• 

  Lauren Mayfield

  • 17 days ago
  • Power management
  • Power management forum

  BQ21040: Charge current dropping as Vin changes

  TI Thinks Resolved

  Part Number: BQ21040 Hi, My customer seems to be having an issue similar to this one, but looks like they stopped responding so there wasn't a resolution. Inquiry from the customer- Please find our charging circuit as below. Per our design...
• 

  Roshan Prajapati

  • 1 month ago
  • Power management
  • Power management forum

  BQ21040: Regarding BQ21040DBVR charging circuit

  TI Thinks Resolved

  Part Number: BQ21040 Hi, We are developing system with BQ21040DBVR charging circuit to recharge VL-3032 Panasonic Lithium Vanadium Pentoxide battery. so, the query is can we charge VL-3032 battery with BQ21040DBVR recharging circuit. kindly, do the...
• 

  Gianluca Biondi

  • 1 month ago
  • Power management
  • Power management forum

  BQ21040: Vin remains high after adapter removed

  Part Number: BQ21040 I have a board as the Tipical Application in datasheet. Everything works fine but, I'm trying to sense when a charger is connected (Vin goes high) so I have connected an input pin of my microcontroller to Vin with a pull-down...
• 

  John Beck2

  • 2 months ago
  • Power management
  • Power management forum

  BQ21040: Fails to restart discharged LiPoly

  TI Thinks Resolved

  Part Number: BQ21040 I am developing a product powered by a LiPoly battery. If the battery is allowed to discharge too far, the protection circuit turns off access to the battery (@2.5V). It takes raising the battery terminals to >3.4V for the protection...
• 

  Koji Ikeda

  • 2 months ago
  • Power management
  • Power management forum

  BQ21040: fast charge current range

  • Resolved

  Part Number: BQ21040 Hello support team, Could you tell me bq21040 min fast charge current setting
• 

  Mike Y

  • 2 months ago
  • Power management
  • Power management forum

  BQ21040: 10 hour cut-off timer and load

  Part Number: BQ21040 Hello Everyone, I am using BQ21040DBVR for a project. Here are my connections: TS (1)- 10k resistor - ground CHG (3) - Not connected VOUT (2) - Load and battery GND (5) - GND ISET (4)- 680 ohm resistor - ground Vin...
• 

  Leo Marrero89

  • 3 months ago
  • Power management
  • Power management forum

  BQ21040: BQ21040 cannot charge Lithium Polymer with Protection Circuit

  • Resolved

  Part Number: BQ21040 Hi, We are using the BQ21040 with a Lithium Polymer cell that has a protection
• 

  JDJ

  • 5 months ago
  • Power management
  • Power management forum

  BQ21040: Rdson

  • Resolved

  Part Number: BQ21040 Hi, What is the Rdson for BQ21040 ? Thanks!
• 

  user6422181

  • 5 months ago
  • Power management
  • Power management forum

  BQ21040: Fast-Charge 10 Hour Timer

  TI Thinks Resolved

  Part Number: BQ21040 Good day, I wanted to clarify whether the 10-hour fast charge timer on this chip is the duration of fast charging at constant current (i.e. only the time between the end of pre-charge and before constant voltage regulation/termination...
• 

  David Nelson2

  • 4 months ago
  • Power management
  • Power management forum

  BQ21040: Need a better definition for Constant Current / Constant Voltage

  Part Number: BQ21040 Need to understand at what voltage does the BQ21040 start to reduce the current? I was expecting it to be around 4.2V but it actually starts dropping at 3.8V. I'm not using the temperature sense and I am trying to charge a 3.7V...

Didn't find what you are looking for? Post a new question.

• Ask a new question