driver controller. BP3105 Datasheet
BP3105 is a high precision primary side regulation
(PSR) controller designed for high brightness LED
driver. It’s extremely suitable to be used in flyback
converter operating in worldwide voltage range.
BP3105 works in discontinuous inductive current
mode. The patented control method dramatically saves
the system cost and size by eliminating all secondary
feedback circuitry and loop control compensation
circuitry. This control method also achieves excellent
line and load regulation.
BP3105 integrates high precision current sense
circuitry, which achieves ±3% LED current accuracy.
BP3105 offers rich protection features including LED
short/open circuit protection, over-temperature
protection, under-voltage lockout, VCC over voltage
BP3105 is assembled in tiny SOT23-5 package.
PSR constant current (CC) control，no secondary
feedback circuit required
±3% LED current accuracy
Tiny SOT23-5 packagez
Ultra low operating current to improve efficiency
Low power consumption on FB resistor network
World wide voltage range
LED short/open circuit protection
VCC over voltage protection
Current sense resistor open circuit protection
Over temperature protection
No external loop compensation required
GU10/E27 LED bulb, spot light
LED PAR30/PAR38, down light
LED tube light
Other LED lighting
Figure 1 typical application circuit
Signal and Power ground
The output gate driver for an external N-channel power MOSFET.
The current sense pin used to sense the MOSFET current by means of an
external sense resistor. The resistor is connected between CS and GND
The voltage feedback from auxiliary winding.
Note1：X is stand for A,B,C,D
-40 oC to 85 oC
Tape and Reel