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PDF PR4101 Data sheet ( Hoja de datos )
| Número de pieza | PR4101 | |
| Descripción | High Power LED Buck Driver | |
| Fabricantes | PREMA | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de PR4101 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
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LED DRIVER PR4101
High Power LED Buck Driver PR4101
The PR4101 is a LED buck driver for driving one or several high power LEDs in series.
The supply voltage can be up to 40V, with an output current of more than 1A using an
external N-channel MOSFET switching transistor. The PR4101A with additional PWM and
power down input is delivered SOP14 packaged, while the PR4101B is offered SO8
packaged.
Features
• Adjustable output current of several amps
• Supply voltage up to 40V
• Dimming with phase-cut dimmer
• Brightness control with PWM (PR4101A only)
• Output current temperature compensation
• Delayed start possible (PR4101A only)
• Over temperature protection
• Frequency spreading for improved EMI
• Low standby current of < 35 µA
• Under voltage lockout
Typical Application
Applications
• Halogen lamp or filament
bulb replacement by LEDs
• General illumination
• Warning lights
• Automotive lighting
• Indicator signs
• LCD backlighting
Vcc
7V ... 40V
CIN
Vcc
VDI
Gnd
SUB
5VLo
NDRV
D1 CLED
L
One or
more LEDs
5VHi
Vsense
PR4101
RVsense
Rsense
Pin Configurations
Test
PwrDwn
Delay
1
2
3
PWM
GND
4
5
SUB
5VHi
6
7
14 RTK
13 Temp
12 Vsense
11 NDRV
10 VDI
9 Vcc
8 5VLo
PR4101A: Package SOP14
Topside marking: version code "PR4101"
RTK
GND
5VHi
5VLo
1
2
3
4
8 Vsense
7 NDRV
6 VDI
5 Vcc
PR4101B: Package SOP8
Topside marking: version code "PR4101B"
© PREMA Semiconductor GmbH 2007-2008
Page 1/20
Rev 4808
1 page  
LED DRIVER PR4101
PR4101 data
LED current vs. Supply Voltage for different values of RSENSE and
inductances with one and three LEDs in series, respectively.
CIN=470µF, RVSENSE = 1kΩ, CLED = 100µF, C5VHi/Lo = 220nF, Ta = 25°C (unless otherwise noted)
900
800
700
600
500
400
300
200
100
0
5
900
800
700
600
500
400
300
200
100
0
10
1x3W LED Current vs. Vcc @ L=100µH / 680µH
0.25 Ohm / 100 µH
0.25 Ohm / 680 µH
0.33 Ohm / 100 µH
0.33 Ohm / 680 µH
0.50 Ohm / 100 µH
0.50 Ohm / 680 µH
1.00 Ohm / 100 µH
1.00 Ohm / 680 µH
10 15 20 25 30 35 40 45
Supply Voltage (V)
3x3.5W series LED Current vs. Vcc @ L=100µH / 680µH
0.25 Ohm / 100 µH
0.25 Ohm / 680 µH
0.33 Ohm / 100 µH
0.33 Ohm / 680 µH
0.50 Ohm / 100 µH
0.50 Ohm / 680 µH
1.00 Ohm / 100 µH
1.00 Ohm / 680 µH
15 20 25 30 35 40 45
Supply Voltage (V)
Supply Current vs. Supply Voltage
3,5
3
2,5
2
1,5
1
0,5
0
0 10 20 30 40 50
Supply Voltage (V)
Quiescent Current vs. Supply Voltage
40
35
30
25
20
15
10
5
0
0
10 20 30
Supply Voltage (V)
40
50
© PREMA Semiconductor GmbH 2007-2008
Page 5/20
Rev 4808
5 Page 
LED DRIVER PR4101
Supply from phase-fired SCR dimmer. Different duty cycles on VDI signal.
--- Vcc, --- VDI signal, --- LED current, voltage at a 1Ω resistor
Measured with Vcc=12VAC, CLED=C4=100µF, C5VHi/Lo=220nF, C3=2,2nF, R3=100kOhm, CIN=C1=2000µF,
L= 470 µH, RSENSE=0.25Ω, LED:1x3W Luxeon
Cutting at large phase angles reduces both the average supply voltage Vcc and also the VDI voltage. If it falls
below the forward voltage of the LEDs, or below the undervoltage threshold, the circuit stops working.
The right diagram shows the case at which the supply voltage and therefore also the VDI signal is close to
the VDI threshold.
© PREMA Semiconductor GmbH 2007-2008
Page 11/20
Rev 4808
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet PR4101.PDF ] | |
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