HVAC Architecture & Infineon Products April 2014 Table of content Application overview HVAC Loads - Flaps HVAC Loads – Blower Motor Other loads – Heater Elements Communication & Control Unit 2014-03-19 Copyright © Infineon Technologies AG 2014. All rights reserved. Page 2 HVAC System - Overview Heater & Cooler Unit Blower Unit Compressor Condenser Image Source: Calsonic-Kansei - www.calsonickansei.co.jp 5/13/2014 Copyright © Infineon Technologies 2009. All rights reserved. Page 3 HVAC Generic Module Sensors AC Unit Heating Unit Control Panel Flaps HVAC Module 5/13/2014 Copyright © Infineon Technologies 2009. All rights reserved. Blower Page 4 Basic HVAC System Actuators Heater On/Off Blower Speed Recirculation On/Off Air Distribution Temperature Mix 3+ Flaps 1 Blower Controller 5/13/2014 A/C On/Off Relays Page 5 Table of content Application overview HVAC Loads - Flaps HVAC Loads – Blower Motor Other loads – Heater Elements Communication & Control Unit Copyright © Infineon Technologies 2009. All rights reserved. Page 6 Example Block Diagram 5/13/2014 Page 7 HVAC Loads - Flaps HVAC Flaps Task: Open and close a flap Implementation DC w/ Potentiometer DC w/ Ripple Count Stepper Motor Decentralized Architecture with LIN slaves Source: Woory Industries, Woory.com 5/13/2014 APAC architecture Predominantly using DC motor with potentiometer feedback Page 8 Driving concepts – Stepper Motor Stepper Motors Flaps are driven by stepper motors Inputs Open loop control is possible, no feedback needed MCU M Bipolar stepper motors require three or four half-bridges to be driven Products TLE4726G TLE4728G TLE4729G TLE8444SL (new) Inputs MCU M 5/13/2014 Page 9 Driving concepts – Servo loop Servo Control Set M Feedback A servo driver (e.g. TLE4209G) can be used to drive flap motors Reference signal generated by set potentiometer on HVAC controller Advantages No MCU needed Low cost Disadvantages A lot of fine tuning needed to make it work reliably High efforts for redesigns if changing mechanical design Products TLE4206G TLE4209G 5/13/2014 Page 10 TLE4206G Description ¬ ¬ ¬ ¬ Servo Driver w/closed loop control Max output current: 1.5A Current Peak Blanking (CPB) feature Saturation voltage Vsat-total typ=1.2V @ IQ=0.4A ¬ Amplification and angle shift can be adjusted with external resistors ¬ Range Input to protect reference potentiometer against short circuit Protection: SC, OT, OV, UV Package : PG-DSO-14 Typical Application ¬ Vertical light leveling using a Servo Motor Benefits ¬ Electrolytic capacitor at VS is not necessary due to CPB feature 2014-03-19 Copyright © Infineon Technologies AG 2014. All rights reserved. Page 11 Driving concepts – Potentiometer Feedback Potentiometer Feedback Inputs M MCU Feedback Flaps are driven by DC Motors Current consumption <1A Motors can be cascaded N+1 half-bridges required for N Motor For position detection a feedback potentiometer is used Feedback requires 2 additional wires do each motor Architecture used worldwide Products TLE4207G TLE4208G TLE6208-3G TLE6208-6G TLE84106EL (new!) TLE84110EL (new!) 5/13/2014 Page 12 Driving concepts – Ripple detection Ripple Detection Inputs MCU Current Measurement M Flaps are driven by DC