NCP12510
Current-Mode PWM
Controller for Off-line
Power Supplies
The NCP12510 is a highly integrated PWM controller capable of
delivering a rugged and high performance offline power supply in a
tiny TSOP−6 package. With a voltage supply range up to 35 V, the
controller hosts a jittered 65−kHz or 100−kHz switching circuitry
operated in peak current mode control. When the power on the
secondary side starts decreasing, the controller automatically folds
back its switching frequency down to a minimum level of 26 kHz. As
the power further goes down, the part enters skip cycle while limiting
the peak current.
Over Power Protection (OPP) is a difficult exercise especially when
no−load standby requirements drive the converter specifications. The
ON Semiconductor proprietary integrated OPP allows harness the
maximum delivered power without affecting the standby performance
simply via two external resistors. An Over Voltage Protection (OVP)
input is also combined on the same pin and protects the whole circuitry
in case of optocoupler destruction or adverse open loop operation.
Finally, a timer−based short−circuit protection offers the best
protection scheme, allowing precisely select the protection trip point
without caring of a loose coupling between the auxiliary and the power
windings.
www.onsemi.com
MARKING
DIAGRAM
TSOP−6
(SOT23−6)
SN SUFFIX
CASE 318G
5DxAYWG
G
1
1
STYLE 13
5Dx
x
A
= Specific Device Code
= A, 2, J, or K
= Assembly Location
= Year
= Work Week
= Pb−Free Package
Y
W
G
(Note: Microdot may be in either location)
PIN CONNECTIONS
NCP12510 is improved and pin compatible controller based on very
popular flyback controller NCP1250.
GND
FB
1
2
6
5
4
DRV
Features
V
CC
• Fixed−Frequency 65 kHz or 100 kHz Current−Mode Control
Operation
OPP/Latch
3
CS
• Frequency Foldback Down to 26 kHz and Skip−Cycle in Light Load
Conditions
(Top View)
• Frequency Jittering in Normal and Frequency Foldback Modes
• Internal and Adjustable Over Power Protection (OPP) Circuit
• Auto−Recovery Over Voltage Protection (OVP) on the VCC Pin
• Internal and Adjustable Slope Compensation
ORDERING INFORMATION
See detailed ordering, marking and shipping information on
page 2 of this data sheet.
• Internal Fixed 4 ms Soft−Start
• Auto−Recovery or Latched Short−Circuit Protection
• Pre−Short Ready for Latched OCP Version
• OVP/OTP Latch Input for Improved Robustness
• +300 mA/ −500 mA Source/Sink Drive Capability
• Improved Consumption
• EPS 2.0 Compliant
• This is a Pb−Free Device
Typical Applications
• Ac−dc Converters for TVs, Set−top Boxes and DVD
Players
• Improved Reset Time in Latch State
• Offline Adapters for Notebooks and Netbooks
• High Robustness and High ESD Capabilities
© Semiconductor Components Industries, LLC, 2016
1
Publication Order Number:
September, 2016 − Rev. 1
NCP12510/D