Datasheet > BQ25306RTER

BQ25306RTER

更新时间： 2023-09-03 20:29:29

品牌	Logo	应用领域
德州仪器 - TI		电池
页数	文件大小	规格书
38页	2558K
描述
独立型 17V、3A 1 至 2 节降压电池充电器 \| RTE \| 16 \| -40 to 85

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BQ25306RTER 数据手册

BQ25306

www.ti.com.cn

ZHCSMH4A –MARCH 2020 –REVISED NOVEMBER 2020

7 Pin Configuration and Functions

VBUS

REGN

STAT

ICHG

GND

BAT

Thermal

Pad

(Not to scale)

图7-1. RTE Package 16-Pin WQFN Top View

表7-1. Pin Functions

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

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

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.

13,14

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

11,12

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.

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.

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.

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-kΩresistor from REGN to TS and a

10-kΩresistor from TS to GND. It is recommended to use a 103AT-2 thermistor.

Charge current program input. Connect a 1% resistor RICHG from this pin to ground to program the

charge current as ICHG = K_ICHG/ R_ICHG(K_ICHG= 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

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Product Folder Links: BQ25306

English Data Sheet: SLUSDC7

1 2 3 456 7 8...38

中文翻译

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