NCV7430 LIN RGB Driver Using Auto?]addressing and High Current Evaluation Board User's Manual

NCV7430GEVB
NCV7430 LIN RGB Driver
Using Auto‐addressing and
High Current Evaluation
Board User's Manual
http://onsemi.com
Description
EVAL BOARD USER’S MANUAL
Recent customer requests have shown there is a need for an RGB
lighting driver device to operate in a fashion to allow the system to
assign an address after power-up to allow component changes after the
initial system assembly as an option to pre-programming prior to
assembly at the automotive manufacturer.
The NCV7430 auto-addressing evaluation board uses an approach
where the LIN communication bus is consecutively switched between
modules after an address has been assigned.
The target application for the NCV7430 LIN RGB BIAS pin is
defined for use as a thermal distribution device, but can find a use here
in providing the customer with a solution for auto-addressing of the
system board attached on LIN bus.
Additionally features to the board developed here allows for the
demonstration of external drivers for higher current LEDs and testing
of thermal compensation components as described in the NCV7430/D
data sheet.
Figure 1. Evaluation Board − Top View
Features
In addition to the NCV7430 part features, this evaluation board
highlights the following:
• Auto-addressing
• Increased Output Current
• Temperature Compensation
The board shown in Figure 2 has the on-board LED on the bottom
side of the board (U2). The external high current drivers (Q1, Q2, Q3)
for external LED control are not populated.
Details of schematic contents can be found in the upper-left portion
of the schematic (see Figure 4).
All boards are shipped with zero ohm resistors for D3, D4, and D5.
These can be replaced by customer specific schottky diodes for
thermal compensation.
WARNING:
This board should only be used for driving EITHER an external
LED with the NJVMJD253T4G drivers or the on-board
LRTB_G6TG LED.
USB
PC
Figure 2. Evaluation Board − Bottom View
Interface
Connector
USB2SPI Adapter
Target Board
Figure 3. Evaluation Board
© Semiconductor Components Industries, LLC, 2013
August, 2013 − Rev. 1
1
Publication Order Number:
EVBUM2198/D
Figure 4. NCV7430 Full Evaluation Board Schematic
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2
Master_in
Slave_out
TP5
GND
R6
1.2
NJVMJD253T4G
1
2
3
4
J1
1
2
3
4
J2
LED External
U2=Unpopulated
Q1=Q2=Q3=Populated
R6 thru R14 Populated
D3=D4=D5=Unpopulated
R1=R2=R3=R15=Unpopulated
Q1
TP1
LEDH1
Temperature Compensation
No Compensation
D3=D4=D5=0 ohms
R1=R2=R3=12 ohms
R15=Unpopulated
With Compensation
D3=D4=D5=Diode Populated
R1=R2=R3=9 ohms
R15=30 ohms
LED On−Board
U2=Populated
Q1=Q2=Q3=Unpopulated
R6 thru R14 Unpopulated
Options
R7
10
RED
R8
100
C3
10nF
R9
1.2
NJVMJD253T4G
MRA4003T3
D1
TP4
VBB
Q2
TP2
LEDH2
C2
100nF
R10
10
GREEN
100
R11
C1
100pF
R12
1.2
NJVMJD253T4G
Q3
TP3
LEDH3
NUP1105LT1G
DN1
R13
10
BLUE
100
R14
1
2
3
4
5
6
7
U1
LED3C
LED1C
LED2C
TST1
LED2R
LED1R
LED3R
NCV7430
ANODE
VBIAS
VBB
LIN
GND
TST2
GND
2n7002wt1g
M2
R4
24k
14
13
12
11
10
9
8
D3
C4
220pF
M1
1
2
3
ntr0202plt1g
R
B
6
5
4
R1
12
LRTB_G6TG
G
U2
R5
5.1k
body diode
R15
12
D4
mm3z20vt1g
D2
R2
12
D5
R3
12
NCV7430GEVB
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3
1
2
3
4
Slave_out
J4
1
2
3
4
Figure 5. NCV7430 Auto Addressing Board Schematic with on board LED
TP6
GND
Master_in
J3
C8
10nF
MRA4003T3
D10
TP10
VBB
C7
100nF
C6
100pF
DN2
NUP1105LT1G
1
2
3
4
5
6
7
LED3C
LED1C
LED2C
TST1
LED2R
LED1R
LED3R
14
13
12
11
10
9
8
1
2
3
R
6
5
4
R28
12
LRTB_G6TG
GB
U4
R17
5.1k
0 ohms
D7
C5
220pF
0 ohms
D8
R29
12
D6
mm3z20vt1g
0 ohms
D9
R30
12
Note − D3, D4, and D5 are populated with zero ohm resistors.
