Part Number:BQ28Z610
Hi TI.
We use MSP430FR5869 with LDO 1.8V
We want MSP430FR5869 connect with BQ28Z610 via I2C.
Can BQ28Z610's I2C work with 1.8V?
Thanks.
Tam.
↧
BQ28Z610: Voltage of I2C
↧
BQ40Z60: Are there .bqz files available for download from Chemistry IDs that are listed.
Part Number:BQ40Z60
Hi,
Looking to use the BQ40Z60 for 50 version. We are currently using a Panasonic NCA103450 which is listed in the Chemistry ID. Initial questions:
1) What does the chemistry ID do for the configuration? Do i need to still create a golfen image (.bqz file)?
2) Does Panasonic or TI provide completed golden images for batteries listed in the Chemistry ID? If so, how to I get these files?
Thanks
Bryan
↧
↧
BQ40Z60: Can the REGN serve a 5V power supply output?
Part Number:BQ40Z60
I''ll need a 5V power supply to power my pushbutton on/off controller.
I've looked the defenition of PIN REGN of BQ40Z60, and it looks like it can be served as a low current power supply.
I was wondering when the REGN will stop output. I'm assuming as long as the DC adapator is plugged in OR the voltage of cell is higher than 2500mV, the REGN should be functional. Otherwise, the REGN will stop working. If this is true, this is a perfectly always-on output for my pushbutton on/off controller.
Could you confirm that?
thanks.
Lian
↧
bq27421-G1: gas gauge is holding I2C bus
Part Number:bq27421-G1
Our gas gauge occasionally gets into a state where it holds the I2C bus lines and never releases them. The only fix for this so far is to completely remove power from the system.
The suggested fixes in the technical reference doc were not successful (holding SDA & SCL low for 2s, sending stop, repeated start, etc)
We CANNOT just reset the BQ since it is always powered as long as a battery is connected to our system. The device is not user serviceable which means they must allow the battery to die before the device can function normally again.
We believe our preforming the i2C commnications properly. For example when sending i2C communications we wait the suggested time between i2C transactions as suggested in documents slusb85d section 9.5.4.3
1) How can the BQ get into such a state?
2) Is there any way to get it out of that state or prevent it from getting in that state in the first place.
Thanks!
↧
WEBENCH® Tools/BQ28Z610EVM-532: Can't generate golden file with EV2300
Part Number:BQ28Z610EVM-532
Tool/software: WEBENCH® Design Tools
Hello,
I have been struggling for two week to connect my bq28z610 to my computer using EV2300.
I think my problem comes from my 64bit windows.
As a matter of fact I just need the golden file. My batterie are two Alkaline Energizer, which correspond to Chemistry ID 0x0600.
Can anyone provide me a golden file for the bq28z610 and this kind of batterie?
Thanks by advance.
Regards,
Arthur
↧
↧
Linux: How to use the Authenticate feature by bq27541?
Tool/software: Linux
we want to Authenticate the battery pack during each booting up. How can I do that by bq27541?
↧
BQ78350-R1: Remaining Capacity after ShutDown or reset
Part Number:BQ78350-R1
Dear all,
I did the data collection for the GPC and I received the coefficient back by TI. I assume that BQ78350 CEDV is not compatible with VOC75, VOC50 & VOC25 because I did not find any register to put them, right?
So, after putting the new coefficients, I tought that it will resolve my Remaining Capacity issue after a shutdown or reset, but it did not.
After a Full Charge, my Remaining Capacity is 19588mAh with 100% on the Gauge what is correct. I have the autoship enable and my battery goes in shutdown automatically after 120min. When I wake up the battery, the cell voltage is almost the same but the Remaining Capacity is now 15152mAh with 78% on the Gauge!
The ChemID is 2039 for Panasonic NCR18650BF. By the way, there are two different ChemID for the same cell and I do not know the difference.
What can I do to have an accurate Remaning Capacity after a shutdown or reset?
BR,
Pierrick.
