BW7383

BW7383
6 Pin Non-isolation Buck current control IC with High PFC for LED Lighting
Description
BW7383 is a non-isolation Buck type control IC with
active power factor correction function for LED lighting
application.
The IC achieves high power factor and high efficiency by
BCM mode. The line and load regulation of LED current
is about ±2.5% because of particular control method.
Pin Configurations (Top View)
BW7383 also provides gate driving voltage clamping,
VCC over voltage protection and system output
open/short circuit protection to increase IC performance.
Features
• Universal Input Voltage Range from 90VAC to
264VAC
• Transition-mode PFC operating
• Built-in Active Power Factor Correction Technique
Applications
• Constant Output Current Control LED driver
• LED lighting
• Good Line and Load Regulation
• Down light
• Open-LED Protection on DMG and VCC pin
• Tube lamp
• Over-Voltage Protection on VCC pin
• PAR lamp
• Short-LED Protection
• Bulb
• Cycle by Cycle Over current Protection on CS pin
• Over-Temperature Protection
• Gate Driving Voltage Clamping
• SOT26 Package Available
• RoHS compliant package
Packing & Order Information
3,000/Reel
PIN DESCRIPTIONS
Pin Name
Pin Description
VCC
Power supply pin for all internal circuit
GND
Ground return for all internal circuit
OUT
Gate driver output
RT
Efficiency / THD option pin
COM
Output pin of error amplifier
CS
Input current sense pin
Publication Order Number: [BW7383]
© Bruckewell Technology Corporation Rev. A -2014
BW7383
6 Pin Non-isolation Buck current control IC with High PFC for LED Lighting
TYPICAL APPLICATION CIRCUITS
ABSOLUTE MAXIMUM RATINGS (Note 1)
Parameter
Symbol
Range
Unit
Power supply pin
VCC
40
V
DMG voltage to GND
VDMG
-0.3 to 40
V
CS voltage to GND
VCS
-0.3 to 5.5
V
OUT voltage to GND
VOUT
-0.3 to 40
V
COM voltage to GND
VCOM
-0.3 to 5.5
V
TJ
-40 to +150
°C
Storage temperature rang
TSTG
-65 to +150
°C
Lead temperature (Soldering 10 sec)
TLEAD
260
°C
Power dissipation @TA=25°C
PD
0.3
W
Thermal resistance junction to ambient (Note 2)
θJA
220
°C/W
Thermal Resistance
θJC
106.6
°C/W
VESD
2
kV
Maximum junction temperature
ESD rating, Human body mode (Note 3)
Publication Order Number: [BW7383]
© Bruckewell Technology Corporation Rev. A -2014
BW7383
6 Pin Non-isolation Buck current control IC with High PFC for LED Lighting
RECOMMENDED OPERATING CONDITIONS (Note 4)
Parameter
Symbol
Operation Conditions
Unit
Power supply pin
VCC
34.5
V
DMG voltage to GND
VDMG
-0.3 to 11.2
V
CS voltage to GND
VCS
-0.3 to 5
V
OUT voltage to GND
VOUT
-0.3 to 19
V
COM voltage to GND
VCOM
-0.3 to 5
V
Operating Junction Temperature Range
TJ
-40 to +125
°C
Operating Ambient Temperature Range
TOPA
-40 to +85
°C
Note 1: Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the
device. These are for stress ratings. Functional operation of the device at these or any other conditions
beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may remain possibility to affect device reliability.
Note 2: Thermal Resistance is specified with the component mounted on a low effective thermal
conductivity test board in free air at TA=25°C.
Note 3: Devices are ESD sensitive. Handing precaution recommended.
Note 4: The device is not guaranteed to function outside its operating conditions.
BLOCK DIAGRAM
Publication Order Number: [BW7383]
© Bruckewell Technology Corporation Rev. A -2014
BW7383
6 Pin Non-isolation Buck current control IC with High PFC for LED Lighting
ELECTRICAL CHARACTERISTICS VCC=15V, TA= 25°C, unless otherwise specified.
Parameter
Symbol
Conditions
Min
Typ.
Max.
Units
Turn-on voltage
VCC_ON
17.4
18.4
19.4
V
Turn-off voltage
VCC_OFF
9.3
9.8
10.3
V
Quiescent current 1
IQ1
Vcc=17V, at Vcc_off
30
50
uA
Quiescent current 2
IQ2
Start up at 4.5 KHz
600
800
uA
Operation supply current
ICC
2.5
3.0
mA
Min
Typ.
Max.
