| Part Number | OB2268 Datasheet |
|---|---|
| Manufacturer | LITEON |
| Overview |
OB2268/9 is a highly integrated current mode PWM control IC optimized for high performance, low standby power and cost effective offline flyback converter applications in above 20W power level. PWM sw.
* Extended Burst Mode Control For Improved Efficiency and Minimum Standby Power Design * Audio Noise Free Operation * External Programmable PWM Switching Frequency * Internal Synchronized Slope Compensation * Low VIN/VDD Startup Current(4uA) and Low Operating Current (2.3mA) * Leading Edge Blanking . |
OB2268 Datasheet and Specifications PDF
The OB2268 is a Current Mode PWM Controller.
| Part Number | OB2268 Datasheet |
|---|---|
| Description | Flyback switching power supply applications |
| Manufacturer | On-Bright |
| Overview |
OB2268/OB2269
OB2268/OB2269
-
．:
，， OB2268/OB2269 ，， 。OB2268/OB2269 ，：
▲ ：OB2268/OB2269 ， ( 1/30 ) 。
▲： OB2268/OB2269 ， 。。
▲ ：OB2268/OB2269 VIN/VDD 4uA， ，。
▲ ：OB2268/OB2269 2.3mA，， 。
▲ ：（LEB.
。
2） ： 7 VDD ， 2， 3：
AC IN
EMI R1 Filter
R2
D1
C1 BD1
VDD
OB2268/69
GND
R3 R4
C2
D2
AC IN
EMI Filter
C2 BD1
R1 R2
VDD
OB2268/69
GND
D1 R3 C1
2
3
1.2 ：
RIN VDD C1 ， VDD VTH(ON)（ 16.5V） 。 3 ：
：
⎡ T ⎤D _ ON
V V I R eVTH (ON ) = (
* dc ⋅ DDST IN ) ⎢1 ⎢⎣ * RIN⋅C1 ⎥ ⎥⎦. |