MC34921AE

Freescale Semiconductor Technical Data MC34921 Rev 5.0, 07/2005 Configurable Motor Driver IC with Power Supplies 34921 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. H-BRIDGE MOTOR DRIVER AND POWER SUPPLY AE SUFFIX (Pb-Free) 98ARH98426A 64-LEAD LQFP-EP 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 ORDERING INFORMATION 34921 Serial MCU Ports A/D MISO MOSI SCLK CE Device Temperature Range (TA) Package MC34921AE/R2 0°C to 70°C 64 LQFP-EP B+ B+ GATEOUT 5.0 V 3.3 V VCORE High-Side MOSFET AN0 ADCMA Inputs A B+ B+ B Step Motor C AN3 SA/CDCMA SB/LSOUT1 ADCMB CPWMA BDCMA CPWMB B A APWM SB/LSOUT2 SA/CDCMB DGND BPWM BDCMB GND 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. DC Motor A DC Motor B INTERNAL BLOCK DIAGRAM INTERNAL BLOCK DIAGRAM CP1 B+ 5 V SUPPLY VBOOST Charge Pump Gate Voltage Generator 5 V SELECT 5 V SWITCH CP2 Thermal Shutdown 5.0 V Dual Mode Regulator 5V B+ B+ BPWM 3.3 V SWITCH BDCMA 3.3 V VCORE SUPPLY VCORE VCORE SELECT ENC_FILTB ENC_FILTA AN3/ANALOGIN_B AN2/ANALOGIN_A AN1/ANALOGOUT_B 3.3 V Switching Regulator Oscillator BDCMB Motor Driver B VCORE Linear Regulator B+ APWM I/V Converter ADCMA A/D Converter and Multiplexer ADCMB Motor Driver A AN0/ANALOGOUT_A SA/CDCMA SA /CDCMB MISO Active Clamp MOSI SCLK Serial I/O SB/LSOUT1 Step Motor Driver SB/LSOUT2 CPWMA/CDCPWM CPWMB CE SS DC Motor Driver GATEOUT Gate Driver RST Supervisor Circuitry DGND CDCMA/HSOUT1 CDCMB/HSOUT2 GND Figure 2. 34921 Simplified Internal Block Diagram 34921 2 Analog Integrated Circuit Device Data Freescale Semiconductor TERMINAL CONNECTIONS 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 GND CDCMA/HSOUT1 B+ CDCMB/HSOUT2 BPWM APWM CPWMB NC DGND CPWMA/CDCPWM CE SCLK MOSI MISO RST GND TERMINAL CONNECTIONS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 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 CP2 GND NC CP1 GATEOUT B+ B+ BDCMB BDCMB GND VBOOST GND ADCMB ADCMB B+ B+ 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 17 18 19 20 21 22 23 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 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 Terminal Name Formal Name 1, 16, 17, 24, 32, 33, 41, 48, 49, 64 GND Ground VCORE SELECT Core Voltage Output Select Core voltage regulator output voltage select. 2 Definition Ground. 3 SA/CDCMA Unipolar Step A/ DC Motor C Output A Step Motor Output A or DC Motor C Output A. 4 SA/CDCMB Unipolar Step A/ DC Motor C Output B Step Motor Output A or DC Motor C Output B. 5 SB/LSOUT1 Unipolar Step B/ Low-Side 1 Step Motor Output B or Low-Side Output 1. 6 SB/LSOUT2 Unipolar Step B/ Low-Side 2 Step Motor Output B or Low-Side Output 2. 7, 20, 21, 28, 29, 62 B+ Power Supply Input 8, 9, 25, 40, 57 NC No Connect Motor and regulator input voltage. No internal connection to this terminal. 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 Terminal Name Formal Name 10 3.3 V SWITCH 3.3 V Switching Regulator Switch Output 11 3.3 V 3.3 V Regulator Feedback Feedback terminal for 3.3 V switching regulator and internal logic supply. VCORE SUPPLY Core Voltage Regulator Input Core regulator input supply. 13 VCORE Core Voltage Regulator Output 14, 15 ADCMA DC Motor A Output A DC motor driver A output A. 18, 19 ADCMB DC Motor A Output B DC motor driver A output B. 22 VBOOST Boost Voltage Boost voltage storage node. 23 CP2 Switching Capacitor 2 Charge pump capacitor connection 2. 