| Description | OB2268/OB2269 OB2268/OB2269 - ．: ，， OB2268/OB2269 ，， 。OB2268/OB2269 ，： ▲ ：OB2268/OB2269 ， ( 1/30 ) 。 ▲： OB2268/OB2269 ， 。。 ▲ ：OB2268/OB2269 VIN/VDD 4uA， ，。 ▲ ：OB2268/OB2269 2.3mA，， 。 ▲ ：（LEB）， R-C ， 。 ▲ OCP ：OB2268/OB2269 OCP ， OCP ，。 ▲ ：OB2268/OB2269 。OVP，UVLO， OCP， OPP OTP ， 。 ▲ MOSF... |
| Features |
。
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 ⎥ ⎥⎦
(1)
IDDST ： OB2268/69
TD_ON：
RIN：
R1 R2
，RIN ， 1.5MΩ~3MΩ 。
， 4。
AC IN
EMI Filter
C2 BD1
R1 R2
4 ， C1
()，RIN ( OCP ， 1.4 OCP
)，
VIN
VDD
OB2268/69
GND
D1 C1 C3
R3
。 4 ，
16V/3.5A ， R1=R2=910KΩ，R3=0Ω，
C1=2.2uF，C2=120uF，C3=4.7uF， 90Vac/60Hz
， 750mS 。
4
1.3 RIN ：
3 ，...
|
| Datasheet |
 OB2268 Datasheet - 310.06KB |
| Part Number | Description |
|---|---|
 On-Bright Electronics |
High Performance Quasi-Resonant PWM Controller OB2201 is a high performance flyback QuasiResonant (QR) controller optimized to achieve high efficiency in the universal input range and full loading range with effective system cost. At full loading, the IC operates in fix frequency (52KHz) CCM mode in the low line input range and operates in QR mode in high line input range. In this way, high efficiency in the universal input range at full loading can be achieved. At normal load condition, it operates in QR mode. To minimize switching loss, the maximum switching frequency in QR mode is internally limited to 90 KHz. When the loading goes low, it operates in PFM mode for high power conversion efficiency. When the load is very small, the IC o... |
On-Bright Electronics |
Quasi-Resonant Flyback PWM Controller FEATURES OB2202 is a highly integrated Quasi-Resonant (QR) ■ Multi-Mode Operation controller optimized for high performance offline ■ Quasi-Resonant Operation at Normal Loading flyback converter applications. ■ Pulse Frequency Modulation (PFM) Operation at At normal load condition, it operates in QR mode Light Load with minimum drain voltage switching. To meet the ■ Programmable Brownout Protection and Line CISPR-22 EMI starting at 150KHz, the maximum OVP Protection switching frequency is internally limited to 130KHz. It operates in PFM mode for high power conversion a efficiency at light load condition. When the loading is very small, the IC operates in ‘Extended Burst Mode’ n to... |
On-Bright Electronics |
Quasi-Resonant Flyback PWM Controller OB2203 is a highly integrated Quasi-Resonant (QR) controller optimized for high performance offline flyback converter applications. At normal load condition, it operates in QR mode with minimum drain voltage switching. To meet the CISPR-22 EMI starting at 150KHz, the maximum switching frequency is internally limited to 130KHz. It operates in PFM mode for high power conversion efficiency at light load condition. When the loading is very small, the IC operates in ‘Extended Burst Mode’ to minimize the switching loss. As a result, lower standby power consumption and higher conversion efficiency is achieved. A built-in P-channel MOSFET and its control are integrated to automatically turn on or of... |
 On-Bright |
Primary-Side Regulation PWM Power Switch OB2211/OB2212 is an offline PWM Power switch for low power AC/DC charger and adaptor applications. It operates in primary-side sensing and regulation. Consequently, opto-coupler and TL431 could be eliminated from design. Proprietary Constant Voltage (CV) and Constant Current (CC) control is integrated as shown in the figure below. In CC control, the current and output power setting can be adjusted externally by the sense resistor Rs at CS pin. In CV control, multi-mode operations are utilized to achieve high performance and high efficiency. Device operates in fixed frequency mode at large load conditions, frequency reduction mode at light/medium load and ‘Extended burst mode’ at No/light loa... |
On-Bright Electronics |
Primary-Side PWM Power Switch OB2211H is an offline PWM Power switch for low power AC/DC charger and adaptor applications. It operates in primary-side sensing and regulation. Consequently, opto-coupler and TL431 could be eliminated. Proprietary Constant Voltage (CV) and Constant Current (CC) control is integrated as shown in the figure below. In CC control, the current and output power setting can be adjusted externally by the sense resistor Rs at CS pin. In CV control, multi-mode operations are utilized to achieve high performance and high efficiency. Device operates in fixed frequency mode at large load conditions, frequency reduction mode at light/medium load and ‘Extended burst mode’ at No/light load conditions. OB22... |
