34921

Freescale Semiconductor Technical Data MC34921 Rev 5.0, 07/2005 Configurable Motor Driver IC with Power Supplies The 34921 power IC integrates multiple motor drivers, multiple power regulators, and most other analog functions a small consumer motion-enabled product needs. The 34921’s circuitry is fully protected with current limiting, short-circuit shutdown, over-temperature, overvoltage, and under-voltage detection. Supervisory functions can be read and programmed through a 8-MHz Serial Interface. A 5.0 V dual-mode (linear or switching) voltage regulator, 3.3 V switching buck regulator, and a voltage-selectable (1.5 V, 1.8 V, 2.5 V) linear regulator provide power management. Two H-Bridges and a configurable motor driver are provided for controlling two dc motors and one unipolar stepper motor. The highly integrated 34921 brings together sensing, communication, power management, system protection, and motor control in one device. Features • Two Functionally Identical Pulse-Width Modulated (PWM) DC Motor Drivers • One Switching, One Linear, and One Dual-Mode Regulator • Dual Mode Switching/Linear 5.0 V Regulator • Supervisory Functions (Power-ON Reset and Error Reset Circuitry) • 8-Channel, 8-Bit Analog-to-Digital Converter (ADC) • Charge Pump for High-Side MOSFET Drive • Complete Support for • Analog Quadrature Encoder • Pb-Free package is designated by suffix AE 5.0 V / 3.3 V Serial MCU Ports A/D 34921 H-BRIDGE MOTOR DRIVER AND POWER SUPPLY AE SUFFIX (Pb-Free) 98ARH98426A 64-LEAD LQFP-EP ORDERING INFORMATION Device MC34921AE/R2 Temperature Range (TA) 0°C to 70°C Package 64 LQFP-EP 34921 MISO MOSI SCLK CE AN0 B+ B+ High-Side MOSFET GATEOUT 5.0 V 3.3 V VCORE ADCMA Inputs A B+ B Step Motor C A B+ AN3 SA/CDCMA SB/LSOUT1 CPWMA CPWMB APWM ADCMB BDCMA BPWM BDCMB GND DC Motor B DC Motor A B SB/LSOUT2 SA/CDCMB DGND Figure 1. 34921 Simplified Application Diagram *This document contains information on a product under development. Specifications and information herein are subject to change without notice. © Freescale Semiconductor, Inc., 2005. All rights reserved. INTERNAL BLOCK DIAGRAM INTERNAL BLOCK DIAGRAM B+ CP1 CP2 VBOOST 5 V SELECT 5 V SWITCH 5 V SUPPLY 5V B+ 5.0 V Dual Mode Regulator Charge Pump Gate Voltage Generator Thermal Shutdown B+ BPWM 3.3 V SWITCH BDCMA 3.3 V 3.3 V Switching Regulator Oscillator VCORE SUPPLY VCORE VCORE SELECT ENC_FILTB ENC_FILTA VCORE Linear Regulator Motor Driver B B+ BDCMB APWM I/V Converter ADCMA AN3/ANALOGIN_B AN2/ANALOGIN_A AN1/ANALOGOUT_B AN0/ANALOGOUT_A MISO MOSI SCLK CE A/D Converter and Multiplexer Motor Driver A ADCMB SA/CDCMA SA /CDCMB Active Clamp Serial I/O Step Motor Driver SB/LSOUT1 SB/LSOUT2 CPWMA/CDCPWM CPWMB SS DC Motor Driver GATEOUT Gate Driver RST Supervisor Circuitry DGND GND CDCMA/HSOUT1 CDCMB/HSOUT2 Figure 2. 