26 CP1 Switching Capacitor 1 Charge pump capacitor connection 1. 27 GATEOUT High-Side MOSFET Gate Driver 30, 31 BDCMB DC Motor B Output B DC motor driver B output B. 34, 35 BDCMA DC Motor B Output A DC motor driver B output A. 36 5 V SELECT 5.0 V Regulator Mode Select 5.0 V regulator operating mode select. 37 5 V SWITCH 5.0 V Switching Regulator Switch Output 38 5 V SUPPLY 5.0 V Regulator Input Supply 39 5V 5.0 V Regulator Feedback 42 AN0/ANALOGOUT_A AN0/Analogout_A A/D input 0 or analog encoder output A. 43 AN1/ANALOGOUT_B AN1/Analogout_B A/D input 1 or analog encoder output B. 44 AN2/ANALOGIN_A AN2/Analogin_A A/D input 2 or analog encoder input A. 45 AN3/ANALOGIN_B AN3/Analogin_B A/D input 3 or analog encoder input B. 46 ENC_FILTB Analog Encoder Channel B Filter I/V amplifier channel B filter. 47 ENC_FILTA Analog Encoder Channel A Filter I/V amplifier channel A filter. 50 RST Reset Reset input and output. 51 MISO Master In Slave Out Serial data out to MCU. 52 MOSI Master Out Slave In Serial data in from MCU. 53 SCLK Serial Clock 12 Definition 3.3 V regulator switching output. Core regulator output voltage. Gate driver for external N-channel switch. 5.0 V switching regulator switching output. 5.0 V regulator input voltage. 5.0 V regulator feedback. 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 Terminal Name Formal Name Definition 54 CE Chip Enable 55 CPWMA/CDCPWM Motor Driver C PWM Input A 56 DGND Digital Ground 58 CPWMB Motor Driver C PWM Input B Step motor driver Phase B PWM. 59 APWM Motor Driver A PWM Input PWM input for DC motor driver A. 60 BPWM Motor Driver B PWM Input PWM input for DC motor driver B. 61 CDCMB/HSOUT2 Motor Driver C DC Motor Output or HighSide Output 2 Step motor driver C output or high-side output 2. 63 CDCMA/HSOUT1 Motor Driver C DC Motor Output or HighSide Output 1 Step motor driver C output or high-side output 1. Serial data strobe. Step motor driver Phase A PWM or DC motor driver PWM. Digital ground. 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 Symbol Max Unit ELECTRICAL Ratings Input Power Supply Voltage B+ IB+ = 0.0 A V -0.3 to 38 Logic Input Voltage Boost Supply Voltage Input Power Supply Ripple Voltage VIN -0.3 to V5.0 +0.3 V VBOOST B+ +15 V mVPP VRIPPLEB Ripple Voltage Measured at < 20 MHz 400 Motor Drivers A & B Maximum Output Voltage VOUTMAX 5.0 V Linear Regulator Maximum Output Voltage 40 V V5.0 Startup 5.4 5.0 V Switching Regulator Maximum Output Voltage V5.0 Startup V 5.4 3.3 V Switching Regulator Maximum Output Voltage V3.3 Startup V 3.6 VCORE Linear Regulator Maximum Output Voltage Motor Drivers A, B, and C (Motor Driver C Configured as Step Motor V VCORE ICORE = 0.0 A VCORE_NOM +10% Driver)(1) A Motor Driver A Sink or Source Current I PWM(A) ±4.5 Motor Driver B Sink or Source Current I PWM(B) ±4.5 Motor Driver C Sink or Source Current I PWM(C) ±1.5 Motor Driver C in Step Mode Step Motor Output Current Motor Driver C in Step Mode Standoff Voltage 2.0 V BVDS Output Off, IDSS = 10 mA (2) A I STEP Output x or x On ESD Voltage V V 60 VESD V Non-Operating, Unbiased, Human Body Model ±2000 Machine Model ±200 Charge Device Model ±250 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 Symbol Max Unit Ambient TA 0.0 to 70 Junction TJ 150 TSTG -55 to 150 RθJA 40 RθJB RθJC