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BQ24800

更新时间： 2024-11-30 11:12:43
品牌 Logo 应用领域
德州仪器 - TI 电池控制器
页数 文件大小 规格书
11页 410K
描述
支持混合动力升压和电池升压模式的 SMBus 1 至 4 节降压电池充电控制器

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中文翻译

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BQ24800 数据手册

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BQ24800  
SLUSE37 –MARCH 2020  
BQ24800 SMBus 1- to 4-Cell Buck Battery Charge Controller  
With Peak Power, Hybrid Power Boost and Battery Only Boost Modes  
1 Features  
2 Applications  
1
•
Hybrid Power Boost Mode to power up system  
from adapter and battery together  
•
•
•
•
Notebook, ultrabook, detachable, and tablet PC  
Industrial and medical equipment  
System with battery backup  
–
Ultra-fast transient response of 150 µs to enter  
Hybrid Power Boost Mode  
Portable equipment  
•
•
Battery Only Boost Mode to extend battery run  
time  
3 Description  
The BQ24800 device is  
synchronous buck battery charger, offering low  
component count for space-constrained, multi-  
chemistry battery charging applications.  
Peak power two-level input current limit to  
maximize the power from adapter and minimize  
battery discharge  
a
high-efficiency,  
•
•
Charge 1- to 4-cell battery pack from 4.5- to 24-V  
adapter  
The BQ24800 device supports hybrid power boost  
mode. Hybrid power boost mode boosts the battery  
up to the system voltage in order to supplement the  
adapter when system power demand is temporarily  
higher than the adapter is able to provide. The ultra-  
fast transition from battery charging to battery  
discharging prevents adapter crash from overloading  
condition.  
High accuracy power and current monitoring for  
CPU throttling  
–
–
–
Comprehensive PROCHOT profile  
± 2% Current monitor accuracy  
± 5% System Power Monitor Accuracy  
(PMON)  
The BQ24800 device also supports battery only boost  
mode when no adapter is present. When the battery  
voltage is above the minimum system operation  
voltage, the battery is directly connected to the  
system supply rail through BATFET. Once the battery  
voltage goes below the minimum system operation  
voltage, BQ24800 will turn on the boost mode to  
regulate the system supply rail, extending the system  
run time.  
•
•
Automatic NMOS power source selection from  
adapter or battery  
–
ACFET Fast turn on in 100 µs when exiting  
learn mode from battery removal  
Programmable input current, charge voltage,  
charge and discharge current limit  
–
–
–
–
±0.4% Charge voltage (16-mV/step)  
±2% Input current (64-mA/step)  
Device Information(1)  
±2% Charge current (64-mA/step)  
±2% Discharge current (512-mA/step)  
PART NUMBER  
PACKAGE  
BODY SIZE (NOM)  
BQ24800  
WQFN (28)  
4.00 mm × 4.00 mm  
•
High integration  
–
–
–
–
–
Battery LEARN function  
Battery present monitor  
Boost Mode indicator  
Loop compensation  
BTST Diode  
(1) For all available packages, see the orderable addendum at  
the end of the data sheet.  
Adapter  
4.5 œ 24 V  
Enhanced Safety:  
OCP, OVP, FET Short  
System  
RAC  
NFET  
Driver  
NFET Driver  
•
Enhanced safety features for over-voltage  
protection, over-current protection, battery,  
inductor, and MOSFET short-circuit protection  
Adapter Detection  
Battery  
Pack  
1S-4S  
BQ24800  
RSR  
•
•
•
Switching frequency: 300 kHz, 400 kHz, 600 kHz,  
and 800 kHz  
Hybrid Power Boost Charge  
Controller with Peak Power  
Mode and Battery Only  
Boost Mode  
SMBUS  
Host  
Realtime system control on ILIM pin to limit  
charge and discharge current  
IADPT, PROCHOT,  
IDCHG, PMON  
Integration:  
Loop Compensation, Soft Start,  
Comparator, BTST Diode  
0.65-mA Adapter standby quiescent current for  
Energy Star  
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. PRODUCTION DATA.  
 
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