operating current of the IC is as low as 200uA. 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.
BP9916D 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 BP9916D offers rich protections to improve the
system reliability, including LED short circuit
protection, VCC under voltage protection and
thermal regulation function.
Non-isolated Buck Offline LED Driver
Features
Internal 500V Power MOSFET
Integrated HV JFET for VCC Power Supply
Critical Conduction Mode Operation
Low Operating Current
± LED Output Current Accuracy
5%
LED Short Protection
VCC Under Voltage Protection
Thermal Regulation Function
Available in
SOP8
Package
Applications
LED Candle Light
LED Bulb
Other LED Lighting
Typical Application
AC
6
BP9916D
5
CS
CS
DRAIN
NC
NC
VCC
4
3
2
1
7
CS
8
CS
Figure 1. Typical application circuit for BP9916D
BP9916D_EN _DS_Rev.1.0
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BP9916D
晶丰明源半导½
Ordering Information
Part Number
BP9916D
Package
SOP8
Operating
Temperature
-40 ℃ to 105 ℃
4,000 Pcs/Roll
Packing Method
Tape
Marking
BP9916D
XXXXXY
XYY
Non-isolated Buck Offline LED Driver
Pin Configuration and Marking Information
VCC
CS
NC
NC
DRAIN
CS
CS
CS
XXXXXY: Lot Code
X: Year
YY: Week
BP9916D
Figure 2. Pin configuration
XXXXXY
XYY
Pin Definition
Pin No.
1
5,6,7,8
4
Name
VCC
CS
DRAIN
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.
Description
BP9916D_EN _DS_Rev.1.0
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BP9916D
晶丰明源半导½
Absolute Maximum Ratings
(note1)
Symbol
DRAIN
I
DMAX
VCC
P
DMAX
θ
JA
T
J
T
STG
Parameters
Internal HV MOSFET drain voltage
Maximum Drain Current@ T
J
=100℃
Power Supply voltage
Power dissipation (note 2)
Thermal resistance (Junction to Ambient)
Operating junction temperature
Storage temperature range
ESD (note 3)
Range
-0.3~500
700
-0.3~8.5
0.45
145
-40 to 150
-55 to 150
2
Units
V
mA
V
W
℃/W
℃
℃
KV
Non-isolated Buck Offline LED Driver
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 T
JMAX
, θ
JA
, and environment temperature (T
A
). The maximum power
dissipation is the lower one between P
DMAX
= (T
JMAX
- T
A
)/ θ
JA
and the number listed in the maximum table.
Note 3:
Human Body mode, 100pF capacitor discharge on 1.5KΩ resistor
Recommended Operation Conditions
Symbol
I
LED max
V
LED min
Parameter
Maximum Output LED current
Minimum LED Loading Voltage
Range
275
>10
Unit
mA
V
BP9916D_EN _DS_Rev.1.0
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BP9916D
晶丰明源半导½
Non-isolated Buck Offline LED Driver
Electrical Characteristics (Notes 4, 5)
(Unless otherwise specified, V
CC
=7V and T
A
=25
℃)
Symbol
V
CC
V
CC_ON
V
CC_UVLO
I
ST
I
OP
Parameter
V
CC
Operating Voltage
V
CC
Turn On Threshold
V
CC
Turn off Threshold
V
CC
Startup Current
V
CC
Operating Current
Threshold Voltage for
Peak Current Limit
Leading Edge Blanking
Time for Current Sense
Switch Off Delay Time
Minimum OFF Time
Maximum OFF Time
Maximum On Time
Static Drain-source
On-resistance
Drain-Source
Breakdown Voltage
Thermal Regulation
Temperature
Conditions
Drain=100V
V
CC
Rising
V
CC
Falling
V
CC
= V
CC-ON
- 1V
Min
Typ
7.3
6.6
5.7
0.8
140
1.2
200
Max
Units
V
V
V
mA
uA
Supply Voltage Section
Current Sense Section
V
CS_TH
T
LEB
T
DELAY
T
OFF_MIN
T
OFF_MAX
T
ON_MAX
MOSFET Section
R
DS_ON
BV
DSS
V
GS
=7V/I
DS
=0.1A
V
GS
=0V/I
DS
=250uA
500
8.3
Ω
V
580
600
500
200
2.5
300
40
620
mV
ns
ns
us
us
us
Internal Time Control Section
Thermal Regulation Section
T
REG
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
BP9916D_EN _DS_Rev.1.0
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BP9916D
晶丰明源半导½
Internal Block Diagram
DRAIN
VCC
VCC Supply
Non-isolated Buck Offline LED Driver
VCC UVLO &
Power on Reset
Thermal
Regulation
CC &
logic
Control
ZCD
LEB
+
Current
Sense
S/H
-
0.6V
CS
Figure 3. BP9916D Internal Block Diagram
Application Information
The BP9916D is a high performance non-isolated
Buck converter specially designed for LED lighting.
The device integrates a 500V power MOSFET. With
very few external components, the converter
achieves excellent constant current control. And it
does not need auxiliary winding for powering the IC
or voltage sensing, hence the system size and cost is
greatly reduced.
Start Up
After system powered up, the VCC pin capacitor is
charged up by internal HV JEFT. When the VCC pin
voltage reaches the turn on threshold, the internal
circuits start operating. The HV JEFT will still
BP9916D_EN _DS_Rev.1.0
supply operating current when the IC is working and
keep the VCC voltage at 7.3V.
Constant Current Control
Cycle by Cycle current sense is adopted in BP9916D,
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