One, a brief introduction
Hand-held juice cup is a machine that can quickly squeeze fruit and vegetables into juice. Variants include: shake juicer, hand-held juicer.
Structure: the whole structure is composed of control board, battery, motor, cutting tool and cup body.
Control board :PCB control board controls motor drive mainly by MOS as energized drive to realize on and off.
Motor: Motor is divided into 3.7V and 7.4V according to the market.
Power battery: single string lithium battery and two string lithium battery.
Two, application instructions
3.7V motor: single series of lithium battery power supply, motor drive using AP60N02D (ID:60A, VDS: 20V, VTH:0.75V)
7.4V motor: two series of lithium battery power supply, motor drive using AP100N03D (ID:100A, VDS: 30V, VTH:1.5V)
VGS on-voltage formula: VGS(complete on-voltage) =VTH(Typ)*3
3. Data analysis
Single battery, 3.7V motor
Two batteries, 7.4V motor
(The above test data only represent the test data obtained by our company in the samples of our customers, not the typical values of all products in the market)
4. Common problems
As the main control unit of the control board is single chip microcomputer, the precision and AD bit of single chip microcomputer are the most critical products. MOS, as a passive device, is subject to single chip microcomputer detection. If the number of AD in the single chip is not enough, the detection will not be in place, and MOS cannot be turned off in time, resulting in the breakdown of MOS current.
Problem 1: MOS often burn out. It may be due to the failure of the single chip microcomputer to turn off the MOS in time, common reasons, the detection resistance accuracy is not enough. The AD bit of the microcontroller is insufficient
Problem 2: MOS often burn out. High internal resistance, EAS ability is weak. The on-voltage is too high. Procedure
Problem 3: Driving motor speed is slow. MOS internal resistance is high. High VTH
Problem 4: The motor starts normally, but it starts by mistake. MOS VTH is low. Since the SCM control logic is a gradual process of ascending, assume that the setting is 1.5V, drive open. Due to low VTH, your command may run 1/3 of the time. MOS has received your signal of low level. MOS has been turned on. That's when it happens, it doesn't match the actual effect.