NCP1370
Product Preview
Dimmable Quasi-Resonant
Primary Side Current-Mode
Controller for LED TV
Backlight
www.onsemi.com
The NCP1370 is a PWM current mode controller targeting isolated
flyback and non−isolated constant current topologies. The controller
operates in a quasi−resonant mode to provide high efficiency. Thanks
to a novel control method, the device is able to precisely regulate a
constant LED current from the primary side. This removes the need
for secondary side feedback circuitry, biasing and an opto−coupler.
The device is highly integrated with a minimum number of external
components. A robust suite of safety protection is built in to simplify
the design. This device supports analog/digital dimming and both
modes can be combined to enhance dimming precision. The NCP1370
has a programmable peak current limit to optimize design
compatibility over a wide range of applications. The controller
features a standby mode with reduced current consumption.
QUASI−RESONANT PWM
CONTROLLER FOR
LED DRIVERS
MARKING
DIAGRAM
8
SOIC−8
D SUFFIX
CASE 751
NCP1370x
ALYW
8
1
G
1
Features
NCP1370 = Specific Device Code
• Quasi−resonant Peak Current−mode Control Operation
• Primary Side Sensing (no opto−coupler needed)
x
A
L
= Device Option (A or B)
= Assembly Location
= Wafer Lot
• Wide V Range
CC
Y
W
G
= Year
= Work Week
= Pb−Free Package
• Source 300 mA / Sink 500 mA Totem Pole Driver with 12 V Gate
Clamp
• Precise LED Constant Current Regulation 1% Typical
• Line Feed−forward for Enhanced Regulation Accuracy
• Low LED Current Ripple
PIN CONNECTIONS
1
ILIM
DIM
VIN
• 500 mV 1.2% Guaranteed Voltage Reference for Current
ZCD
CS
Regulation
VCC
DRV
• Programmable Cycle−by−Cycle Peak Current Limit
GND
• Low V
Allowing to use a Standby Power Supply to Power the
CC(on)
(Top View)
Device
• Analog or Digital Dimming
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 18 of this data sheet.
• Wide Temperature Range of −40 to + 125°C
• Robust Protection Features
♦ LED Open Circuit Protection
♦ V Over Voltage Protection
CC
♦ Secondary Diode Short Protection
♦ Output Short Circuit Protection
♦ Shorted Current Sense Pin Fault Detection
♦ Brown−out
Typical Applications
♦ V Under Voltage Lockout
♦ Thermal Shutdown
• Pb−free, Halide−free MSL1 Product
• TV Backlight
• Lighting with Auxiliary Power Supply
CC
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
© Semiconductor Components Industries, LLC, 2016
1
Publication Order Number:
February, 2016 − Rev. P1
NCP1370/D