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BQ25300

更新时间: 2024-10-29 02:51:39
品牌 Logo 应用领域
德州仪器 - TI 电池监控
页数 文件大小 规格书
32页 1669K
描述
BQ25303J Standalone 1-Cell, 17-V, 3.0-A Battery Charger with JEITA Battery Temperature Monitoring

BQ25300 数据手册

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BQ25303J  
SLUSDT8 – FEBRUARY 2021  
www.ti.com  
7 Pin Configuration and Functions  
VBUS  
REGN  
STAT  
ICHG  
1
2
3
4
12  
11  
10  
9
GND  
GND  
BAT  
Thermal  
Pad  
VSET  
5
6
7
8
(Not to scale)  
Figure 7-1. RTE Package 16-Pin WQFN Top View  
Table 7-1. Pin Functions  
PIN  
I/O(1)  
DESCRIPTION  
NAME  
NO.  
Charger input voltage. The internal n-channel reverse block MOSFET (RBFET) is connected between  
VBUS and PMID with VBUS on source. Place a 2.2uF ceramic capacitor from VBUS to GND and place it  
as close as possible to IC.  
VBUS  
1
P
Connected to the drain of the reverse blocking MOSFET (RBFET) and the drain of high-side MOSFET  
(HSFET). Place ceramic 10μF on PMID to GND and place it as close as possible to IC.  
PMID  
SW  
16  
13,14  
15  
P
P
Switching node. Connected to output inductor. Internally SW is connected to the source of the n-channel  
HSFET and the drain of the n-channel LSFET. Connect the 0.047μF bootstrap capacitor from SW to BTST.  
High-side FET driver supply. Internally, the BTST is connected to the cathode of the internal boost-strap  
diode. Connect the 0.047μF bootstrap capacitor from SW to BTST.  
BTST  
GND  
REGN  
BAT  
P
Ground. Connected directly to thermal pad on the top layer. A single point connection is recommended  
between power ground and analog ground near the IC GND pins.  
11,12  
2
P
Low-side FET driver positive supply output. Connect a 2.2μF ceramic capacitor from REGN to GND. The  
capacitor should be placed close to the IC.  
P
Battery voltage sensing input. Connect this pin to the positive terminal of the battery pack and the node of  
inductor output terminal. 10-µF capacitor is recommended to connect to this pin.  
10  
AI  
Battery temperature voltage input. Connect a negative temperature coefficient thermistor (NTC). Program  
temperature window with a resistor divider from REGN to TS and TS to GND. Charge suspends when TS  
pin voltage is out of range. When TS pin is not used, connect a 10-kΩ resistor from REGN to TS and a 10-  
kΩ resistor from TS to GND. It is recommended to use a 103AT-2 thermistor.  
TS  
7
4
AI  
AI  
Charge current program input. Connect a 1% resistor RICHG from this pin to ground to program the  
charge current as ICHG = KICHG / RICHG (KICHG = 40,000). No capacitor is allowed to connect at this pin.  
When ICHG pin is pulled to ground or left open, the charger stop switching and STAT pin starts blinking.  
ICHG  
Charge status indication output. This pin is open drain output. Connect this pin to REGN via a current  
limiting resistor and LED. The STAT pin indicates charger status as:  
Charge in progress: STAT pin is pulled LOW  
Charge completed, charge disabled by EN: STAT pin is OPEN  
Fault conditions: STAT pin blinks.  
STAT  
3
AO  
Charge Voltage Setting Input. VSET pin sets battery charge voltage. Program battery regulation voltage  
with a resistor pull-down from VSET to GND:  
Floating (R > 200kΩ±10%): 4.1V  
Shorted to GND (R < 510Ω): 4.2V  
R = 51kΩ ± 10%: 4.35V  
VSET  
POL  
9
5
AI  
AI  
R = 10kΩ ± 10%: 4.4V  
The maximum allowed capacitance on this pin is 50pF.  
EN pin polarity selection.  
Copyright © 2021 Texas Instruments Incorporated  
Submit Document Feedback  
5
Product Folder Links: BQ25303J  
 

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