Part Number:BQ2980
hello i designed this schematic but it doesn't work, in pcb i made it 4 layers with a plane for BAT- and another Plane for GND, i don't if is there were the problem comes.
there's no voltage on P-power + and GND 
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BQ2980: BQ2980
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BQ34Z100: Golden image creation issues
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TLC6C5816-Q1: Constant Current version of TLC6C5815?
Part Number:TLC6C5816-Q1
Does TI have a constant current version of the TLC6C5816? I need 16 channels, >20V output pin rating, thermal pad, single resistor current set and PWM /Enable dim capability. Thank you
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TPS2595: Power management forum
Part Number:TPS2595
Hello,
One of my customers is looking to have a slew rate of >20ms for a 5V supply and is considering the TPS2595 --> This is a very long slew rate of 0.25V/ms.
I do not see a maximum capacitor value for CDVDT in the Absolute Maximum table or the Recommended Operating Conditions table, there is only a minimum of 3300pF listed in the ROC table. Is the value of this capacitor limited? If so, what is the maximum value?
Looking at equations 3, the CDVDT value would need to be 168,000pf (168nF) to get the 0.25V/ms. Is this okay?
Thanks in advance for you help!
John
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BQ24070: current sharing
Part Number:BQ24070
Hi,
I have an application where the battery limit is set at 600mA and the Load current is set at high (ILIM1).
ILIM1 high shows a max of 500mA.
If the load requires 1A, what happens?
a. if the input supply can support it, would this provide the 600mA to the battery plus the 1A to the load? (total 1.6A from the supply)
b.would it regulate the current from the source to a max of 500mA and the rest of the current would come from the battery (i.e. discharging the battery with a 500mA current)?
c.would it shut-off the path from the supply and all the current would be coming from the battery? (1A discharge from the battery)?
d. something else...
Thank you!
Best regards,
Alberto
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Application recommendation of 6S1P battery input to 24Vout@1A DC/DC
Hello,
I want to get a recommendation of DC/DC application as below:
Vin = VBAT from 6S1P battery input
Vout = 24V with 1A max.
I can find several candidate. But I want to get cost effective and proper to our application.
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BQ25713: NPN and schottky on HB_LG1
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phase compensation circuit of UCC2895
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UCC27324: UCC27324DGNR: could you provide the V/I curve when UCC27324DGNR OUTB sink current?
Part Number:UCC27324
Hi
customer's request:
Can you help to provide a V/I curve when UCC27324DGNR OUTB sink current? We want to know OUTB internal resistance features VS voltage.
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TPS61169: Can TPS61169 drive LED with 200mA?
Part Number:TPS61169
Hello guys,
One of my customers is considering using TPS61169 with the following conditions.
VIN = 4.5V~5.5V.
VOUT(LED total Vf) = 6.6V (Typ, 2LED in series)
IOUT(LED current) = 200mA
In these conditions, can TPS61169 drive LED with 200mA?
Your reply would be much appreciated.
Best regards,
Kazuya Nakai.
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TPS65930: TPS65930 MADC
Part Number:TPS65930
Hello all,
I have questions about TPS65930 MADC.
MADC is using for internal purpose such as current limit.
Q1: When MADC is used for internal purpose, Is MADC BUSY? Is interrupt output?
Q2: When MADC is used for external purpose during MADC BUSY, Is MADC started after BUSY?
Best Regards.,
Mitsuharu Iwasaki
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TPS3895: Spec for Isense_out
Part Number:TPS3895
TPS389x's Isense_out is described on datasheet page-5, please let me confirm about two points below;
①What is the mean of Min: 0.0003A?
For example, are Minimum spec mean device variation or specified condition?
If device variation, I think that pull-up resistance value need too large.
②Is there specification of typical value for Isense_out?
Best regards,
Satoshi
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TPS3803: TPS3803-01 Question phenomenon that IC is broken.
Part Number:TPS3803
Dear support member,
My customer used TPS3803-01.
There was a phenomenon that IC is broken.
I have a question.
（Specification condition）
Specification condition put minus 6V in VDD and It is a circuit that detects -5.317 to -5.686V.
（Question）
Q1.
Is there a problem with the circuit diagram below?
Q2.
Are there any problems with the specification conditions?
VDD：-6V
SENSE Voltage：-5.317～-5.686V
When the IC is broken
The reset continued and the resistance between SENSE pin and GND was smaller than the normal resistance.
Q3
Is there anything I can think of as a cause?
Best regard.
Bob Lee.
