NCL30081
Dimmable Quasi-Resonant
Primary Side Current-Mode
Controller for LED Lighting
The NCL30081 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 optocoupler.
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 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
reduce the light intensity in 5 steps down to 5% dimming.
Features
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TSOP−6
SN SUFFIX
CASE 318G
MARKING DIAGRAM
•
•
•
•
•
•
•
•
•
•
•
•
•
•
AAxAYWG
Quasi−resonant Peak Current−mode Control Operation
G
Primary Side Sensing (no optocoupler needed)
1
Wide V
CC
Range
AAx = Specific Device Code
Precise LED Constant Current Regulation
±1%
Typical
x
= G or H
Line Feed−forward for Enhanced Regulation Accuracy
A
= Assembly Location
Y
= Year
Low LED Current Ripple
W
= Work Week
250 mV
±2%
Guaranteed Voltage Reference for Current Regulation
G
= Pb−Free Package
~ 0.9 Power Factor with Valley Fill Input Stage
(Note: Microdot may be in either location)
Low Start−up Current (10
mA
typ.)
Small Space Saving Low Profile Package
PIN CONNECTIONS
5 State Quasi−log Dimmable
1
Wide Temperature Range of −40 to +125°C
ZCD
VIN
Pb−free, Halide−free MSL1 Product
GND
VCC
Robust Protection Features
DRV
CS
♦
Over Voltage / LED Open Circuit Protection
(Top View)
♦
Secondary Diode Short Protection
♦
Output Short Circuit Protection
♦
Shorted Current Sense Pin Fault Detection
Typical Applications
♦
Latched and Auto−recoverable Versions
•
Integral LED Bulbs
♦
Brown−out
•
LED Power Driver Supplies
♦
V
CC
Under Voltage Lockout
•
LED Light Engines
♦
Thermal Shutdown
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 30 of this data sheet.
©
Semiconductor Components Industries, LLC, 2015
1
January, 2015 − Rev. 1
Publication Order Number:
NCL30081/D
NCL30081
.
.
Aux
.
1
2
3
6
5
4
Figure 1. Typical Application Schematic for NCL30081
Table 1. PIN FUNCTION DESCRIPTION
Pin No
1
2
3
4
5
6
Pin Name
ZCD
GND
CS
DRV
VCC
VIN
Function
Zero Crossing Detection
−
Current sense
Driver output
Supplies the controller
Input voltage sensing
Brown−Out
Pin Description
Connected to the auxiliary winding, this pin detects the core reset event.
The controller ground
This pin monitors the primary peak current
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.
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2
NCL30081
STOP
Aux_SCP
CS_shorted
Internal
Thermal
Shutdown
Qdrv
Fault
Management
OFF
UVLO
Latch
VCC_max
Ipkmax
WOD_SCP
BO_NOK
V
VIN
V
REF
VCC
offset_OK
Valley Selection
Aux_SCP
V
VLY
R
V
REF
STEP_DIM
STOP
CS_reset
S
Q
Qdrv
Clamp
Circuit
DRV
V
DD
V
REF
GND
VCC
VCC Management
VCC Over Voltage
Protection
ZCD
Zero Crossing Detection
Aux. Winding
Short Circuit Protection
V
VIN
offset_OK
Line
Feedforward
CS
Leading
Edge
Blanking
Constant−Current
Control
Ipkmax
Max. Peak
Current
Limit
CS Short
Protection
Winding and
Output diode
Short Circuit
Protection
Ipkmax
STOP
V
VIN
Step
Dimming
VIN
Brown−Out
CS_shorted
STEP_DIM
V
VIN
BO_NOK
WOD_SCP
Figure 2. Internal Circuit Architecture
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NCL30081
Table 2. MAXIMUM RATINGS TABLE
Symbol
V
CC(MAX)
I
CC(MAX)
V
DRV(MAX)
I
DRV(MAX)
V
MAX
I
MAX
V
ZCD(MAX)
I
ZCD(MAX)
R
θJ−A
T
J(MAX)
Rating
Maximum Power Supply voltage, VCC pin, continuous voltage
Maximum current for VCC pin
Maximum driver pin voltage, DRV pin, continuous voltage
Maximum current for DRV pin
Maximum voltage on low power pins (except pins DRV and VCC)
Current range for low power pins (except pins ZCD, DRV and VCC)
Maximum voltage for ZCD pin
Maximum current for ZCD pin
Thermal Resistance, Junction−to−Air
Maximum Junction Temperature
Operating Temperature Range
Storage Temperature Range
ESD Capability, HBM model (Note 2)
ESD Capability, MM model (Note 2)
Value
−0.3, +35
Internally limited
−0.3, V
DRV
(Note 1)
−500, +800
−0.3, +5.5
−2, +5
−0.3, +10
−2, +5
360
150
−40 to +125
−60 to +150
4
200
Unit
V
mA
V
mA
V
mA
V
mA
°C/W
°C
°C
°C
kV
V
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
1. V
DRV
is the DRV clamp voltage V
DRV(high)
when V
CC
is higher than V
DRV(high)
. V
DRV
is V
CC
unless otherwise noted.
