Datasheet > ADP3801AR

ADP3801AR

更新时间： 2024-02-04 12:31:31

品牌	Logo	应用领域
亚德诺 - ADI		电池开关
页数	文件大小	规格书
20页	258K
描述
High Frequency Switch Mode Dual Li-Ion Battery Chargers

阅读下载

中文翻译

获取价格

技术参数
数据手册

如果您发现信息不准确，欢迎纠错

ADP3801AR 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Active	零件包装代码：	SOIC
包装说明：	SOP,	针数：	16
Reach Compliance Code：	unknown	风险等级：	5.72
模拟集成电路 - 其他类型：	BATTERY CHARGE CONTROLLER	控制模式：	CURRENT/VOLTAGE-MODE
控制技术：	PULSE WIDTH MODULATION	最大输入电压：	20 V
最小输入电压：	4.1 V	标称输入电压：	10 V
JESD-30 代码：	R-PDSO-G16	JESD-609代码：	e0
长度：	9.9 mm	湿度敏感等级：	NOT SPECIFIED
功能数量：	1	端子数量：	16
最高工作温度：	85 °C	最低工作温度：	-40 °C
标称输出电压：	3.3 V	封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	峰值回流温度（摄氏度）：	220
认证状态：	COMMERCIAL	座面最大高度：	1.75 mm
表面贴装：	YES	切换器配置：	SINGLE
最大切换频率：	250 kHz	温度等级：	INDUSTRIAL
端子面层：	TIN LEAD	端子形式：	GULL WING
端子节距：	1.27 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	30	宽度：	3.9 mm
Base Number Matches：	1

ADP3801AR 数据手册

ADP3801/ADP3802

Adjusting the Final Battery Voltage

The same care must be given to the ground connection for the

ADP3801/ADP3802. Any voltage difference between the bat-

tery ground and the GND pin will cause an error in the charge

voltage. This error includes the voltage drop due to the ground

current of the part. Thus, the GND pin should have a thick

trace or ground plane connected as close as possible to the

battery’s negative terminal. Any current from additional cir-

cuitry should be routed separately to the supply return and not

share a trace with the GND pin.

In addition to the PROG input, the ADP3801/ADP3802 pro-

vides an input (ADJ) for fine adjustment of the final battery

voltage. For example, the ADJ amplifier allows the nominal

4.2 V per cell setting for Li-Ion battery cells to be adjusted to

4.1 V for certain chemistries. An internal amplifier buffers the

ADJ pin and adjusts the internal reference voltage on the input

to GM3. Figure 5 shows a graph of the percent change in final

battery voltage vs. the ADJ voltage. The linear portion between

0.6 V_REFand 1.4 V_REFfollows the formula below:

Dual Battery Operation

The ADP3801/ADP3802 is designed to charge two separate

battery packs. These batteries can be of different chemistries

and have a different number of cells. At any given time, only

one of the two batteries is being charged. To select which bat-

tery is being monitored, and therefore which battery is being

charged, the ADP3801/ADP3802 includes a battery selector

mux. This two-channel mux is designed to be “break-before-

make” to ensure that the two batteries are not shorted together

momentarily when switching from one to the other. The A/B

input is a standard logic input, with a logic low selecting BATA

and a logic high selecting BATB. See the application in Figure

31 for more information.

−V_REF

ADJ

∆V_BAT% =

×100

( )

4V_REF

The factor of four in the denominator is due to internal scaling.

When V_ADJis above 2.5 V, an internal comparator switches off

the ADJ amplifier, giving a 0% change in V_BAT. Whenever the

ADJ function is not used it should be connected to VL.

The total range of adjustment is ±10%. For example, the 4.2 V

final battery voltage setting can be adjusted from 3.78 V to

4.62 V. Of course, care must be taken not to adjust the final

battery voltage to an unsafe charging level for Li-Ion batteries.

