CHA Datasheet – SIP 8 Pin, uPCHA, Protector IC – NEC, uPCHA datasheet, CHA pdf, CHA pinout, CHA manual. CHA Datasheet PDF Download – UPC, CHA data sheet. Work as either latching function or automatic resetting function by using pin 3. (In both overload detection and output offset detection, either function can be.

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Thanks for posting such a nice speaker protection with really high class chip. However all you need is to monitor the current flow trough one of c1237hs emitter resistors at the output of the power amplifier. The mounting pads are of 15mm diameter.

The buyer is responsible for any tax or duty charged on their country. The maximum allowed is 60VDC. Hi Ventsislav, Great article about a very usefull item which no one ever hopes to use. The supplier supports Trade Assurance — A free service that protects your orders from payment to delivery.

Gold Plus Supplier The supplier supports Trade Assurance — A free service that protects your orders from payment to delivery. Thanks for your help. Hi, some of the resistor values depend on the supply voltage.

CHA NEC [NEC], CHA Datasheet

I am wondering if this works for you Ventsislav? However those were using small current relays not suitable for more powerful amplifiers. The devices protected by this module can be quite expensive so no cheap tricks here. Contact For Free Shipping. A wide variety of new original cha options are available to you, such as drive ic, voltage regulator, and logic ics. Any commercial usage is prohibited. The relay is located between the datasgeet pads to keep the paths equal and at the same length.


Because not all of them are written in he schematic? It was in fact used in many industry amplifiers.

This site uses Akismet to reduce spam. There is a solution around this however, if you can provide a low power auxiliary voltage of about 18VAC.

Upc Speaker Protection Board. Hello Simonov, I am wonderig how did you compute resistors for first schematic over current protection? Those can be drilled to a larger diameter if necessary. Now I wanted to have a rather non standard approach here. There are 54 new original cha suppliers, mainly located in Asia. Great article about a very usefull item which no one ever hopes to use. The mounting holes are datssheet 5.

Using a current source will require the pin 1 driven with current above uA. Leave a Reply Cancel reply Your email address will dxtasheet be published.

But can you write all resistor values? Almost any Sony amplifier starting from the lower range and right up to the higher-end ES series are using this chip.

Skip to content Skip to primary sidebar Skip to footer. My speaker terminals have 5mm threads and fit just fine. Hello Ventsislav greetings please can you share schematic even if low voltage one warm regards andrew.


CHA new original electronics component ic. As we are professional teamyou will get more quality products and service in long term cooperation! Rising the voltage above 0. This part of the schematic is forcing the current to stay within the recommended SOA of the devices. Integrated Circuits Ic Price.

This is the threshold. Supplier Types Trade Assurance. Relevancy Transaction Level Response Rate. Upcha Integrated Circuit Ic. However, reliability is more important than the cost of the Dattasheet. Hello Ventsislav datasbeet very kind of you for replying i can provide the low power auxiliary 18 volt ac for a long time i have been searching for a short circuit protection schematic little help from you and i can make it from schematic i can design the pcb please schematic if you can share warm ratasheet andrew.

Those can be quite bulky so the PCB is quite large. It can be downloaded HERE.

C1237HA Datasheet

Hi, the circuit does work. There is no built-in circuit either.

A few words about the PCB. Many brands use uPC Using uPC for over current protection allows the designer to drop the SOA limiting elements in the power amplifier.