© Semiconductor Components Industries, LLC, 2018
June, 2018 − Rev. 0
1 Publication Order Number:
NCP12700/D
NCP12700
Ultra Wide Input Current
Mode PWM Controller
The NCP12700 is a fixed frequency, peak current mode, PWM
controller containing all of the features necessary for implementing
single−ended power converter topologies. The device features a high
voltage startup capable of operating over a wide input range and
supplying at least 15 mA to provide temporary bias to V
CC
during
system startup. The device contains a programmable oscillator
capable of operating from 100 kHz to 1 MHz and integrates slope
compensation to prevent subharmonic oscillations. The controller
offers an adjustable soft−start, input voltage UVLO protection, and an
adjustable Over−Power Protection circuit which limits the total power
capability of the circuit as the input voltage increases, easing the
system thermal design. The UVLO pin also features a shutdown
comparator which allows for an external signal to disable switching
and bring the controller into a low quiescent state.
The NCP12700 contains a suite of protection features including
cycle−by−cycle peak current limiting, timer−based overload
protection, and a FLT pin which can be interfaced with an NTC and an
auxiliary winding to provide system thermal protection and output
over−voltage protection. All protection features place the device into a
low quiescent fault mode and recovery from fault mode is dependent
on the device option.
Common General Features
• Wide Input Range (9 – 120/200 V; MSOP10/WQFN10)
• Startup Regulator Circuit with 15 mA Capability
• Current Mode Control with Integrated Slope Compensation
• Suitable for Flyback or Forward Converters
• Single Resistor Programmable Oscillator
• 1 A / 2.8 A Source / Sink Gate Driver
• User Adjustable Soft−Start Ramp
• Input Voltage UVLO with Hysteresis
• Shutdown Threshold for External Disable
• Skip Cycle Mode for Low Standby Power
• This is a Pb−Free Device
Fault Protection Features
• User Adjustable Over−Power Protection
• Overload Protection with 30 ms Overload Timer
• NTC−Compatible Fault Interface for Thermal
Protection
• Output OVP Fault Interface
• Fault Auto−recovery Mode with 1 s Auto−recovery
Period
Typical Applications
• Single−ended Power Converters including CCM/DCM
Flyback and Forward Converters
• Telecommunications Power Converters
• Industrial Power Converter Modules
• Transportation & Railway Power Modules
www.onsemi.com
MARKING DIAGRAMS
WQFN10
MT SUFFIX
CASE 511DV
See detailed ordering and shipping information in the package
dimensions section on page 4 of this data sheet.
ORDERING INFORMATION
MSOP
DN SUFFIX
CASE 846AE
1
12700 or 700 = Specific Device Code
x = A or B
A = Assembly Site
LL = Wafer Lot Number
YW = Assembly Start Week
G = Pb−Free Package
12700x
ALLYWG
G
1
10
700x
AYW
(Note: Microdot may be in either location)
