NCP1351LEDGEVB ON Semiconductor, NCP1351LEDGEVB Datasheet

EVAL BOARD FOR NCP1351LEDG

NCP1351LEDGEVB

Manufacturer Part Number
NCP1351LEDGEVB
Description
EVAL BOARD FOR NCP1351LEDG
Manufacturer
ON Semiconductor

Specifications of NCP1351LEDGEVB

Design Resources
NCP1351 EVB BOM NCP1351LEDGEVB Gerber Files NCP1351LED EVB Schematic
Current - Output / Channel
700mA
Outputs And Type
1, Isolated
Voltage - Output
33V
Features
Short-Circuit Protection
Voltage - Input
85 ~ 265 V
Utilized Ic / Part
NCP1351
Core Chip
NCP1351
Topology
Flyback
No. Of Outputs
1
Output Current
700mA
Output Voltage
33V
Development Tool Type
Hardware - Eval/Demo Board
Leaded Process Compatible
Yes
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
NCP1351LEDG
Other names
NCP1351LEDGEVBOS
Circuit Description
The NCP1351 controller provides for a low cost, variable
frequency, flyback converter. It incorporates a very low
quiescent current allowing for high value resistors to be
used as a start-up circuit direct from the HV rail.
The design comprises and input filter, bridge rectifier
(using low cost 1N4007 diodes), bulk capacitors and line
inductor in π-filter arrangement, the power stage,
rectifier diode and smoothing capacitors. Feedback is
CVCC, constant current drive for the LED’s with a
constant voltage in the event of an open circuit output.
In order to stay below IEC6100-3-2 Class C, the design
has been optimized at <25 W, so assuming 80%
efficiency the maximum output power is ~20 W.
September 2008, Rev. 2
Other Requirements
NCP1351
Device
Maximum Output Voltage
Nominal Current
Ripple
Solid State Lighting
Application
Cooling Method/Supply
Operating Temp Range
Signal Level Control
Target Efficiency
PFC (Yes/No)
Orientation
Max Size
Universal Input, 20 W, LED Ballast
Output 1
Input Voltage
Not Given
700 mA
85 – 265 Vac
33 V
Other Specifications
DN06040/D
www.onsemi.com
Output Power
LUXEON
LUXEON
LUXEON
LUXEON
Cree XR-E
Cree XP-E
OSRAM Platinum
Dragon
V
R12 & R13
Key Features
Note 1
LED’s in series
Z
Wide input voltage range – 85 Vac to 265 Vac
Small size, and low cost
Good line regulation
High efficiency
Overload and short circuit protection.
(D10)
80% at nominal load
Number of
125 x 37 x 35 mm
Out of LED specification
20 W
®
Convection
0 to +70°C
®
®
®
®
®
®
I
III
Rebel
K2
No
No
Design Note – DN06040/D
350 mA 700 mA
45 V
3R6
Topology
11
10
10
11
12
12
12
Flyback
33 V
1R8
LED Current
6
6
6
8
8
7
I/O Isolation
22 V
Note 1
Note 1
1R2
1 A
4
4
5
5
4
Yes
Note 1
1.5 A
Note 1
12 V
Note 1
Note 1
Note 1
0R8
2
1

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NCP1351LEDGEVB Summary of contents

Page 1

Device Application NCP1351 Solid State Lighting Maximum Output Voltage Ripple Nominal Current PFC (Yes/No) Target Efficiency Max Size Operating Temp Range Cooling Method/Supply Orientation Signal Level Control Other Requirements Circuit Description The NCP1351 controller provides for a low cost, variable ...

Page 2

September 2008, Rev. 2 DN06040/D Schematic www.onsemi.com 2 ...

Page 3

LED Current The light output of an LED is determined by the forward current so the control loop will be constant current, with a simple Zener to limit the maximum output voltage. Typical forward voltages vary by LED supplier, below ...

Page 4

VALLEY I AVE δ Looking at the waveform of the current flowing in the primary of the inductor (above define a term k equal to; Δ ...

Page 5

Rectifier snubber Testing demonstrated the need for snubbing on the rectifier as there was a large amount of ringing present after the rectifier turns off. The snubber consists of a resistor and capacitor in series, and knowing the junction capacitance ...

Page 6

... ON Semiconductor Project / Customer: Part Description Transformer - Schematic ID: EE25 Core Type: Gap for 250 µH Core Gap: 250 µH Inductance: NIC 10-pin vertical Bobbin Type: Windings (in order): Winding # / type N1, Primary N2, Secondary N3, Primary N4, Primary (Aux) Sleeving and insulation between primary and secondary as required to meet the requirements of double insulation. Primary leakage inductance (pins 6& ...

Page 7

... NIC NMC1206X7R105K50F ON Semiconductor 1N4007RLG ON Semiconductor 1N4007RLG ON Semiconductor 1N4007RLG ON Semiconductor 1N4007RLG ON Semiconductor MMSD4148T1G ON Semiconductor 1SMA5932BT3G ON Semiconductor MURA160T3G ON Semiconductor MMSD4148T1G ON Semiconductor MUR840G ON Semiconductor MM3Z33VT1G ON Semiconductor NCP1351BDR2G Agilent HCPL-817-W0AE Wurth/Midcom 744 662 0027 Keystone 8718 Phoenix 1985881 Aavid 577102B00000G Aavid 577102B00000G ON Semiconductor BC847ALT1G IR IRFBC40A ...

Page 8

Component Placement and PCB Layout September 2008, Rev. 2 DN06040/D Top view Bottom view Completed Demo Board, Side View www.onsemi.com 8 ...

Page 9

Turn-off in detail at 120 Vac, 230 Vac and 265 Vac September 2008, Rev. 2 DN06040/D Typical Operational Results 5 µs 100 230 120 Drain waveform at 120 Vac and ...

Page 10

Current Regulation versus Forward Voltage @ 700mA 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0 3.5 7 September 2008, Rev. 2 DN06040/D Typical Evaluation Results Efficiency ...

Page 11

... Disclaimer: ON Semiconductor is providing this design note “AS IS” and does not assume any liability arising from its use; nor does ON Semiconductor convey any license to its or any third party’s intellectual property rights. This document is provided only to assist customers in evaluation of the referenced circuit implementation and the recipient assumes all liability and risk associated with its use, including, but not limited to, compliance with all regulatory standards ...

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