On-Bright |
Primary-Side Regulation PWM Power Switch OB2211/OB2212 is an offline PWM Power switch for low power AC/DC charger and adaptor applications. It operates in primary-side sensing and regulation. Consequently, opto-coupler and TL431 could be eliminated from design. Proprietary Constant Voltage (CV) and Constant Current (CC) control is integrated as shown in the figure below. In CC control, the current and output power setting can be adjusted externally by the sense resistor Rs at CS pin. In CV control, multi-mode operations are utilized to achieve high performance and high efficiency. Device operates in fixed frequency mode at large load conditions, frequency reduction mode at light/medium load and ‘Extended burst mode’ at No/light loa... |
On-Bright |
Primary-Side Regulation PWM Power Switch OB2216 is an offline PWM Power switch for low power AC/DC charger and adaptor applications. It operates in primary-side sensing and regulation. Consequently, opto-coupler and TL431 could be eliminated. Proprietary Constant Voltage (CV) and Constant Current (CC) control is integrated as shown in the figure below. In CC control, the current and output power setting can be adjusted externally by the sense resistor Rs at CS pin. In CV control, multi-mode operations are utilized to achieve high performance and high efficiency. Device operates in fixed frequency mode at large load conditions, frequency reduction mode at light/medium load and ‘Extended burst mode’ at No/light load conditions. OB221... |
On-Bright Electronics |
High Precision Low Cost Power Switch FEATURES OB2222M is a high performance, high precision Universal AC input range and 5.0V output and low cost PWM Power switch for non-isolated voltage buck and buck-boost application. It combines a Constant power mode operation at over load dedicated current mode PWM controller with a application high voltage power Bipolar in SOP8 package. Its Low cost and less BOM for buck and buck- built-in error amplifier is optimized for good boost applications overshoot and dynamic response for low cost and component count. With precise inner resistor divider, precise reference of EA ， constant voltage regulation of 5.0V at universal AC input Current mode control 40kHz (typical) ma... |
On-Bright Electronics |
High Precision Low Cost MCM Power Switch OB2223 is a high performance, high precision and low cost PWM Power switch for Non-isolated buck/ buck-boost and flyback application. It combines a dedicated current mode PWM controller (with a high voltage power MOSFET with SOP8/DIP8 package) and built-in error amplifier optimized for good overshoot and dynamic response for low cost and component count. With precise inner resistor divider, precise reference of EA ， accurate constant voltage regulation 12V at universal AC input can be guaranteed. For high efficiency, oscillator with frequency-reduction and burst mode control is implemented. And EMI performance is achieved with On-Bright proprietary frequency shuffling technique and soft gate... |
On-Bright Electronics |
High Precision Low Cost MCM Power Switch OB2223F is a high performance, high precision and low cost PWM Power switch for non-isolated buck and flyback application. It combines a dedicated current mode PWM controller (with a high voltage power MOSFET with SOP8/DIP7 package) and built-in error amplifier optimized for good overshoot and dynamic response for low cost and component count. With precise inner resistor divider, precise reference of EA ， accurate constant voltage regulation 12V at universal AC input can be guaranteed. For high efficiency, oscillator with frequency-reduction and burst mode control is implemented. And EMI performance is achieved with On-Bright proprietary frequency shuffling technique and soft gate driver des... |
On-Bright Electronics |
