The U209B is a phase-control integrated circuit designed for motor speed control with tacho feedback. It features an internal frequency-to-voltage converter, externally controlled integrated amplifier, automatic soft start, voltage and current synchronization, retriggering, and more.
The Atmel U209B is an integrated circuit designed as a phase-control circuit in bipolar technology. It features an internal frequency-to-voltage converter and an externally controlled amplifier, making it suitable for sophisticated motor control systems with tacho feedback.
This document provides detailed descriptions of the chip's operation, including mains supply design, phase control logic, voltage monitoring, soft start mechanisms, and automatic retriggering capabilities.
| Triggering pulse current | typ. 155 mA |
|---|---|
| Current requirement | <3 mA |
| Supply voltage limitation (Is = 3mA) | 14.6 V to 16.6 V |
| DC supply current | 2.5 mA to 3.0 mA |
| Reference voltage (I, = 10 pA) | 8.6 V to 9.2 V |
| Power dissipation (Tamb = 45°C) | 570 mW |
The typical triggering pulse current is 155 mA.
Yes, it is designed with voltage limiting and can be supplied directly from the mains.
The control signal on Pin 11 can be in the range of 0 V to -7 V.