2. This device series contains ESD protection and exceeds the following tests: Human Body Model 4000 V per JEDEC JESD22−A114−F and
Machine Model Method 200 V per JEDEC JESD22−A115−A.
3. This device contains latch−up protection and exceeds 100 mA per JEDEC Standard JESD78 except for VIN pin which passes 60 mA.
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NCL30081
Table 3. ELECTRICAL CHARACTERISTICS
(Unless otherwise noted: For typical values T
J
= 25°C, V
CC
= 12 V;
For min/max values T
J
= −40°C to +125°C, Max T
J
= 150°C, V
CC
= 12 V)
Description
STARTUP AND SUPPLY CIRCUITS
Supply Voltage
Startup Threshold
Minimum Operating Voltage
Hysteresis V
CC(on)
– V
CC(off)
Internal logic reset
Over Voltage Protection
VCC OVP threshold
V
CC(off)
noise filter
V
CC(reset)
noise filter−
Startup current
Startup current in fault mode
Supply Current
Device Disabled/Fault
Device Enabled/No output load on pin 5
Device Switching (F
sw
= 65 kHz)
CURRENT SENSE
Maximum Internal current limit
Leading Edge Blanking Duration for V
ILIM
(T
j
= −25°C to 125°C)
Leading Edge Blanking Duration for V
ILIM
(T
j
= −40°C to 125°C)
Input Bias Current
Propagation delay from current detection to gate off−state
Threshold for immediate fault protection activation
Leading Edge Blanking Duration for V
CS(stop)
Blanking time for CS to GND short detection V
pinVIN
= 1 V
Blanking time for CS to GND short detection V
pinVIN
= 3.3 V
GATE DRIVE
Drive Resistance
DRV Sink
DRV Source
Drive current capability
DRV Sink (Note 4)
DRV Source (Note 4)
Rise Time (10% to 90%)
Fall Time (90% to 10%)
DRV Low Voltage
C
DRV
= 470 pF
C
DRV
= 470 pF
V
CC
= V
CC(off)
+0.2 V
C
DRV
= 470 pF,
R
DRV
= 33 kW
V
CC
= 30 V
C
DRV
= 470 pF,
R
DRV
= 33 kW
W
R
SNK
R
SRC
I
SNK
I
SRC
t
r
t
f
V
DRV(low)
–
–
–
–
–
–
8
13
30
500
300
40
30
–
–
–
mA
–
–
–
–
–
ns
ns
V
DRV high
V
ILIM
t
LEB
t
LEB
I
bias
t
ILIM
V
CS(stop)
t
BCS
t
CS(blank1)
t
CS(blank2)
0.95
250
240
–
–
1.35
–
8.0
2.6
1
300
300
0.02
50
1.5
120
–
–
1.05
350
350
–
150
1.65
–
14.0
4.6
V
ns
ns
mA
ns
V
ns
ms
ms
V
CC
> V
CC(off)
F
sw
= 65 kHz
C
DRV
= 470 pF,
F
sw
= 65 kHz
V
V
CC
increasing
V
CC
decreasing
V
CC
decreasing
V
CC(on)
V
CC(off)
V
CC(HYS)
V
CC(reset)
V
CC(OVP)
t
VCC(off)
t
VCC(reset)
I
CC(start)
I
CC(sFault)
I
CC1
I
CC2
I
CC3
16
8.2
8
3.5
26
–
–
–
–
0.8
–
–
18
8.8
–
4.5
28
5
20
13
46
1.0
2.15
2.6
20
9.4
–
5.5
30
–
–
30
60
1.4
4.0
5.0
V
ms
mA
mA
mA
Test Condition
Symbol
Min
Typ
Max
Unit
DRV High Voltage
V
DRV(high)
10
12
14
V
4. Guaranteed by design
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