Motors For position detection the ripple on the motor supply is measured The ripple is due to commutation of the DC motor Advantages The feedback line for the motor position can be saved Disadvantages Noise on the line is critical No absolute position, needs detection of every pulse and homing at start-up No Infineon Products 5/13/2014 Page 13 Driving concepts – Decentralized Architecture Decentralized Architecture Vbat LIN Transceiver LIN Slave M LIN Slave M LIN Slave M LIN Slave M LIN Slave M LIN Slave M LIN Slave 5/13/2014 M There are 2 types of Motors Stepper Motors DC motor Benefits: Reduced wiring costs High volume non-programmed standard flaps (“Gleichteile”) usable LIN Auto-Addressing to detect flap position HVAC control module is not limited to x number of HVAC flaps – highly flexible HVAC flap system Disadvantages Higher cost for electronics Infineon Products Discrete: LIN transceivers, Vregs, 8-bit MCU (4k / 8k flash) Page 14 TLE 84106EL HEX-HALF-BRIDGE DRIVER FAMILY for DC MOTORs 6x Half Bridge Power Outputs Path RDSON@TJ=150C : 4Ω max 0.5A max DC continuous current 6x ideal for HVAC Flap DC motor application ES Available QS Q1 2011 Low total supply and logic current consumption in standby mode = 4µA max. 16-bit standard SPI with daisy chain capability PG-SSOP-24 in Exposed Pad package TLE 84106EL Availability Protective Functions Over load and short circuit protection Thermal shutdown Electrostatic discharge protection (ESD) Diagnosis Functions – error latched via SPI Short Circuit Detection Temperature pre-warning Open Load Detection Overvoltage Protection 5/13/2014 Page 15 Application Block Diagrams current vs NEW ASSP design for 3 motors CURRENT DESIGN NEW ASSP DESIGN VS VS Reverse polarity and pulse filter Vcc Vcc Vcc Reverse polarity and pulse filter Vcc Vcc TLE4208_1 INH1,2 TLE84106 INHIBIT 1,2 OUT 1 IN1 INH EF1,2 Control logic and fault detection 1,2 IN2 INHIBIT M Charge pump & bias OUT 2 OUT 1 INH3,4 INHIBIT 3,4 OUT 3 IN3 EF3,4 µC Control logic and fault detection 3,4 IN4 M µC OUT 2 M CSN OUT 4 DI DO TLE4208_2 INH5,6 OUT 5 IN5 EF5,6 CLK INHIBIT 5,6 Control logic and fault detection 5,6 IN6 M OUT 3 SPI 16-bit Control logic, Latch circuit, Error detection block M OUT 4 OUT 6 OUT 5 INHIBIT 7,8 OUT 7 Control logic and fault detection 7,8 13.05.2014 M OUT 6 OUT 8 Page 16 Table of content Application overview HVAC Loads - Flaps HVAC Loads – Blower Motor Other loads – Heater Elements Communication & Control Unit 2014-03-19 Page 17 Example Block Diagram 5/13/2014 Page 18 Possible DC blower motor drive topologies LINEAR Vbat Blower Motor Driver Vmotor M Vdrain IM Brushed DC motors can be driven with these main topologies D G Input VDS S Driver Rsh HVAC controller Linear Voltage is divided between Motor and transistor (operated in linear region) A lot of power dissipated (lost) in transistor Vbat Vbat PWM2 PWM1 Rev. Pol. EMC filter Rev. Pol. EMC filter M Driver M Driver Vbat Vbat PWM4 PWM3 Rev. Pol. EMC filter Rev. Pol. EMC filter HS HS M Driver Driver LS 5/13/2014 PWM Switch in high-or low-side Diode or transistor switch in recirculation path LS M Page 19 HVAC Loads – Blower Motor Blower Motor Driver Blower Motor Three main