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PDF NCL30081B Data sheet ( Hoja de datos )
| Número de pieza | NCL30081B | |
| Descripción | Dimmable Quasi-Resonant Primary Side Current-Mode Controller | |
| Fabricantes | ON Semiconductor | |
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NCL30081
Product Preview
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
http://onsemi.com
1
TSOP−6
SN SUFFIX
CASE 318G
MARKING DIAGRAM
AAxAYWG
G
• Quasi−resonant Peak Current−mode Control Operation
1
• Primary Side Sensing (no optocoupler needed)
• Wide VCC Range
• Precise LED Constant Current Regulation ±1% Typical
• Line Feed−forward for Enhanced Regulation Accuracy
• Low LED Current Ripple
• 250 mV ±2% Guaranteed Voltage Reference for Current Regulation
AAx = Specific Device Code
x = G or H
A = Assembly Location
Y = Year
W = Work Week
G = Pb−Free Package
(Note: Microdot may be in either location)
• ~ 0.9 Power Factor with Valley Fill Input Stage
• Low Start−up Current (10 mA typ.)
• Small Space Saving Low Profile Package
• 5 State Quasi−log Dimmable
• Wide Temperature Range of −40 to +125°C
PIN CONNECTIONS
1
ZCD
VIN
GND
VCC
• Pb−free, Halide−free MSL1 Product
CS DRV
• Robust Protection Features
♦ Over Voltage / LED Open Circuit Protection
♦ Secondary Diode Short Protection
♦ Output Short Circuit Protection
♦ Shorted Current Sense Pin Fault Detection
♦ Latched and Auto−recoverable Versions
♦ Brown−out
♦ VCC Under Voltage Lockout
♦ Thermal Shutdown
(Top View)
Typical Applications
• Integral LED Bulbs
• LED Power Driver Supplies
• LED Light Engines
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, 2013
January, 2013 − Rev. P0
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 23 of this data sheet.
1 Publication Order Number:
NCL30081/D
1 page  
NCL30081
Table 3. ELECTRICAL CHARACTERISTICS (Unless otherwise noted: For typical values TJ = 25°C, VCC = 12 V;
For min/max values TJ = −40°C to +125°C, Max TJ = 150°C, VCC = 12 V)
Description
Test Condition
Symbol
Min Typ
STARTUP AND SUPPLY CIRCUITS
Supply Voltage
Startup Threshold
Minimum Operating Voltage
Hysteresis VCC(on) – VCC(off)
Internal logic reset
Over Voltage Protection
VCC OVP threshold
VCC increasing
VCC decreasing
VCC decreasing
VCC(on)
VCC(off)
VCC(HYS)
VCC(reset)
VCC(OVP)
16 18
8.2 8.8
8–
3.5 4.5
26 28
VCC(off) noise filter
VCC(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 (Fsw = 65 kHz)
VCC > VCC(off)
Fsw = 65 kHz
CDRV = 470 pF,
Fsw = 65 kHz
tVCC(off)
tVCC(reset)
ICC(start)
ICC(sFault)
ICC1
ICC2
ICC3
–5
– 20
– 13
– 46
0.8 1.0
– 2.15
– 2.6
CURRENT SENSE
Maximum Internal current limit
Leading Edge
(Tj = −25°C to
Blanking
125°C)
Duration
for
VILIM
VILIM
tLEB
0.95 1
250 300
Leading Edge
(Tj = −40°C to
Blanking
125°C)
Duration
for
VILIM
tLEB 240 300
Input Bias Current
Propagation delay from current detection to gate off−state
Threshold for immediate fault protection activation
Leading Edge Blanking Duration for VCS(stop)
Blanking time for CS to GND short detection VpinVIN = 1 V
Blanking time for CS to GND short detection VpinVIN = 3.3 V
GATE DRIVE
DRV high
Ibias
tILIM
VCS(stop)
tBCS
tCS(blank1)
tCS(blank2)
– 0.02
– 50
1.35 1.5
– 120
8.0 –
2.6 –
Drive Resistance
DRV Sink
DRV Source
RSNK
RSRC
– 13
– 30
Drive current capability
DRV Sink (Note 4)
DRV Source (Note 4)
Rise Time (10% to 90%)
Fall Time (90% to 10%)
DRV Low Voltage
DRV High Voltage
4. Guaranteed by design
CDRV = 470 pF
CDRV = 470 pF
VCC = VCC(off)+0.2 V
CDRV = 470 pF,
RDRV = 33 kW
CDVRCVC==43700
V
pF,
RDRV = 33 kW
ISNK
ISRC
tr
tf
VDRV(low)
VDRV(high)
– 500
– 300
– 40
– 30
8–
10 12
Max Unit
V
20
9.4
–
5.5
30 V
– ms
–
30 mA
60 mA
mA
1.4
4.0
5.0
1.05 V
350 ns
350 ns
– mA
150 ns
1.65 V
– ns
14.0 ms
4.6 ms
W
–
–
mA
–
–
– ns
– ns
–V
14 V
http://onsemi.com
5
5 Page 
NCL30081
Internal Soft−Start
At startup or after recovering from a fault, there is a small
internal soft−start of 40 ms.
In addition, during startup, as the output voltage is zero
volts, the demagnetization time is long and the constant
current control block will slowly increase the peak current
towards its nominal value as the output voltage grows.
Figure 5 shows a soft−start simulation example for a 9 W
LED power supply.
16.0
12.0 1 Vout
8.00
4.00
0
800m
600m
400m
200m
0
2 Iout
800m
600m
400m
200m
0
4 VControl
604u
1.47m
2.34m
time in seconds
3.21m
Figure 5. Startup Simulation Showing the Natural Soft−start
4.07m
3 VCS
Cycle−by−Cycle Current Limit
When the current sense voltage exceeds the internal
threshold VILIM, the MOSFET is turned off for the rest of the
switching cycle (Figure 6).
Winding and Output Diode Short−Circuit Protection
In parallel with the cycle−by−cycle sensing of the CS pin,
another comparator with a reduced LEB (tBCS) and a higher
threshold (1.5 V typical) is able to sense winding
short−circuit and immediately stops the DRV pulses. The
controller goes into auto−recovery mode in version B.
In version A, the controller is latched. In latch mode, the
DRV pulses stop and VCC ramps up and down. The circuit
un−latches when VCC pin voltage drops below VCC(reset)
threshold.
http://onsemi.com
11
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| PDF Descargar | [ Datasheet NCL30081B.PDF ] | |
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