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BP2833D PDF 데이터시트 ( Data , Function )

부품번호 BP2833D 기능
기능 Non-isolated Buck Offline LED Driver
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BP2833D 데이터시트, 핀배열, 회로
晶丰明源半导体
BP2833D
Non-isolated Buck Offline LED Driver
Description
The BP2833D is a high precision buck constant
current LED driver. The device operates in critical
conduction mode and is suitable for 85Vac~265Vac
universal input offline LED lighting.
The BP2833D integrates a 500V power MOSFET.
With patent pending MOSFET driving technique, the
operating current of the IC is very low. So it doesn’t
need the auxiliary winding for supplying the chip. It
can achieve excellent constant current performance
with very few external components, so the system
cost and size are minimized.
The BP2833D utilizes patent pending current control
method. It can achieve precise output current and
excellent line regulation. The driver operates in
critical conduction mode, the output current does not
change with the inductance and LED output voltage.
The BP2833D offers rich protection functions to
improve the system reliability, including LED open
circuit protection, LED short circuit protection, VCC
under voltage protection, CS resistor short circuit
protection and thermal regulation function.
Features
Critical Conduction Mode Operation
Internal 500V Power MOSFET
No Auxiliary Winding
Ultra Low Operating Current
±5% LED Output Current Accuracy
LED Open Protection
LED Short Protection
Current Sensing Resistor Short Protection
VCC Under Voltage Protection
Thermal Regulation Function
Available in DIP-8 Package
Applications
LED Tube
LED Ceiling Light
LED Bulb
Other LED Lighting
Typical Application
AC BP2833D
4 VCC DRAIN 5
2 ROVP DRAIN 6
3 NC
CS 7
1 GND
CS 8
BP2833D_EN _DS_Rev.1.0
Figure 1. Typical application circuit for BP2833D
www.bpsemi.com
BPS Confidential Customer Use Only
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BP2833D pdf, 반도체, 판매, 대치품
晶丰明源半导体
BP2833D
Non-isolated Buck Offline LED Driver
Electrical Characteristics (Notes 4, 5) (Unless otherwise specified, VCC=15V and TA =25 )
Symbol
Parameter
Conditions
Min Typ Max Units
Supply Voltage Section
VCC_CLAMP
VCC Clamp Voltage
VCC_ON
VCC Turn On Threshold
VCC_UVLO
VCC Turn off Threshold
IST VCC Startup Current
IOP VCC Operating Current
Current Sense Section
1mA
VCC Rising
VCC Falling
VCC= VCC-ON - 1V
FOP=70KHz
16.8 V
13.8 V
9V
120 180 uA
100 150 uA
VCS_TH
Threshold Voltage for
Peak Current Limit
388 400 412 mV
VCS_SHORT
Threshold Voltage for
Peak Current Limit When
Output Short
Output Short
200 mV
Leading Edge Blanking
TLEB
Time for Current Sense
350 ns
TDELAY
Switch Off Delay Time
Internal Time Control Section
200 ns
TOFF_MIN
TOFF_MAX
TON_MAX
VROVP
Minimum OFF Time
Maximum OFF Time
Maximum On Time
ROVP Pin Voltage
3 us
240 us
40 us
0.5 V
MOSFET Section
RDS_ON
Static Drain-source
On-resistance
VGS=15V/IDS=0.4A
5
Ω
BVDSS
Drain-Source Breakdown
Voltage
VGS=0V/IDS=250uA 500
V
Power MOSFET Drain
IDSS
Leakage Current
VGS=0V/VDS=500V
1 uA
Thermal Regulation Section
TREG
Thermal Regulation
Temperature
150
Note 4: production testing of the chip is performed at 25°C.
Note 5: the maximum and minimum parameters specified are guaranteed by test, the typical value are guaranteed by design, characterization and statistical
analysis
BP2833D_EN _DS_Rev.1.0
www.bpsemi.com
BPS Confidential Customer Use Only
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BP2833D 전자부품, 판매, 대치품
晶丰明源半导体
BP2833D
Non-isolated Buck Offline LED Driver
off threshold is reduced to 200mV. So the system
power consumption is very low. At some
catastrophic fault condition, such as CS resistor
shorted or inductor saturated, the internal fast fault
detection circuit will be triggered, the system stops
switching immediately.
After the system enters into fault condition, the VCC
voltage will decrease until it reaches the UVLO
threshold, then the system will re-start again. If the
fault condition is removed, the system will recover to
normal operation.
the bus capacitor loop.
NC pin
The NC pin should be connected to GND (pin1).
Drain Pin
To increase the copper area of DRAIN pin for better
thermal dissipation. However too large copper area
may compromise EMI performance.
Thermal Regulation
The BP2833D integrates thermal regulation function.
When the system is over temperature, the output
current is gradually reduced; the output power and
thermal dissipation are also reduced. The system
temperature is regulated and the system reliability is
improved. The thermal regulation temperature is set
to 150internally.
PCB Layout
The following rules should be followed in BP2833D
PCB layout:
Bypass Capacitor
The bypass capacitor on VCC pin should be as close
as possible to the VCC Pin and GND pin.
ROVP Pin
The ROVP resistor should be as close as possible to
the ROVP Pin.
Ground Path
The power ground path for current sense should be
short, and the power ground path should be separated
from small signal ground path before connecting to
the negative node of the bulk capacitor.
The Area of Power Loop
The area of main current loop should be as small as
possible to reduce EMI radiation, such as the
inductor, the power MOSFET, the output diode and
BP2833D_EN _DS_Rev.1.0
www.bpsemi.com
BPS Confidential Customer Use Only
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