JY02A sensorless brushless DC motor control IC

JY02A is ASIC for sensorless brushless DC motor , with simple peripheral circuit, perfect function, compact size, simple debugging (almost no debugging), high drive efficiency, flexible application, widely application, etc.
JY02A is a pure hardware application IC, which solve the trouble of writing programs. JY02A internally solidifies various sensorless brushless DC motor drive control circuits, such as adaptive start circuit, power compensation circuit,Q value correction circuit, power factor correction, Phase detection circuit, bidirectional operation decoding circuit,locked-rotor protection circuit, back electromotive force detection circuit, current detection & control circuit, voltage detection & protection circuit, etc., after a very few amount of external component adjustment, can drive various sensorless brushless DC motor, JY02A has a certain load-starting capability, which is very important in most applications.

JY02A can be applied to three-phase DC brushless motor with "Y" and "triangle" connection.
Applications: sweeping robots, automotive water pumps, wall-hung boiler circulation pumps, home booster pumps,oxygen generators, various fans/blowers, electric screwdrivers, electric curtains, automatic doors, hydraulic oil pumps,high pressure air pumps, automotive air conditioning compressors , DC brushless compressor, AGV trolley, various linear and loop logistics sorting equipment, lawn mower, sprayer, underwater propeller, etc.

Functional characteristics:
☆Working voltage: 4.5 v-5.5 V. ☆Working temperature: -55-125 ℃
☆Drive mode: SPWM ☆Adaptive motor: Sensorless BLDC motor
☆Direction control: CW/CCW ☆Soft reversing: Yes
☆Speed signal: Yes ☆Overload protection: Yes
☆Current closed loop: Yes ☆Constant current drive: Yes
☆Blocking protection: Yes ☆Starting torque regulation: Yes
☆Soft starting: Yes ☆Special technology: JYKJ full condition safety start function
☆Speed adjustment: linear ☆EAI self-adaptation function

PIN NAME FUNCTION REMARK
1 EMFC BEMF detection input port C
Connect after W phase partial pressure, pay attention
to withstand voltage range
2 VR speed governing 0-5V analog input
3 VOD voltage detection OV value:3.6V,LV value:0.8V
4 GND GND 0V
5 VDD 5V 4.5V--5.5V
6 Is current detection Current feedback signal input
7 EMF_ON EMF signal output EMF regulation control
8 TC Temperature detecting port
Protection: above 4.53V
Protection remove: under 3.70V
9 QD
Starting torque
adjustment:0-2.5V
0--60%
10 UH U phase top drive output U phase top drive PWM output 13KHz
11 UL U phase bottom drive output U phase bottom drive commutation signal output
12 VH V phase top drive output V phase top drive PWM output 13KHz
13 VL V phase bottom drive output V phase bottom drive commutation signal output
14 WH W phase top drive output W phase top drive PWM output 13KHz
15 WL W phase bottom drive output W phase bottom drive commutation signal output
16 Z/F CW and CCW rotation control H: forward / L :Reverse
17 M Speed pulse output One pulse per commutation
18 EMF BEMF common terminal
19 EMFA BEMF detection input port A
Connect after U phase partial pressure, pay attention
to withstand voltage range
20 EMFB BEMF detection input port B
Connect after V phase partial pressure, pay attention
to withstand voltage range

JY02A Drive mode and parameters:

1:UH/VH/WH phase top drive PWM output,UL/VL/WL phase bottom drive commutation signal
output, this drive mode is a economic way to reduce the costs of hardware, especially in
application of high voltage and high-power motor drivers. top drive PWM output mode is
more easier circuit and higher stability than bottom drive PWM output mode.
2:The PWM frequency of JY02A is 13KHz, which not only takes into account the comprehensive
ratio of efficiency and noise, but also increases the power and reduces the power consumption
of the driving circuit . The torque of the motor is higher than that of 20KHz under the same
power supply.
Pulse of JY02A
Please take a note that JY02A output one pulse signal during the BLDC motor commutating
phase each time. It means JY02A not produce one pulse when the motor turn a round. For
example as following schematic diagram: its an inner rotor, 2 pairs pole motor, it means the
motor needs commutating phase for 6 times for each round, so JY02A will output 6 pulses each
motor round

