ncl30160 ON Semiconductor, ncl30160 Datasheet

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ncl30160

Manufacturer Part Number
ncl30160
Description
Constant Current Buck Regulator For Driving High Power Leds
Manufacturer
ON Semiconductor
Datasheet

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NCL30160
1.0A Constant-Current
Buck Regulator for Driving
High Power LEDs
driver for high power LEDs. Ideal for automotive, industrial and
general lighting applications utilizing minimal external components.
The NCL30160 operates with an input voltage range from 6.3 V to
40 V. The hysteretic control gives good power supply rejection and
fast response during load transients and PWM dimming to LED arrays
of varying number and type. A dedicated PWM input (DIM/EN)
enables wide range of pulsed dimming and a high switching frequency
up to 1.4 MHz allows the use of smaller external components
minimizing space and cost. Protection features include
resistor−programmed constant LED current, shorted LED protection,
under−voltage and thermal shutdown. The NCL30160 is available in a
SOIC−8 package.
Features
Typical Application
© Semiconductor Components Industries, LLC, 2012
January, 2012 − Rev. 1
The NCL30160 is an NFET hysteretic step−down, constant−current
Integrated 1.0A MOSFET
VIN Range 6.3 V to 40 V
Short LED Shutdown Protection
Up to 1.4 MHz Switching Frequency
No Control Loop Compensation Required
Adjustable LED Current
Single Pin Brightness and Enable/Disable Control Using PWM
Supports All−Ceramic Output Capacitors and Capacitor−less Outputs
Thermal Shutdown Protection
Capable of 100% Duty Cycle Operation
This is a Pb−Free Device
LED Driver
Constant Current Source
Automotive Lighting
General Illumination
Industrial Lighting
1
†For information on tape and reel specifications,
NCL30160DR2G
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
Device
ORDERING INFORMATION
A
L
Y
W
G
MARKING DIAGRAM
GND
PIN CONNECTIONS
VCC
http://onsemi.com
CS
CS
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
8
1
(Pb−Free)
SOIC−8 NB
Package
8
CASE 751
SOIC−8
ALYWX
30160
Publication Order Number:
G
1
2500 / Tape & Reel
LX
VIN
DIM/ENABLE
ROT
Shipping
NCL30160/D

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ncl30160 Summary of contents

Page 1

... LEDs. Ideal for automotive, industrial and general lighting applications utilizing minimal external components. The NCL30160 operates with an input voltage range from 6 The hysteretic control gives good power supply rejection and fast response during load transients and PWM dimming to LED arrays of varying number and type ...

Page 2

... Drain of Internal Power MOSFET D1 L1 … LED LED VIN LX DIM/Enable CS ROT NCL30160 R OT VCC GND C VCC Figure 1. Typical Application Circuit Application Information Set the current through the LED array by connecting a resistor from this pin to ground. Ground. Reference point for all voltages The VCC pin supplies the power to the internal circuitry ...

Page 3

MAXIMUM RATINGS Rating VIN to GND MOSFET Drain Voltage to GND VCC to GND DIM/EN to GND CS to GND ROT to GND Absolute Maximum Junction Temperature Operating Junction Temperature Range Maximum LED Drive Current Storage Temperature Range Thermal Characteristics ...

Page 4

ELECTRICAL CHARACTERISTICS Symbol SYSTEM PARAMETERS V Input Supply Voltage Range IN I Q_IN V Internal Regulator Output (Note Under−Voltage Lock−out Threshold UV+ V Under−Voltage Lock−out Threshold UV− CURRENT LIMIT AND REGULATION V CS Regulation Upper Limit CS_UL ...

Page 5

... Enable Pull−Up Resistor Short Circuit Protection Comparator Figure 2. Simplified Block Diagram (T = 25°C, Unless Otherwise Specified LED VIN DIM/Enable ROT NCL30160 R OT VCC C VCC http://onsemi.com 5 Gate Driver Peak Current Comparator 220 mV Valley Current Comparator 180 mV 500 ...

Page 6

... If the voltage on the CS pin is detected to be greater than 500 mV (equating to 2.5 times the intended average output current), the NCL31060 will turn off the FET, and prevent the FET from turning on again until power is recycled to NCL30160. http://onsemi.com 6 ...

Page 7

Figure 6. Short-Circuit Protection When V rises above the UVLO threshold voltage, IN switching operation of the FET will begin. However, until the V voltage reaches 8 V, the VCC regulator may not IN provide the expected gate drive voltage ...

Page 8

... Selecting The Off-Time Setting Resistor The off-time setting resistor (R NCL30160 with the initial time duration that the MOSFET is turned off when the switching operation begins. During subsequent switching cycles, the voltage at the CS pin is sensed every time the MOSFET is turned on, and the ...

Page 9

VIN (V) Figure 9. Efficiency, 350 mA, V 100 VIN (V) ...

Page 10

... C 1.35 1.75 0.053 0.069 D 0.33 0.51 0.013 0.020 G 1.27 BSC 0.050 BSC H 0.10 0.25 0.004 0.010 J 0.19 0.25 0.007 0.010 J K 0.40 1.27 0.016 0.050 0.25 0.50 0.010 0.020 S 5.80 6.20 0.228 0.244 mm inches ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative NCL30160/D _ ...

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