LB11921T Datasheet, PDF (1/18 Pages) Sanyo Semicon Device – Monolithic Digital IC Three-Phase Brushless Motor Driver

Ordering number : ENA0604
LB11921T
Monolithic Digital IC
Three-Phase Brushless Motor Driver
http://onsemi.com
Overview
The LB11921T is a pre-driver IC designed for variable-speed control of 3-phase brushless motors. It can be used to
implement a motor drive circuit with the desired output capacity (voltage, current) by using discrete transistors for
the output stage. It implements direct PWM drive for minimal power loss. Since the LB11921T includes a built-in
VCO circuit, applications can control the motor speed arbitrarily by varying the external clock frequency.
Functions
• Direct PWM drive output
• Speed discriminator + PLL speed control circuit
• Speed lock detection output
• Built-in VCO circuit
• Forward/reverse switching circuit
• Braking circuit (short braking)
• Full complement of on-chip protection circuits, including lock protection, current limiter, and thermal shutdown
protection circuits.
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Output current
Allowable power dissipation 1
Symbol
VCC max
IO max
Pd max1
Conditions
UH, VH, WH, UL, VL, WL output
Independent IC
Allowable power dissipation 2
Pd max2
Mounted on a circuit board*
Operating temperature
Topr
Storage temperature
Tstg
* Mounted on a specified board: 114.3mm×76.1mm×1.6mm, glass epoxy.
Ratings
Unit
8
V
10 mA
0.4
W
0.9
W
-20 to +80
°C
-55 to +150
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Semiconductor Components Industries, LLC, 2013
May, 2013
11707 MS IM 20060327-S00010 No.A0604-1/18