NCV7430
ANODE
VBIAS
VBB
LIN
GND
TST2
GND
U3
2n7002wt1g
M4
R16
24k
M3
ntr0202plt1g
body diode
NCV7430GEVB
4
1
2
3
4
Slave_out
J6
1
2
3
4
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TP14
LEDH1
Figure 6. NCV7430 High Current Board Schematic for High Current External LED
TP11
GND
R34
1.2
Q7
NJVMJD253T4G
Master_in
J5
R35
10
RED
100
R36
C10
100pF
R38
10
R40
1.2
R41
10
100
R42
BLUE
TP13
LEDH3
DN3
NUP1105LT1G
R37
Q9
R39
1.2
NJVMJD253T4G
100
GREEN
TP12
LEDH2
C11
100nF
Q8
NJVMJD253T4G
C12
10nF
MRA4003T3
D15
TP15
VBB
1
2
3
4
5
6
7
LED3C
LED1C
LED2C
TST1
LED2R
LED1R
LED3R
14
13
12
11
10
9
8
C9
220pF
R32
5.1k
D11
mm3z20vt1g
Note − D3, D4, and D5 are populated with zero ohm resistors.
NCV7430
ANODE
VBIAS
VBB
LIN
GND
TST2
GND
U5
2n7002wt1g
M6
R31
24k
M5
ntr0202plt1g
body diode
NCV7430GEVB
NCV7430GEVB
Table 1. ABSOLUTE MAXIMUM RATINGS
(The operation of the NCV7430 auto-addressing evaluation board works with the custom made ON Semiconductor USB2LIN board in
combination with the custom GUI interface. No additional power supply is needed other than the supplied 12 V AC/DC adapter which powers
the USB2LIN board through the RJ22 Connectors. An additional USB connector is used as the interface from the GUI to the USB2LIN board.)
Rating
Value
Unit
45 (max)
12 (typ)
V
USB Digital Supply Voltage
−0.3 to 5.5
V
NCV7430 LIN Interface Connector Pins
−45 to 45
V
2
A
Main Supply Voltage to USB2LIN Board (AC/DC Adapter)
4 Wire RJ11 Connector
VBB Supply Voltage (NCV7430)
−0.3 to 43
V
Junction Temperature (NCV7430)
−40 to 125
°C
Ambient Temperature (Evaluation Board)
−40 to 105
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
Figure 7. USB2LIN Power Jack
Table 2. RECOMMENDED OPERATING CONDITIONS
Value
Rating
Min
Max
Unit
External Digital Supply Voltage (VBB)
5.5
18
V
USB Supply Voltage (VBAT)
4.5
5.5
V
−
1 (Note 1)
A
−40
125
°C
LED DC Output Current (with External LED using NJVMJD253T4G)
Junction Temperature
1. Beta of the external driver at the specified operating temperature must be considered when operating at high currents in order to obtain the
system design goals.
Table 3. PIN FUNCTION DESCRIPTION
Connector
Pin Number
Terminal Name
Description
Pin Connections
(to be used with
external LEDs only)
1
VBB
ANODE connection for external LEDs.
2
Red
Red external LED CATHODE connection.
3
Green
4
Blue
Blue external LED CATHODE connection.
Test Points
5
GND
Ground
Communication
and Power
J1
Master_in
Connection input from USB2LIN or preceding board in the serial chain.
J2
Slave_out
Connection output to the next board in the serial chain.
Green external LED CATHODE connection.
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5
NCV7430GEVB
THEORY OF OPERATION
The auto-addressing feature of this evaluation board uses
the NTR0202PLT1G PFET device as a switch between
modules of the LIN bus. The board is configured such that
the master device connection should be made to the
Master-in node and the subsequent connection to the next
sequential modules should be made from the Slave_out.
Control of the switched node is directed by the ncv7430
device through the use of the VBIAS pin. VBIAS is low
during the initial power-up of the module. The body diode
of the switching transistor (NTR0202PLT1G) is sufficiently
high impedance to impede communication further down the
bus and orientated to provide reverse battery protection.
After the 1st module has been assigned an address, the
VBIAS pin goes high ultimately causing the switched
transistor to turn on which allows the 2nd module to see the
signal on the bus (through LIN Slave_out).
System Setup
Slave Device → (Module 1) [Master_in → Slave_out] →
(Module 2) [Master_in → Slave_out]
Body Diode
LIN
Master_in
NTR0202PLT1G
MM3Z20VT1G
MRA4003T3
12 V
+ Vbat/
− AC/DC
Converter
24 kW
5.1 kW
220 pF
2N7002WT1G
NCV7430
VBIAS
VBB
LIN
GND
Figure 8. Auto-addressing Interface
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6
LIN
Slave_out
NCV7430GEVB
Figure 9.
Operational Guidelines
board to the Master_in of a second NCV7430
auto-addressing board.
