LB11921T

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 8 10 0.4 0.9 -20 to +80 -55 to +150 Unit V mA W W °C °C Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. ...