Units
PROTECTION
Parameter
Symbol
VCC voltage protection
VOVPA
31.2
32.8
34.5
V
Output voltage protection
VOVPS
9.8
10.5
11.2
V
CS limit voltage
VOCP
1.15
1.25
13.35
V
Short circuit protection(Note 5)
VO_STR
Conditions
V
GM AMPLIFIER
Parameter
Symbol
Reference voltage
VREF
Transconductance
GM
108
uA/V
Source current
ICOMP_SOU
20
uA
OSCILLATOR
Parameter
Symbol
Start Frequency
TSTR
DRIVER
Parameter
Conditions
Conditions
Min
Typ.
Max.
Units
195
200
205
mV
Min
Typ.
Max.
220
Conditions
VOH
Min
us
Typ.
Max.
Units
VCC=33V, IO = 10mA
1.2
1.5
V
VOL
VCC=33V, IO = -10mA
0.12
V
Rising time
TRISE
VCC=20V, CO =1nF
40
ns
Falling time
TFAIL
VCC=20V, CO =1nF
80
ns
Output clamp voltage
VO_CLAMP
Leading edge blanking time
LEBT
OTP(Note 6)
Parameter
Symbol
Dropout voltage
Symbol
Units
19
0.5
Conditions
Min
Typ.
V
ns
Max.
Units
OTP Trip Point
150
°C
OTP Release Point
115
°C
OTP Threshold Hysteresis
35
°C
Publication Order Number: [BW7383]
© Bruckewell Technology Corporation Rev. A -2014
BW7383
6 Pin Non-isolation Buck current control IC with High PFC for LED Lighting
APPLICATION INFORMATION
2-6. DMG
1. Function Description
The DMG pin can sense output information to depart from start
The BW7383 is a constant current Buck controller with PFC
up voltage(VO_STR) and protection voltage(VOVPS). Besides,
function for LED lighting applications.
the Internal resistance of DMG pin is 1.6Mohm.
The controller is BCM operation with constant on time based
When DMG sense voltage under VO_STR, the circuit will work
regulator design to achieve high power factor performance.
on short circuit protection,and the system switching frequency
The BW7383 is built-in functions of VCC over voltage protection,
FSTR=1/Tstr.
open LED protection, short LED protection, over temperature
When DMG sense voltage over VOVPS, the circuit will work on
protection, primary side current limit, and gate clamp within.
over voltage protection, it will latch out off until VCC under
The BW7383 sense output current from CS pin to get the output
VCC_OFF.
current information. By the system close loop feedback. The
avarge output current can express as below.
IOUT = 0.2 / Rs
2. Pin Detail
2-1. COM
This is the output of the Gm amplifier. Connect with a suitable
RC network to ground.
2-2. GND
GND is the reference node of internal circuit.
2-3. CS
MOSFET current signal sensing for LED constant current
control and current limit setting function
2-4. OUT
Gate drive for external MOSFET switch and is built-in Gate
clamp function.
2-5. VCC
Power supply for the controller during normal operation. The
controller will start up when VCC reaches 18.4V (typical) and will
shut-down when VCC voltage is below 9.8V (typical). A
decoupling capacitor should be connected between the VCC
and GND pin as close as possible.
The BW7383 perform VCC over voltage protection though VCC
pin. Once VCC pin exceed in 32.8V, BW7383 turns off and latch
out the MOSFET switcher until VCC under VCC_OFF.
Publication Order Number: [BW7383]
© Bruckewell Technology Corporation Rev. A -2014
BW7383
6 Pin Non-isolation Buck current control IC with High PFC for LED Lighting
Disclaimer
ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT
NOTICE TO IMPROVE RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.
Bruckewell Technology Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf
(collectively, “Bruckewell”), disclaim any and all liability for any errors, inaccuracies or incompleteness
contained in any datasheet or in any other disclosure relating to any product.
Bruckewell makes no warranty, representation or guarantee regarding the suitability of the products for any
particular purpose or the continuing production of any product. To the maximum extent permitted by applicable
law, Bruckewell disclaims
(i) Any and all liability arising out of the application or use of any product.
(ii) Any and all liability, including without limitation special, consequential or incidental damages.
(iii) Any and all implied warranties, including warranties of fitness for particular purpose, non-infringement
and merchantability.
Statements regarding the suitability of products for certain types of applications are based on Bruckewell’s
knowledge of typical requirements that are often placed on Bruckewell products in generic applications.
Such statements are not binding statements about the suitability of products for a particular application. It is the
customer’s responsibility to validate that a particular product with the properties described in the product
specification is suitable for use in a particular application. Parameters provided in datasheets and/or
specifications may vary in different applications and performance may vary over time.
Product specifications do not expand or otherwise modify Bruckewell’s terms and conditions of purchase,
including but not limited to the warranty expressed therei
Publication Order Number: [BW7383]
© Bruckewell Technology Corporation Rev. A -2014
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