Functional description and application considerations
a) Overload protection and current sampling resistance value selection:
JY02A has a relatively complete overload protection function. the overload protection
and current abnormal protection function of JY02A will take effect only under the
condition of the current sampling resistor R is selected properly. When the Is pin voltage
reaches 0.40mV, the overload monitoring starts and enter into constant current state and
keeps the driving current constant. At this state, the driving current no longer rises with
the voltage of the VR pin, and will not increase with the increase of the load. In this state,
JY02A will continue to provide a constant power for the motor and keeps the motor in
normal working state. If the Is pin voltage reaches or exceeds 90mV, the system will judge
all the outputs within 4.5 microseconds.
Here is a detailed example how to select properly R value as follow:
R value formula: I = 0.04/R
I: Constant current setting value, unit: A
0.04: is the voltage value of Is pin of JY02A
R: current limiting resistance, unit: Ohm
For example, a controller with an operating current of 3A , set the constant current to
5A for safety, and the system keep the current at 5A when the current reaches or exceeds
5A, after the formula I = 0.04 /R, R=0.04/I so R value = 0.04 / 5=0.008 Ohm, so the
current sampling resistor should use a power resistor of 8 milliohms (current sampling
resistor normally is cement resistor and constantan wire)
b) locked-rotor protection: JY02A has automatic restart function. Once the running motor is
blocked by external force, the system will automatically protect and restart. If the restart
is unsuccessful for 10 times, it will automatically stop output. Disconnect the power or
reduce the voltage of the VR pin to 0V to unlock the protection. Increase the VR voltage
to restart the motor.

c) Z/F soft reversing:The 16th pin Z/F of JY02A is the reversing control pin. This pin can be
connected to 5V or GND. JY02A has soft reversing function. This function protects the
MOSFET and motor in many applications, and improves the reliability and service life, the
specific operation is that when the motor is rotating in one direction, when the Z/F
voltage level changes, the driver stops output first, the motor rotates freely till stop, and
then starts to run in the other direction.
d) FG speed signal feedback:JY02A also outputs the speed pulse signal while driving the motor.
JY02A will output one pulse every phase commutating. This is perfectly reflected in high-end
applications. In the case of precise speed control, such as DC brushless fan, DC Brushless pumps,
etc.,
With the speed signal feedback, these functions are easy to achieve, Such as require stable
speed and stable torque, and closed-loop control solution.
e) TC Temperature protection port:JY02A has an external connect temperature protection function.
The application is quite simple, only an external NTC and a resistor are required, can place the
NTC in the place where need be monitored, such as MOSFET or motor. When the temperature
reaches a certain value, the system will automatically protect, the system will restart after the
temperature down to safety value. it is recommended parameters of NTC: NTC of 10K3950K,
divider resistor with 10K 1%, according to this parameter, the temperature will automatically
protect when the temperature reaches 100 degrees, of course, you can also replace other
models NTC or adjust divider resistor according to the actual application. The value of the
resistor reaches the temperature value that you want to protect.
f) QD Starting torque adjustment:By adjusting the voltage of the QD terminal, the starting torque can be
directly changed. The voltage adjustment range is 0V-2.5V, and the normal motor starting torque
voltage is between 0V - 0.8V (the starting torque is not as bigger as better)
Summary:
There are many factors affecting the DC brushless Hallless motor driver, such as the working voltage,
speed, commutation angle, load, inductance, back EMF, starting load, etc., which will affect the DC
brushless motor drive performance. The driving effect of the motor, so more testing are required to
make a perfect high-efficiency, stable DC brushless sensorless motor driver .
Declaration:
In order to improve the performance of DC brushless sensorless motor driver, reduce the volume, reduce the
production and development costs, JY02A is our the second DC brushless sensroless motor driver IC that does not
require an external comparator. JY02A integrates all the circuits of DC brushless sensorless motor driver
(excluding power components). In order to better service to our customers, we offer three JY02 typical
application circuits for reference. We will continue to improve its performance according to market applications.,
actual IC function may be slightly different from the introduction of this article, if you have any problems in the
application, you can contact us for the latest information.

DOWNLOAD JY02A USER MANUAL

JY02A_V2_20180530-English.pdf