NCP1370 Datasheet, PDF (1/19 Pages) ON Semiconductor – Dimmable Quasi-Resonant Primary Side Current-Mode Controller

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
QUASI−RESONANT PWM
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
CONTROLLER FOR
LED DRIVERS
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.
8
1
SOIC−8
D SUFFIX
CASE 751
MARKING
DIAGRAM
8
NCP1370x
ALYW
G
Features
• Quasi−resonant Peak Current−mode Control Operation
• Primary Side Sensing (no opto−coupler needed)
• Wide V_CC Range
• Source 300 mA / Sink 500 mA Totem Pole Driver with 12 V Gate
1
NCP1370 = Specific Device Code
x
= Device Option (A or B)
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W
= Work Week
Clamp
G
= Pb−Free Package
• Precise LED Constant Current Regulation ±1% Typical
• Line Feed−forward for Enhanced Regulation Accuracy
PIN CONNECTIONS
• Low LED Current Ripple
• 500 mV ±1.2% Guaranteed Voltage Reference for Current
Regulation
• Programmable Cycle−by−Cycle Peak Current Limit
• Low V_CC(on) Allowing to use a Standby Power Supply to Power the
Device
1
ILIM
ZCD
CS
GND
(Top View)
DIM
VIN
VCC
DRV
• Analog or Digital Dimming
• Wide Temperature Range of −40 to + 125°C
ORDERING INFORMATION
• Robust Protection Features
♦ LED Open Circuit Protection
See detailed ordering and shipping information in the package
dimensions section on page 18 of this data sheet.
♦ V_CC Over Voltage Protection
♦ Secondary Diode Short Protection
♦ Output Short Circuit Protection
♦ Shorted Current Sense Pin Fault Detection
♦ Brown−out
Typical Applications
♦ V_CC Under Voltage Lockout
♦ Thermal Shutdown
• Pb−free, Halide−free MSL1 Product
• TV Backlight
• Lighting with Auxiliary Power Supply
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
February, 2016 − Rev. P1
Publication Order Number:
NCP1370/D