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參數資料
| 型號： | AAT3688IWP-4.2-T1 |
| 廠商： | Advanced Analog Technology,lnc. |
| 英文描述： | USB Port Lithium-Ion/Polymer Battery Charger |
| 中文描述： | USB接口鋰離子電池充電器 |
| 文件頁數： | 16/23頁 |
| 文件大小： | 522K |
| 代理商： | AAT3688IWP-4.2-T1 |
AAT3688
USB Port Lithium-Ion/Polymer Battery Charger
16
3688.2006.10.1.5
The LED anodes should be connected to V
USB
.
The LEDs should be biased with as little current as
necessary to create reasonable illumination; there-
fore, a ballast resistor should be placed between
each of the LED cathodes and the STAT1/2 pins.
LED current consumption will add to the over-ther-
mal power budget for the device package, hence it
is recommended to keep the LED drive current to a
minimum. 2mA should be sufficient to drive most
low-cost green, red, or multi-color LEDs. It is not
recommended to exceed 8mA for driving an indi-
vidual status LED.
The required ballast resistor value can be estimat-
ed using the following formulas:
Eq. 2:
Example:
Note: Red LED forward voltage (V
F
) is typically
2.0V @ 2mA.
Table 2 shows the four status LED display conditions.
Digital Charge Status Reporting
The AAT3688 has a comprehensive digital data
reporting system by use of the DATA pin feature.
This function can provide detailed information
regarding the state of the charging system. The
DATA pin is a bi-directional port which will read
back a series of data pulses when the system
microcontroller asserts a request pulse. This sin-
gle strobe request protocol will invoke one of 14
possible return pulse counts in which the micro-
controller can look up based on the serial report
shown in Table 3.
The DATApin function is active low and should nor-
mally be pulled high to V
USB
. This data line may
also be pulled high to the same level as the high
state for the logic I/O port on the system microcon-
troller. In order for the DATA pin control circuit to
generate clean sharp edges for the data output and
to maintain the integrity of the data timing for the
system, the pull-up resistor on the data line should
be low enough in value so that the DATA signal
returns to the high state without delay. If the value
of the pull-up resistor used is too high, the strobe
pulse from the system microcontroller may exceed
the maximum pulse time and the DATA output con-
trol could issue false status reports. A 1.5k
Ω
resis-
tor is recommended when pulling the DATA pin
high to 5.0V at the V
USB
input. If the data line is
pulled high to a voltage level less than 5.0V, the
pull-up resistor may be calculated based on a rec-
ommended minimum pull-up current of 3mA. Use
the following formula:
Eq. 3:
V
PULL-UP
3mA
R
PULL-UP
≤
(5.0V
- 2.0
V)
2mA
R
B(STAT1)
=
= 1.5k
Ω
(V
USB
-
V
F(LED)
)
I
LED(STAT1/2)
R
B(STAT1/2)
=
相關PDF資料 |
PDF描述 |
|---|---|
| AAT3689 | 0.5A/1.0A USB Port/Adapter Lithium-Ion/Polymer Battery Charger |
| AAT3689IWP-4.2-T1 | 0.5A/1.0A USB Port/Adapter Lithium-Ion/Polymer Battery Charger |
| AAT3690 | 1.0A USB Port/Adapter Lithium-Ion/Polymer Battery Charger |
| AAT3690IWP-4.2-T1 | 1.0A USB Port/Adapter Lithium-Ion/Polymer Battery Charger |
| AAT3697 | 2A Lithium-Ion/Polymer Battery Charger |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AAT3690IWP-4.2-T1 | 制造商:Advanced Analogic Tech 功能描述:AAT3690 Series 4 - 5.5 V 1A USB Port/Adapter Lithium-Ion/Polymer Battery Charger 制造商:SKYWORKS SOLUTIONS 功能描述:AAT3690 Series 4 - 5.5 V 1A USB Port/Adapter Lithium-Ion/Polymer Battery Charger 制造商:Skyworks Solutions Inc 功能描述:POWER MANAGEMENT IC |
| AAT3691IRN-4.2-T1 | 制造商:SKYWORKS SOLUTIONS 功能描述:AAT3691 Series 1.6 A 28 V Dual Input 1.6 A Linear Charger - TDFN-16 |
| AAT3692IRN-4.2-T1 | 功能描述:電池管理 2 Input 1.6A Linear Chrg w/28V OVP RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| aat3693idh-aa-db1 | 制造商:Skyworks Solutions Inc 功能描述:AAT3693 Series 1.6 A Lithium-Ion/Polymer Battery Charger Eval Board |
| AAT3693IDH-AA-T1 | 功能描述:電池管理 Lithium-Ion/Polymer Batt Charger 1.6A RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
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