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MC34923DWR2 데이터시트(PDF) 1 Page - Freescale Semiconductor, Inc |
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MC34923DWR2 데이터시트(HTML) 1 Page - Freescale Semiconductor, Inc |
1 / 16 page MOTOROLA SEMICONDUCTOR TECHNICAL DATA 34923 Simplified Application Diagram This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice. © Motorola, Inc. 2003 Order this document from Analog Marketing: MC34923/D Rev 0, 05/2003 34923 Preliminary Information ORDERING INFORMATION Device Temperature Range (TA) Package MC34923DW/R2 -40 to 125°C 24 SOICW Full-Bridge PWM Motor Driver Designed with Motorola’s advanced SMARTMOS, the 34923 is designed for pulse-width modulated (PWM) current control of DC motors. It is capable of continuous output currents up to 2.0 A and operating voltages of up to 45 V. Internal fixed off-time PWM current-control timing circuitry can be programmed via a serial interface to operate in slow, fast, and mixed current-decay modes. DIR and PWM/ENABLE input pins are provided for use in controlling the speed and direction of a DC motor with externally applied PWM-control signals. The PWM/ENABLE input can be programmed via the serial port to PWM the bridge in fast or slow current decay. Internal synchronous rectification control circuitry is provided to reduce power dissipation during PWM operation. Internal circuit protection includes thermal shutdown with hysteresis and crossover-current protection. A special power-up sequencing is not required. Features • ±2.0 A, 45 V Continuous Output Rating • Low RDS(ON) Outputs (270 mΩ, typical) • Programmable Mixed, Fast, and Slow Current-Decay Modes • Serial Interface Controls Chip Functions • Synchronous Rectification for Low Power Dissipation • Internal Undervoltage Lockout Thermal Shutdown Circuitry • Crossover-Current Protection FULL-BRIDGE PWM MOTOR DRIVER DW SUFFIX 24-LEAD SOICW CASE 751E-04 34923 5.0 V ≤ 5.0 V Serial Port CLOCK DATA STROBE PWMMODE DIR PWM/ENABLE OSC MCU DCMA DCMB Motor DC GND Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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