implementations Brushed DC, resistor load Brushed DC, linear Control Brushed DC, PWM Control (emerging) BLDC motor (high-end) Source: Calsonic-Kansei - www.calsonickansei.co.jp Blower Driver with cooling body Driver with cooling body Source: Woory Industries, Woory.com 5/13/2014 Copyright © Infineon Technologies 2009. All rights reserved. Source: BHTC, www.bhtc.de Page 20 Blower motor module Linear mode control Thermal fuse Trips at 132°C MOSFET, TO247, 60V, 9mohm, 70A Blower module Linear motor control 30A DC brush motor 5/13/2014 Page 21 Linear mode control LINEAR Vbat Linear Blower Vmotor M Vdrain IM Transistor in linear region can be used Often, some protection is needed against overtemperature Speed Tempfets can be used, e.g. BTS282Z D G Input VDS S Driver Rsh HVAC controller Vbat Vbat PWM2 PWM1 Rev. Pol. EMC filter Rev. Pol. EMC filter M Driver M Driver Vbat Vbat PWM4 PWM3 Rev. Pol. EMC filter Rev. Pol. EMC filter HS Driver Driver LS 5/13/2014 MOSFET, TO247, 60V, 9mohm, 70A HS M LS M Page 22 Possible PWM blower drive topologies VS LINEAR PWM Blower – Active Recirculation BTN89xx BTN79xB Vbat Vmotor M INH Vdrain ON/OFF IM D G IN Input S Driver Vbat Vbat PWM1 IS Rev. Pol. EMC filter OUT Rsh HVAC controller SR VDS PWM2 Diagnostic Current Sense M Rev. Pol. EMC filter Driver A transistor is used in the recirculation path Low Rds,on leads to small power losses during recirculation Switching speed of 35kHz needed (above audible spectrum) Lower power losses allow less cooling EMC filtering needed to reduce emissions NovalithIC can be used (e.g. BTN89xx) GND M Driver Vbat Vbat PWM4 PWM3 Rev. Pol. EMC filter Rev. Pol. EMC filter HS Driver Driver LS 5/13/2014 HS M LS M Page 23 NovalithIC H-Bridge Application Circuit Microcontroller Voltage Regulator I/O Reset Vdd µC Power Window WO TLE I RO 4278G Q D GND Vs I/O I/O I/O I/O I/O Vss BTN8982 INH BTN8982 VS IN IS OUT VS M INH IN OUT SR Reversible Seat Belt Pretensioner IS SR GND GND High Current H-Bridge 21.05.2010 Copyright © Infineon Technologies 2006. All rights reserved. Page 24 NovalithIC™ trends BTN7970 Rdson=16 mΩ (path) Id=70 A (current limitation) Optimized for higher current Faster applications, i.e. switching Lower Rdson (down to 600ns) Extended operation voltage range down to 4.5V BTN7960 Rdson=16 mΩ (path) Id=47 A (current limitation) BTN7930 Rdson=28 mΩ (path) Id=32 A (current limitation) 04/23/2010 Further optimized for half bridge applications Lower feature set, i.e. no current sense. Copyright © Infineon Technologies 2008. All rights reserved. Page 25 Product Overview NovalithIC™ 1 Product Type Packages Operating Range [V] R on path (typ) [mW] BTN 7930B PG-TO263-7 5.5 - 28.0 28.0 32 7.0 1 OV, OT, OC , CS OV, UV, OT, OC BTN 7930P PG-TO220-7 5.5 - 28.0 29.6 32 7.0 1 OV, OT, OC , CS OV, UV, OT, OC BTN 7930S PG-TO220-7 5.5 - 28.0 28.2 32 7.0 1 OV, OT, OC , CS OV, UV, OT, OC BTN 7960B PG-TO263-7 5.5 - 28.0 16.0 47 7.0 1 OV, OT, OC , CS OV, UV, OT, OC BTN 7960P PG-TO220-7 5.5 - 28.0 17.6 47 7.0 1 OV, OT, OC , CS OV, UV; OT, OC BTN 7960S PG-TO220-7 5.5 - 28.0 16.2 47 7.0 1 OV, OT, OC , CS OV, UV, OT, OC BTN 7970B PG-TO263-7 5.5 - 28.0 16.0 70 7.0 1 OV, OT, OC , CS OV, UV, OT, OC BTN 7970P PG-TO220-7 