LB8502M Datasheet, PDF (1/11 Pages) Sanyo Semicon Device – Monolithic Digital IC DC Fan Motor Speed Control IC

Ordering number : EN8337
LB8502M
Monolithic Digital IC
DC Fan Motor Speed
Control IC
Overview
The LB8502M easily and simply implements feedback-based motor speed control in combination with a general-purpose
motor driver IC.
Compared to open-loop control, the use of speed feedback allows the motor speed precision to be improved and the speed
fluctuations due to load variations to be minimized.
• LB8502M: For use as a driver IC that increases the motor speed as the command voltage rises (three-phase systems)
Features
• Achieves linear speed control
Applications can set the slope of the change in motor speed with change in the input duty.
• Minimized speed fluctuations in the presence of line or load variations
• Allows a minimum speed to be set
• Soft start function
• Settings using external capacitors and resistors (to support easier mass production of end products)
• Supports both PWM duty and analog voltage control inputs
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Supply voltage
Output current
Allowable power dissipation
VCC max
IO max
Pd max
VCC pin
E0 pin
When mounted on a circuit board *¹
Operating temperature
Topr
Storage temperature
Tstg
*1 Specified circuit board : 114.3 × 76.1 × 1.6mm³, glass epoxy.
Ratings
Unit
18
V
3
mA
0.87
W
-30 to +95
°C
-55 to +150
°C
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the performance, characteristics, and functions of the described products in the independent state, and are not
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equipment.
32807 TI PC B8-8968 No.8337-1/11