AM Modulation with N-channel and P-channel MOSFETs (marcelomendoza7)
Hi, I have the IC TC7920 (Figure 1) that has Two Pair, N- and P-Channel Enhancement-Mode MOSFET with Drain-Diodes, and the IC TC6320 (Figure 2) tha has a pair of N- and P- MOSFET. These ICs are used to...
View ArticleMCP73853 (ephraimoved)
Dear Sir. I have some problem understanding the flow chart of the MCP73853 .In the PDF some states have the same inputs like preconditioning,constant current,constant voltage .Also I don't understand...
View ArticleOp amp datasheet, max current errors? ambiguities? Many Microchip op amp...
Excuse me, I've noticed an ambiguity/error in the datasheets for your MCP602* MCP629* and MCP600* op amps, it may well affect the datasheets of other microchip op amps too, but I have only had chips of...
View ArticleMIC2179 - Can you adjust the "fixed" versions? (ric)
The MIC2179 is available in 3.3V, 5V and "Adjustable" versions.The adjustable one has a fixed reference of 1.245 volts. Presently they are harder to get than the fixed versions.If I want to generate 8...
View Articlei use MIC3223 to drive leds,input 12V ,OVP was set at 33V ,vout measured is...
i use MIC3223 to dive leds,input 12V from a POE module ,OVP was set at 33V ,measure vout is same as input,whenever the load is open or not,the SW pin seemes no switching wave form. how can i solve it ....
View ArticleLooking for replacement for MCP4921T-E/SN (jcpcb)
Hello, First, I want to apologize if this is not the right subforum. Mods, please feel free to relocate this if I'm way off base? Second, my question. I'm looking for a MCP4921T-E/SN and while I see...
View ArticleADC MCP3561 read out in DMA mode (SUPERTRONIC68)
Has anyone been able to read out the MC3561 in DMA mode? I have this connected to the SPI interface of my DSPIC33EP and currently responding to the interrupt, then need to send a command to read the...
View ArticleMCP39F521 Calibration Accuracy while power line frequency shift (jigowatts)
I am trying to build a single-phase wattmeter using the MCP39F521. According to the datasheet, it seems to maintain high accuracy with single point calibration, but I feel that the error for frequency...
View ArticleLAN8720AI - QFN Package confusion (max25)
Hi, i know its a SMSC-Device. I hope, someone can answer me this anyway. I want to use a LAN8720AI-CP, because it seems to be more common than a LAN8720AI-CP-ABC. I am not able to determine the...
View ArticleHow to exploit the mcp33131 spi/adc at 1 Msps (Sietse)
Hello list,How can I use the MCP33131 ADC at full speed? Note that apart from the SPI signalling CNVST has to be used for each conversion, so has to be precise at 1 MHz.When hoping to use a...
View ArticleMCP6486UT-E/OT, MCP6486RT-E/OT, and MCP6486T-E/OT (RF2222)
you have started to add the "U" and "R" in the part numbers of some parts, but there is nothing written about what that means? can you tell me what that means as the part availability is different for...
View ArticleUSB2642 Support problem (Lucas yin)
Dears, The material USB2642 supports EMMC4.2 according to the specification. Does it support EMMC4.1? Or is it backward compatible? Tks...
View ArticleLogarithmic op-amp values (GrahamRounce)
I need an output of Vout = ln(Vin) + 2.718 , for Vin between 0V and 2.5V. I'm trying to use a standard log amp setup: An MCP601 with a diode for feedback and a resistor R between Vin and the -ve op-amp...
View ArticlePAC1921 with ESP32 problem (MARKODY)
Hello,I've been struggling with one chip few days. I have custom PCB that has ESP32-WROOM-32UE with PAC1921-1-AIA-TR. They are connected together with SCL, SDA and INT pins. SCL and SDA has 10k pull up...
View ArticlePAC1921 with ESP32 problem (MARKODY)
I cant see PAC1921-1-AIA-TR with my ESP32-WROOM-32UE from I2C.SCL and SDA pins has pull up 10k resistors...
View ArticleMicrochip ULPI with ZYNQ (john0bravo)
I am wondering about ULPI 3320 and ULPI 3318 to be usedwith ZYNQ 7020. have checked in their datasheets. The signal interfacing between both ULPI 3320 and ULPI 3318 and the ZYNQ 7020 having ARMCoretex...
View ArticleUSB5734 SMBus configuration with FlexConnect Pin Control issue (loicbflya)
Hi, We are using the Microchip USB5734 USB HUB controller in one of our designs and are trying to swap the host role port from Port0 to Port1 (and vice versa) using the HUB's FlexConnect feature. In...
View ArticleATM90E32AS ADC Input Range inconsistency (rodrigofructuoso)
Hi there, Reading the datasheet and an application note for the ATM90E32AS I've found an inconsistency and would like to know what is the correct information. According to those documents, the Channel...
View ArticleTo generate dual output pulse from two wires transformer (HighTechPower)
Hi. I want to design a transformer power supply circuit which takes 220 VAC as input and produce 12 VAC output. The hard part is the transformer has only two wires as secondary instead of three. As...
View ArticleUSB-C - Best Microchip DC/DC converter/regulator for powering monitoring...
Hi, I am designing a power monitoring circuit for USB-C power delivery similar to the Microchip demo product ADM00921, which is a device which sits in series with the USB-C line and leaches a bit of...
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