Document
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
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Typical Application Circuit
Figure 3 Typical Application Circuit for AC supply
Figure 4 Typical Application Circuit for DC Supply
Brightness Power Semiconductor BP2808_DS_EN_V2.0 Dec 2009
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Pin ASSIGNMENT
Pin Description
PIN No.
1
2
3 4 5 6 7 8
PIN NAMES
GND
LN
VDD OUT NC CS RT DIM
Figure 5 Pin Assignment
DESCRIPTION
Signal and power ground. Connect directly to ground plane. Line voltage compensation of the peak threshold. Sensing the voltage between LN and VDD. Input Supply Pin. Must be locally bypassed. Drain of internal power switch, source of external power switch. No connection Current sense input, sampling resistor connected between CS and GND Fixed turn off time setting Enable switch, analog and PWM dimming input.
ORDERING INFORMATION
ORDERING PART
BP2808ESO8
PACKAGE SOP8
TEMPERATURE RANGE
-40 oC to 85 oC
TRANSPORT MEDIA
Tape and Reel
MARKING BP2808
Brightness Power Semiconductor BP2808_DS_EN_V2.0 Dec 2009
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ABSOLUTE MAXIMUM RATINGS (Note 1)
SYMBOL VDD LN OUT CS DIM
RT IOUT PDMAX PTR TJ TSTG
ITEMS Supply Voltage Lin.