Product Summary

The LB1924 is a direct PWM drive output driver IC appropriate for the power brushless motors used in office automation equipment. It includes a speed control circuit, an FG amplifier, and other peripheral circuits and allows a drive circuit to be implemented with a single IC. It allows the number of external components to be reduced by including a lock protection circuit, a kickback absorption diode for the lower output side, and other components on chip.

Parametrics

LB1924 absolute maximum ratings: (1)Maximum supply voltage 1: 30 V; (2)Maximum supply voltage 2: 30 V; (3)Output current: 3.1 A; (4)Allowable power dissipation: 3 or 20 W; (5)Operating temperature: –20 to +80°C; (6)Storage temperature: –55 to +150°C.

Features

LB1924 features: (1)Breakdown voltage: 30 V, output current: 3.1 A; (2)Direct PWM drive output; (3)Speed discriminator + PLL speed control technique; (4)Crystal oscillator circuit; (5)Built-in FG and integrating amplifiers; (6)Forward/reverse switching circuit; (7)Speed lock detection output; (8)On-chip lower output side kickback absorption diode; (9)Full complement of built-in protection circuits, including lock protection, current limiter, and thermal protection circuits.

Diagrams

LB1924 dimension figure

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