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PDF PAM2810 Data sheet ( Hoja de datos )
| Número de pieza | PAM2810 | |
| Descripción | 4-Channel Programmable LED Current Sink | |
| Fabricantes | Power Analog Micoelectronics | |
| Logotipo |  |
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PAM2810
4-Channel Programmable LED Current Sink
Features
n Cost Effective LED Driver
n Support up to 4 White LEDs
n Output Current up to 40mA per LED
n Low Dropout Voltage
n Ultra Low Quiescent Supply Current:
65μA (typ)
n No Noise and EMI
n Shutdown Current Less than 1μA
n Over Temperature Protection
n Small Packages : SOT23-8 and DFN
2mmx2mm
n Pb-free Package
Applications
n White LED for LCD Display Backlights
n White LED Keypad Backlights
n 1-Cell Li-Ion Battery-operated Equipment
Including PDAs, Hand-held PCs, Cellular
Phone
Description
The PAM2810 provides 4 regulated current sinks,
capable of sinking up to 40mA current to
accommodate 4 white LEDs. It requires no charge
pump, has no noise and EMI, and significantly
improves the efficiency in Li bettery range.
LED brightness can be controlled by PWM
techniques. The constant current sink is set with
an external sense resistor.
Alternatively, a PWM signal applied to the EN pin
can vary the anticipated brightness of the LED.
The device is in shut down mode when the EN
input is logic low.
The PAM2810 is available in SOT23-8 and DFN
2mmX2mm Packages.
Typical Application Circuit
VIN
www.DataSheet4U.com
C1
0.1μF
4
VIN
2 LED1 8
EN
LED2 7
PAM2810
1 LED3 6
ISET
LED4 5
GND
R1 3
6.2k
Power Analog Microelectronics,Inc
www.poweranalog.com
1
08/2008 Rev 1.1
1 page  
PAM2810
4-Channel Programmable LED Current Sink
Typical Performance Characteristics
TA=25°C, V =IN 3.6V, RS =ET 5.1kΩ, V =LEDX 0.5V, unless otherwise noted.
45
40
35
30
25
20
15
10
5
0
0
LED Current VS LED Pin Voltage
R=12.7KΩ
R=4.3KΩ
0.3 0.6 0.9
LED Pin Voltage(V)
R=6.2KΩ
R=3.2KΩ
1.2 1.5
45
40
35
30
25
20
15
10
5
0
3
LED Curent VS Input Voltage
R=12.7KΩ
R=4.3KΩ
R=6.2KΩ
R=3.2KΩ
3.5 4 4.5
Input Voltage(V)
5
5.5
1.2135
VIset VS Input Voltage
1.2125
1.2115
1.2105
1.2095
1.2085
www.Da1t.a2S0h7e5et4U.com
3 3.5
4 4.5
Input Voltage(V)
5
5.5
50
45
40
35
30
25
20
15
10
5
0
0
LED Current VS Rset
5 10 15
Rset(kΩ)
20
Efficiency VS Input Voltage
100
90
80
70
60
50
40
30
20
10
0
3
Rset=6.2k
3.25
3.5
3.75
4
Input Voltage(V)
4.25
4.5
30
25
20
15
10
5
0
0
LED Current vs PWM Duty Cycle
20 40 60 80
PWM Duty Cycle (%)
100
Power Analog Microelectronics,Inc
www.poweranalog.com
5
07/2008 Rev 1.1
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet PAM2810.PDF ] | |
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