporting is

being utilized. If both display modes are required,

the display LED must be switched out of the circuit

before the T2X pin is pulled high. Failing to do so

could cause problems with the high-speed switching

control circuits internal to the AAT3680.

When the high-speed data report feature is

enabled, the STAT output periods are sped up to

40µs, making the total status word 160µs in length

(see Figure 4).

SENSE

0.2

FZT788B

BATT+

10µF

2.5k

BATT-

DRV

CSI

TX2

BAT

100k

RT1

AAT3680

TEMP

4.7µF

100k

VSS

STAT

Battery

Pack

0.1µF

RT2

STAT

Figure 3: High-Speed Data Reporting Application Schematic.

3680.2006.03.1.6

1...5 6 789 10 11...18

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