ATMEL ATA6830

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
Intelligent
Stepper Motor
Driver
ATA6830
Electrostatic sensitive device.
Observe precautions for handling.
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 unidirectional 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
Voltage
Regulator
VSS
Supply Monitor
COS
Oscillator
VDD
Temperature Monitor
RSET
Biasing
AGND
Figure 1. Block Diagram
BUS
UART
VBAT1A
VBAT1B
Command Interpreter
SM1B
SRA
Driver Logic
Driver Logic
Cruising Service Control
SM1A
SRB
SM2A
SM2B
VBAT2A
VBAT2B
Test Logic
ATA6830
Pin Configuration
n.c.
COS
RSET
AGND
VSS
VDD
BUS
Figure 2. Pinning QFN 28
28
27
26
25
24
23
22
VBAT1A
1
21
VBAT1B
n.c.
2
20
n.c.
SM1A
3
19
SM1B
SRA
4
18
SRB
SM2A
5
17
SM2B
n.c.
6
16
n.c.
VBAT2A
7
15
VBAT2B
MLP 7x7mm
2
9
10
11
12
13
14
SCI1
SCI2
SCO2
TA
TTEMP
n.c.
8
SCO1
0.8mm pitch
ATA6830
28 lead
ATA6830
4575C–BCD–05/03
ATA6830
Pin Description
Pin
Symbol
Function
1
VBAT1A
Battery voltage
2
n.c.
Not connected
3
SM1A
4
SRA
5
SM2A
6
n.c.
7
VBAT2A
Battery voltage
8
n.c.
Not connected
9
SCI1
Test pin, please connect to ground for EMC reasons
10
SCO1
Test pin, please connect to ground for EMC reasons
Connection for stepping motor winding A
Sense resistor A connection
Connection for stepping motor winding A
Not connected
11
SCI2
Test pin, please connect to ground for EMC reasons
12
SCO2
Test pin, please connect to ground for EMC reasons
13
TA
Test pin, please connect to ground for EMC reasons
14
TTEMP
Test pin, please connect to ground for EMC reasons
15
VBAT2B
Battery voltage
16
n.c.
Not connected
17
SM2B
18
SRB
19
SM1B
20
n.c.
Not connected
21
VBAT1B
Battery voltage
22
BUS
Receives the control instructions via the single wire bus from the controller
23
VDD
5 V supply voltage output
24
VSS
Digital signal ground
25
AGND
Analog signal ground
26
RSET
Reference current setting. Connected externally with a resistor to AGND. The value of the resistor
determines all internal current sources and sinks.
27
COS
Oscillator pin, connected externally with a capacitor to AGND. The value of the capacitance determines
the chopper frequency and the baud rate for data reception.
28
n.c.
Not connected
Connection for stepping motor winding B
Sense resistor B connection
Connection for stepping motor winding B
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4575C–BCD–05/03
Functional Description
Analog Part
Figure 3. Analog Blocks
VBAT
VDD
Supply
Bias
Oscillator
Bias
Generator
Bandgap
Voltage
Regulator
Voltage
Supervisor
Temperature
Supervisor
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 temperature monitoring is used for shut off at overtemperature conditions and current boost
in case of low temperature.
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ATA6830
4575C–BCD–05/03
ATA6830
Digital Part
Figure 4. Digital Blocks
Clk
Step Time Memory
Reset
Voltage Levels
Maximum Step Time
Temperature Signals
New Step Time
Actual Step Time
Error Signals
UART
BUS
VREF
shiftclk
Clock
Recovery
bitstream
Bitstream
Recovery
rxd
reference run
Data
Recognition
&
Parity-Check
new position
Cruise Control
Stepper Motor Control
Desired Position
Instantaneous Position
Error Timer
Error Signals
Figure 4 shows all digital blocks of the circuit. The stepping motor will be controlled by
commands via the bus input pin. An analog comparator is used as a level shifter at the
input. There is also a possibility of clamping the bus pin to ground. This will be used after
detecting an error to feedback this to the microcontroller.
The next block is a UART. Its task is clock recovery and data recognition of the incoming
bit stream. For clock recovery a special bitstream is used after each power on. The generated bitstream will be analyzed and after a correct parity check interpreted for
execution.