34921 Simplified Internal Block Diagram 34921 2 Analog Integrated Circuit Device Data Freescale Semiconductor TERMINAL CONNECTIONS TERMINAL CONNECTIONS GND CDCMA/HSOUT1 B+ CDCMB/HSOUT2 BPWM APWM CPWMB NC DGND CPWMA/CDCPWM CE SCLK MOSI MISO RST GND GND VCORE SELECT SA/CDCMA SA/CDCMB SB/LSOUT1 SB/LSOUT2 B+ NC NC 3.3V SWITCH 3.3 V VCORE SUPPLY VCORE ADCMA ADCMA GND 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 24 25 26 27 28 29 30 31 32 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 GND ENC_FILTA ENC_FILTB AN3/ANALOGIN_B AN2/ANALOGIN_A AN1/ANALOGOUT_B AN0/ANALOGOUT_A GND NC 5V 5 V SUPPLY 5 V SWITCH 5 V SELECT BDCMA BDCMA GND Figure 3. Terminal Function Description Table 1. Terminal Function Description A functional description of each terminal can be found in the Functional Terminal Description section beginning on page 18 Terminal 1, 16, 17, 24, 32, 33, 41, 48, 49, 64 2 3 4 5 6 7, 20, 21, 28, 29, 62 8, 9, 25, 40, 57 Terminal Name GND Formal Name Ground Ground. Definition VCORE SELECT SA/CDCMA SA /CDCMB SB/LSOUT1 SB /LSOUT2 B+ NC Core Voltage Output Select Unipolar Step A/ DC Motor C Output A Unipolar Step A / DC Motor C Output B Unipolar Step B/ Low-Side 1 Unipolar Step B/ Low-Side 2 Power Supply Input No Connect Core voltage regulator output voltage select. Step Motor Output A or DC Motor C Output A. Step Motor Output A or DC Motor C Output B. Step Motor Output B or Low-Side Output 1. Step Motor Output B or Low-Side Output 2. Motor and regulator input voltage. No internal connection to this terminal. CP2 GND NC CP1 GATEOUT B+ B+ BDCMB BDCMB GND GND ADCMB ADCMB B+ B+ VBOOST 17 18 19 20 21 22 23 34921 Analog Integrated Circuit Device Data Freescale Semiconductor 3 TERMINAL CONNECTIONS Table 1. Terminal Function Description (continued) A functional description of each terminal can be found in the Functional Terminal Description section beginning on page 18 Terminal 10 Terminal Name 3.3 V SWITCH Formal Name 3.3 V Switching Regulator Switch Output 3.3 V Regulator Feedback Core Voltage Regulator Input Core Voltage Regulator Output DC Motor A Output A DC Motor A Output B Boost Voltage Switching Capacitor 2 Switching Capacitor 1 High-Side MOSFET Gate Driver DC Motor B Output B DC Motor B Output A 5.0 V Regulator Mode Select 5.0 V Switching Regulator Switch Output 5.0 V Regulator Input Supply 5.0 V Regulator Feedback AN0/Analogout_A AN1/Analogout_B AN2/Analogin_A AN3/Analogin_B Analog Encoder Channel B Filter Analog Encoder Channel A Filter Reset Master In Slave Out Master Out Slave In Serial Clock 3.3 V regulator switching output. Definition 11 12 13 14, 15 18, 19 22 23 26 27 30, 31 34, 35 36 37 3.3 V Feedback terminal for 3.3 V switching regulator and internal logic supply. Core regulator input supply. Core regulator output voltage. DC motor driver A output A. DC motor driver A output B. Boost voltage storage node. Charge pump capacitor connection 2. Charge pump capacitor connection 1. Gate driver for external N-channel switch. DC motor driver B output B. DC motor driver B output A. 5.0 V regulator operating mode select. 5.0 V switching regulator switching output. VCORE SUPPLY VCORE ADCMA ADCMB VBOOST CP2 CP1 GATEOUT BDCMB BDCMA 5 V SELECT 5 V SWITCH 38 39 42 43 44 45 46 47 50 51 52 53 5 V SUPPLY 5V AN0/ANALOGOUT_A AN1/ANALOGOUT_B AN2/ANALOGIN_A AN3/ANALOGIN_B ENC_FILTB ENC_FILTA RST MISO MOSI SCLK 5.0 V regulator input voltage. 5.0 V regulator feedback. A/D input 0 or analog encoder output A. A/D input 1 or analog encoder output B. A/D input 2 or analog encoder input A. A/D input 3 or analog encoder input B. I/V amplifier channel B filter. I/V amplifier channel A filter. Reset input and output. Serial data out to MCU. Serial data in from MCU. Serial data clock. 