NCL30083 PDF даташит
Спецификация NCL30083 изготовлена «ON Semiconductor» и имеет функцию, называемую «Dimmable Quasi-Resonant Primary Side Current-Mode Controller». |
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Детали детали
Номер произв | NCL30083 |
Описание | Dimmable Quasi-Resonant Primary Side Current-Mode Controller |
Производители | ON Semiconductor |
логотип |
30 Pages
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NCL30083
Dimmable Quasi-Resonant
Primary Side Current-Mode
Controller for LED Lighting
with Thermal Fold-back
The NCL30083 is a PWM current mode controller targeting isolated
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flyback and non−isolated constant current topologies. The controller
operates in a quasi−resonant mode to provide high efficiency. Thanks
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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 optocoupler.
1
Micro8
DM SUFFIX
1
SOIC−8
D SUFFIX
The device is highly integrated with a minimum number of external
CASE 846A
CASE 751
components. A robust suite of safety protection is built in to simplify
the design. This device is specifically intended for very compact space
efficient designs. It supports step dimming by monitoring the AC line
and detecting when the line has been toggled on−off−on by the user to
MARKING DIAGRAM
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reduce the light intensity in 5 steps down to 5% dimming.
AAx
Features
• Quasi−resonant Peak Current−mode Control Operation
• Primary Side Sensing (no optocoupler needed)
• Wide VCC Range
• 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
AYWG
G
1
AAx = Specific Device Code
x = E or F
A = Assembly Location
Y = Year
W = Work Week
G = Pb−Free Package
(Note: Microdot may be in either location)
• 250 mV ±2% Guaranteed Voltage Reference for Current Regulation
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• ~ 0.9 Power Factor with Valley Fill Input Stage
• Low Start−up Current (13 mA typ.)
• 5 State Quasi−log Dimmable
L30083x
ALYW
G
1
• Thermal Fold−back
• Programmable soft−start
• Wide Temperature Range of −40 to +125°C
L30083x = Specific Device Code
x =B
A = Assembly Location
L = Wafer Lot
• Pb−free, Halide−free MSL1 Product
• Robust Protection Features
♦ Over Voltage / LED Open Circuit Protection
Y = Year
W = Work Week
G = Pb−Free Package
♦ Latched and Auto−recoverable Versions
♦ Over Temperature Protection
♦ Brown−out
♦ Secondary Diode Short Protection
♦ Output Short Circuit Protection
♦ Shorted Current Sense Pin Fault Detection
Typical Applications
• Integral LED Bulbs
♦ VCC Under VoltagPeILNoCckOoNuNt ECTIONS
♦ Thermal Shutdown 1
SD
SS
ZCD
VIN
CS VCC
GND
DRV
• LED Power Driver Supplies
(Top View)
• LED Light Engines
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 35 of this data sheet.
© Semiconductor Components Industries, LLC, 2015
January, 2015 − Rev. 2
1
Publication Order Number:
NCL30083/D
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NCL30083
Aux
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.
.
18
27
36
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Figure 1. Typical Application Schematic for NCL30083
Table 1. PIN FUNCTION DESCRIPTION
Pin No Pin Name
Function
1 SD Thermal Fold−back
and shutdown
2
ZCD
Zero Crossing Detection
3 CS
Current sense
4 GND
−
5 DRV
Driver output
6
VCC
Supplies the controller
7 VIN
Brown−Out
Input voltage sensing
8 SS
Soft−Start
Pin Description
Connecting an NTC to this pin allows reducing the output current down to 50%
of its fixed value before stopping the controller. A Zener diode can also be
used to pull−up the pin and stop the controller for adjustable OVP protection
Connected to the auxiliary winding, this pin detects the core reset event.
This pin monitors the primary peak current
The controller ground
The current capability of the totem pole gate drive (+0.3/−0.5 A) makes it suit-
able to effectively drive a broad range of power MOSFETs.
This pin is connected to an external auxiliary voltage.
This pin observes the HV rail and is used in valley selection. This pin also
monitors and protects for low mains conditions.
A capacitor connected to ground select the soft−start duration.
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NCL30083
SD
ZCD
CS
GND
Over Voltage
Protection
Over Temperature
Protection
Thermal
Foldback
VTF
Qdrv
Zero Crossing Detection
Aux. Winding
Short Circuit Prot.
VVIN offset_OK
CS_shorted Enable
STOP
VDD
VREF
Aux_SCP
Fault
Management
OFF
UVLO
Latch
VCC Management
Internal
Thermal
Shutdown
Aux_SCP
Ipkmax
VVIN VREF
VCC_max
WOD_SCP
BO_NOK
VCC Over Voltage
Protection
VCC
Valley Selection
offset_OK
S Qdrv
Q
Clamp
Circuit
VVLY
Line
Feedforward
VTF STOP VREF
R
Leading
Edge
Blanking
VVIN
Constant−Current
Control
CS_reset
Ipkmax STOP
Enable VSST STEP_DIM
Max. Peak
Current
Limit
Ipkmax
CS Short
Protection
CS_shorted
STEP_DIM
Winding and
Output diode
Short Circuit
Protection
WOD_SCP
VSST
Soft−Start
Enable
VVIN
Step
Dimming
Brown−Out
BO_NOK
VCC
DRV
SS
VIN
Figure 2. Internal Circuit Architecture
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