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ATA6830 데이터시트 PDF




ATMEL Corporation에서 제조한 전자 부품 ATA6830은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


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부품번호 ATA6830 기능
기능 INTELLIGENT STEPPER MOTOR DRIVER
제조업체 ATMEL Corporation
로고 ATMEL Corporation 로고


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ATA6830 데이터시트, 핀배열, 회로
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Features
2-Phase 1 A Stepping Motor Driver
Compensated Half Step Operation
Chopper Current Control
Unidirectional Single Wire Bus Interface with Error Feedback
Intelligent Travel Operation Control
Referencing by Extending or Retracting
Application
Dynamic Headlamp Adjustment
Benefits
Error Recognition with Feedback
Short Circuit Protected Outputs
Overtemperature Warning and Shut Off
Supply Voltage Supervision
Electrostatic sensitive device.
Observe precautions for handling.
Intelligent
Stepper Motor
Driver
ATA6830
Description
The circuit serves to control a stepping motor for dynamic headlamp beam adjustment
in automobiles. Two chopper-controlled H-bridges serve as the stepping motor driver.
The circuit receives the commands to control the stepping motor by means of a unidi-
rectional serial single-wire bus.
An integrated process control independently moves the stepping motor into the new
desired position. This allows it to be automatically accelerated and slowed down. The
stepping motor is operated in compensated half-step operation. The maximum clock
frequency at which the stepping motor is operated depends on the supply voltage, the
chip temperature, the operating mode, and position difference.
Rev. 4575C–BCD–05/03
1




ATA6830 pdf, 반도체, 판매, 대치품
Functional Description
Analog Part
Figure 3. Analog Blocks
VBAT
VDD
Supply
Oscillator
Bias
Generator
Bandgap
Voltage
Voltage Temperature
Regulator Supervisor Supervisor
Bias
Voltage Levels
Temperature Levels
Clock
Reset
COS
RSET
AGND
VSS
The circuit contains an integrated 5 V regulator to supply the internal logic and analog
circuit blocks. The regulator uses an adjusted bandgap as voltage reference. Also all
other parts that require an excellent voltage reference, such as the voltage monitoring
block refer to the bandgap.
The bias generator derives its accurate currents from an external reference resistor. The
oscillator is used for clocking the digital system. All timings like the baud rate, the step
duration and the chopper frequency are determined from it. An external capacitor is
used for generating the frequency.
The voltage monitoring enables the circuit to drive the stepping motor at different battery
voltage levels. According to the battery voltage the stepping motor will be accelerated to
a maximum step velocity. In case of under or over voltage the motor will shut off. A tem-
perature monitoring is used for shut off at overtemperature conditions and current boost
in case of low temperature.
4 ATA6830
4575C–BCD–05/03

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ATA6830 전자부품, 판매, 대치품
Figure 6. Synchronization Sequence
SYNCHRONIZATION PATTERN
ATA6830
PARITY
BIT
START
BIT
PARITY
BIT
START
BIT
STOP
BIT
STOP
BIT
Between two commands a pause has to be included. This is necessary for a clear rec-
ogition of a new message frame (command). Figure 7 shows the timing diagram of two
commands.
Figure 7. Message Frame and Space
MESSAGE FRAME
SPACE
HIGH BYTE LOW BYTE
Every command consists of 16 bits. They will be sent with two bytes. Figure 8 shows the
message frame. The high byte is sent first, immediately followed by the low byte. Every
byte starts with a start bit and ends with a parity bit and a stop bit. The first start bit (level
0) after a pause (level 1) indicates the beginning of a new message frame. The value of
the parity bit has to be odd, i.e., the crossfooting of the byte including the parity bit is
odd. If a data packet is not recognized due to a transmission error (parity error), the
entire command is rejected.
Figure 8. Command Bits
HIGH BYTE
MESSAGE FRAME
LOW BYTE
PARITY
BIT
START
BIT
PARITY
BIT
76543210
76543210
START
BIT
8 DATA
BITS
STOP
BIT
8 DATA
BITS
STOP
BIT
4575C–BCD–05/03
7

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