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PDF CAT4101 Data sheet ( Hoja de datos )
| Número de pieza | CAT4101 | |
| Descripción | 1A Constant-Current LED Driver | |
| Fabricantes | ON Semiconductor | |
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CAT4101
1 A Constant-Current LED
Driver with PWM Dimming
Description
The CAT4101 is a constant−current sink driving a string of
high−brightness LEDs up to 1 A with very low dropout of 0.5 V at full
load. It requires no inductor, provides a low noise operation and
minimizes the number of components. The LED current is set by an
external resistor connected to the RSET pin. The LED pin is
compatible with high voltage up to 25 V, allowing the driving of long
strings of LEDs. The device ensures an accurate and regulated current
in the LEDs independent of supply and LED forward voltage
variation.
The PWM/EN input allows the device shutdown and the LED
brightness adjustment by using an external pulse width modulation
(PWM) signal.
The driver features a thermal shutdown protection that becomes
active whenever the die temperature exceeds 150°C.
The device is available in a high−power, 5−lead TO−263 package
offering excellent thermal dissipation characteristics.
Features
• Accurate 1 A Current Sink
• Up to 25 V Operation on LED Pin
• Low Dropout 500 mV at 1 A
• LED Current Set by External Resistor
• High Resolution PWM Dimming via EN/PWM
• “Zero” Current Shutdown Mode
• Thermal Shutdown Protection
• TO−263 (D2PAK) 5−lead Package
• This Device is Pb−Free, Halogen Free/BFR Free and is RoHS
Compliant
Applications
• High Power LED up to 1 A
• Architectural and General Lighting
• Automotive Lighting
VCC
3 V to 25 V
LEDs
VIN
5V
OFF ON
VIN
CAT4101
EN/PWM LED
1A
549 W
RSET
GND
Figure 1. Typical Application Circuit
© Semiconductor Components Industries, LLC, 2012
July, 2012 − Rev. 8
1
http://onsemi.com
D2PAK 5
(TO−263, 5 LEAD)
TV SUFFIX
CASE 418AH
EN/PWM
VIN
GND
RSET
LED
PIN CONNECTIONS
1
(Top View)
MARKING DIAGRAM
TAB
CAT4101TV
XXXXXXXXX
1
CAT4101TV = Specific Device Code
XXXXXXXXX = Internal Traceability
ORDERING INFORMATION
Device
Package
Shipping†
CAT4101TV−T75
TO−263
750 /
(D2PAK, 5 Lead) Tape & Reel
(Pb−Free)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
Publication Order Number:
CAT4101/D
1 page  
CAT4101
TYPICAL PERFORMANCE CHARACTERISTICS
(VIN = 5 V, VCC = 5 V, VF = 3.5 V, ILED = 1 A (1 LED), CIN = 1 mF, TAMB = 25°C unless otherwise specified.)
1.30 1.30
1.25 1.25
1.20 1.20
1.15 1.15
1.10
3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
Figure 9. RSET Pin Voltage vs. VIN Voltage
1.10
−40
0
40 80 120
TEMPERATURE (°C)
Figure 10. RSET Pin Voltage vs. Temperature
1.2
1.0
0.8
0.6
0.4
0.2
0
012 3 4
RSET (kW)
Figure 11. LED Current vs. RSET Resistor
5
Figure 12. PWM 200 Hz, 1% Duty Cycle
100 1.4
10
1
100 Hz
0.1
0.1
1 kHz 5 kHz
1
50 kHz
10
100
DUTY CYCLE (%)
Figure 13. LED Current vs. PWM Duty Cycle
1.2
−40°C
1.0 25°C
0.8 85°C
0.6
0.4
3.0
3.5 4.0 4.5 5.0
INPUT VOLTAGE (V)
Figure 14. EN/PWM Threshold vs. VIN
5.5
http://onsemi.com
5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet CAT4101.PDF ] | |
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