an44066a Panasonic Corporation of North America, an44066a Datasheet - Page 27

• Manufacturer Part Number: an44066a
• Description: Driver Ic For Stepping Motor
• Manufacturer: Panasonic Corporation of North America

AN44066A
13. In the case of measuring the chip temperature of the IC, measure the voltage of TJMON (Pin 32) and presume chip temperature
14. Power supply start up speed and shutdown speed
Usage Notes (continued)
from following data. Use the following data as reference data. Before applying the IC to a product, conduct a sufficient reliability
test of the IC along with the evaluation of the product with the IC incorporated.
Set the rising speed to 0.1 V/μs or less for VM voltage at power on to VM (Pin 1, 15).
It is recommended that the falling speed of VM voltage is set to 0.1 V/μs or less on condition of STBY = High or ENABLE = High
at shutdown. In case of shutdown at motor drive (STBY = Low and ENABLE = Low), the motor current might flow back to the
power supply and supply voltage might not fall stably.
If the rising or falling speed of power supply is too high, which might cause malfunctions or destruction on the IC. In this case,
perform the long-term reliability test and confirm the sufficient evaluation for products.
Power Supply
VBE[V]
0
Rising edge every 0.1 V/μs or less
The temperature characteristic of TJMON
ΔVBE / Δtemp = –1.82 [mV / °C]
VM
150
SDL00014AEB
Temp[°C]
Falling edge every 0.1 V/μs or less
time
27