Ordering number : ENN6087A
Monolithic Digital IC
LB1975
DC Fan Motor Driver
Overview
The LB1975 is a three-phase brushless motor driver IC suited for use in direct PWM driving of DC fan motors for air conditioners, water heaters, and other similar equipment.
Since a shunt
regulator circuit is built in, single power supply operation sharing the same power supply for the motor is supported.
Package Dimensions
unit: mm 3147C-DIP28H
[LB1975]
28 15
Features
• • • • • Withstand voltage 45 V, output current 2.
5 A Direct PWM drive output 3 built-in output top-side diodes Built-in current limiter Built-in FG output circuit
R1.
7
12.
7 11.
2
8.
4
1
20.
0 26.
75
14
(1.
81)
1.
78
0.
6
1.
0
4.
0
4.
...