↧
BQ27220: Fuel Gauge for Single-Cell, 6000mAh LiFePO4 cell
Part Number:BQ27220
Simple Question: Can I use the bq27220 as a fuel gauge for a Single-Cell, 6000mAh LiFePO4 cell?
I've read through the whole datasheet and technical reference manual and it seems that it might work (although the parametric search doesn't give me this part for gauging LiFePO4 cells).
The only place where I'm not sure is with the LDO regulator input, i.e. what happens if the battery voltage falls below 2.45V (but still above 2V where the undervoltage lockout would be triggered).
Also, we will charge with quite high currents (3-4A), but I've calculated that the max discharge / charge current the BQ27220 can measure is +/-8A (80mV Input differential voltage range / 10mOhm shunt), right?
Thanks!
↧
BQ78350-R1: Help 78350-R1 + bq76920
Part Number:BQ78350-R1
Hello All,
Help to establish the correct paraneters for bq78350-R1. I have only SMB.
I have BMS 5S bq78350-R1 V1.03 + bq76920.
Rsene 20mR - 1W, current SCD 6,65A current OCD 4,15А.
1. I set AFE Celll Map to 1F. write.
2. Send FET_EN.
3. Send RESET + Power Off
4. Set DC 21V.
5. Power ON.
6 Boot.
7 Set AOLD HEX to 5C. 320ms, 83mV, write
8 Set ASCD HEX to 8C 100uс 133mV,write.
9 Send RESET.
10 connected load 2A. Load - "ON".
BMS cut off the batteries. :( :(
11 Load off.
Why does not BMS hold the load?
Thank you
Andrew
↧
↧
BQ27GDK000EVM: Calibration of bqStudio display
Part Number:BQ27GDK000EVM
bqStudio Version 1.3.54 running Windows 7 64 bit OS. Using the bq27GDKEVM revA with external 27421 gauge I am able to cycle a single 18650; however, I read significantly different current during the charge cycle than what is set - setting is 500 mA and the reading on the GDK window on the LHS of the bqStudio disply is 372 mA. Complicating this is the gauge at the bottom of the LHS which reads expected current. During discharge, the LHS window shows nominal setpoint (-1000 mA) while the gauge icon indicates -1230 mA. Following the calibration tab in bqStudio does not seem to alter either readout. Is there a procedure for reconciling these displays? and is there a more detailed calibration procedure for the gauge?
↧
BQ40Z60EVM-578: FD Flag doesn't set during learning cycle
Part Number:BQ40Z60EVM-578
Hello,
I am using a bq40z60 eval board to test out the chip and am trying to finish a learning cycle. I didn't have any luck with the bqstudio learning cycle tool so I am now trying to do it without it. However, when I discharge below what I have set for FD and TD, they don't get set. I've included my log file and a screenshot of my settings. Do you need these flags to be set in order to finish the learning cycle or should I not even worry about it?
Thank you,
Adam
(Please visit the site to view this file)
↧
BQ28Z610: SLUSAS3_Rev B Power Supply Requirements Question
Part Number:BQ28Z610
I have a question regarding section 10 of the bq28z610 IC datasheet. Section copied below...
10 Power Supply Requirements
There are two inputs for this device, the PACK input and VC2. The PACK input can be an unregulated input from
a typical AC adapter. This input should always be greater than the maximum voltage associated with the number
of series cells configured. The input voltage for the VC2 pin will have a minimum of 2.2 V to a maximum of 26 V
with the recommended external RC filter.
My question is in regards to "This input [PACK] should always be greater than the maximum voltage associated with the number of series cells configured." This would make sense assuming that this statement is from a charging perspective, but there is no mention of charging at all. Also, why isn't VC1 mentioned as an input? Is this because VC1 is only a voltage reference line, implying that VC1 and VC2 must be shorted together if the gauge is used in a singe cell mode?
↧
BQ40Z50-R2: Difference between -R1 and -R2 chips
Part Number:BQ40Z50-R2
We are currently designing smart battery with BQ40Z50-R1 and I just found out that there is BQ40Z50-R2 coming also.
What are the differences between -R1 and -R2? Do you have any documentation that would tell those differences.
↧
↧
BQ34Z100-G1: Example Code Stub?
