Welcome: Chip programmer

A good programmer is very important for R&D and production

As a production tool for mass production, the R&D engineer generally knows very little about it, but it has a significant influence on the output of the production line. If the design of the programmer’s power supply over-current protection, over-voltage protection, etc. is not perfect, the programmer is often damaged, the production line is stagnant, and the loss and impact are difficult to estimate. So choosing a good programmer is very important for R&D and production.
A Chip programmer and a code writer are devices that program firmware generated by a source program onto a target chip. Programmatically divided into onboard programming and die programming.
 Onboard programming: Also known as ICP programming, the chip is soldered to the PCB and then programmed.
 Die programming: Also known as offline programming, the chip place on the fixture for programming, and then the chip soldered to the PCB.
Overcurrent conditions may occur.
Inboard programming:
 During the process of plugging and unplugging the download line, the short circuit caused by the wrong path;
 PCB board has a short course in the production process, and overcurrent will occur when the programmer powers it up;
 There is a large-capacity capacitor on the PCB. The programmer will give the PCB board an instantaneous surge current that is too large, thus triggering the overcurrent protection mechanism.

Die programming:

 When the chip place in the programming block, the short circuit overcurrent occurs when the programmer power on due to chip bias or chip pin skew;

 Remove the chip from the board, and place the tin slag on the chip pin and clean it and put it on the programming block to program, causing the programmer to short-circuit.

If the power supply over-current protection of the programmer is not perfect enough when the chip or the board short-circuit, the programmer may be damaged, and the IC or the circuit board may be damaged, which may cause serious production accidents.

Multi-channel mass production programmers on the market usually only have one overcurrent detection protection circuit, which directly turns off the total power output after detecting the overcurrent of the power supply.

Multi-channel mass production programmers on the market usually only have one overcurrent detection protection circuit, which directly turns off the total power output after detecting the overcurrent of the power supply.

This design can protect to a certain extent, but there are also apparent defects:

 When one of the channels has an overcurrent, the overcurrent protection is triggered, and the power output is turned off, causing other normal channels to be unprogrammed;

 The overcurrent threshold is set very high. When there is only one channel power supply short circuit, the short circuit current may not reach the overcurrent threshold, and the overcurrent protection cannot be triggered, resulting in the corresponding power control circuit of the channel burnt;

 During board programming, if there is a large capacity capacitor on the board, the inrush current is too large at power-on, and the overcurrent protection may be triggered by mistake to turn off the power, causing programming failure.

To completely solve these problems, ZLG Zhiyuan Electronics has reconstructed the over-current detection and protection mechanism of the programmer in the newly introduced P800 series programmers after more than ten years of experience in programming and research and collected feedback from customers in various industries. The core design is overcurrent detection protection on every programming channel.

Scan the qr codeClose
the qr code