A sophisticated cruise control generates all control signals for the two H-bridge drivers.
It uses an internal step-time table for accelerating and decelerating the stepping motor
depending on the actual and desired position and the temperature and voltage levels.
Exception handling is integrated to interpret and react on the temperature, supply voltage, and coil-current signals from the analog part.
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4575C–BCD–05/03
Stepping Motor Driver
Figure 5. H-bridge Driver Stage
Stepper Motor Control
Driver Logic
Error Signals
VBAT
SM1x
SM2x
Temperature
Shutdown
Temp. Shutdown
Temperature
Warning
Temp. Warning
Clk
SRx
Vref
Reset
Shunt
Figure 5 shows the diagram of one H-bridge driver stage. It consists of two NMOS and
two PMOS power transistors. An external shunt is used for measuring the current flowing through the motor coil. Additional comparators and current sensing circuitry is
integrated for error detection.
Data Communication
The circuit receives all commands for the stepping motor via a single wire bus. In idle
mode the bus pin is pulled up by an internal current source near to VBAT voltage. During the transmission the external transmitter has to pull down the bus level to send
information about data and clock timing. The used baud rate has to be about 2400 baud.
Because of oscillator tolerances a synchronization sequence has to be sent at the
beginning of data transfer.
Figure 6 shows the pattern used for this sequence. The circuit uses the 1-0-1-0
sequences for adjusting the internal bit time. Later on during data transfer every 1-0-1-0
sequence coming up randomly is used for resynchronization. Thus all tolerances that
occur during operation will be eliminated.
To obtain a synchronization of up to 15% oscillator tolerance the pattern has to be sent
at least 4 times.
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4575C–BCD–05/03
ATA6830
Figure 6. Synchronization Sequence
SYNCHRONIZATION PATTERN
PARITY
BIT
START
BIT
START
BIT
PARITY
BIT
STOP
BIT
STOP
BIT
Between two commands a pause has to be included. This is necessary for a clear recogition of a new message frame (command). Figure 7 shows the timing diagram of two
commands.
Figure 7. Message Frame and Space
MESSAGE FRAME
HIGH BYTE
SPACE
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
MESSAGE FRAME
HIGH BYTE
LOW BYTE
PARITY
BIT
7
START
BIT
6
5
4
3
8 DATA
BITS
2
1
0
7
STOP
BIT
PARITY
BIT
START
BIT
6
5
4
3
8 DATA
BITS
2
1
0
STOP
BIT
7
4575C–BCD–05/03
Bus Commands
There are different commands for controlling the stepping motor. Table 1 shows a list of
all implemented commands and their meanings. The first command, the synchronization
sequence, is described above. The second group of commands are the reference commands. A reference run command causes the stepping motor to make an initial run. It is
used to establish a defined start position for the following position commands. The way
the reference run is executed will be described later. There are two reference run commands. The difference is the turn direction of the stepping motor. This makes the circuit
more flexible for different applications. The turn direction is coded in the 4 identifier bits.
Table 1. Bus Commands
High Byte
Data
Mode
Low Byte
Identifier
Data
Bus Command
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Synchronization
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
Reference run (extend)
0
0
0
0
1
0
0
1
0
0
0
0
0
0
0
0
Reference run (retract)
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
0
New position (0 = full extension)
D8
D9
0
0
1
0
0
1
D0
D1
D2
D3
D4
D5
D6
D7
New position (0 = full retraction)
D8
D9
0
0
0
1
1
0
D0
D1
D2
D3
D4
D5
D6
D7
New position
(testmode, 0 = full extension)
D8
D9
1
1
1
0
0
1
D0
D1
D2
D3
D4
D5
D6
D7
New position
(testmode, 0 = full retraction)
D8
D9
1
1
0
1
1
0
D0
D1
D2
D3
D4
D5
D6
D7
The last class of commands are the position commands. Every new position will be sent
as an absolute value. This makes the transmission more safe in terms of losing a position command. The next received command tells the stepping motor the right position
again. For the position data there are 10 bits available (D0 to D9).
The maximum possible step count to be coded with 10 bit is 1024. Though position commands up to 1024 will be executed, it´s prohibited to use values higher than 698, as this
is the step count of the reference run. For details see chapter “Reference Run”.
