© Semiconductor Components Industries, LLC, 2016
August, 2016 − Rev. 0
1 Publication Order Number:
EVBUM2485/D
NCP12510B65GEVB
65 W Notebook Off-line
Adaptor with NCP12510
Evaluation Board User
Manual
Description
This evaluation board user manual describes the
NCP12510B65GEVB board and its main parameters, i.e.
efficiency, no−load input power consumption, EMI
signature, transient responses, etc.
The evolution board is a flyback topology converter
which provides output voltage 19 Vdc for output nominal
current up to 3.5 A, therefore, the nominal output power is
65 W. Input voltage range is recommended from 90 Vac up
to 265 Vac.
The switching of the converter is ensured by the
NCP12510 – fixed−frequency current−mode PWM
controller switching at 65 kHz. The frequency foldback
down to 26 kHz is implemented for achievement the high
efficiency during light load conditions. The skip cycle and
low supply current of the controller ensures the very low
no−load input power consumption (standby power) of the
converter, which is less than 40 mW without indication LED
on output.
The controller is also equipped with a lot of protections.
The standard protection is over−current protection which
disables the switching after fault timer is elapsed. This
protection is activated when over−current or short−circuit
conditions appear. In the case of damage of some component
important for regulation, the controller is equipped with fast
over−voltage protection on OPP pin (pin 3) and VCC pin
(pin 5). The controller protects the whole converter against
overheating by an NTC thermistor connected to the OPP pin
(pin 3). The protection against high power capability of
converter at high line is over−power protection. It is based
on reducing the internal peak current setpoint depending on
input voltage value.
Key Features
• Excellent Standby Power Consumption
• High Efficiency
• High Robustness and High ESD Capabilities
• Wide Input Voltage Range (90 – 265 Vac)
• Low EMI Emissions
• Over−Current Protection
• Over−Temperature Protection
• Over−Voltage Protection
• Over−Power Protection
Table 1. GENERAL PARAMETERS
Device Applications Input Voltage
Nominal Output
Voltage / Current
Output
Power
V
OUT
Ripple
NCP12510 Notebook Adaptors, Ac – dc
converters for consumer electronics
90 – 265 Vac 19 Vdc / 3.5 A
4.5 A max limit
65 W < 20 mV @ no load
and min input voltage
Efficiency Standby Power
Operating
Temperature
Cooling Topology Board Size
~91% 20 mW @ 120 Vac
31 mW @ 230 Vac
0 – 50°C Passive cooling Flyback 111 x 48 x 21 mm
www.onsemi.com
EVAL BOARD USER’S MANUAL
NCP12510B65GEVB
www.onsemi.com
2
Figure 1. 65 W Notebook Off−line Adaptor with NCP12510 – Evolution Board
Red
25V
105°C
25V
105°C
25V
105°C
NTCLE100E3104JB0
100K@25°C
5.8K@100°C
25V
105°C
Latch
WE
KA5038−BL
744 841 330
WE
744 823 220
470uF 470uF
100K
GND
1K
22R
24K
150K
8K2
4.7nF
4.7u/50V
T1.6A
220nF
MMSD4148
5n6/500V
470uF
1uH
1.2nF/250V
NU
0R
GND
2R2
2R2
30R
IPP60R380C6
330K330K
10K
430K
2n22n2
NTST30100SG
MMSZ15
1N4007
2x30uH
10K
10K
100uF/400V
10uF
680R
820443211E
4.7nF/630V
4.7nF/630V
68u/50V
2K7
220R
30K
SFH6156−4
330pF
100nF
GND
GBU4M
BAV70W
BAW56W
430K
BAV21
BAV21
NCP12510BSN65T1G
10R,2A
2x20mH
L2
BAV21
ICGND
AUXGND
PWRGND
AUXGND
30R
1R3
2n2
GND
NU
NU
NU
NCP432
+ 19V/3.5A
FB
FB
FB
C16 C17
NTC
R14
R15
R7
R6
R5
C2
C10
F1
CX1
D3
C20
C18
L3
C5
C1
R2
R16
R24
R8
Q1
R25R26
R17
R11
CY2
CY3
D2
D7
D1
1
23
4
L1
R19
R18
R27
R28
R29
TR1
CB1
C19
R1
RV1
C14
C15
C11
R10
R13
R4
LED
IC3
1
23
4
C13
C9
B1
AC2
AC1
− +
D8
D9
R12
D4
D6
OPP/
3
FB
2
CS
4
GND
1
DRV
6
VCC
5
IC1
RT1
D5
R9
R30
SJ1
21
2
1
SJ2
OUT
GND
CY1
R3
IC2
+
+
+
+
1/2 VIN
1/2 VIN
AUX
connected on PCB
pins 2 & 3
+
Connected
by wire − option
PENL
3mm
1R31R31R3
P2P1
C4C3
C6 C7
1.5nF
330pF
R20 R21
2M22M2