MC34923EGR2

Freescale Semiconductor, Inc. MOTOROLA Order this document from Analog Marketing: MC34923/D Rev 0, 05/2003 SEMICONDUCTOR TECHNICAL DATA Preliminary Information 34923 Full-Bridge PWM Motor Driver Freescale Semiconductor, Inc... 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. FULL-BRIDGE PWM MOTOR DRIVER 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 DW SUFFIX 24-LEAD SOICW CASE 751E-04 ORDERING INFORMATION Device Temperature Range (TA) Package MC34923DW/R2 -40 to 125°C 24 SOICW 34923 Simplified Application Diagram ≤ 5.0 V 5.0 V 34923 PWMMODE DIR DCMA PWM/ENABLE MCU Serial Port DC Motor CLOCK DATA STROBE DCMB OSC GND This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice. © Motorola, Inc. 2003 For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc. ≤ 45 V Bandgap VDD Thermal Shutdown Undervoltage and Fault Detect OSC (160 kHz) VB VDD CP2 CP1 5.0 V VBB Bandgap Regulator Charge Pump VREG Control Logic DIR PWM/ENABLE OSC CLOCK DATA STROBE DCMA Direction Enable Sync. Rect.Control Internal PWM Mode External PWM Mode Freescale Semiconductor, Inc... PWMMODE Programmable PWM Timer Gate Drive Motor DCMB SENSE Current Sense Serial Port CS Zero Current Detect Fixed-Off Blank Decay Sleep Mode RS Reference Buffer and Divider VREF Load Current Reference SPAN Figure 1. 34923 Simplified Block Diagram 34923 2 MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc. . VB CP2 CP1 DIR OSC GND GND VDD PWM/ENABLE DATA CLOCK STROBE 1 24 2 23 3 22 4 21 5 20 6 19 7 18 8 17 9 16 10 15 11 14 12 13 VREG SPAN NC DCMB VBB GND GND SENSE DCMA NC PWMMODE VREF Freescale Semiconductor, Inc... PIN FUNCTION DESCRIPTION Pin Pin Name Formal Name Definition 1 VB Boost Voltage 2 CP2 Switching Capacitor 2 Charge pump capacitor connection 2. 3 CP1 Switching Capacitor 1 Charge pump capacitor connection 1. 4 DIR Direction Logic-level input for direction control. 5 OSC Oscillator Logic-level oscillator (square wave) input. 6, 7, 18, 19 GND Ground 8 VDD Logic Voltage 9 PWM/ENABLE H-Bridge Enable 10 DATA Serial Data 11 CLOCK Serial Data Clock 12 STROBE Serial Data Latch Strobe Logic-level input for serial port (active on rising edge). 13 VREF Current Limit Reference Voltage Load current reference input voltage. Boost voltage storage node. Ground. Low voltage (typically 5.0 V) logic supply. Logic-level input for enabling the H-bridge driver. Logic-level input for serial interface. Logic-level input for serial port (data is entered on rising edge). 14 PWMMODE PWM Mode Control 15, 22 NC No Connect 16 DCMA H-Bridge Output A 17 SENSE Current Sense 20 VBB H-Bridge Voltage Supply High-current (20 V to 45 V) load supply. 21 DCMB H-Bridge Output B One of two bridge outputs to the motor. 23 SPAN Current Limit Reference Range Logic-level input for VREF range control. 24 VREG Bandgap Voltage MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA Logic-level input for PWM mode control when in internal PWM mode. No internal connection to this pin. One of two bridge outputs to the motor. Sense resistor. Bandgap decoupling capacitor. For More Information On This Product, Go to: www.freescale.com 34923 3 Freescale Semiconductor, Inc. MAXIMUM RATINGS All voltages are with respect to ground unless otherwise noted. Freescale Semiconductor, Inc... Rating Symbol Value Unit Load Supply Voltage VBB 48 V Logic Supply Voltage VDD 7.0 V Input Voltage VIN -0.3 to VDD + 0.3 V Sense Voltage VS 0.5 V Reference Voltage VREF 2.7 V Output Current (Note 1) IOUT ±2.0 A Storage Temperature TS -55 to 150 °C Ambient Temperature TA -20 to 85 °C Operating Junction Temperature TJ -40 to 150 °C Power Dissipation (TA = 25°C) (Note 2) PD 1.6 (Note 3) W VESD1 ±2000 VESD2 ±200 TSOLDER 260 °C RθJA 56 °C/W V ESD Voltage Human Body Model (Note 4) Machine Model (Note 5) Lead Soldering Temperature (Note 6) Thermal Resistance Junction-to-Ambient (Note 2) Notes 1. Output current rating may be limited by duty cycle, ambient temperature, and heatsinking. Under any set of conditions, do not exceed the specified current rating or a junction temperature of 150°C. 2. Maximum power dissipation at indicated ambient temperature in free air with no heatsink used. 3. Per SEMI G42-88 specification. 4. ESD1 testing is performed in accordance with the Human Body Model (CZAP = 100 pF, RZAP = 1500 Ω). 5. ESD2 testing is performed in accordance with the Machine Model (CZAP = 200 pF, RZAP = 0 Ω). 6. Lead soldering temperature limit is for 10 seconds maximum duration. Not designed for immersion soldering. Exceeding these limits may cause malfunction or permanent damage to the device. 34923 4 MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc. STATIC ELECTRICAL CHARACTERISTICS Characteristics noted under conditions TA = 25°C, VBB = 45 V, VDD = 5.0 V, VSENSE = 0.5 V, and fPWM < 50 kHz unless otherwise noted. Characteristic Symbol Min Typ Max Operating 20 – 45 During Sleep Mode 0 – 45 VOUT = VBB –