© Semiconductor Components Industries, LLC, 2016
February, 2021 − Rev. 6
1 Publication Order Number:
NCP12510/D
Current-Mode PWM
Controller for Off-line
Power Supplies
NCP12510
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.
NCP12510 is improved and pin compatible controller based on very
popular flyback controller NCP1250.
Features
• Fixed−Frequency 65 kHz or 100 kHz Current−Mode Control
Operation
• Frequency Foldback Down to 26 kHz and Skip−Cycle in Light Load
Conditions
• 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
• 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
• Improved Reset Time in Latch State
• High Robustness and High ESD Capabilities
• EPS 2.0 Compliant
• This is a Pb−Free Device
Typical Applications
• Ac−dc Converters for TVs, Set−top Boxes and DVD
Players
• Offline Adapters for Notebooks and Netbooks
PIN CONNECTIONS
1
3
CS
GND
2
OPP/Latch
4
DRV
6
(Top View)
5
V
CC
TSOP−6
(SOT23−6)
SN SUFFIX
CASE 318G
STYLE 13
MARKING
DIAGRAM
FB
www.onsemi.com
(Note: Microdot may be in either location)
1
5DxAYWG
G
1
5Dx = Specific Device Code
x = A, 2, C, D, J, or K
A = Assembly Location
Y = Year
W = Work Week
G = Pb−Free Package
See detailed ordering, marking and shipping information on
page 2 of this data sheet.
ORDERING INFORMATION
NCP12510
www.onsemi.com
2
Figure 1. Typical Application Example
Table 1. PIN DESCRIPTION
Pin No Pin Name Function Pin Description
1 GND − The controller ground.
2 FB Feedback pin Hooking an optocoupler collector to this pin will allow regulation.
3 OPP/Latch Adjust the Over Power
Protection Latches off the part
A resistive divider from the auxiliary winding to this pin sets the OPP
compensation level during the on−time. When the voltage exceeds a certain
level at turn off, the part is fully latched off.
4 CS Current sense + slope
compensation
This pin monitors the primary peak current but also offers a means to
introduce slope compensation.
5 V
CC
Supplies the controller −
protects the IC
This pin is connected to an external auxiliary voltage. When the V
CC
exceeds a
certain level, the part enters an auto−recovery hiccup.
6 DRV Driver output The driver output to an external MOSFET gate.
Table 2. DEVICE OPTIONS AND ORDERING INFORMATION
Controller (Note 1)
Package
Marking
OCP protection
OVP/OTP
protection
Switching
Frequency
V
OVP
Package Shipping
†
NCP12510ASN65T1G 5DA Latched
w/o Pre−short
Latched 65 kHz 25.5 V
TSOP−6
(Pb−Free)
3000 /
Tape &
Reel
NCP12510BSN65T1G 5D2 Auto−recovery Latched 65 kHz 25.5 V
NCP12510CSN65T1G 5DC Auto−recovery Auto−recovery 65 kHz 25.5 V
NCP12510DSN65T1G 5DD Auto−recovery Latched 65 kHz 32 V
NCP12510ASN100T1G 5DJ Latched
w/o Pre−short
Latched 100 kHz 25.5 V
NCP12510BSN100T1G 5DK Auto−recovery Latched 100 kHz 25.5 V
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
1. Other options available upon customer request.