34921 4 Analog Integrated Circuit Device Data Freescale Semiconductor TERMINAL CONNECTIONS Table 1. Terminal Function Description (continued) A functional description of each terminal can be found in the Functional Terminal Description section beginning on page 18 Terminal 54 55 56 58 59 60 61 Terminal Name CE CPWMA/CDCPWM DGND CPWMB APWM BPWM CDCMB/HSOUT2 Formal Name Chip Enable Motor Driver C PWM Input A Digital Ground Motor Driver C PWM Input B Motor Driver A PWM Input Motor Driver B PWM Input Motor Driver C DC Motor Output or HighSide Output 2 Motor Driver C DC Motor Output or HighSide Output 1 Serial data strobe. Step motor driver Phase A PWM or DC motor driver PWM. Digital ground. Step motor driver Phase B PWM. PWM input for DC motor driver A. PWM input for DC motor driver B. Step motor driver C output or high-side output 2. Definition 63 CDCMA/HSOUT1 Step motor driver C output or high-side output 1. 34921 Analog Integrated Circuit Device Data Freescale Semiconductor 5 MAXIMUM RATINGS MAXIMUM RATINGS Table 2. Maximum Ratings All voltages are with respect to ground unless otherwise noted. Exceeding these ratings may cause a malfunction or permanent damage to the device. Rating ELECTRICAL Ratings Input Power Supply Voltage IB+ = 0.0 A Logic Input Voltage Boost Supply Voltage Input Power Supply Ripple Voltage Ripple Voltage Measured at < 20 MHz Motor Drivers A & B Maximum Output Voltage 5.0 V Linear Regulator Maximum Output Voltage Startup 5.0 V Switching Regulator Maximum Output Voltage Startup 3.3 V Switching Regulator Maximum Output Voltage Startup VCORE Linear Regulator Maximum Output Voltage ICORE = 0.0 A Motor Drivers A, B, and C (Motor Driver C Configured as Step Motor Motor Driver A Sink or Source Current Motor Driver B Sink or Source Current Motor Driver C Sink or Source Current Motor Driver C in Step Mode Step Motor Output Current Output x or x On Motor Driver C in Step Mode Standoff Voltage Output Off, IDSS = 10 mA ESD Voltage (2) Symbol Max Unit B+ -0.3 to 38 VIN VBOOST VRIPPLEB 400 VOUTMAX V5.0 5.4 V5.0 5.4 V3.3 3.6 VCORE VCORE_NOM +10% Driver)(1) I PWM(A) I PWM(B) I PWM(C) I STEP 2.0 V BVDS 60 VESD ±2000 ±200 ±250 ±4.5 ±4.5 ±1.5 40 -0.3 to V5.0 +0.3 B+ +15 V V V mVPP V V V V V A A V V Non-Operating, Unbiased, Human Body Model Machine Model Charge Device Model Notes 1. B+ = 34 V, Motor Stalled and Saturated 2. ESD testing is performed in accordance with the Human Body Model (CZAP = 100 pF, RZAP = 1500 Ω), the Machine Model (CZAP = 200 pF, RZAP = 0 Ω), and the Charge Device Model. 34921 6 Analog Integrated Circuit Device Data Freescale Semiconductor MAXIMUM RATINGS Table 2. Maximum Ratings(continued) All voltages are with respect to ground unless otherwise noted. Exceeding these ratings may cause a malfunction or permanent damage to the device. Rating THERMAL RATINGS Operating Temperature Ambient Junction Storage Temperature Thermal Resistance Junction to Ambient(3) Junction to Board(4) Junction to Case Peak Package Reflow Temperature During Solder Mounting (5) THERMAL RESISTANCE AND PACKAGE DISSIPATION RATINGS Power Dissipation (TA = 25° C) (6) PD 2.0 W TA TJ TSTG 0.0 to 70 150 -55 to 150 °C °C Symbol Max Unit RθJA RθJB RθJC TSOLDER °C/W 40 14