Overview

The STK6217 is a hybrid IC that combines in a single package a unidirectional DC motor driver, a PLL constant-speed controller (the LC7991) and associated peripheral components, including a separately excited oscillator, a comparator, and an FG amplifier. The motor controller uses a PLL circuit for precise motor control.

Features



• High FG frequency upper limit (locking range: 200 to 2500 Hz)

• Built-in FG divider (FG lock upper limit with divider in use: 5000 Hz)

• Speed lock indicator output directly drives an external LED.

• TTL level compatible ROT input



• MOSFET power elements provide high output currents (rush current).

• Low-loss PWM speed controller (built-in externally excited oscillator: 25 kHz)

• Wide power supply voltage range (VDSS= 60 V)

• Built-in motor start-up overcurrent limiter function

Applications

• Plain paper copier DC motor drivers

• FAX paper transport motor drivers

• Other DC motor applications