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NCL30085 PDF даташит

Спецификация NCL30085 изготовлена ​​​​«ON Semiconductor» и имеет функцию, называемую «Power Factor Corrected Quasi-Resonant Primary Side Current-Mode Controller».

Детали детали

Номер произв NCL30085
Описание Power Factor Corrected Quasi-Resonant Primary Side Current-Mode Controller
Производители ON Semiconductor
логотип ON Semiconductor логотип 

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NCL30085 Даташит, Описание, Даташиты
NCL30085
Power Factor Corrected
Quasi-Resonant Primary
Side Current-Mode
Controller for LED Lighting
with Line Step Dimming and
www.onsemi.com
Thermal Foldback
8
The NCL30085 is a power factor corrected flyback controller
1
targeting isolated and non−isolated constant current LED drivers. The
controller operates in a quasi−resonant mode to provide optimal
SOIC−8 NB
CASE 751
efficiency. Thanks to a novel control method, the device is able to
tightly regulate a constant LED current from the primary side. This
MARKING DIAGRAM
removes the need for secondary side feedback circuitry, biasing and an
8
optocoupler.
The device is highly integrated with a minimum number of external
components. A robust suite of safety protection is built in to simplify
L30085x
ALYW
G
the design. This device is specifically intended for very compact,
1
space efficient designs and supports 3 levels of log step dimming
L30085x = Specific Device Code
which allows light output reduction by toggling the main AC switch
on and off to signal the controller to reduce the LED current point
down to 5% of full load.
x = A, B
A = Assembly Location
L = Wafer Lot
Y = Year
Features
Quasi−resonant Peak Current−mode Control Operation
W = Work Week
G = Pb-Free Package
Constant Current Control with Primary Side Feedback
Tight LED Constant Current Regulation of ±2% Typical
Power Factor Correction
PIN CONNECTIONS
1
ZCD
VCC
3 Step Dimming (70/25/5%)
VS DRV
Line Feedforward for Enhanced Regulation Accuracy
COMP
GND
Low Start−up Current (10 mA typ.)
Wide Vcc Range
300 mA / 500 mA Totem Pole Driver with 12 V Gate Clamp
SD CS
(Top View)
Robust Protection Features
OVP on VCC
Programmable Over Voltage / LED Open Circuit Protection
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 26 of this data sheet.
Cycle−by−cycle Peak Current Limit
Winding Short Circuit Protection
Secondary Diode Short Protection
Pb−Free, Halide−Free MSL1 Product
Output Short Circuit Protection
Current Sense Short Protection
User Programmable NTC Based Thermal Foldback
Typical Applications
Integral LED Bulbs and Tubes
Thermal Shutdown
LED Light Engines
Vcc Undervoltage Lockout
Brown−out Protection
LED Drivers/Power Supplies
© Semiconductor Components Industries, LLC, 2015
April, 2015 − Rev. 3
1
Publication Order Number:
NCL30085/D









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NCL30085 Даташит, Описание, Даташиты
NCL30085
Aux
.
.
.
NCL30085
18
27
36
45
Rsense
Figure 1. Typical Application Schematic for NCL30085
Table 1. PIN FUNCTION DESCRIPTION
Pin No Pin Name
Function
1
ZCD
Zero Crossing Detection
2 VS Input Voltage Sensing
3
COMP
Filtering Capacitor
4 SD Thermal Foldback and
Shutdown
5 CS
Current Sense
6 GND
7 DRV
Driver Output
8 VCC
IC Supply Pin
Pin Description
Connected to the auxiliary winding, this pin detects the core reset event.
This pin observes the input voltage rail and protects the LED driver in case of
too low mains conditions (brown−out).
This pin also observes the input voltage rail for:
− Power Factor Correction
− Valley lockout
− Step dimming
This pin receives a filtering capacitor for power factor correction. Typical values
ranges from 1 − 4.70 mF
Connecting an NTC to this pin allows the user to program thermal current fold-
back threshold and slope. A Zener diode can also be used to pull−up the pin
and stop the controller for adjustable OVP protection.
This pin monitors the primary peak current.
Controller ground pin.
The driver’s output to an external MOSFET
This pin is the positive supply of the IC. The circuit starts to operate when VCC
exceeds 18 V and turns off when VCC goes below 8.8 V (typical values). After
start−up, the operating range is 9.4 V up to 26 V (VCC(OVP) minimum level).
www.onsemi.com
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NCL30085 Даташит, Описание, Даташиты
NCL30085
Internal Circuit Architecture
Over Voltage Protection
(Auto−recovery or Latched)
Over Temp. Protection
(Auto−recovery or Latched)
SD
Thermal
Foldback
V TF
Aux_SCP
Internal
Thermal
Shutdown
Enable
Fault
Management
STOP
OFF
UVLO
Latch
VDD
VREF
VCC Management
VCC_max
WOD_SCP
BO_NOK
VCC Over Voltage
Protection
DRV
FF_mode
VVS
V REF
FF_mode
ZCD Zero Crossing Detection Logic
(ZCD Blanking, Time−Out, ...)
Valley Selection
Frequency Foldback
Aux. Winding Short Circuit Prot.
V VS
Aux_SCP
VREFX
CS_ok
S
Q
Q
VCC
Clamp
Circuit
Line
feed−forward
STOP
VVS
VREFX
R
CS Leading
Edge
Blanking
Power Factor and
Constant−Current
Control
CS_reset
Maximum
on time
Max. Peak
Current
Limit
Ipkmax
CS Short
Protection
CS_ok
Ipkmax STOP
t on,max
BO_NOK
STEP_DIM
Brown−Out
VVS
UVLO
t on,max
VREFX
Dimming
control
VREF
Winding and
Output diode
Short Circuit
Protection
WOD_SCP
VTF
Figure 2. Internal Circuit Architecture
VCC
DRV
COMP
VS
GND
www.onsemi.com
3










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