NCP5612GEVB
NCP5612GEVB Evaluation
Board User's Manual
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EVAL BOARD USER’S MANUAL
Description
This evaluation board manual contains:
The NCP5612 product is a dual output LED driver
dedicated to the LCD display backlighting. The built-in
DC-DC converter is based on a high efficient charge pump
structure with operating mode 1x and 1.5x.It provides a peak
87% efficiency together with a 0.2% LED to LED matching.
•
•
•
•
Bill of Materials
NCP5612 Demo Board V1.0 schematic diagram
NCP5612 Demo Board V1.0 GERBER views
Manufacturers’ web addresses
Figure 1. NCP5612GEVB Evaluation Board
−
Details of the Input Power Supply Pins & Digital Control Socket
©
Semiconductor Components Industries, LLC, 2012
February, 2012
−
Rev. 1
1
Publication Order Number:
EVBUM2016/D
NCP5612GEVB
C1
GND
4.7uF/10V
J1
2
1
POWER
GND
12
10
9
8
C4
1uF/10V
C2
C3
VBAT
220nF/6.3V
220nF/6.3V
TP2
VOUT
C1 N
C2N
C2 P
C1P
GND
7
VOUT
J2
2
4
6
8
10
1
3
5
7
9
TP1
CNTL
1
SP1
3
2
CNTL
11
6
Vbat
NC
U1
NCP5612
CNTL
IREF
Vout
5
4
S−WIRE PORT
GND
LED1
2
LED1
D1
LWY87S
1
IREFBK
GND
LED/ICON
3
LED2
D2
LWY87S
Z1
GND
GND
Figure 2. NCP5612GEVB Evaluation Board Schematic
10 k
R1
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NCP5612GEVB
Table 1. Bill of Materials
QTY
1
2
1
1
1
2
2
1
Designator
R1
C2, C3
C1
C4
U1
D1, D2
TP1, TP2
J2
Description
10 kW
220 nF / 10 V
4.7
mF
/ 10 V
1
mF
/ 10 V
NCP5612
LWY87S
Test Point
Control Port
Footprint
0603
0603
0805
0805
LLGA12
OSRAM_LED
TEST_POINT
IDC10
Manufacturer
Vishay Draloric
TDK
TDK
TDK
ON Semiconductor
OSRAM
KEYSTONE
3M Electronique
ANSLEY
1
J1
Connector
RAD0.4
KONTEK
COMATEL
HARWIN
C1005X5R1C224MT
C2012X5R1C475MT
C2012X5R1C105MT
NCP5612
LWY87S
5005 ( THM )
2510−6002 UG
4−1437044−3
3110014000500
Part Number
Comments
Any other suppliers possible
Reference design
Reference design
Reference design
Reference design
Reference design
RS = 203−4910
Do not assemble
RS = 120−7230
RS = 461−742
RS = 305−0907
(J2 is built with two pins as
depicted in the photo)
RS = 160−3745 (tin)
1
Z1
GROUND
GND_TEST
D3082−01 (tin)
D3082−05 (gold)
1.
RS = Radio Spares
2. any resistors with same footprint, tolerance up to
±5%
together with TC < 500 ppm and +1055°C operating temperature range can fit the
application.
3. using X5R type ceramic capacitor is preferred. Using X7R brings extended operating temperature range. Using Y5R material shall be
avoided due to the wide tolerance spread over the temperature range. Using smaller foot print capacitor is discouraged to avoid audible noise
issue with the ceramic.
ASSEMBLY
Note: the here attached photos are used as a visual reference:
1. Assemble the NCP5612 ( LLGA12 package) , Hot Air Flow Process mandatory
2. Assemble all the passive parts
3. Assemble all the White LED
4. Assemble the GROUND reference point
5. Assemble the control port IDC10 connector, make sure the connector is properly oriented: the white triangle, on the
PCB, is the pin 1 reference
6. Assemble the power supply pins.
At this point, the system is ready to operate.
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NCP5612GEVB
TEST CONDITIONS
Power Supply:
Connect a DC power supp ly , with 500 mA output current capability, across the two pins built with connector
J2. Make sure the polarity is properly respected:
reverse polarity will destroy the NCP5612.
Set up the power polarity to 3.6 V. Although the supply voltage can be adjusted between 2.85 V
−
5.5 V for engineering
purpose, the associated MCU test board is limited to 3.6 V: double check the power supply before to turn ON the supply.
Manufacturing Final Test:
1. Connect the IDC10/J1 connector to the external MCU board with the ribbon cable. Double check the power supply is
set up at 3.6 V,
maximum rating is 3.8 V.
2. The MCU board is powered by the same external DC supply once the ribbon cable ia attached on both boards.
3. Turn ON the power supply: LED D1 on the MCU board shall turn ON. Reset the MCU if necessary by pushing the
RESET button S7
4. Push control button F3: the ICON mode shall be activated, LED 2 being ON with a low current. At this point, the
current absorbed by the system shall be in the 4 mA range.
5. Push control button F1: the two LED shall be activated and the brightness can be increased by pushing the F1 control.
6. Push control button F2: the two LED shall be dimmed toward zero with consecutive pushes on the F2 command.
7. Push command F3: the ICON mode shall be activated, same as #4
Since bounces are generated by the manual push buttons, non linear operation can happen during the test. This is normal and
the part shall NOT be rejected for such a reason. The final test is complete when all the steps #4 to #7 are proven OK. It is not
necessary to cover all the sixteen steps to ramp up/ down the brightness: the system is fully debugged if the four tests mentioned
above are successful.
Digital Control:
it is possible to drive the NCP5612 by means of an external controller, leaving aside the MCU test package.
In this case, one shall connect an external pulse generator to connect J1 /IDC10. The external controller shall send the data
according to the SWIRE protocol depicted into the NCP5612 data sheet. The chip is capable to support a 100 kHz transfer rate.
System Operation:
1. Double check the power supply is set up between 3.0 V to 5.5 V,
make sure the external MCU can support the
same power supply range.
2. Turn ON the power supply
3. Send the appropriate data frame to control the two LED
Note: the MCU board is reserved for manufacturing only and is NOT provided with the NCP5612 evaluation board
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NCP5612GEVB
Figure 3. NCP5612GEVB Evaluation Board & MCU Controller Silk Views
Figure 4. NCP5612GEVB Evaluation Board: TOP & BOTTOM Views
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