5. Initiate the GUI.
6. The initial address for the NCV7430 device is
AD0 (see Figure 10).
7. Move to the Node configuration tab.
Select a new address from the green matrix.
Program the new address.
Lock the new address with LOCKBT1
(see Figure 11).
8. The new address is programmed (see Figure 12).
9. In the middle column click the box for Ballast.
Click the Program OTP button.
Click the Read OTP button.
The BALLAST box should now be checked
(see Figure 13).
10. Select the device (AD47) and turn the device on
(see Figure 14).
11. Select the Network configuration tab.
Click the Scan network button.
The new board in the daisy chain should appear
(AD0). (see Figure 15)
The material necessary to successfully use the evaluation
boards is listed below:
• PC Running the Latest ON Semiconductor USB2LIN
GUI
• USB Cables Type A to Type B
• Interface Cables with 4 Wire RJ22 Connectors
• USB2LIN Interface Board
• NCV7430 Evaluation Board
• AC/DC 12 V Power Supply
At least 2 of the NCV7430 auto-addressing evaluation
boards will be needed to demonstrate the auto-addressing
feature.
1. Connect the USB cable to the computer which has
the USB2LIN GUI installed and to the USB2LIN
Interface Board.
2. Connect the AC/DC Power Supply to the
USB2LIN Interface Board.
3. Connect the RJ22 connector from the USB2LIN
Interface Board to the Master_in on the NCV7430
auto-addressing board.
4. Connect another RJ22 connector from the
Slave-out of the 1st NCV7430 auto-addressing
Repeat the process for each additional board which
requires a unique address.
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7
NCV7430GEVB
Figure 10. The Initial Address
Figure 11. Lock the New Address with LOCKBT1
Figure 12. The New Address is Programmed
Figure 13. The BALLAST Box is Checked
Figure 14. Select AD47 and Turn Device On
Figure 15. The New Board in the Daisy Chain
Should Appear
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8
NCV7430GEVB
Increasing the LED Operating Current
The NCV7430 device can be used as a control IC to drive
an external transistor thereby resulting in a higher LED drive
current. LED run current is limited to 32 mA/channel on the
device. By using this current as a drive current as shown in
Figure 16, the current can be increased to 32 mA times the
beta of the external bipolar transistor. Additionally, the three
outputs can be connected in parallel to provide a single
current source which is three times the single drive
capability (Reference Figure 18).
Current is programmed by the 325 mV (typ) voltage on
the LEDxR pin divided by the resistor value (R3).
TP4, VBB
TPx, LEDHx
Figure 17. High Current Operation
Temperature Compensation
VBB
ANODE
R1
LEDxC
D3, D4, and D5 which are normally provided here as zero
ohm resistors (reference schematic Figure 5, and board
bottom graphic Figure 21) can be replaced by schottky
diode transistors to provide compensation for thermal
effects of the LEDs. A footprint for each channel is provided
with an additional footprint (R15 connected from LED1R to
ground) to provide placement for an additional resistor for
better compensation of red LEDs. Reference the
NCV7430/D datasheet for further details.
An
ON Semiconductor MBR0520LT1G schottky diode has
been shown to provide temperature compensation for red
LEDs. But choice of the schottky diode components is
highly dependent on the LEDs designed into the system and
placement on the PC board relative to the LED.
NJVMJD253T4G
External
LED
100 W
NCV7430
R2
LEDxR
10 W
GND
R3
1.2 W
Figure 16. Higher Current Schematic
TP4, VBB
External
LED
TP1, LEDH1
VBB
TP2, LEDH2
TP3, LEDH3
ANODE
LED1C
NCV7430
LED2C
LED3C
LED3R
LED2R
LED1R
GND
R8
NJVMJD253T4G
100 W
R11
NJVMJD253T4G
100 W
R14
NJVMJD253T4G
100 W
R13, 10 W
R10, 10 W
R7, 10 W
R6
1.2 W
R9
1.2 W
Figure 18. Parallel Connections
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9
R12
1.2 W
NCV7430GEVB
EVALUATION BOARD LAYOUT
Figure 19. Silk Screen and Drill Holes
Figure 20. Copper − Top View
Figure 21. Copper − Bottom View
Figure 22. Board Composite
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10
NCV7430GEVB
Table 4. NCV7430 AUTO-ADDRESSING EVB WITH ON−BOARD LED BILL OF MATERIALS
Designator
Qty.
