OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

NCL30000DR2G

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22
Semiconductor Components Industries, LLC, 2012
September, 2012 − Rev. 1
1 Publication Order Number:
NCL30000/D
NCL30000
Power Factor Corrected
Dimmable LED Driver
The NCL30000 is a switch mode power supply controller intended
for low to medium power single stage power factor (PF) corrected
LED Drivers. The device is designed to operate in critical conduction
mode (CrM) and is suitable for flyback as well as buck topologies.
Constant on time CrM operation is particularly suited for isolated
flyback LED applications as the control scheme is straightforward and
very high efficiency can be achieved even at low power levels. These
are important in LED lighting to comply with regulatory requirements
and meet overall system luminous efficacy requirements. In CrM, the
switching frequency will vary with line and load and switching losses
are low as recovery losses in the output rectifier are negligible since
the current goes to zero prior to reactivating the main MOSFET
switch.
The device features a programmable on time limiter, zero current
detect sense block, gate driver, trans-conductance error amplifier as
well as all PWM control circuitry and protection functions required to
implement a CrM switch mode power supply. Moreover, for high
efficiency, the device features low startup current enabling fast, low
loss charging of the V
CC
capacitor. The current sense protection
threshold has been set at 500 mV to minimize power dissipation in the
external sense resistor. To support the environmental operation range
of Solid State Lighting, the device is specified across a wide junction
temperature range of −40C to 125C.
Features
Very Low 24 mA Typical Startup Current
Constant On Time PWM Control
Cycle-by-Cycle Current Protection
Low Current Sense Threshold of 500 mV
Low 2 mA Typical Operating Current
Source 500 mA/Sink 800 mA Totem Pole Gate Driver
Reference Design for TRIAC and Trailing Edge Line Dimmers
Wide Operating Temperature Range
No Input Voltage Sensing Requirement
Enable Function and Overvoltage Protection
These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS
Compliant
Typical Applications
LED Driver Power Supplies
LED Based Down Lights
Commercial and Residential LED Fixtures
TRIAC Dimmable LED Based PAR Lamps
Power Factor Corrected Constant Voltage Supplies
http://onsemi.com
SOIC−8
CASE 751
MARKING DIAGRAM
PIN CONNECTION
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb-Free Package
L0000
ALYW
G
1
8
MFP
Comp
Ct
CS
V
CC
DRV
GND
ZCD
(Top View)
Device Package Shipping
†
ORDERING INFORMATION
†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.
NCL30000DR2G SOIC−8
(Pb−Free)
2,500/Tape & Reel
NCL30000
http://onsemi.com
2
+
Figure 1. Block Diagram
E/A
Demag
UVP
Fault
LEB
195 ns*
Off Timer
Reset
PWM
R
QS
(Enable EA)
DRV
Q
All SR Latches are Reset Dominant
ZCD
Clamp
OVP
V
CC
DRV
GND
mV
DD
V
CC
MFP
ZCD
C
t
CS
COMP
+
+
−
V
OVP
−
+
V
UVP
R
MFP
V
REF
+
g
m
−
+
V
Control
R
QS
Q
R
QS
Q
R
QS
Q
V
ZCD(TRIG)
−
+
+
V
ZCD(ARM)
+
+
−
+
−
+
V
DD
Add Ct
Offset
275 mA*
V
EAH
Clamp
−
+
180 ms*
V
CC
Management
V
DD
Power Good
mV
DD
OCP
V
ILIM
* Typical Values Shown
NCL30000
http://onsemi.com
3
Table 1. PIN FUNCTION DESCRIPTION
Pin Name Function
1 MFP The multi-function pin is connected to the internal error amplifier. By pulling this pin below the V
uvp
threshold, the
controller is disabled. In addition, this pin also has an over voltage comparator which will disable the controller in the
event of a fault.
2 COMP The COMP pin is the output of the internal error amplifier. A compensation network is connected between this pin
and ground to set the loop bandwidth. Normally this bandwidth is set at a low frequency (typically 10 Hz − 20 Hz) to
achieve high power factor and low total harmonic distortion (THD).
3 C
t
The C
t
pin sources a regulated current to charge an external timing capacitor. The PWM circuit controls the power
switch on time by comparing the C
t
voltage to an internal voltage derived from V
Control
. The C
T
pin discharges the
external timing capacitor at the end of the on time cycle.
4 CS The CS input is used to sense the instantaneous switch current in the external MOSFET. This signal is filtered by an
internal leading edge blanking circuit.
5 ZCD The voltage of an auxiliary zero current detection winding is sensed at this pin. When the ZCD control block circuit
detects that the winding has been demagnetized, a control signal is sent to the gate drive block to turn on the
external MOSFET.
6 GND This is the analog ground for the device. All bypassing components should be connected to the GND pin with a short
trace length.
7 DRV The high current capability of the totem pole gate drive (+0.5/−0.8 A) makes it suitable to effectively drive high gate
charge power MOSFETs. The driver stage provides both passive and active pull down circuits that force the output to
a voltage less than the turn-on threshold voltage of the power MOSFET when V
CC(on)
is not reached.
8 V
CC
This pin is the positive supply of the controller. The circuit starts to operate when V
CC
exceeds V
CC(on)
, nominally
12 V and turns off when V
CC
goes below V
CC(off)
, typically 9.5 V. After startup, the operating range is 10.2 V up to
20 V.
Q1
EMI
FILTER
1
2
3
4
8
7
6
5
C
in
R
CS
D
1
C
1
C
comp
C
tim
R
y
R
LED
R
ZCD
R
L
R
2
R
1
R
SU
MFP
COMP
VCC
DRV
GND
ZCD
C
T
CS
AC
Line
Input
D
out
C
OUT
R
c
R
t
R
a
R
b
R
x
GND
4
3
2
1
7
8
5
6
IN1+
NCS1002
IN1−
IN2−
IN2+
OUT1
OUT2
VCC
NCL30000
+
−
+
−
C
c
C
v
Figure 2. Simplified Flyback Application with Secondary side Constant Current Control
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22

NCL30000DR2G

Mfr. #:
Buy NCL30000DR2G
Manufacturer:
ON Semiconductor
Description:
LED Lighting Drivers PFC Dimmable LED Driver
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet