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PDF BP2808 Data sheet ( Hoja de datos )
| Número de pieza | BP2808 | |
| Descripción | LED Constant Current Driver | |
| Fabricantes | BPS | |
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General Description
The BP2808 is a current mode control LED driver IC.
The BP2808 can support DC voltage which ranges
from 12V to 600V, with duty cycle up to 100%. The
BP2808 can be used in non-isolation LEDs driving
system and can support AC supply voltage from 85V to
265V. The BP2808 uses patented technique for source
driver and constant current compensation, so LEDs
current has ±3％ accuracy with AC supply voltage
variation from 85V to 265V. What’s more, the patented
technique for the driving scheme ensures 90% higher
efficiency in the application of 18W LEDs lighting with
AC voltage range from 85V to 265V. In AC voltage
range from 85V to 265V, the BP2808 can drive
3W-36W LEDs array which is widely used in
E14/E27/PAR30/PAR38/GU10 lighting and tube LEDs
lighting.
The BP2808 has multiple LED protections, including
LED open-circuit protection, LED short-circuit
protection and thermal shutdown protection. If system
has a failure, the BP2808 will operate in protection
mode until system recovers.
The BP2808 is available in SOP8 packages.
Application
LED Tube lighting
E14/PAR30/PAR38/GU10/E27 LED spotlight
LED Street lighting
LED Signal lighting
LED down-light
Features
Source driver structure
Constant current compensation
System DC supply voltage: 12V to 600V.
System AC supply voltage: 85V to 265V.
Duty Cycle up to 100%.
Typical ±5% output current accuracy.
Up to 95% system efficiency.
LED open-circuit protection; LED short-circuit
protection.
Internal thermal shutdown protection.
Single DIM pin for dynamic temperature
compensation and brightness control using DC
voltage or PWM signal
Typical Application
93%
92%
91%
90%
89%
88%
85 105 125 145 165 185 205 225 245 265
251
250
249
248
247
246
85 105 125 145 165 185 205 225 245 265
Figure 1 Efficiency vs. Line Voltage
Figure 2 Output Current vs. Line Voltage
Brightness Power Semiconductor
BP2808_DS_EN_V2.0 Dec 2009
Page 1
1 page  
ELECTRICAL CHARACTERISTICS (Note 4, 5)
(The following specifications apply for VIN=12V, TA=25 oC, unless specified otherwise.)
SYMBOL
VDD
VUVLO
IST
VUVLO, HYS
Current Sense
VCS-TH
TLEB
TDELAY
ΔVCS-TH @ ΔVLN
Fixed Toff control
TOFF
VRT
Operating Current
IOFF
IOP
DIM Input
VDIM
VDIM_H
VDIM_L
VDIM_DC
RDIM
IDIM_L
Output Switch
RSW
ISWmean
ILEAK
Thermal Shutdown
TSD
ITEMS
Input Voltage
Under voltage lock out
Start up current
UVLO hysteresis
CONDITIONS
VDD rising
VDD=8V before
startup
Current sense threshold voltage
Current sense blank interval
Delay to output
ΔVLN =VLN -VDD
ΔVLN = 0
VCS=VCS-TH+50mV
VCS=VCS-TH+50mV
ΔVLN = 1V
Fixed turn off interval
RT voltage
RT=270K
Quiescent supply current with
output off
VDIM<0.4V
Operating supply current
fOP=50kHz
Internal supply voltage
DIM input voltage High
DIM input voltage Low
DC brightness control
DIM pull up resistor to Internal
supply voltage
DIM input leakage low
DIM floating
VDIM = 0
SW On Resistance
Continuous SW Current
SW Leakage Current
VDD = 12V
Thermal Shutdown Threshold
Min.
11
240
9.7
1.1
2.5
0.5
Typ.
8.5
30
2.5
250
500
650
-30
10.8
1.25
90
200
5
100
50
0.8
0.5
150
Max. UNIT
16 V
10 V
100 µA
V
260 mV
ns
ns
mV
12 µs
1.4 V
µA
µA
V
V
0.3 V
2.5 V
kΩ
µA
Ω
700 mA
5 µA
℃
Brightness Power Semiconductor
BP2808_DS_EN_V2.0 Dec 2009
Page 5
5 Page 
9、 DIM pin
DIM pin can be used as DC voltage and PWM dimming input. Float this pin, if it is not used.
As for analog dimming, only a 150K potentiometer can achieve 0% to 100% dimming range. As for
PWM dimming, the recommended frequency is 270Hz.
Brightness Power Semiconductor
BP2808_DS_EN_V2.0 Dec 2009
Page 11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet BP2808.PDF ] | |
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