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BP3126S Datasheet Preview

BP3126S Datasheet

High Precision PSR Constant Current LED Driver

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BP3126S pdf
BP3126S
High Precision PSR Constant Current LED Driver
Description
The BP3126S is a high precision primary-side
feedback and regulation controller for LED lighting, it
operates in constant current control mode and is
designed to work in inductor current discontinuous
conduction mode and extremely suitable for flyback
convertor under universal input, the output power of
system should be less than 24W.
The BP3126S integrates 650V power MOSFET. Since
adopting primary sense and feedback control
technology, the secondary sense and feedback circuit
is eliminated. The loop compensation components are
also removed while maintaining stability overall
operating conditions. The low component counts and
low BOM cost are realized.
Since using the proprietary high accurate current sense
method, the BP3126S realizes ±3% accuracy of LED
current along with excellent line regulation and load
regulation.
The BP3126S offers rich protection functions
including LED short circuit protection, LED open
circuit protection, die over-temperature protection,
VCC over voltage protection, VCC under voltage
protection and FB short circuit protection. All the
protection features are auto-recovery.
Typical Application
Features
Built-in 650V Power MOSFET
Constant current control without secondary sense
and feedback circuit.
±3% LED current accuracy
Ultra low operating current to improve efficiency
High resistance feedback resistor to improve
efficiency
Universal input voltage
LED short and open circuit protection
VCC under-voltage protection
Feedback loop short circuit protection
Current sense resistor open circuit protection
Over temperature protection
No external loop compensation component
required
Available in DIP-8 package
Applications
GU10/E27 LED bulb, spot light
Other LED lighting
NP NS
AC
BP3126S_EN_DS_Rev.1.0
BP3126S
FB
VCC
CS
GND
NC
NC
DRAIN
DRAIN
NAUX
Figure 1. Typical application circuit for BP3126S
www.bpsemi.com
Bright Power Semiconductor Co. Confidential Customer Use Only
1



BPS
BPS

BP3126S Datasheet Preview

BP3126S Datasheet

High Precision PSR Constant Current LED Driver

No Preview Available !

BP3126S pdf
BP3126S
High Precision PSR Constant Current LED Driver
Ordering Information
Part Number
Package
BP3126S
DIP8
Operating
Temperature
-40to 105
Packing Method
Tube
50 Piece/Tube
Marking
BP3126S
XXXXXY
WWXYY
Pin Configuration and Marking Information
GND
FB
VCC
CS
NC
NC
DRAIN
DRAIN
XXXXXY: lot code
WW: Sign
X: Year
YYWeek
Pin Definition
Pin No.
1
Name
GND
2 FB
3 VCC
4 CS
5,6 DRAIN
7,8 NC
Figure 2. Pin configuration
Description
Ground
Feedback. This pin detects the output information from auxiliary
winding.
Power supply
Current sense. This pin connects a current sense resistor to GND to detect
the primary current of transformer.
Internal high voltage MOSFET drain.
No connection, must be floated
BP3126S_EN_DS_Rev.1.0
www.bpsemi.com
Bright Power Semiconductor Co. Confidential Customer Use Only
2


Part Number BP3126S
Description High Precision PSR Constant Current LED Driver
Maker BPS
Total Page 10 Pages
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