High Precision Low Cost MCM Power Switch OB2226 is a high performance, high precision and low cost PWM Power switch for non-isolated buck application. It combines a dedicated current mode PWM controller (with a high voltage power MOSFET with DIP7 package) and built-in error amplifier for low cost and component count. With precise inner resistor divider, precise reference of EA and load compensation, accurate constant voltage regulation at universal AC input can be guaranteed. For high efficiency, oscillator with frequency-reduction control is implemented. And EMI performance is achieved with On-Bright proprietary frequency shuffling technique. OB2226 offers power on soft start control and protection coverage with auto-recovery feat... |
On-Bright |
Current Mode PWM Controller OB2262 is a highly integrated current mode PWM control IC optimized for high performance, low standby power and cost effective offline flyback converter applications in sub 30W range. PWM switching frequency at normal operation is externally programmable and trimmed to tight range. At no load or light load condition, the IC operates in extended ‘burst mode’ to minimize switching loss. Lower standby power and higher conversion efficiency is thus achieved. www.DataSheet4U.com VDD low startup current and low operating current contribute to a reliable power on startup design with OB2262. A large value resistor could thus be used in the startup circuit to minimize the standby power. The internal ... |
On-Bright |
Current Mode PWM Controller OB2263 is a highly integrated current mode PWM control IC optimized for high performance, low standby power and cost effective offline flyback converter applications in sub 30W range. PWM switching frequency at normal operation is externally programmable and trimmed to tight range. At no load or light load condition, the IC operates in extended ‘burst mode’ to minimize switching loss. Lower standby power and higher conversion efficiency is thus achieved. VDD low startup current and low operating current contribute to a reliable power on startup design with OB2263. A large value resistor could thus be used in the startup circuit to minimize the standby power. The internal slope compensation i... |
 Kexin |
Current Mode PWM Controller P Ground I Feedback input pin. The PWM duty cycle is determined by voltage level into this pin and SENSE pin input. I Current sense input pin. Connected to MOSFET current sensing resistor node. P Chip DC power supply pin. O Totem-pole gate drive output for the power MOSFET. ■ Absolute Maximum Ratings Ta = 25℃ Parameter DC supply voltage VDD Zener Clamp Voltage FB VFB Input Voltage VSENSE Input Voltage to Sense Pin VCC DC clamp current Thermal Resistance Junction to Ambient Junction Temperature Operating temperature Storage Temperature Range Symbol VDD VCC VFB VSENSE ICC RθJA TJ TOPT Tstg Rating 10 to 30 VDD_Clamp+0.1V -0.3 to 7 -0.3 to 7 10 200 -20 to 150 -20 to 85 -55 to 160 Unit V mA ℃... |
 Liteon |
Current Mode PWM Controller 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 switching frequency at normal operation is externally programmable and trimmed to tight range. At no load or light load condition, the IC operates in extended ‘burst mode’ to minimize switching loss. Lower standby power and higher conversion efficiency is thus achieved. www.DataSheet4U.com VDD low startup current and low operating current contribute to a reliable power on startup design with OB2268/9. A large value resistor could thus be used in the startup circuit to minimize the standby power. T... |
 JSMICRO |
PWM controller The OB2269 is a highly integrated currentmode Low start-up current and low operating PWM controller IC for those high output current. power of off line flyback convertor. The output Comprehensive protection functions power is up to 120W. 1 、 Under voltage locked with OB2269 is integrated start-up circuit that hysteresis (UVLO) on VDD realizes low quiescent dissipation and overload compensation. J OB2269 has comprehenisve protecit onf eature S to ensure reliability of application system. M The packaging of OB2269 has SOP8 and DIP8. I Features CR Digit frequency shuffling technology to O improve EMI performance. 2、Over voltage protection (OVP) on VDD. 3、Cycle-by-Cycle current l... |