34923

Freescale Semiconductor, Inc. MOTOROLA SEMICONDUCTOR TECHNICAL DATA Order this document from Analog Marketing: MC34923/D Rev 0, 05/2003 Preliminary Information 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 34923 FULL-BRIDGE PWM MOTOR DRIVER Freescale Semiconductor, Inc... DW SUFFIX 24-LEAD SOICW CASE 751E-04 ORDERING INFORMATION Device MC34923DW/R2 Temperature Range (TA) -40 to 125°C Package 24 SOICW 34923 Simplified Application Diagram 5.0 V 34923 ≤ 5.0 V PWMMODE DIR DCMA PWM/ENABLE MCU Serial Port CLOCK DATA STROBE OSC GND DCMB DC Motor 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 5.0 V CP1 CP2 VDD Bandgap VDD Thermal Shutdown Undervoltage and Fault Detect OSC (160 kHz) VB VBB Bandgap Regulator VREG Charge Pump Control Logic PWMMODE Direction Enable Sync. Rect.Control Internal PWM Mode External PWM Mode DCMA Gate Drive DCMB SENSE Zero Current Detect Freescale Semiconductor, Inc... DIR PWM/ENABLE Motor CS RS OSC Programmable PWM Timer Fixed-Off Blank Decay Current Sense CLOCK DATA STROBE SPAN Serial Port Sleep Mode Reference Buffer and Divider VREF Load Current Reference Figure 1. 34923 Simplified Block Diagram 34923 2 For More Information On This Product, Go to: www.freescale.com MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA Freescale Semiconductor, Inc. . VB CP2 CP1 DIR OSC GND GND VDD PWM/ENABLE DATA CLOCK STROBE 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 VREG SPAN NC DCMB VBB GND GND SENSE DCMA NC PWMMODE VREF PIN FUNCTION DESCRIPTION Freescale Semiconductor, Inc... Pin 1 2 3 4 5 6, 7, 18, 19 8 9 10 11 12 13 14 15, 22 16 17 20 21 23 24 Pin Name VB CP2 CP1 DIR OSC GND VDD PWM/ENABLE DATA CLOCK STROBE VREF PWMMODE NC DCMA SENSE VBB DCMB SPAN VREG Formal Name Boost Voltage Switching Capacitor 2 Switching Capacitor 1 Direction Oscillator Ground Logic Voltage H-Bridge Enable Serial Data Serial Data Clock Serial Data Latch Strobe Current Limit Reference Voltage PWM Mode Control No Connect H-Bridge Output A Current Sense H-Bridge Voltage Supply H-Bridge Output B Current Limit Reference Range Bandgap Voltage Boost voltage storage node. Definition Charge pump capacitor connection 2. Charge pump capacitor connection 1. Logic-level input for direction control. Logic-level oscillator (square wave) input. 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). Logic-level input for serial port (active on rising edge). Load current reference input voltage. 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. High-current (20 V to 45 V) load supply. One of two bridge outputs to the motor. Logic-level input for VREF range control. Bandgap decoupling capacitor. MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA 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. Rating Load Supply Voltage Logic Supply Voltage Input Voltage Sense Voltage Reference Voltage Output Current (Note 1) Storage Temperature Symbol VBB VDD VIN VS VREF IOUT TS TA TJ PD Value 48 7.0 -0.3 to VDD + 0.3 0.5 2.7 ±2.0 -55 to 150 -20 to 85 -40 to 150 1.6 (Note 3) Unit V V V V V A °C °C °C W V VESD1 VESD2 TSOLDER RθJA ±2000 ±200 260 56 °C °C/W Freescale Semiconductor, Inc... Ambient Temperature Operating Junction Temperature Power Dissipation (TA = 25°C) (Note 2) 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. 6. ESD2 testing is performed in accordance with the Machine Model (CZAP = 200 pF, RZAP = 0 Ω). 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 For More Information On This Product, Go to: www.freescale.com MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA 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 Unit OUTPUT DRIVERS Load Supply Voltage Range Operating During Sleep Mode Output Leakage Current VOUT = VBB VOUT = 0 V IDSS – – RDS(ON) – – – – VF – – IBB – – – 4.0 2.0 – 7.0 5.0 20 mA mA 1.2 1.2 1.6 1.6 300 – 300 – 450 700 450 700 V