5.5 - 28.0 17.6 70 7.0 1 OV, OT, OC , CS OV, UV, OT, OC BTN 7970S PG-TO220-7 5.5 - 28.0 16.2 70 7.0 1 OV, OT, OC , CS OV, UV, OT, OC BTN 7971B PG-TO263-7 5.5 - 28.0 16.0 70 7.0 0.5 OV, OT, OC , CS OV, UV, OT, OC BTN 7933B PG-TO263-7 5.5 - 28.0 28.0 32 7.0 0.5 OV, OT, OC , CS OV(SCL), UV, OT, OC BTN 7963B PG-TO263-7 5.5 - 28.0 16.0 47 7.0 0.5 OV, OT, OC , CS OV(SCL), UV, OT, OC BTN 7973B PG-TO263-7 5.5 - 28.0 16.0 70 7.0 0.5 OV, OT, OC , CS OV(SCL), UV, OT, OC BTN8946TA PG-TO263-7 5.5 – 40.0 6.71 42 7.0 0.25 OT, OC, CS UV, OT, OC BTN8962TA PG-TO263-7 5.5 – 40.0 14.2 42 7.0 0.25 OT, OC, CS UV, OT, OC BTN8982TA PG-TO263-7 5.5 – 40.0 10.0 70 7.0 0.25 OT, OC, CS UV, OT, OC HS switch only 09.09.2013 ID (lim) [A] Iq (typ) [µA] Switch time (typ) [µs] Diagnosis Protect OV Over Voltage OC Over current UV Under Voltage SCL Smart Clamping OT Over temperature CS Current Sense Copyright © Infineon Technologies 2008. All rights reserved. Page 26 Possible PWM blower drive topologies LINEAR PWM Blower – Diode Recirculation Vbat Vmotor M Vdrain IM A diode is used in the recirculation path 0.7V drop leads to medium power losses during recirculation Switching speed of 25kHz needed (above audible spectrum) Lower power losses allow less cooling EMC filtering needed to reduce emissions New Speed Profet can be used (BTF50060-1TEA) D G Input VDS S Driver Rsh HVAC controller Vbat Vbat PWM2 PWM1 Rev. Pol. EMC filter Rev. Pol. EMC filter M Driver Vbat M Driver PWM4 Rev. Pol. EMC filter Rev. Pol. EMC filter HS µC SENSE HS M BTF50060 -1TEA Load Driver Driver LS 5/13/2014 INPUT Vbat Vbat PWM3 LS M M application_simple.emf Page 27 New family: Speed PROFETTM Lead type: Single channel 6mW High Side Driver BTF: Born To be Fast! BTF 50060-1TEA High speed: optimized for 25kHz PWM No external bootstrap capacitor required 6mW 12mW max @150°C Voltage controlled: direct input from the microcontroller 3.3V and 5V CMOS compatible inputs Infineon® INTELLIGENT LATCH PG-TO252-5 package In development Fuel pump Wiper HVAC Vbat Controlling Pumps, Valves, Motors and much more… Availability: INPUT µC SENSE In production Simple application schematic Q4 2009 BTF50060 -1TEA Load M application_simple.emf Page 28 Table of content Application overview HVAC Loads - Flaps HVAC Loads – Blower Motor Other loads – Heater Elements Communication & Control Unit Copyright © Infineon Technologies 2009. All rights reserved. Page 29 Example Block Diagram 5/13/2014 Page 30 Other loads – Heater Elements Heater Elements Heater Relay Source: Beru, www.beru.com Rear defogger Up to 20A Used to defrost rear window PTC auxiliary heater Provides heating before the engine reaches necessary temperature can require more than 100A This kind of high current is usually driven through a relay High-end (Europe) sometimes uses solidstate switches (no switching noise, longer service-life), can be integrated in the heater itself Source: Woory – www.woory.com 5/13/2014 Products BTS32xxG (relay drive) BTS34xxG (relay drive) High Current Profets (solid state), e.g. BTS6143D, BTS50060-1 Page 31 HITFETTM Family Chart 12V applications (40V) Id-nom range 7A 1-Ch Restart 1-Ch Latch BTS3256D BTS3160D 7A, 10mΩ, DPAK 5pin 24V - 42V