Part Number:LM25085A
Hi
We plan to operate LM25085A with following requirement.
INPUT:17V-25V
OUTPUT:16V/3A (8A peak)
Enable
LM25085AMYEEVAL could not support for this requirement.
Could it be feasible to design custom board using LM25085A by changing inductor and P-FET from EVM to being capable of requirement?
BestRegards
Part Number:BQ25601
HI,
My customer concerns Undershoot at Switching node output and PWN high side driver positive supply.
Figure 1. Undershoot for BTST pin
Figure 2. Undershoot for SW1 and SW2 pin
The undershoots for SW and BTST over minimum Absolute Max. I guess this undershoot flow the internal low side body diode and it is forward direction, so , it may not take a damage for silicon. But could you please give me your comment for this undershoot if it take damage to silicon? If it take damage to silicon, could you please give countermeasure?
Regards,
Nagata.
Part Number:BQ24296M
dear TI,
My customer used the BQ24296M, there are 3% failed for the SW pin short to ground. they set the 2A charger current, they have made the high and low temperature as below attached. and pass.
while VCC is 12V, now customer want to know this root cause for this failed.
and when charge current is 2A,
Part Number:BQ77915
Hi,
We are intending to use external MOSFETs as we require higher balancing current than 50mA.
When will the external MOSFET turn on ?
Is there any specific part number for the external MOSFETs ?
How will the external MOSFET turn on?
Thank You,
With reagrds
Raahul Bharadwaj
Part Number:TPS54340
Hi Team,
Here are some question about OCP and shorted circuit protection:
1. OCP and shorted circuit protection is retry or latched?
2. If it's retry, then what is the retry mechanism when OCP or shorted circuit still exist?
Thank you.
C.T.
Part Number:TPS54331
Hi,
I have this design, TPS54331 is enabled using the 100k internal pull up of microcontroller and an external 100k pull down. The uC set the pin as input 100k pull up after reset, so TPS54331 is on when the uC is powered. After this uC can disable TPS54331 setting the gpio as output low.
In datasheet EN pin of TPS54331 is used to perform Undervoltage Lockout, setting the pull up to VIN, but do not appears information to use EN pin as enable/disable through other chips like uC powered at lowers voltages.
Is it schematic suitable to perform an enable/disable on the TPS54331?
BR.
Part Number:LM3644
Dear Ti experts,
Below is from the datasheet of Lm3644, does it mean LM3644 can output 179ma maximum current in seperated channel at the same time ? Besides， when we combine the 2 channel, can it reach 179ma+179ma to driver 1 LED? Thanks a lot.
From datasheet:
In Torch mode, the LED current sources (LED1/2) provide 128 target current levels from 0.977 mA to 179 mA or 1.954 mA to 360 mA on LM3644TT
Part Number:LMR23630
Following is the circuit of an existing design:
As in normal buck regulators, feedback path is R1 and R2.
Apart from that their is an additional differential voltage feedback path. This path will be active once the voltage across the sense resistor is enough to give the feedback to turn-on the diode.
Could you suggest how to calculate phase and gain margin?
Part Number:UCC28063
I also have the phase issue. Why does the application note SNVA796–October 2017 also have non 180-degree phase shift when input voltage is 264V?
The current sensor signal of my PFC is: as it can be seen, currents are not equal.
The output voltage and input mains current are:
Part Number:BQ34Z950
Dear All,
I am using BQ34z950 as a BMS for my battery pack. I have a battery pack of 16800mV 43200 mAh. Every time I read the Relative State of Charge(0x0D) register via SMBUS it shows 100, and Absolute state of charge(0x0E) shows 152. How to get correct values of these registers(since I think something is wrong). I write the Design Capacity(0x18) = 43200 mAh and design Voltage (0x19) = 16800 mV.
Should I have to set the AtRate(0x04) with the value of current read from(0x0A)? Or I am leaving something behind?
Please help!!!!!!!
Regards,
Aman
Part Number:UCD3138A64OEVM-662
Tool/software: Code Composer Studio
void init_uart0(void)
{
volatile unsigned char rx_byte;
Uart0Regs.UARTCTRL3.bit.SW_RESET = 0; //software reset while initializing UART
Uart0Regs.UARTCTRL0.bit.DATA_SIZE = 7; //8 bits
Uart0Regs.UARTCTRL0.bit.STOP = 1; //2 stop bits
Uart0Regs.UARTCTRL0.bit.SYNC_MODE = 1; //asynchronous mode
Uart0Regs.UARTHBAUD.bit.BAUD_DIV_H = 0;
Uart0Regs.UARTMBAUD.bit.BAUD_DIV_M = 0;
Uart0Regs.UARTLBAUD.bit.BAUD_DIV_L = 49; //for 38400 //47 for control board, 44 for open loop
Uart0Regs.UARTRXST.bit.RX_ENA = 1 ;//enable RX
Uart0Regs.UARTTXST.bit.TX_ENA = 1;//enable TX
Uart0Regs.UARTINTST.all = 0xff; //these two statements are supposed to clear the status bits
Uart0Regs.UARTINTST.all = 0;
rx_byte = Uart1Regs.UARTRXBUF.bit.RXDAT; //clear RXRDY flag
Uart0Regs.UARTIOCTRLTX.bit.IO_FUNC = 1; //enable transmit pin
Uart0Regs.UARTIOCTRLRX.bit.IO_FUNC = 1; //enable receive pin
Uart0Regs.UARTCTRL3.bit.CLOCK = 1; //internal clock select;
Uart0Regs.UARTCTRL3.bit.SW_RESET = 1; //software reset released UART init done?