Part Number:BQ34Z100-G1
Hi,
I have a customer that has the following question I was hoping you could help with?
"I need to talk to the bq34z100g1 gauge over i2c to read data. I notice the website doesn't have any code samples for the same. Can you send me a code stub if possible??"
Thank you!
Regards,
Drew
bq34z100g1
↧
BQ27220: MACDataLen comes up as 36 byte transfer
Part Number:BQ27220
Hello,
I am following the example in Chapter 6.1 in the SLUUBD4 BQ27220 user manual.
Steps 1 – 7 are working fine, but the data length in Step 8 (MACDataLen) returns 36. Since only 32 bytes (max) are possible for data transfer in the MACData buffer, how is 36 happening?
I have also tried setting MACDataLen to 32 before executing step 5, but 36 still gets returned.
The routine (attached) that I am having trouble with is BQ27220::get_data_32(....). Done on mbed.org K64F platform
uint32_t BQ27220::get_data_32(BQ27220_TypeDef& dataSTR, uint16_t sub_cmmd, int length)
{
if(length > 32) length = 32;
i2c_Buf[0] = BQ_SUB; //0x3e
i2c_Buf[2] = sub_cmmd >> 8;
i2c_Buf[1] = sub_cmmd & 255;
//pc.printf("dat-32a: %02x %02x %02x \r\n", i2c_Buf[0], i2c_Buf[1], i2c_Buf[2]);
_i2c.write((int)BQ27220_ADDR, i2c_Buf, 3, false);
wait_us(66);
Thread::wait(5);
i2c_Buf[0] = BQ_MACDATASUM; //0x60
_i2c.write((int)BQ27220_ADDR, i2c_Buf, 1, true);
_i2c.read((int)BQ27220_ADDR + 1, i2c_Buf, 1, false);
wait_us(66);
Thread::wait(5);
dataSTR.macSumReg = dataSTR.i2c_Bufx[0];
//pc.printf("dat-32c: %02x \r\n", i2c_Buf[0]);
i2c_Buf[0] = BQ_MACDATALEN; //0x61
_i2c.write((int)BQ27220_ADDR, i2c_Buf, 1, true);
_i2c.read((int)BQ27220_ADDR + 1, i2c_Buf, 1, false);
wait_us(66);
Thread::wait(5);
dataSTR.macLenReg = dataSTR.i2c_Bufx[0];
uint8_t lx = dataSTR.macLenReg;
//pc.printf("dat-32L: %02x \r\n", i2c_Buf[0]);
if(lx > length) lx = length;
i2c_Buf[0] = BQ_MACDATA; //0x40
_i2c.write((int)BQ27220_ADDR, i2c_Buf, 1, true);
_i2c.read((int)BQ27220_ADDR + 1, i2c_Buf, length, false);
wait_us(66);
Thread::wait(5);
for(int i = 0; i < length; i++) {
dataSTR.macData[i] = dataSTR.i2c_Bufx[i];
pc.printf("%02x ", dataSTR.i2c_Bufx[i]);
}
dataSTR.checksum = calc_checksum(dataSTR, lx);
pc.printf(" mdl: %3d mdcs: %02x cs: %02x \r\n", dataSTR.macLenReg, dataSTR.macSumReg, dataSTR.checksum);
return ((uint32_t)dataSTR.subReg);
}
↧
BQ34Z950: [NR] bit in DF.Configuration_1
Part Number:BQ34Z950
Dear TI,
Based on the BQ34Z950 technical reference Dec 2014, in Data Flash, Configuration class, Operation Cfg B register, the [NR] bit is no longer appeared in the register and replaced by [RSVD] bit. Thus, we need to set this bit as '0'.
If we refer to BQ20Z95 Application Book Dec 2006, this '0' bit refers to removable pack.
1) Why the [NR] bit is no longer a choice of bit to be set in BQ34Z950?
As far as I understand that the removable pack uses the System Present pin (PRES) while this pin is now assigned as NC (Not Connected) on BQ34Z950IC.
2) However, our requirement is to design a battery standalone.
