BQ25A Datasheet – Battery SMBus Charge Controller – TI

Posted on December 26, 2020January 22, 2021 by pinout

This is one of the Controller types.

Part Number: BQ24725A, Marking : BQ25A

Description

1-4 Cell Li+ Battery SMBus Charge Controller

Package: 20-pin 3.5 × 3.5 mm² VQFN Type

Manufacturer: Texas Instruments

See the preview image and the PDF file for more information.

Image

Description

The bq24725A ( Marking : BQ25A ) is a high-efficiency, synchronous battery charger, offering low component count for space-constraint, multi-chemistry battery charging applications.

The bq24725A utilizes two charge pumps to separately drive n-channel MOSFETs (ACFET, RBFET and BATFET) for automatic system power source selection.

SMBus controlled input current, charge current, and charge voltage DACs allow for very high regulation accuracies that can be easily programmed by the system power management micro-controller.

The bq24725A uses internal input current register or external ILIM pin to throttle down PWM modulation to reduce the charge current.

BQ25A Pinout

Features

1. SMBus Host-Controlled NMOS-NMOS Synchronous Buck Converter with Programmable 615kHz, 750kHz, and 885kHz Switching Frequencies

2. Automatic N-channel MOSFET Selection of System Power Source from Adapter or Battery Driven by Internal Charge Pumps

3. Enhanced Safety Features for Over Voltage Protection, Over Current Protection, Battery, Inductor and MOSFET Short Circuit Protection

BQ25A Marking Information

Official Homepage: https://www.ti.com/product/BQ24725A

BQ25A Datasheet

Related articles across the web

INR18650-25R Datasheet – 2,500mAh, 3.6V, Battery – Samsung

Posted on December 24, 2020December 8, 2023 by pinout

Part Number: INR18650-25R

Function: Lithium-ion Rechargeable Cell

Height : 64.85 ± 0.15mm, Diameter : 18.33 ± 0.07mm

Manufacturer: Samsung SDI

Image :

Characteristics

1. Standard charge
This “Standard charge” means charging the cell CCCV with charge current 0.5CmA (1,250mA), constant voltage 4.2V and 125mA cut-off in CV mode at 25℃ for capacity. .

2. Rapid charge
Rapid charge means charging the cell CCCV with charge current 4A and 100mA cut-off at 25’C

3. Nominal discharge capacity
The standard discharge capacity is the initial discharge capacity of the cell, which is measured with discharge current of 500mA(0.2C) with 2.5V cut-off at 25’C within 1hour after the standard charge.
Nominal discharge capacity ≥ 2,500mAh Which complying to the minimum capacity of IEC61960 standard.

4. Standard rated discharge capacity
The standard rated discharge is the discharge capacity of the cell, which is measured with discharge current of 10A with 2.5V cut-off at 25’C within 1hour after the standard charge.
Standard rated discharge capacity ≥ 2,450mAh

5. Initial internal impedance
Initial internal impedance measured at AC 1kHz after standard charge Initial internal impedance ≤ 18mΩ

6. Temperature dependence of discharge capacity
Capacity comparison at each temperature, measured with discharge constant current 10A and 2.5V cut-off after the standard charge is as follows.

Nominal specifications

INR18650-25R Datasheet