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LTC3124, LTC4415
Hello,I have a backup power circuit below that I like your input on it. LTC3124 to boost the voltage to 5V, and LTC4415 Oring Diode to switch to back-up power. Thank you in advance,Dino
View ArticleHow to handle the pins related negative output on ADP5071?
Hi, My customer use ADP5071 and would like to know how to handle VREF, COMP2, FB2 and SW2 if they don't need negative output ? Keiichi Okuji @ ADKK
View ArticleLT3439
Hi. I use DC/DC transformer driver LT3439 and use transformer: Part Number: 750315213 (Wurth Electronic) with coefficient 1:1. Input and output voltage is 15V. Output current is 0.2A. And driver is...
View ArticleI need ref design for LTC3536 Vin 3V-4V2 and Vout 5V@700mA, DS is unclear...
Hi,DS is ok for 3V3 output design but 5V design is limited to Vin 4v2-5v5.I need to do Vin 3V-4V2 and Vout 5V@700mA.Thanks for your help.
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LT3952 to power 450mA 42V LEDs with 4000:1 PWM
Hi I am trying to design a LED driver circuit to drive string of two LEDs at 450mA and 42V (constant current - voltage is maximum from LED specs, in practice it is around 39-40V). The voltage on input...
View ArticleADUM5230 "output short-circuit pulsed current" "sourcing" and "sinking"
I wants to use ADUM5230 with AUIRGB4062D1 in new device (AC 3-phase motor converter, 100...350V in dc power line). Max switching frequency: 20 kHz. Gate capacitance: about 1,5 nF Questions: 1. Can...
View ArticleLTC free samples not available
Hello, Since the day ADI acquired LTC, why ADI stopped giving free samples for some of the LTC ICs (LTC3525, LTC2942)?Any help in this regard will be useful. Thank you,Nahit
View ArticleADUCM4050 ADC power supply
Hi EZ, I am currently doing a schematic using the ADUCM4050, and his internal ADC, and I would like to know few stuff : Is that possible to have Vbat_ADC set to a different value than the other Vbat of...
View ArticleLTC2977 Vout enable pin behavior without power supply
Hallo, I would like to ask about Vout Enable Output Pin state when LTC2977 is not powered up. Does it behave as pull-down (weak or strong) or is simply floating. The output circuit schematics will...
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Very precise 54V DC power supply
I need to build a very stable DC power supply with a variable output (51 to 56 VDC) at a very low current output ( 100 mA). But the driff and stability needs to be very less than 5 mV. The circuit will...
View ArticleLTC4020 no-load stability
HiWe are using the LTC4020 to charge a lead-acid battery and are having problems with no-load stability of the DC-DC converter. We see this happening during NTC events, where the battery gets...
View ArticleLTC4020 NTC hysteresis behaviour
We are using the LTC4020 to charge a lead-acid battery, with the NTC pin used to enable charging within temperature range of the battery.The LTC4020 has an upper and a lower voltage limit on the NTC...
View ArticleADP5090 with dual parallel PV
Is it possible to have 2 PV's in parallel with the ADP5090?
View ArticleAbout the input of ADP5091
Hi, thanks to anyone . I have a question about the input of ADP5091. I have a PV whose mppt is 4V and 700mA. If I put a zener diode between the PV and 5091, can I connect it directly?Is current...
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How to use the sync pin of the LTC3805
Hello People, I'm using a LTC3805 in a sepic design and I have some questions regarding the sync input. I have a Vin of 19V to 24V, Vout of 20V and -20V at Iout(max) of 260mA and -200mA. I use two...
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How to solve LTC4446 problems?
LTC4446 is used as a driver for high-side and low-side outputs. Load is inductive (200uH), Vin=60V, Vcc=12V.LTC4446 fails to operate after several hours. The symptoms are, in a case, excessive current...
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LT8315 non isolated buck application
I am trying to simulate non isolated buck converter with LT8315 ic given in datasheet as application example of LT8315 in LTspice software. the output is not regulated and does not give 12 volts as...
View ArticleADP5091的电阻配置问题
为了在5091上使用锂电池，我做了如下配置，使得充电电压小于4.2V，放电电压高于2.7V Rpg1=6.2M Rpg2=3M Vpg=3.06VRte1=5.6M Rte2=3.3M Vte=4.08VRbk1=6.8M Rbk2=3.0M Vbk=3.25Rsd1=6.8M Rsd2=3.9M Vsd=2.7V...
View ArticleLTC4368 weak gate drive
I have implemented the LTC4368 with the following configuration:VIN(MIN) = 40VVIN(MAX) = 52VOCP = 5A Nominal input voltage is 48V. This is part of a larger system, however all that is currently...
View ArticleLT3060-5 ESD rating
Hi all,after working through several datasheets of LDOs by Linear Tech. I discovered that none of them included any data regarding ESD rating or protection. Are LDOs by Linear ESD protected?For...
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