APPLICATION NOTE Proposal for Window Lifter - Short Description ATA6823 Description In order to facilitate the use of Atmel®’s versatile H-bridge motor driver ATA6823, a schematic for a typical application has been developed. Using the Atmel ATA6823 allows the usage of a low-drop reverse-voltage protection module because of Atmel ATA6823’s internal charge pump. If sufficient, using only a reverse protection diode is also possible. For EMC optimization, the motor bridge proposal includes the simple snubber-network R8/C19 and slew-rate-reducing R10/C18. The values provided are standard values, and have to be adapted to the designated application according to the EMC requirements. Optional resistor R11 is an additional gate line break guarantee, Atmel ATA6823 has an integrated 100-k pull-down resistor. Pinch protection is realized by using a 10-m resistor (R22) for current sensing, depending on the maximum current of the DC motor. The control and shutdown has to be done by the microcontroller. To monitor the window movement and stop position, an optional Hall sensor can be integrated. The VCC supply voltage output of the Atmel ATA6823 is adjusted to 5V by connecting VMODE and VINT to power the optional Hall sensor. The watchdog is adjusted to 70Hz by R6 (33k). Depending on the car’s LIN bus, an optional bus filter may be necessary. The LIN transceiver is configured as a slave. The clamp KL15 can wake up the window lifter system for initialization. Common wake up is done by the LIN line. All diagnosis and LIN transceiver pins are accessible via the microcontroller. The motor bridge control, diagnosis and LIN transceiver lines can be addressed by the application program. An ISP interface is available for programming the AVR® microcontroller. 4924C-AUTO-06/15 6 GND /RESET 5 L2 2 VCC 4 MOSI ISP 1 LIN 2 KL15 MISO 1 SCK 3 X1 1 GND Ferrit 100nF 100nF 100nF C28 C26 C27 220pF C29 Optional busfilter C2 2.2μF C1 10nF V+ L3 10μH 6 4 5 3 8 7 18 20 21 29 33kΩ R6 10kΩ R3 D1 BAS16 10kΩ R7 Q2 BC817-40 VCC IC2 PD5(T1/OC0B) PD6(AIN0/OC0A) VCC PB5(SCK) PB4(MISO) PB3(MOSI/OC2A) PB2(SS/OC1B) PB1(OC1A) PB0(ICP1/CLKO) PD7(AIN1) PD4(XCK/T0) PD3(INT1/OC2B) PD2(INT0) PD1(TXD) PD0(RXD) ADC7 ADC6 GND GND PB7(XTAL2/TOSC2) PB6(XTAL1/TOSC1) PC5(ADC5/SCL) PC4(ADC4/SDA) PC3(ADC3) AREF AVCC PC2(ADC2) PC1(ADC1) PC0(ADC0) 330pF C14 R1 470Ω 17 16 15 14 13 12 11 10 9 2 1 32 31 30 22 19 28 27 26 25 24 LIN GND WD RESET CC RWD VINT VMODE 23 C4 R2 10kΩ C7 + 8 7 6 5 4 3 2 1 100nF C9 1 ATA6823 BROOKLIN IC1 C8 S2 Down 2 1 S1 Up 2 17 18 19 20 21 22 23 24 S1 H1 S2 H2 3 GND IN 1 VCC Optional hall sensor C13 220nF OUT IC4 2 VRES CPHI CPLO C12 470nF 470nF 100nF C6 + C5B 220μF/ 35V VG Low drop reverse voltage protection C5A + 220μF/ 35V C10 D2 GF1G 2.2μF 2.2μF 10 μF/35V Q1 SUM110N06-05L AGND PC6(RESET) ATMEGA88QFN 220nF C11 2.2μF C3 L1 7μH VBATSW 2 KL30 EN2 32 9 TX 31 VBAT 11 PWM X2 RX 12 EN1 10 DIR 30 VCO 29 PGND 28 13 DG3 PBAT 25 L1 27 14 L2 26 15 4924C–AUTO–06/15 16 ATA6823 [APPLICATION NOTE] DG2 2 DG1 C18 10nF 1 1MΩ R5 LM321 5 2 3 4 R4 10kΩ VCC 10nF C24 Q3 SUM110N06-05L R17 470kΩ R16 10Ω R14 10Ω R11 470kΩ R10 10Ω Q3 SUM110N06-05L R22 0R01 R18 4.7Ω 4.7nF C22 M+ 4.7nF C19 R8 4.7Ω C15 10nF C21 10nF C25 10nF R13 10Ω Motor bridge R20 470kΩ R21 10Ω R15 10Ω R12 470kΩ Q6 SUM110N06-05L Current sensing R19 4.7Ω 4.7nF C23 M- 4.7nF C20 R9 4.7Ω Q4 SUM110N06-05L Figure 1. Application Circuit 1. Revision History Please note that the following page numbers referred to in this section refer to the specific revision mentioned, not to this document. Revision No. History 4924C-AUTO-06/15 Put document in the latest template ATA6823 [APPLICATION NOTE] 4924C–AUTO–06/15 3 XXXXXX Atmel Corporation 1600 Technology Drive, San Jose, CA 95110 USA T: (+1)(408) 441.0311 F: (+1)(408) 436.4200 | www.atmel.com © 2015 Atmel Corporation. / Rev.: 4924C–AUTO–06/15 Atmel®, Atmel logo and combinations thereof, Enabling Unlimited Possibilities®, AVR®, and others are registered trademarks or trademarks of Atmel Corporation in U.S. and other countries. Other terms and product names may be trademarks of others. DISCLAIMER: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Atmel products. 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