Follow the battery manufacturers specifications for the appro-

priate final battery voltage. Never charge a Li-Ion battery above

the manufacturers rated maximum!

Overvoltage Comparator

GM3 includes an overvoltage comparator. Its output bypasses

the COMP node to quickly reduce the duty cycle of the PWM

to 0% when an overvoltage event occurs. A second output is

connected to the COMP node and, with slower response, re-

duces the voltage on the COMP cap to provide a soft start re-

covery. The threshold of the comparator is typically 8% above

the final battery voltage. This comparator protects external

circuitry from any condition that causes the output voltage to

quickly increase. The most likely reason is if the battery is

suddenly removed while it is being charged with high current.

Figure 27 shows the transient response when the battery is

removed. Notice that the output voltage increases to the com-

parator trip point, but it is quickly brought under control and

held at the final battery voltage.

Voltage Loop Accuracy

The ADP3801/ADP3802 guarantees that the battery voltage be

within ±0.75% of the setpoint over the specified temperature

range and the specified charge current range. This inclusive

specification saves the designer the time and expense of having

to design-in additional high accuracy components such as a

reference and precision resistors.

To maintain the ±0.75% specification, the layout and design of

the external circuitry must be considered. The input impedance

of BATA and BATB is typically 265 kΩ, so any additional im-

pedance on these inputs will cause an error. As a result, do not

add external resistors to the battery inputs. Furthermore, if the

output voltage is being used for other purposes, such as to sup-

ply additional circuitry, the current to this circuitry should be

routed separately from the sense lines to prevent voltage drops

due to impedance of the PC-board traces. In general, route the

sense lines as Kelvin connections as close to the positive termi-

nals of the battery as possible.

REV. 0

–9–

1...6 7 8910 11 12...20

中文翻译

下载PDF

与ADP3801AR相关器件

型号	品牌	获取价格	描述	数据表
ADP3801AR-REEL	ROCHESTER	获取价格	BATTERY CHARGE CONTROLLER, 250 kHz SWITCHING FREQ-MAX, PDSO16, SOIC-16
ADP3802	ADI	获取价格	High Frequency Switch Mode Dual Li-Ion Battery Chargers
ADP3802_15	ADI	获取价格	High Frequency Switch Mode Dual Li-Ion Battery Chargers
ADP3802AR	ADI	获取价格	High Frequency Switch Mode Dual Li-Ion Battery Chargers
ADP3802AR	ROCHESTER	获取价格	2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16, SOIC-16
ADP3804	ADI	获取价格	High Frequency Switch Mode Li-Ion Battery Charger
ADP3804JRU	ADI	获取价格	High Frequency Switch Mode Li-Ion Battery Charger
ADP3804JRU-12.5-R7	ADI	获取价格	IC BATTERY CHARGE CONTROLLER, PDSO24, TSSOP-24, Switching Regulator or Controller
ADP3804JRU-12.5-RL	ADI	获取价格	IC BATTERY CHARGE CONTROLLER, PDSO24, TSSOP-24, Switching Regulator or Controller
ADP3804JRU-125	ADI	获取价格	High Frequency Switch Mode Li-Ion Battery Charger

与ADP3801AR相关文章

压敏电阻器在直流电路中的过压保护应用探讨
2024-06-07

2
电感耐压值及其与电感大小的关系
2024-06-07

5
CNY17F光耦合器：特性、应用、封装、引脚功能及替换型号解析
2024-06-07

4
DS1307资料解析：特性、引脚说明、替代推荐
2024-06-07

3

产品中心

服务支持

精选活动

关于我们

帮助中心

ADP3801AR

ADP3801AR 技术参数

ADP3801AR 数据手册

与ADP3801AR相关器件

与ADP3801AR相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

ADP3801AR

ADP3801AR 技术参数

ADP3801AR 数据手册

与ADP3801AR相关器件

与ADP3801AR相关文章

您还可以找

您在本页遇到什么问题？