BP9912C Datasheet PDF - BPS


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BP9912C
BPS

Part Number BP9912C
Description Non-isolated Buck Constant Current LED Driver
Page 10 Pages

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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
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BP9912C
晶丰明源半导体 Non-isolated Buck Constant Current LED Driver
Ordering Information
Part Number
BP9912CY
BP9912CZ
BP9912CT
Package
TO-92
TO-92
TO-92
Operating
Temperature
-40 ℃ to 105 ℃
-40 ℃ to 105 ℃
-40 ℃ to 105 ℃
Package Method
Unshaped without tape
1,000pcs/bag
Shaped without tape
1,000pcs/bag
Shaped in tape
2,000 pcs/box
Marking
BP9912C
XXXXXY
XYY
BP9912C
XXXXXY
XYY
BP9912C
XXXXXY
XYY
Pin Configuration and Marking Information
BP9912C
XXXXXY
XYY
XXXXXY: Lot Code
X: Year
YY: Week
Pin Definition
Pin No.
1
Name
VCC
2 CS
3 DRAIN
Figure 2. Pin configuration
Description
Power Supply Pin.
IC GND Pin, also for Current Sense. Connect a sense resistor between
this pin and power GND.
Internal HV Power MOSFET Drain.
BP9912C_EN_DS_Rev.1.2
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BP9912C
晶丰明源半导体 Non-isolated Buck Constant Current LED Driver
Absolute Maximum Ratings (note1)
Symbol
Parameters
Range
Units
DRAIN
IDMAX
VCC
Internal HV MOSFET drain voltage
Maximum Drain Current@ TJ=100
Power Supply voltage
-0.3~500
500
-0.3~8.5
V
mA
V
PDMAX
θJA
TJ
TSTG
Power dissipation (note 2)
Thermal resistance (Junction to Ambient)
Operating junction temperature
Storage temperature range
0.45
140
-40 to 150
-55 to 150
W
/W
ESD (note 3)
2 KV
Note 1: Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. Under “recommended operating
conditions” the device operation is assured, but some particular parameter may not be achieved. The electrical characteristics table defines the operation
range of the device, the electrical characteristics is assured on DC and AC voltage by test program. For the parameters without minimum and maximum
value in the EC table, the typical value defines the operation range, the accuracy is not guaranteed by spec.
Note 2: The maximum power dissipation decrease if temperature rise, it is decided by TJMAX, θJA, and environment temperature (TA). The maximum power
dissipation is the lower one between PDMAX = (TJMAX - TA)/ θJA and the number listed in the maximum table.
Note 3: Human Body mode, 100pF capacitor discharge on 1.5KΩ resistor
Recommended Operation Conditions
Symbol
ILED max
VLED min
Parameter
Maximum Output LED current
Minimum LED Loading Voltage
Range
200
>10
Unit
mA
V
BP9912C_EN_DS_Rev.1.2
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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
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