NCS29001DGEVB
NCS29001 Evaluation Board
User'sManual
Introduction
This document gives a detailed description of the
NCS29001 Evaluation Board (SOIC-14 package) with the
bill of materials, and board schematic. The appropriate lab
test setups are also provided.
The NCS29001 Evaluation Board has been designed for
a quick evaluation of the NCS29001 LCD backlight driver.
Among its main characteristics, this evaluation board has
been constructed to boost an input voltage of 24 V to drive
an output LED string of 76 V at 200 mA.
This document must be used with the NCS29001
datasheet available on www.onsemi.com. The datasheet
contains full technical details about the NCS29001
specifications and operation. The board is implemented in
two metal layers with FR-4 dielectric. The top and bottom
layers have thicknesses of 35 mm. The total PCB thickness
is 1.62 mm with dimensions of 95.4 mm by 63.5 mm.
This evaluation board can be used to evaluate the device
performance and it allows the user to place the NCS29001
device in a real application environment. While the intention
is to evaluate the device according to datasheet
specifications, it is important to take into account the
additional circuitry inherent to the setup which can affect
performance.
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EVAL BOARD USER’S MANUAL
Figure 1. Evaluation Board (not to scale)
EQUIPMENT
The following table details the equipment used in the context of this application note manual.
Table 1. EQUIPMENT
Description
Regulated Power Supply
Main Features
Example of Equipment
25 V / 5 A capability or greater
Qty.
Chroma 62012P−600−8
1
Multimeter
−
Agilent 34401A
1
Oscilloscope
−
Tektronix MSO2024
1
Current probe
−
Tektronix TCP202
1
Waveform generator
−
Tektronix AFG3102
1
Get Started…
• Attach output LED string (76 V total VF)
• Set VIN = 12 V and Vinductor = 24 V
• Bring device out of standby by applying high to low
• Turning on the device from standby will trigger
•
•
soft−start power up with smooth LED current ramp up
• LED brightness can be varied by adjusting duty cycle
transition on STBY pin
Turn on device by applying PWM signal to PWMin pin
(between 100 Hz and 300 Hz with 10% to 100% duty
cycle)
© Semiconductor Components Industries, LLC, 2013
September, 2013 − Rev. 0
1
on the PWM signal
Maximum LED current is set to 200 mA for this
application
Publication Order Number:
EVBUM2213/D
NCS29001DGEVB
SCHEMATIC
Figure 2 shows the NCS29001 in circuit as it is implemented on the evaluation board.
Figure 2. Evaluation Board Schematic
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2
NCS29001DGEVB
BILL OF MATERIAL
Table 2. BILL OF MATERIAL
Designator
Qty
Description
Value
Tolerance
C1
1
Aluminum Electrolytic
Capacitor
47 mF
Substitution
Allowed
Lead
Free
Footprint
Manufacturer
Manufacturer Part
Number
20%
16 mm
diameter
Panasonic
EEV−EB2C470SM
Yes
Yes
C2
1
Ceramic Chip Capacitor
10 mF
10%
1206
TDK
C3216X5R1H106K160AB
Yes
Yes
C5, C7
2
Ceramic Chip Capacitor
0.1 mF
10%
1206
TDK
C3216X7R1H104K
Yes
Yes
C6, C8
2
Ceramic Chip Capacitor
1 mF
20%
1206
TDK
C3216X7R1C105M
Yes
Yes
C4
1
Aluminum Electrolytic
Capacitor
Open
−
5 mm lead
spacing
−
−
−
−
C3
1
Ceramic Chip Capacitor
3.9 nF
5%
0805
TDK
C2012C0G1H392J060AA
Yes
Yes
C11
1
Ceramic Chip Capacitor
20 pF
5%
0805
AVX
08051A200JAT2A
Yes
Yes
L1
1
High Current Inductor
47 mH
15%
14.1 mm x
13.1 mm
Cooper
Bussman
HCR−470−R
Yes
Yes
R1
1
Through Hole Resistor
499 k
1%
1 mm lead
spacing
Yageo
MFR−25FBF52−499k
Yes
Yes
R2
1
Chip Resistor
4.99 k
1%
0805
Panasonic
ERJ−6ENF4991V
Yes
Yes
R3
1
Chip Resistor
3.9 R
1%
1206
Panasonic
ERJ−8RQF3R9V
Yes
Yes
R5
1
Chip Resistor
576 R
1%
0805
Panasonic
ERJ−6ENF5760V
Yes
Yes
R6
1
Chip Resistor
715 k
1%
0805
Panasonic
ERJ−6ENF7153V
Yes
Yes
R7
1
Chip Resistor
63.4 k
1%
0805
Panasonic
ERJ−6ENF6342V
Yes
Yes
R9, R11
2
Chip Resistor
Open
−
1210
−
−
−
−
R12
1
Chip Resistor
0.075 R
1%
1206
Panasonic
ERJ−L08UF75MV
Yes
Yes
R13
1
Chip Resistor
Open
−
0805
−
−
−
−
R14
1
Chip Resistor
0
1%
0805
Panasonic
ERJ−6GEY0R00V
Yes
Yes
M1, M2
2
Power MOSFET
N−Channel
−
−
DPAK
ON
Semiconductor
NDD05N50Z
Yes
Yes
D1
1
Ultra−Fast Power
Rectifier
−
−
Axial
Lead−2
ON
Semiconductor
MUR460G
Yes
Yes
J5, J6,
J8, J11,
J12, J17,
J19, J21
8
PCB Test Terminal, Red
−
−
Hole
diameter
1.7 mm
Keystone
5005
Yes
Yes
J1, J4
2
Header 2 pin, 0.1 inch
spacing
−
−
0.100 x 2
TE
Connectivity
647676−2
Yes
Yes
J24
1
Header 4 pin, 0.1 inch
spacing
−
−
0.100 x 4
TE
Connectivity
647676−4
Yes
Yes
J27, J28
2
PCB Shorting Link
−
−
GND_Strap
Harwin
D3082−46
Yes
Yes
U1
1
NCS29001
−
−
SOIC14
ON
Semiconductor
NCS29001DR2G
No
Yes
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3
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