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BP9912C PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 BP9912C
기능 Non-isolated Buck Constant Current LED Driver
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BP9912C 데이터시트, 핀배열, 회로
BP9912C
晶丰明源半导体 Non-isolated Buck Constant Current LED Driver
Description
BP9912C 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 BP9912C integrates a 500V power MOSFET.
With patent pending MOSFET driving technique, the
operating current of the IC is as low as 180uA. It
doesn’t need the auxiliary winding for VCC supply.
It can achieve excellent constant current performance
with very few external components, so the system
cost and size are minimized.
BP9912C 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 output voltage.
The BP9912C offers rich protections to improve the
system reliability, including LED short circuit
protection, VCC under voltage protection and
thermal regulation function.
Features
Internal 500V Power MOSFET
Integrated HV JFET for VCC Power Supply
Critical Conduction Mode Operation
Low Operating Current
±5% LED Output Current Accuracy
LED Short Protection
VCC Under Voltage Protection
Thermal Regulation Function
Available in TO-92 Package
Applications
LED Candle Light
LED Bulb
Other LED Lighting
Typical Application
AC
DRAIN 3
CS 2
VCC 1
BP9912C
BP9912C_EN_DS_Rev.1.2
Figure 1. Typical application circuit for BP9912C
www.bpsemi.com
BPS Confidential Customer Use Only
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BP9912C pdf, 반도체, 판매, 대치품
BP9912C
晶丰明源半导体 Non-isolated Buck Constant Current LED Driver
Electrical Characteristics (Notes 4, 5) (Unless otherwise specified, VCC=7V and TA =25 )
Symbol
Parameter
Conditions
Min Typ Max Units
Supply Voltage Section
VCC VCC Operating Voltage Drain=100V
7.3 V
VCC_ON
VCC Turn On Threshold
VCC Rising
6.6 V
VCC_UVLO VCC Turn off Threshold
VCC Falling
5.7 V
IST
VCC Startup Current
VCC= VCC-ON - 1V
0.65 1.2 mA
IOP VCC Operating Current
110 180 uA
Current Sense Section
VCS_TH
Threshold Voltage for
Peak Current Limit
582 600 618 mV
Leading Edge Blanking
TLEB Time for Current Sense
500 ns
TDELAY
Switch Off Delay Time
200 ns
Internal Time Control Section
TOFF_MIN
Minimum OFF Time
2.5 us
TOFF_MAX
Maximum OFF Time
300 us
TON_MAX
Maximum On Time
50 us
MOSFET Section
RDS_ON
Static Drain-source
On-resistance
VGS=7V/IDS=0.1A
12
Ω
BVDSS
Drain-Source
Breakdown Voltage
VGS=0V/IDS=250uA 500
V
Thermal Regulation Section
TREG
Thermal Regulation
Temperature
140
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
BP9912C_EN_DS_Rev.1.2
www.bpsemi.com
BPS Confidential Customer Use Only
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BP9912C 전자부품, 판매, 대치품
BP9912C
晶丰明源半导体 Non-isolated Buck Constant Current LED Driver
The CS resistor should be as close as possible to the
CS pin, and makes the connection to the VCC bypass
capacitor as short as possible.
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
the bus capacitor loop.
CS Pin
To increase the copper area of CS pin for better
thermal dissipation.
BP9912C_EN_DS_Rev.1.2
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BPS Confidential Customer Use Only
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BP9912C

Non-isolated Buck Constant Current LED Driver

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