Uart0Regs.UARTIOCTRLSCLK.bit.IO_FUNC = 0; //disable external clock for UART.
Uart0Regs.UARTTXBUF.all = ' '; //put out a byte to get things started.
}
void char_out_0(char data)
{
volatile char rx_byte;
while(Uart0Regs.UARTTXST.bit.TX_RDY == 0)
{
if(Uart0Regs.UARTRXST.bit.RX_RDY == 1)
{
rx_byte = Uart0Regs.UARTRXBUF.bit.RXDAT; //clear RXRDY flag
}
pmbus_handler();
}
Uart0Regs.UARTTXBUF.all = data; //put out a byte
}
**************************************************************************************************
sir above code for uart0, Sir i want a code for uart1 so that i want to send my char "At command"to my wifi please can you send me the initialisation or code please. above code creating problem error after certain changes had been done.
hi team:
I want designed VIN 11.5 – 13.8 V,Don't isolate output Vout ±17.5V / 2A ,do you have Any Suggestions? Thanks!
Part Number:BQ25703A
HI
first case: the power supply is not removed How the charger powers the system and charges the battery at the same time?
second case: when the power is removed How does the battery power the system
Part Number:TPS56C215
Hi Team,
We want to use SS pin of TPS568215& TPS56C215 for fast discharge purpose. Is it workable or any potential risks? Please comment, thanks!
Condition#1, SS pin is shorted to ground before power-on for output disabled, will the device be damaged or any other reliability concerns?
Condition#2, SS pin is pulled to ground after the output voltage reaches its target for output shutdown, will the device be damaged or any other reliability concerns?
Best regards,
Sam Ting
Part Number:TPS61194-Q1
HI Sir，
the specification shows "Outputs can be Combined Externally for
Higher Current per String"
it that means combine the two outputs together can double the output current?
if I want to get 140mA how should I do,
please advise,
thanks!
with best regards,
Peter Zha
Part Number:TPS3850
Looking on the datasheet suggests that a 0.9V part would be available but it is not listed in the orderable information of the datasheet or the web site. I would expect the part number to be TPS3850G09DRCR.
Also would it be possible to get a 1V or 1V5 part with the +/-4% fault window.
Best Regards,
Dan
Part Number:BQ28Z610
Hello!
I'm facing unexpected behavior when using HTCFR26650 2 cell pack.
As soon as temperature is lower than some threshold the full charge and remaining charge estimation goes wild and drops to values well lower than 1000mAh.
The full design capacity is 6400mAh (for 2 cell pack) but the gauge does never report anything near this value. The value varies between 5700 and 6100. But I guess this is a separate issue that I would also like to get a little help about.)
Some relevant (I hope) bits of information:
- I selected 0x444 CHEM_ID and everything works pretty okay on temperature ranges > ~10C
- We're using internal temperature for IT estimation. TS1 is not connected to a thermostat.
- Settings->Configuration->Temperature Enable is set to 0x01 (TSInt).
- Protections: UTC = 0C, UTD=-20C.
I'm also attaching gg.csv with all DF parameters.
(Please visit the site to view this file)
Thanks in advance.
Best regards.
Part Number:BQ24259
Hi,
in datasheet I2C is pulled up to VREF, but I can't find VREF range for the device to work correctly.
And it only gives Vih and Vil when VREF=1.8V, how about other VREF voltage?
Part Number:UCC5320
Hello,
I have to use a isolated driver to drive MOSFET quickly.
Data sheet page 27 § 10.3 say :
For operation with unipolar supply, the VCC2 supply is connected to 15 V with respect to VEE2 for IGBTs, and 20 V for SiC MOSFETs.
The VEE2 supply is connected to 0 V.
In this use case, the UCC53x0 device with Miller clamping function (UCC53x0M) can be used.
I don't use Miller clamp fonction.
I want to know if i can use the IC with unipolar VCC2 15V for driving Mosfet ?
Is 20V VCC2 mandatory only in the case with Miller clamp fonction ?
Thanks for help
Thierry Zimmermann
Part Number:LM5050-2
Hello Team,
Could you help with our customer's question:
We are going to implement circuit from Figure 25 of datasheet(SNVS679B –NOVEMBER 2010–REVISED MARCH 2013).
What is the usage of D1? It will not save from the parasitic inductance of the wires as this described in Fig.22.
Also we cant understand the usage of D2.
As i know, In the case of a short circuit in the input power line while Q1 is not locked with an LM5050 chip will leak Reverse current. Parasitic inductance (output circuit) is charged by this reverse current, and at the moment of locking Q1 an emf of self-induction of parasitic inductance will be formed.
It will strive to keep the parasitic inductance constant. For this purpose, the authors of Datasheet propose to put a suppressor (aka Zener diode) D2 and limit this current by it
But in my opinion it is easier to put a ceramic capacitance parallel to the Cout electrolyte which is charged by the current stored in the parasitic inductance of the output circuit and will provide an output voltage rise of no more than 1V or even less, because the current in the parasitic inductance of the output circuit will depend on the time and speed of the locking of the transistor, and its growth rate will be determined by the same parasitic inductance of the energy will not be much.
The transistor we are going to use is CSD19531Q5A.
BR,
Ilya.