NCP11187A65P45WGEVB
45 W Auxiliary Power
Supply for White Goods and
Industrial Equipment with
NCP11187A65
www.onsemi.com
EVAL BOARD USER’S MANUAL
GENARAL SPECIFICATIONS
Devices
Applications
Topology
Output Power
Input Voltage
Output Spec.
NCP11187A65
White Goods and
Industrial Power
Supplies
Isolated Flyback
45 W
85–265 Vac
12 V/3.5 A
&
16 V/0.2 A
Package
Temperature
Operating
Temperature
Cooling
Method
Efficiency
Standby Power
Board Size
> 88%
@ Full−load
< 50 mW
@ 230 Vac
90°C
0–50°C
Natural Convection
In Open Frame
145 x 60 x 30 mm
3
2.83 W/inch
Description
Key Features
This user’s manual introduces not only performance of
a reference design with 45 W isolated flyback converter
using NCP11187 for auxiliary power supplies but also
provides key experimental results and information.
• Peak Current Mode Controller Integrated 800 V SJ−II
MOSFET, High Voltage Start−up, Soft−Start, and Slope
Compensation
• mWSaver
Technology
Best−in−Class Standby Power
Provides
Industry’s
NCP1118x is a highly enhanced switcher integrating
a peak current mode PWM controller employing
mWSavert and frequency reduction technology and
a highly robust 800 V Super−junction II MOSFET.
Additionally, it features a high−voltage startup circuit,
frequency reduction, slope compensation, constant output
power limit, and highly reliable and various protections. As
a results, it allows designing cost−effective off−line power
supplies using NCP1118x with less BOM counts and smaller
PCB size and high efficiency as well. Additionally, it could
get low standby power consumption less than typically
50 mW despite of multiple outputs.
On top of that, NCP1118x features variety of protections
for highly reliable power supply design such as a feedback
pin open−loop protection (OLP), current−sense resistor
short protection (CSSP), brown−out, line over−voltage
protection (Line−OVP) using an line voltage sensing pin
operated with auto−recovery operation and constant
over−power protection. This user’s manual demonstrates
those protections under various conditions.
• Switching Frequency Option: 65/100/130 kHz
• Proprietary Asynchronous Frequency Hopping
Technique for Low EMI
• Programmable Constant Output Power Limit for Entire
Input Voltage Range
• Precise Brown−out Protection and Line Over−voltage
Protection (LOVP) with Hysteresis
• Current Sense Short Protection (CSSP) and Abnormal
Over−Current Protection (AOCP)
• Thermal Shutdown (TSD) with Hysteresis
• All Protections Operated by Auto−recovery: VCC
Under−voltage Lockout (UVLO), Feedback Open−Loop
Protection (OLP), VCC Over−Voltage Protection (OVP)
© Semiconductor Components Industries, LLC, 2020
1
Publication Order Number:
August, 2020 − Rev. 1
EVBUM2740/D