Description
Value
Tolerance
U1
1
NCV7430
SOIC−14
−
−
U2
1
RGB LED
C1
1
50 V LIN Filter
Capacitor
C2
1
C3
Footprint
Manufacturer
Manufacturet Part Number
Substitution
Allowed
ON Semiconductor
NCV7430D20G
No
−
LRTB_G6TG
OSRAM
LRTB G6TG
LRTB G6SF
Yes
100 pF
±5%
0603
Murata
GCM1885C1H101JA16D
Yes
50 V VBB Filter
Capacitor
100 nF
±10%
0603
Murata
GCM188R71H104KA57D
Yes
1
50 V VBAT Filter
Capacitor
10 nF
±10%
0603
Murata
GCM188R71H103KA37D
Yes
C4
1
50 V Auto-address
Switch Capacitor
220 pF
±5%
0603
Murata
GCM1885C1H221JA16D
Yes
D1
1
Reverse Battery
Diode
−
SMA_DIODE
ON Semiconductor
MRA4003T3
Yes
D2
1
FET Protection
Diode
−
SOD_323
ON Semiconductor
MM3Z20VT1G
Yes
ON Semiconductor
NUP1105LT1G
Yes
87180_044LF
Yes
NTR0202PLT1G
No
DN1
1
LIN Bus Protector
−
SOT23
J1, J2
2
RJ22 Right Angle
Socket
−
FCI_87180_044LF
M1
1
Auto-address
Switch
−
ntr0202plt1g
ON Semiconductor
M2
1
Driver Switch
R1, R2,
R3, R15
4
LED Current
Programming
Resistors
−
2n7002wt1g
ON Semiconductor
2N7002WT1G
Yes
12 W
±1%
0603
Vishay Dale
CRCW060312R0FKEA
Yes
R4
1
R5
1
Pull-up Resistor
24 kW
±1%
0603
Vishay Dale
CRCW060324K0FKEA
Yes
FET Drive Resistor
5.1 kW
±1%
0603
Vishay Dale
CRCW06035K10FKEA
Yes
TP1, TP2,
TP3, TP4
4
High Current
Connection
−
Turret
Mill Max
2501−2−00−44−00−00−07−0
Yes
D3, D4,
D5
3
Jumper
Jumper
SOD_123
Vishay Dale
CRCW08050000Z0EA
Yes
0W
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11
NCV7430GEVB
Table 5. NCV7430 HIGH CURRENT EVB BILL OF MATERIALS
Manufacturer
Manufacturet Part Number
Substitution
Allowed
ON Semiconductor
NCV7430D20G
No
0603
Murata
GCM1885C1H101JA16D
Yes
±10%
0603
Murata
GCM188R71H104KA57D
Yes
10 nF
±10%
0603
Murata
GCM188R71H103KA37D
Yes
220 pF
±5%
0603
Murata
GCM1885C1H221JA16D
Yes
Reverse Battery
Diode
−
SMA_DIODE
ON Semiconductor
MRA4003T3
Yes
1
FET Protection
Diode
−
SOD_323
ON Semiconductor
MM3Z20VT1G
Yes
ON Semiconductor
NUP1105LT1G
Yes
87180_044LF
Yes
NTR0202PLT1G
No
Designator
Qty.
Description
Value
Tolerance
U1
1
NCV7430
SOIC−14
−
−
C1
1
50 V LIN Filter
Capacitor
100 pF
±5%
C2
1
50 V VBB Filter
Capacitor
100 nF
C3
1
50 V VBAT Filter
Capacitor
C4
1
50 V Auto-address
Switch Capacitor
D1
1
D2
Footprint
DN1
1
LIN Bus Protector
−
SOT23
J1, J2
2
RJ22 Right Angle
Socket
−
FCI_87180_044LF
M1
1
Auto-address
Switch
−
ntr0202plt1g
ON Semiconductor
M2
1
Driver Switch
−
2n7002wt1g
ON Semiconductor
2N7002WT1G
Yes
Q1, Q2,
Q3
3
High LED Current
Driver
−
NJVMJD253T4G
ON Semiconductor
NJVMJD253T4G
No
R4
1
Pull-up Resistor
24 kW
±1%
0603
Vishay Dale
CRCW060324K0FKEA
Yes
R5
1
FET Drive Resistor
5.1 kW
±1%
0603
Vishay Dale
CRCW06035K10FKEA
Yes
R6, R9,
R12
3
High Current
Program Resistor
1.2 W
±1%
0805
Vishay Dale
CRCW08051R20FKEA
Yes
R7, R10,
R13
3
High Current
Feedback Resistor
10 W
±1%
0603
Vishay Dale
CRCW060310R0FKEA
Yes
R8, R11,
R14
3
PNP Drive Resistor
100 W
±1%
0603
Vishay Dale
CRCW0603100RFKEA
Yes
TP1, TP2,
TP3, TP4
4
High Current
Connection
−
Turret
Mill Max
2501−2−00−44−00−00−07−0
Yes
ON Semiconductor and
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particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without
limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications
and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC
does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for
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EVBUM2198/D