There are 4 new position commands. They differ in the identifier and in the modus bits.
The identifier fixes the turn direction. For test purposes there are new position commands with a different mode. In this mode the stepping motor works with a reduced coil
current. This may be used for end tests in the production of the application.
Any command with modus or identifier different to the first reference run will be ignored.
Thus it is also not possible to change modus or identifier by performing a second reference run.
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4575C–BCD–05/03
ATA6830
Power-up Sequence
After power-up the circuit has to be synchronized and a reference run has to be executed before a position command can be carried out. Figure 9 shows a timing diagram
on how the necessary sequences follow each other.
Figure 9. Necessary Commands after Power-up
POWER
UP
SYNCHRONIZATION
SEQUENCE
REFERENCE RUN
SEQUENCE
POSITION 1
POSITION 2
1
2
4
1
2
10
MESSAGE
FRAME
The first sequence is the synchronization sequence. Its pattern (Figure 6) should be
sent at least 4 times to be sure that the following commands will be recognized. If there
are distortions on the bus it is helpful to send this sequence more than 4 times. A RC
lowpass filter at the bus pin (Figure 16) helps to reduce distortsions.
After synchronization the stepping motor has to make the reference run to initialize its
zero position. The first reference run will only be executed if the circuit recognizes this
command three times in series. This function is implemented contributing to the importance of the reference run. After the reference run the circuit will switch to normal
operation. To perform a reference run during normal operation, the command has to be
sent only once. Figure 10 shows the state diagram for the implemented sequence
processor.
9
4575C–BCD–05/03
Figure 10. Flow Diagram for the Power-up Sequence
reset state
N
synchronization
Y
idle state
N
3 successive
reference run
commands
Y
reference run
Y
cruise control
10
new position?
N
idle state
ATA6830
4575C–BCD–05/03
ATA6830
Reference Run
In normal operation, new position commands are transmitted as absolute values. To
drive the stepping motor to these absolute positions, the circuit has to know the motor’s
zero position. Therefore, the stepping motor has to perform a reference run after each
power-up in which it is extended or retracted to its limit stop. Before the execution of the
reference run, the motor is supplied with hold current.
As the actual position is not known at the beginning of the reference run the whole position range has to be passed. To optimize performance for smaller actuators, the
reference run has been reduced to 698 steps. Therefore, it is prohibited to access positions higher than 698, because in a following reference run the stepping motor would not
reach its zero position.
If it is necessary that the entire range up to position 1024 can be used, the reference run
has to be executed twice. Since any command during reference run is ignored, the second reference command has to be sent about 2.4 s after the first command.
To avoid any possible mistake, e.g., the loss of a step during the reference run or the
bouncing at the limit stop, there is a special run to be executed.
This is shown in Table 2.
Table 2. Reference Run Course
Phase
Action
Ramp up to 446 Hz step frequency
Drive
through
I
Drive at constant speed
Ramp down to minimum step
frequency (303 Hz)
the
whole
range
(698
steps)
II
III
Cruise Control
Int. Counter
Steptime
704
3300 µs
703
2895 µs
702
2540 µs
701
2240 µs
700 to 11
2240 µs
10
2240 µs
9
2549 µs
8
2895 µs
7 to 6
3300 µs
6
3300 µs
5 to 0
3300 µs
IV
Wait for 6 ´ 3300 µs with the last coil current
V
Perform another 6 steps with 3300 µs
VI
Wait for 5 ´ 3300 µs with the last coil current
0
3300 µs
VII
Set current to hold current; normal operation
varied
varied
The travel operation control independently moves the stepping motor into its new position. To reach the new position as fast as possible but without abrupt velocity changes,
the stepping motor is accelerated or slowed down depending on the difference between
actual and nominal position. If this difference is huge the stepping frequency will
increase (acceleration). When the new position is nearly reached, the frequency will
decrease again (deceleration). In the case of a new nominal position opposite to the
direction of the motion being from the microcontroller, the stepping frequency will
decrease to its starting value (300 Hz) before the direction can turn. The cruise control is
shown in Figure 11.
The possible stepping frequencies for velocity control are shown in Table 3.
