DATA SHEET
www.onsemi.com
Current Mode PWM
Controller
MSOP10, 3x3
CASE 846AE
NCV12711
The NCV12711 is a fixed−frequency peak−current−mode PWM
controller containing all of the features necessary for implementing
single−ended power converter topologies. The device operates from
4 V to 45 V without auxiliary winding and within its thermal
capabilities. The controller contains a programmable oscillator
capable of operating from 100 kHz to 1 MHz and integrates slope
compensation to prevent subharmonic oscillations. The controller
includes a programmable soft−start, input voltage UVLO protection,
and an over−power protection (OPP) circuit which limits the total
power capability of the circuit as the input voltage increases. The
UVLO pin also features a shutdown comparator which allows for an
external signal to disable switching and brings the controller into a low
quiescent state. An onboard op−amp allows the implementation of
primary−side regulated converters or non−isolated dc−dc converters.
The NCV12711 contains a suite of protection features including
cycle−by−cycle peak−current limiting with smooth frequency increase
and a timer−based overload protection. All protection features place
the device into a low quiescent fault mode with a 1−s auto−recovery
period to allow for system recovery if the fault condition is removed.
MARKING DIAGRAM
10
V11x
AYWG
G
1
V11x
= Specific Device Code
= A
x
A
Y
W
G
= Assembly Location
= Year
= Work Week
= Pb−Free Package
PIN CONNECTIONS
UVLO
FB
1
2
3
10
9
Vin
Common General Features
• Wide V Input Range (4 – 45 V)
cc
VCC
DRV
GND
CS
• Internal 7.5−V Regulator
• Current−Mode Control with Adjustable Slope Compensation
• 0% Duty Ratio Operation in No−Load Condition
• Internal Over Power Protection
SS
8
RT
7
4
5
• Single Resistor Programmable Oscillator – 100 kHz to 1 MHz
• Adjustable Soft−Start on Peak Current and Frequency
• Programmable Input Voltage UVLO with Hysteresis
• Shutdown Threshold for External Disable
• Overload Protection with 30 ms Overload Timer
• Internal Operational Amplifier
• Fault Auto−recovery Mode with 1−s Auto−recovery Period
COMP
6
ORDERING INFORMATION
†
Device
NCV12711ADNR2G MSOP10, 3x3 2,500 / Tape
(Pb−Free) & Reel
Package
Shipping
•
1 A Source / Sink Gate Driver
• NCV Prefix for Automotive and Other Applications Requiring
Unique Site and Control Change Requirements; AEC−Q101
Qualified and PPAP Capable
†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.
Typical Applications
• Single−ended Flyback and Forward Converters for Electric Vehicles
• Automotive 4 − 45 V Input DC/DC Controller for Auxiliary Power
© Semiconductor Components Industries, LLC, 2021
1
Publication Order Number:
May, 2022 − Rev. 0
NCV12711/D