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BP2808 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 BP2808
기능 LED Constant Current Driver
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BP2808 데이터시트, 핀배열, 회로
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 ±3accuracy 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




BP2808 pdf, 반도체, 판매, 대치품
ABSOLUTE MAXIMUM RATINGS (Note 1)
SYMBOL
VDD
LN
OUT
CS
DIM
RT
IOUT
PDMAX
PTR
TJ
TSTG
ITEMS
Supply Voltage
Line voltage compensation
Drain of internal power switch.
Pin of current sense
Enable switch, analog and PWM dimming
input.
Fixed turn off time setting
Output current of power switch
Power Dissipation (Note 2)
Thermal Resistance SOP8(θJA
Operation Junction Temperature Range
Storage Temperature
ESD Susceptibility (Note 3)
VALUE
-0.3~18
-0.3~18
-0.3~20
-0.3~6
-0.3~6
-0.3~6
0.8
0.5
150
-40 to 150
-55 to 150
3
UNIT
V
V
V
V
V
V
A
W
oC /W
oC
oC
kV
Note 1: Absolute Maximum Ratings indicate that operating beyond these ratings may damage the device.
Recommended Operating Range indicates that the device is functional in that range, but do not guarantee specific
performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test
conditions which guarantee specific performance limits. This assumes that the device is within the Operating Range.
Specifications are not guaranteed for parameters where no limit is given, however, the typical value is a good
indication of device performance.
Note 2: The maximum power dissipation must be decreasing with elevating temperatures and is dictated by TJMAX,
θJA, and the ambient temperature TA. The maximum allowable power dissipation is PDMAX = (TJMAX - TA)/ θJA or the
lower number given in Absolute Maximum Ratings.
Note 3: Human body model, 100pF capacitor discharged through a 1.5kresistor.
RECOMMENDED OPERATING RANGE
SYMBOL
VDD
TOPT
ITEMS
VDD Supply Voltage
Operating Temperature
VALUE
0 ~ 16
-40 to +85
UNIT
V
oC
Brightness Power Semiconductor
BP2808_DS_EN_V2.0 Dec 2009
Page 4

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BP2808 전자부품, 판매, 대치품
Typical Application Circuit:
Following is the BP2808 application circuit diagram as an 18W (24 series LEDs with 12 parallel connections)
LEDs driver, which is designed for application in China.
Schematic
Power SPEC.
Input Voltage Range:
Input Frequency
LED Voltage
LED Current
System Efficiency
Power Factor
IL Ripple Factor
Figure 6 Schematic
Vin=176V-265V
Fin=50Hz
Vled=3.2V
Iled=20mA
η=90%
PF=0.9
ΔIL= 65%
Parameters Calculation:
Output Voltage
Output Current
Output Power
Inductor Peak Current
Inductor Ripple Current
Turn Off Time
Vout=24s*3.2V=76.8V
Iout=12p*20mA=240mA
Pout=76.8*240=18.4W
ILpk=240+(240*65%)=396mA
ILrp=2*(396-240)=312mA
Toff=10.8uS
Brightness Power Semiconductor
BP2808_DS_EN_V2.0 Dec 2009
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