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TPS61089: if Vin > Vout
Part Number:TPS61089
Dear all,
I have seen the similar question.
https://e2e.ti.com/support/power-management/f/196/t/685667
It was mentioned in the post that If Vin>Vo+Vf (Vf is the voltage drop of the upper side body diode), then TPS61089 will works in the pass through mode. both the low side and the high side FET off, only body diode conducts.
We would like to confirm the following questions:
1、If Vin=12V，The Vout is set to 9V，is the actual output voltage zero?
2、If the input voltage starts to drop. When the input voltage drops to any volts, can the boost function of the chip work properly? I mean, in what condition，the chip start to boost.
3、Vin=12V，and the Vout is set to 9V. If Vin is keep 12V for longtime, Will the chip be damaged?
I am looking forward to your reply. Thank you.
Kevin Chen
如果输入电压开始下降，当输入电压降低到几伏时，芯片的升压功能能够正常工作？
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TPS3620-33-EP: Reverse Battery Behavior
Part Number:TPS3620-33-EP
Hello,
I am planning on using the TPS3620-33-EP battery switch in my design. I'm trying to predict the behavior of this chip if a battery is accidentally inserted reversed. Please see below for a simplified version of my circuit.
In this example, XBT1 is the battery holder. Normally, if the battery is inserted reversed into XBT1 and no other power is being applied to the circuit, Q1 would prevent any current from flowing, causing VBAT_CONN to be -3V and VBAT_IN to be 0V. However, I am unsure of what happens if this situation occurs when the TPS3620-33-EP is powered on VDD.
Here are my questions:
- If I am supplying 3.3V to VDD and a battery is inserted reversed, will the TPS3620 drive VBAT to a certain voltage?
- If I am supplying 3.3V to VDD and a battery is inserted reversed, will the TPS3620 allow any current to flow in or out of the VBAT pin?
- I saw on the datasheet that when the TPS3620 sources VOUT from VDD, VBAT has a max leakage current of +/-100nA. Would that still apply in this scenario?
- Is it possible to damage the TPS3620-33-EP from this example use case of reversing the battery? Or does that keep the voltage for the VBAT pin within absolute limits?
Thanks
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TPS54233: TPS54233 WEBENCH design
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TPS92691: Can TPS92691 support CV mode for LED diver?
Part Number:TPS92691
Dear Sir,
I am Alec Chen. FAE form WT. Our costumer is currently choosing TPS92691 for their new design. and RD is asking about if TPS92691 support CV mode for LED diver?We look into the spec and didn't find the application.Therefore, Can you kindly help check if TPS92691 can support CV mode for LED dive? and please give us the reference application for the CV mode. thanks in advance
Hope to heard form your soon
Alec
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TPS56637: TSS(Soft start time), tPODLY(Power-on delay time)、tPGDLY(PGOOD delay time)
Part Number:TPS56637
Hi Team,
I would like to answer the following customer requests.
1) Measurement conditions of TSS(Soft start time)
For the TPS548D22, the condition is described as "VOUT rising from 0 V to 95% of final set point".
Under what conditions are the specifications of this device measured?
2) Specification of minimum value and maximum value of TSS
The data sheet for this device does not include the TSS maximum value or the maximum specification value.
Do you have any of these specifications or reference data?
3) tPODLY(Power-on delay time) specification or measured value
For the TPS548D22, the tPODLY specification is described.
Are there any specifications or measured values for this device?
4) tPGDLY(PGOOD delay time) specification or measured value
For the TPS548D22, the specifications for tPGDLY are described.
Are there any specifications or measured values for this device?
Best regards,
Toshio Fukumoto
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TPS54340: SW has large negative voltage
Part Number:TPS54340
Hi team,
customer use TPS54340 in their new project, and have a questions.
input=24V output=5V, under the light load, the SW waveform as below:
you can see that the low voltage level of SW will lower to -1.54V, while the datasheet show the min voltage of SW is -0.6V. does it will effect device operate?
do you have comments about how to reduce the low voltage?
thanks.
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LM3464AEVAL: The 4 FETs are not behaving identically.
Part Number:LM3464AEVAL
Hello,
I've connected 4 LEDs to the 4 FETs and only 2 FETs can light up the LEDs. I did swap the LEDs to make sure that they are not the issue here. I don't know if this is an issue with the gate drive or the layout or the part itself. This is the second board that I purchased from you. The first board did not light up any LED from any FET. To the first board, I've added the 4.7K at the FET gate and still nothing. Let me know please if you can help with this issue. Thanks. Sana
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