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4575C–BCD–05/03
Figure 11. Dynamic Frequency Adaption
frequency
present
frequency
minimum
frequency
(300 Hz)
present position
nominal
position
time t+1
nominal
positon
time t
position
Table 3. Frequency Ramp
Number
Step Frequency (Hz)
Step Time (µs)
1
303
3300
2
345
2895
3
394
2540
4
446
2240
5
493
2030
6
538
1860
7
575
1740
8
613
1630
9
649
1540
10
680
1470
11
714
1400
12
741
1350
13
769
1300
14
800
1250
15
826
1210
16
855
1170
17
877
1140
18
901
1110
19
926
1080
20
952
1050
21
980
1020
22
1000
1000
In addition to the actual step frequency there is a maximum step frequency up to which
the actual step frequency can rise. To secure a correct operation at low supply voltages
the maximum value for the stepping frequency is smaller at low voltages. If the supply
voltage falls below the 9 V threshold, travel operation will suspend. To restart operation,
the supply voltage has to rise above 10.5 V. The relation of the maximum step frequency and the supply voltage during operation is shown in Table 4.
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ATA6830
4575C–BCD–05/03
ATA6830
If the chip temperature exceeds the overtemperature warning threshold, the step speed
is reduced to 300 Hz. If the chip temperature rises further the output driver is shut off.
Table 4. Maximum Step Frequency
Step Operation
VBAT
Maximum Step Frequency
at Rising Voltage
Maximum Step Frequency
(VBAT once > 10.5 V)
<9V
No operation
No operation
9 V to 9.5 V
No operation
300 Hz (3.33 ms)
9.5 V to 10 V
No operation
500 Hz (2.03 ms)
10 V to 10.5 V
No operation
680 Hz (1,47 ms)
10.5 V to 11 V
850 Hz (1.17 ms)
850 Hz (1.17 ms)
> 11 V
1000 Hz (1 ms)
1000 Hz (1 ms)
> 20 V
No operation
No operation
The stepping motor is operated in halfstep-compensation mode. The current for both
coils is shown in Figure 12. The current levels are increased when the temperature is
below 0°C to secure operation. For final tests at the end of the application production
line the currents are reduced.
Figure 12. Compensated Halfstep Operation
coil A
700mA
500mA
half steps
-500mA
-700mA
coil B
1
2
3
4
5
6
7
8
700mA
500mA
half steps
-500mA
-700mA
Bridge Current Control
The bridge current is controlled by a chopper current control, shown in Figure 13. The
current is turned on every 40 µs (25 kHz chopper frequency). The current flow in the Hbridge is shown in Figure 14a. After a blanking time of 2.5 µs to suppress turn-on peaks
the current is measured via the shunt voltage. As soon as the current has reached its
nominal value it is turned off again. The current flow in this state is shown in Figure 14b.
13
4575C–BCD–05/03
Figure 13. Chopper Current Control
turn on signal
Imax
coil current
flyback
comparator
shunt resistor
voltage
blanking time
Figure 14. Current Flow in Halfbridge
ON
OFF
ON
ON
OFF
ON
OFF
OFF
a)
Exception Handling
b)
During operation, different exceptional states or errors can arise to which the circuit
must correspondingly react. These are described below:
•
Supply voltage below 9 V
Travel operation is suspended for the duration of the undervoltage. The output current
will be set to zero. When the supply voltage rises above 10.5 V, travel operation
restarts.
•
Supply voltage above 20 V
Travel operation is suspended for the duration of the undervoltage. The output current
will be set to zero. When the supply voltage falls below 20 V, travel operation restarts.
•
Overtemperature warning
The maximum stepping speed is reduced to 300 Hz. This ensures a safe shut-off procedure if the temperature increases to shut-off temperature.
•
14
Overtemperature shut-off
ATA6830
4575C–BCD–05/03
ATA6830
Travel operation is suspended when overtemperature is detected. An error signal is sent
to the bus master via the bus. Operation can only restart after the supply voltage is shut
off.
•
Interruption of a stepping motor winding
The motor windings are only checked for interruption when supplied with hold current,
not during drive operation. The corresponding output is shut off. The other coil winding
is supplied with hold current. An error signal is sent. Operation can only restart after the
supply voltage is shut off.
•
Short circuit of a stepping motor winding
The corresponding output is shut off. The other coil winding is supplied with hold current. An error signal is sent. Operation can only restart after the supply voltage is shut
off.
•
Short circuit of an output to ground or VBAT
The corresponding output is shut off. The other coil winding is supplied with hold current. An error signal is sent. Operation can only restart after the supply voltage is shut
off.
An error signal is sent to the microcontroller by clamping the bus to ground for 3 seconds. If the error should occur during a data transmission, the above described
reactions will happen immediately except for the clamping. This will take place about
200 µs after the end of the stopbit of the lowbyte to guarantee a correct command recognintion in the second headlamp. The error signal timing is shown in Figure 15.
Figure 15. Error Signal Timing
MESSAGE FRAME
ERROR RESPONSE
ca. 9.2 ms
3s
1
Buslevel
0
Absolute Maximum Ratings
Parameters
Symbol
Value
Unit
Power supply (t < 400 ms)
VBAT
-0.3 to +45
V
DC power supply
VBAT
-0.3 to +28
V
DC output current
IOUT
±1.1
A
BUS input voltage
VBUS
-0.3 to VBAT +0.3
V
Human body model
ESD
2
kV
Charged device model
ESD
500
V
Storage temperature
TStg
-55 to +150
°C
Operating temperature
Top
-40 to +105
°C
Tjmax
+150
°C
Maximum junction temperature
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4575C–BCD–05/03
Thermal Resistance
Parameters
Symbol
Value
Unit
Thermal resistance junction-case
RthJC
5
K/W
Thermal resistance junction-ambient
RthJA
35
K/W
Symbol
Value
Unit
Operating Range
Parameters
Power supply range
Operating temperature range
VBAT
7 to 20
V
Top
-40 to +105
°C
Electrical Characteristics
No.
1
1.1
1.2
Parameters
Test Conditions
Pin
Symbol
Supply current
VBAT = 14 V
(no motor current)
1, 7,
15, 21
I_total
Supply voltage
Normal operation
1, 7,
15, 21
VBATsup
7.0
23
VVDD_13V
4.9
VBAT = 7.0 V
23
VVDD_7V
Threshold voltage
VBAT = 12.0 V, rising
edge
22
Threshold voltage
VBAT = 12 V, falling
edge
VDD voltage
1.4
VDD voltage
2.1
2.2
Typ.
Max.
Unit
Type*
4
7
mA
A
20
V
C
5.0
5.1
V
A
4.8
5.0
5.1
V
A
VLH_BUS_12
5.5
6.5
7.5
V
A
22
VHL_BUS_12
4.5
5.5
6.5
V
A
V
A
-400
-300
-220
µA
A
0.5
V
A
mA
A
Supply
1.3
2
Min.
Bus Port
2.3
Hysteresis
22
VHYS_BUS12
2.4
Input current
VBUS = 0 V
22
IOUT_BUS_8
Saturation voltage
IBUS = 2 mA, bus
clamping
22
VSAT_BUS_7
Pulldown current
At error condition
22
IPulldwn_7
2
COS = 100 pF ±5%
RSET = 20 kW ±1%
27
FOSC_13
340
400
460
kHz
A
Reference voltage
RSET = 20 kW ±1%
26
VRSET_13V
2.4
2.5
2.6
V
A
Reference voltage
VBAT = 7 V
26
VRSET_7V
2.3
2.5
2.6
V
A
3, 5,
17, 20
RDSon
1.2
1.7
W
B
2.5
2.6
3
3.1
4
4.1
4.2
5
5.1
1
Oscillator
Frequency
Reference
Full Bridges
RDSON
RDSON of half-bridge
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Note:
1. cmd = command
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ATA6830
Electrical Characteristics (Continued)
No.
Parameters
Test Conditions
Pin
Symbol
Max.
Unit
Type*
5.2
Output current
Output stage off
3, 5,
17, 20
ILEAK
10
µA
A
5.3
Output current
Hold mode
RSHUNT = 240 mW
3, 5,
17, 20
VSHUNT18
40
55
200
mA
B
5.4
Output current
Test mode
RSHUNT = 240 mW
3, 5,
17, 20
VSHUNT99
240
300
360
mA
B
5.5
Output current
Normal mode
RSHUNT = 240 mW
3, 5,
17, 20
VSHUNT182
500
550
600
mA
B
5.6
Output current
Normal mode
(T <0°C)
RSHUNT = 240 mW
3, 5,
17, 20
VSHUNT218
600
660
720
mA
B
5.7
Output current
Halfstep
compensation
RSHUNT = 240 mW
3, 5,
17, 20
VSHUNT257
700
780
860
mA
B
5.8
Output current
Halfstep compensation (T < 0°C)
RSHUNT = 240 mW
3, 5,
17, 20
VSHUNT309
840
936
1040
mA
B
5.9
Overcurrent threshold
Highside switch
3, 5,
17, 20
IOC_H
1.6
A
A
5.10
Overcurrent threshold
Lowside switch
3, 5,
17, 20
IOC_L
1.6
A
B
5.11
Chopper frequency
1/16
fcos
D
6
Min.
Typ.
Voltage Comparators
6.1
Threshold voltage
9.0 V comparator,
rising edge
1, 7,
15, 21
V9_UP
8.8
9.1
9.4
V
A
6.2
Threshold voltage
9.0 V comparator,
falling edge
1, 7,
15, 21
V9_DOWN
8.6
8.9
9.2
V
A
6.3
Hysteresis
9.0 V comparator
1, 7,
15, 21
V9_HYS
60
200
340
mV
A
6.4
Threshold voltage
9.5 V comparator,
rising edge
1, 7,
15, 21
V9_5_UP
9.3
9.6
9.9
V
A
6.5
Threshold voltage
9.5 V comparator,
falling edge
1, 7,
15, 21
V9_5_DOWN
9.1
9.4
9.7
V
A
6.6
Hysteresis
9.5 V comparator
1, 7,
15, 21
V9_5_HYS
60
200
340
mV
A
6.7
Threshold voltage
10.0 V comparator,
rising edge
1, 7,
15, 21
V10_UP
9.8
10.1
10.4
V
A
6.8
Threshold voltage
10.0 V comparator,
falling edge
1, 7,
15, 21
V10_DOWN
9.6
9.9
10.2
V
A
6.9
Hysteresis
10.0 V comparator
1, 7,
15, 21
V10_HYS
60
200
340
mV
A
6.10
Threshold voltage
10.5 V comparator,
rising edge
1, 7,
15, 21
V10_5_UP
10.35
10.65
10.95
V
A
6.11
Threshold voltage
10.5 V comparator,
falling edge
1, 7,
15, 21
V10_5_DOWN
10.15
10.45
10.75
V
A
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Note:
1. cmd = command
17
4575C–BCD–05/03
Electrical Characteristics (Continued)
No.
Parameters
Test Conditions
Pin
Symbol
Min.
Typ.
Max.
Unit
Type*
6.12
Hysteresis
10.5 V comparator
1, 7,
15, 21
V10_5_HYS
60
200
340
mV
A
6.13
Threshold voltage
11.0 V comparator,
rising edge
1, 7,
15, 21
V11_UP
10.8
11.1
11.4
V
A
6.14
Threshold voltage
11.0 V comparator,
falling edge
1, 7,
15, 21
V11_DOWN
10.6
10.9
11.2
V
A
6.15
Hysteresis
11.0 V comparator
1, 7,
15, 21
V11_HYS
60
200
340
mV
A
6.16
Threshold voltage
20.0 V comparator,
rising edge
1, 7,
15, 21
V20_UP
19.7
20.2
20.7
V
A
6.17
Threshold voltage
20.0 V comparator,
falling edge
1, 7,
15, 21
V20_DOWN
19.25
19.75
20.25
V
A
6.18
Hysteresis
20.0 V comparator
1, 7,
15, 21
V20_HYS
200
450
750
mV
A
6.19
Threshold voltage
Motor disable
(falling voltage)
1, 7,
15, 21
V9_DOWN
8.6
8.9
9.2
V
A
6.20
Threshold voltage
Motor enable
(rising voltage)
1, 7,
15, 21
V10_5_UP
10.35
10.65
10.95
V
A
6.21
Hyteresis
Undervoltage turn off
1, 7,
15, 21
MDIS_HYS
1.3
1.7
2.1
V
A
6.22
Distance
9.5 V to 9 V
comparator rising
edges
1, 7,
15, 21
D9.5-9_R
300
500
700
mV
A
6.23
Distance
9.5 V to 9 V
comparator falling
edges
1, 7,
15, 21
D9.5-9F
300
500
700
mV
A
6.24
Distance
10 V to 9.5 V
comparator rising
edges
1, 7,
15, 21
D10-9.5R
300
500
700
mV
A
6.25
Distance
10 V to 9.5 V
comparator falling
edges
1, 7,
15, 21
D10-9.5F
300
500
700
mV
A
6.26
Distance
10.5 V to 10 V
comparator rising
edges
1, 7,
15, 21
D10.5-10R
300
500
700
mV
A
6.27
Distance
10.5 V to 10 V
comparator falling
edges
1, 7,
15, 21
D10.5-10F
300
500
700
mV
A
6.28
Distance
11 V to 10.5 V
comparator rising
edges
1, 7,
15, 21
D11-10.5R
300
500
700
mV
A
6.29
Distance
11 V to 10.5 V
comparator falling
edges
1, 7,
15, 21
D11-10.5F
300
500
700
mV
A
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Note:
1. cmd = command
18
ATA6830
4575C–BCD–05/03
ATA6830
Electrical Characteristics (Continued)
No.
7
7.1
7.2
7.3
7.4
8
8.1
8.2
9
Parameters
Test Conditions
Pin
Symbol
Min.
Typ.
Max.
Unit
Type*
Baud rate
fcos = 340 to 460 kHz,
full synchronization
22
Baud
2350
2400
2450
Baud
C, D
Delay time
2 following
commands
22
TD
5
ms
C, D
Pause time
Between high and low
byte
22
TP
µs
C, D
Clamping time
Bus error clamping
22
Tcl
s
C, D
cmd (1)
D
cmd (1)
D
Timing
3
Logic
Reference run
detection
Commands in series
to execute first
reference run
Ref3
3
Synchronization
15% oscillator
tolerance
Sync
4
3
3
Thermal Values
9.1
Thermal prewarning
9.2
Hysteresis
9.3
Thermal shut down
9.5
Thermal current
boost
9.6
0
Hysteresis
Thermal prewarning
Thermal currrent
boost
T_150
150
°C
B
T_150HYS
10
°C
B
T_160
160
°C
B
T_0
0
°C
B
T_0_HYS
10
°C
B
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Note:
1. cmd = command
Soldering Recommendations
Parameters
Symbol
Value
Unit
Maximum heating rate
TD
1 to 3
°C/s
Peak temperature in preheat zone
TPH
100 to 140
°C
Duration of time above melting point of solder
tMP
minimum 10
maximum 75
s
Peak reflow temperature
TPeak
220 to 225
°C
Maximum cooling rate
TPeak
2 to 4
°C/s
19
4575C–BCD–05/03
Figure 16. Application Circuit
GND
IGN
BUS
D1
C6
C5
C4
R2
C3
C1
R3
C2
R4
R1
28
27
26
25
24
23
22
1
21
2
20
3
19
MLP 7x7mm
0.8mm pitch
ATA6830
28 lead
4
18
5
17
6
16
7
15
8
9
10
11
12
13
14
SM
20
ATA6830
4575C–BCD–05/03
ATA6830
Table 5. Bill of Material
Reference
Component
Value
C1
Oscillator capacitor
100 pF, 5%
C2
Bus input capacitor
1 nF
C3
Ceramic capacitor
100 nF
C4
Capacitor
10 µF
C5
Capacitor
100 µF
C6
Capacitor
100 nF
D1
Rectifier
–
R1
Reference resistor
20 kW, 1%
R2
Bus input resistor
1 kW, 5%
R3
Shunt resistor side A
0.24 W, 5%
R4
Shunt resistor side A
0.24 W, 5%
21
4575C–BCD–05/03
Ordering Information
Extended Type Number
Package
Remarks
ATA6830-PKH
QFN 28
7 mm ´ 7 mm
Package Information
The package is a thermal power package MLF 7 ´ 7 with a soldered leadframe and 28 pins. The overall size is 7 ´ 7 mm2.
22
ATA6830
4575C–BCD–05/03
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4575C–BCD–05/03
xM