What types of chips are on the Antminer V1.413 version L3+ hash board?

Antminer is a relatively old miner. The chips on its hash board are almost the same as those on other hash boards, but there are also minor differences. What chips are on the L3+ hash board? The article takes the V1.413 version of the hash board as an example to explain the location and use of a chip on the hash board. Let's learn about it together!

BM1485 ASIC chip

Antminer L3+ is one of the few miners with 4 built-in hash boards. A single hash board has 72 BM1485 ASIC chips, and the whole miner has 288 chips. Each chip has an independent small heat sink on the back. After the initial test of the board, the small heat sink on the back is fixed on the back of the IC with a thermosetting adhesive. After the repair and replacement of the chip has passed the test, it is necessary to apply the thermosetting adhesive evenly on the surface of the IC and heat it to fix it.

U111: SGM3570

The SGM3750 is a 650kHz boost converter for driving series LEDs. The chip adopts green TDFN-2×2-6L packaging technology; the operating temperature range is between -40°C to +85°C, and the operating voltage is between 2.7V and 20V. In addition, the chip has built-in LED open circuit protection, which can effectively prevent the chip from being damaged due to overvoltage under an LED open circuit.

Q1: TPHR9003NL

The MOS chip TPHR9003NL is mainly used to check the voltage output in the voltage domain. By measuring the output of the power supply terminal of the hash board, it can judge whether the MOS is short-circuited. Under normal circumstances, the voltage is unstable, and the lightning surge will cause damage to the MOS.

U74: PIC16F1704

PIC16F1704 is a 14-pin 8-bit microcontroller, mainly used to check PIC circuits. When the PIC pin voltage does not reach the standard value, you can re-program the PIC by checking whether the connection between the test fixture cable and the Hash board is normal.

U88: T451 temperature sensor chip

The T451 temperature sensor chip adopts WSON-8 packaging technology and is mainly used to sense the temperature of the hash board. If the temperature sensor chip is damaged, it will cause abnormal temperature readings, the hash board will not start when the temperature is too low, or the miner will stop running when it is too high.

U84: G49IC

G49IC 1.8V is a voltage domain voltage regulator chip. It adopts SOT23-5 needle tube packaging technology. It is mainly used for the maintenance of the Antminer L3+ hash board.

U83: 4VK4

According to the analysis of the maintenance personnel, by replacing the faulty M4JD chip with the working 4VK4, the hash board can work normally. Therefore, we can speculate that M4JD and 4VK4 have the same function; both are voltage regulators, the output voltage is between 1.0V~5.0V, and the maximum output current is 300mA.

Antminer L3+ hash board chip summary: