Automatic BGA IC Reballing

                                                                      Automatic Optical BGA IC Reballing Machine 

1.Application Of Automatic Optical BGA IC Reballing Machine

Work with all kinds of motherboards or PCBA.

Solder, reball, desoldering different kind of chips: BGA,PGA,POP,BQFP,QFN,SOT223,PLCC,TQFP,TDFN,TSOP, 

PBGA,CPGA,LED chip.

 

2.Product Features of Automatic Optical BGA IC Reballing Machine

 

3.Specification of Automatic Optical BGA IC Reballing Machine

4.Details of Automatic Optical BGA IC Reballing Machine

 

5.Why Choose Our Automatic Optical BGA IC Reballing Machine? 

 

6.Certificate of Automatic Optical BGA IC Reballing Machine

UL, E-MARK, CCC, FCC, CE ROHS certificates. Meanwhile, to improve and perfect the quality system, 

Dinghua has passed ISO, GMP, FCCA, C-TPAT on-site audit certification.

 

7.Packing & Shipment of Automatic Optical BGA IC Reballing Machine

 

 

8.Shipment for Automatic Optical BGA IC Reballing Machine

DHL/TNT/FEDEX. If you want other shipping term, please tell us. We will support you.

 

9. Terms of Payment

Bank transfer, Western Union, Credit Card.

Please tell us if you need other support. 

 

10. How DH-A2 Automatic BGA IC Reballing Machine work?

 

 

 

11. Related knowledge

About flash chip

Flash chip determinants

Number of pages

As mentioned earlier, the larger the page of the larger capacity flash, the larger the page, the longer the addressing time.

But the extension of this time is not a linear relationship, but a step by step. For example, a 128, 256 Mb chip requires 3

cycles to transmit an address signal, 512 Mb, 1 Gb requires 4 cycles, and 2, 4 Gb requires 5 cycles.

Page capacity

The capacity of each page determines the amount of data that can be transferred at a time, so a large-capacity page has

better performance. As mentioned earlier, large-capacity flash (4Gb) increases the page capacity from 512 bytes to 2KB.

The increase in page capacity not only makes it easier to increase the capacity, but also improves the transmission performance.

We can give an example. Take Samsung K9K1G08U0M and K9K4G08U0M as examples. The former is 1Gb, 512-byte page capacity,

random read (stable) time is 12μs, write time is 200μs; the latter is 4Gb, 2KB page capacity, random read (stability) time 25μs, write

time It is 300μs. Suppose they work at 20MHz.

Read performance: The read steps of NAND flash memory are divided into: send command and addressing information → transfer

data to page register (random read stable time) → data transfer (8bit per cycle, need to transmit 512+16 or 2K+ 64 times).

K9K1G08U0M read a page needs: 5 commands, addressing cycle × 50ns + 12μs + (512 + 16) × 50ns = 38.7μs; K9K1G08U0M actual

read transfer rate: 512 bytes ÷ 38.7μs = 13.2MB / s; K9K4G08U0M read a page Requires: 6 commands, addressing period × 50ns +

25μs + (2K + 64) × 50ns = 131.1μs; K9K4G08U0M actual read transfer rate: 2KB bytes ÷ 131.1μs = 15.6MB / s. Therefore, using a

2KB page capacity to 512 bytes also increases the read performance by about 20%.

Write performance: The write steps of the NAND flash memory are divided into: sending addressing information → transferring data

to the page register → sending command information → data is written from the register to the page. The command cycle is also one.

We will merge it with the address cycle below, but the two parts are not continuous.

K9K1G08U0M writes a page: 5 commands, addressing period × 50ns + (512 + 16) × 50ns + 200μs = 226.7μs. K9K1G08U0M actual

write transfer rate: 512 bytes ÷ 226.7μs = 2.2MB / s. K9K4G08U0M writes a page: 6 commands, addressing period × 50ns + (2K + 64)

× 50ns + 300μs = 405.9μs. K9K4G08U0M actual write transfer rate: 2112 bytes / 405.9 μs = 5MB / s. Therefore, using 2KB page capacity

increases write performance by more than twice the 512-byte page capacity.

Block capacity

The block is the basic unit of the erase operation. Since the erase time of each block is almost the same (the erase operation generally takes

2ms, and the time occupied by the command and address information of several previous cycles is negligible), the capacity of the block will

be directly determined. Erase performance. The page capacity of the large-capacity NAND-type flash memory is increased, and the number

of pages per block is also improved. Generally, the block capacity of the 4Gb chip is 2 KB × 64 pages = 128 KB, and the 1 Gb chip is 512 bytes

× 32 pages = 16 KB. It can be seen that within the same time, the former's rubbing speed is 8 times that of the latter!

I/O bit width

In the past, the data lines of NAND-type flash memories were generally eight, but from the 256Mb products, there were 16 data lines. However,

due to controllers and other reasons, the actual application of x16 chips is relatively small, but the number will continue to increase in the future

. Although the x16 chip still uses 8-bit groups when transmitting data and address information, the cycle is unchanged, but the data is transmitted

in 16-bit groups and the bandwidth is doubled. The K9K4G16U0M is a typical 64M×16 chip, which is still 2KB per page, but the structure is (1K+32)×16bit.

Imitate the above calculations, we get the following. K9K4G16U0M needs to read one page: 6 commands, addressing period × 50ns + 25μs +

(1K + 32) × 50ns = 78.1μs. K9K4G16U0M actual read transfer rate: 2KB bytes ÷ 78.1μs = 26.2MB / s. K9K4G16U0M writes a page: 6 commands,

addressing period × 50ns + (1K + 32) × 50ns + 300μs = 353.1μs. K9K4G16U0M actual write transfer rate: 2KB bytes ÷ 353.1μs = 5.8MB / s

It can be seen that with the same capacity of the chip, after the data line is increased to 16 lines, the read performance is improved by nearly 70%,

and the write performance is also improved by 16%.

frequency.The impact of the working frequency is easy to understand. The operating frequency of NAND flash memory is 20 to 33 MHz, and the higher

the frequency, the better the performance. In the case of K9K4G08U0M, we assume that the frequency is 20MHz. If we double the frequency to 40MHz,

then K9K4G08U0M needs to read one page: 6 commands, addressing period × 25ns + 25μs + (2K + 64) × 25ns = 78μs. K9K4G08U0M actual read transfer rate:

2KB bytes ÷78μs=26.3MB/s. It can be seen that if the operating frequency of the K9K4G08U0M is increased from 20MHz to 40MHz, the read performance can

be improved by nearly 70%! Of course, the above example is just for convenience. In Samsung's actual product line, the K9XXG08UXM, rather than the K9XXG08U0M,

can work at higher frequencies. The former can reach 33MHz.