applications (60V) 2-Ch Restart 1-Ch Restart 1-Ch Latch 7.8A, 10mΩ, DPAK 5pin BTS949 6A 6.4A, 18mΩ, TO220 BTS149 6.4A, 18mΩ, TO220 5A 3A- 4A BTS142D BTS3142D 4.6A, 30mΩ, DPAK 4.6A, 30mΩ, DPAK BTS134D BTS3134D 3.5A, 50mΩ, DPAK 3.5A, 50mΩ, DPAK BSP78 3A- 4A 2A 3A, 50mΩ, SOT223 BTS118 2.4A, 100mΩ, DPAK BSP77 2.17A, 100mΩ, SOT223 1A BSP76 1.4A, 200mΩ, SOT223 BTS141TC 5.1A, 28mΩ, TO263 BTS3028SDL 4.0A, 28mΩ, DPAK 4.0A, 28mΩ, DPAK BTS3134N BTS3046SDR 3A, 50mΩ, SOT223 2.8A, 46mΩ, DPAK BTS133TC 3.8A, 50mΩ, TO263 BTS3046SDL BTS3118D BTS3104SDR 2.4A, 100mΩ, DPAK 2.0A, 104mΩ, DPAK 1.4A, 200mΩ, SOT223 BTS117TC BTS3104SDL 2.17A, 100mΩ, SOT223 BTS3110N 2.8A, 46mΩ, DPAK 2.6A, 100mΩ, TO263 BTS3118N 2.0A, 104mΩ, DPAK BTS3410G 1.3A, 200mΩ, DSO8 BTS3408G < 1A BTS3028SDR BSP75N 0.55A, 550mΩ, DSO8 BSP75N 0.7A, 550mΩ, SOT223 0.7A, 550mΩ, SOT223 BTS3405G BTS3207N 0.35A, 700mΩ, DSO8 0.64A, 500mΩ, SOT223 BTS3205G/N 5/13/2014 0.35A, 700mΩ, DSO8 &SOT223 BTS3800SL 0.4A, 800mΩ, SCT595 Page 32 Table of content Application overview HVAC Loads - Flaps HVAC Loads – Blower Motor Other loads – Heater Elements Communication & Control Unit Copyright © Infineon Technologies 2009. All rights reserved. Page 33 Example Block Diagram 5/13/2014 Page 34 System aspects: Conventional LIN system solution 12V Voltage Regulator Standard LIN Transceiver TLE7259-2GE/GU OUT1 INH RxD 1 8 EN 2 7 VS WK 3 6 BUS TxD 4 5 GND 5V OUT2 Reset 8BIT µC IN1 Typical Application: Small LIN Slaves with 8BIT µC Control Panel Mirror Electronic Sensor interface Infineon transceivers: We talk robust! Page 35 System basic chips • Sleep Mode, Stop Mode for low current consumption. • Special modes for Flash, Fail Safe. • Configuration of CAN, LIN, Vreg., Reset level, Wake 5V Vreg.3 SPI State Machine Wake SPI INT Limp Home LH WD RO Wake Input Vreg.1 200mA supply for µC Vreg.2 200mA supply for CAN and other Loads CAN HS CAN 5V 5V Infineon LIN cell, released at OEMs 5/13/2014 3 Limp Home Output for switching on Loads in case for failure. TxD LIN3 HS CAN RxD LIN3 HS CAN TxD RxD HS CAN RxD LIN3 Serial interface for Setup, Mode Change, interrupt handling, watchdog Trigger RxD TxD Infineon HS-CAN cell, released at OEMs Vcc3 voltage regulator for up to 400mA. Overcurrent limitation Configurable Watchdog, window or timeout TxD Page 36 Infineon provides complete solutions for HVAC Control Module Control Panel 22 1) SPI / Mirror Control 26 ° Hall C Switch 18 3 4 +12V from Battery CAN Bus Flap #3 System Basis Chip TLE 7263E LIN LDO TLE 8458 Multi Half Bridges TLE 84106 EL (3 Flaps) 1) М SPI 16/32-bit Microcontroller XC2200 Family Flap #1 Hall Switch TLE4946 Flap #5 Multi Half Bridges TLE 84110 EL (5 Flaps)1) М 6x OptiMOS™ IPBxxN04S3-xx IPDxxN04S4-xx HS Driver Alternatively: LIN Bus 5V Supply Hall Switch TLE4966 Communication 0 2 I/O TLE4966 1 In development Flap #2 24 Sensorless 3ph Motor Driver 20 HVAC Control Module Flap #4 Hall Switch TLE4946 VBAT М 3 Phase Driver IC TLE 7185E Brushless DC Blower Motor Option: Remote Blower Motor Module VBAT Shunt Resistor PWM Interface HiC PROFET ™ BTS500x0-1EGA BTS 6143 VBAT 3 Phase Driver IC TLE 7184 М XC800 Heating Element Shunt Resistor 5/13/2014 Page 37 Question? Thanks!!! 5/13/2014 Page 38