Can we set '1' to this particular bit in BQ34Z950 in order for us to comply with our requirement? If can, is there any unpredictable or significant implication to the end product?
FYI, we did used your BQ20Z95 Gas Gauge IC in one of our product but we're not using the same IC for our new battery because it needs a DQ pin to communicate with the host.
3) In your website, the BQ20Z95 is already declared NRND. When this IC would be obsolete? What is the best replacement for this IC if obsolete?
Thanks in advanced.
↧
BQ78350-R1: Unrecoverable failure during .srec download
Part Number:BQ78350-R1
Hi,
We have had two occasions in a row where downloading the .srec file into a BQ78350-R1 has failed and subsequent communication with the BQ78350-R1 has not been possible.
The failure occurred on two different PCB assemblies. On the first occasion, replacing the device fixed the problem and downloading the .srec file worked without a hitch.
The second time, we are waiting for replacement chips to arrive.
Is this a known problem, and is it normal for a chip to be put into an unrecoverable state if communication fails during firmware download?
The SMBus data and clock signals look OK and I can see bqstudio trying to communicate if I manually select the BQ78350-R1.
BQstudio version is 1.3.54
and we are using the EV2300 version 3.1m
Thanks in advance for any ideas as to what is going wrong.
Alan Ogburn
↧
↧
BQ27520-G4: Timeouts during gauge updating
Part Number:BQ27520-G4
Can't find any document, which specifies timeouts after those operations:
- seal
- unseal
- rom mode enter
- rom mode exit
I just found in the "Updating the bq275xx Firmware at Production" document that there should be a 250 ms delay after ROM mode exiting. But the *df.fs file (got it by reading bq27520-g4 via bqStudio) has a 4000 ms delay. So, what is the correct value?
One more question. Should I seal device after successful updating? I think, so, but diagrams in the document above doesn't show that.
↧
BQ27530-G1: Internal Temperature Sensor BAT_DET
Part Number:BQ27530-G1
I am using the BQ27530-G1 together with the BQ24161 battery charger. The battery pack that is used in the device is comprised of two 18650 Li-Ion cells in parallel with a capacity of 4800 mAh and does not have a temperature sensor. I have configured the BQ27530 to use the internal temperature sensor by clearing the TEMPS bit in OpConfig register. I read in another post on this forum that to use the internal temperature sensor and detect the battery that the BI/OUT should be pulled to VCC, pin D1 on chip, with a 1.8M resistor and a 33nF capacitor to ground. Also BI/TOUT should be connected to TS with a 18.2K resistor and TS connected to ground with a 10K resistor. In this configuration the BAT_DET flag is always set, with or without the battery connected, and the fuel gauge is enabling charge CE on the BQ24161.
Is there something else that need to be configured in the BQ27530 to correctly detect when the battery is removed?
Register settings:
OpConfig = 0x6166
OpConfigB = 0x6F
OpConfigC = 0x3C
Charger Options = 0x20
Charger Reg 00 = 0x00
Charger Reg 01 = 0x00
Charger Reg 02 = 0x5C
Charger Reg 03 = 0x02
Charger Reg 04 = 0x00
Charger Reg 05 = 0x02
Charger Reg 06 = 0x00
Charger Reg 07 = 0xC8
Status:
Control Status = 0x6285
Flags = 0x0138
Application Status = 0x00
ChargerStatus = 0x00
Charger Reg0 = 0x30
Charger Reg1 = 0x30
Charger Reg2 = 0x58
Charger Reg3 = 0x8E
Charger Reg4 = 0x45
Charger Reg5 = 0xD2
Charger Reg6 = 0x00
Charger Reg7 = 0xC0
↧
BQ40z50-R1: Looking for an easier way to load golen files for BQ40z50-R1
Part Number:BQ40z50-R1
Hello Folks!
Can someone please help me with the following. I am having issues generating Golden files for a solar battery BMS. I would like to test each BMS before incorporating them into a battery pack. It takes a lot if time to generate these files. Is there an easier method for pulling this data? This is for part number BQ40z50-R1
Thank you!
↧
