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OB2298 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 OB2298
기능 PWM Controller
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OB2298 데이터시트, 핀배열, 회로
OB2298
PWM Controller with PFC Standby Control
GENERAL DESCRIPTION
OB2298 is a highly integrated current mode PWM
controller for medium to high power offline flyback
converter applications.
OB2298 integrates PFC IC power supply control
function and shuts down PFC stage at no load or light
load conditions.
To meet the increasing stringent standby power
requirements in light or zero load, OB2298 operates
in On-Bright’s proprietary “extended burst mode”
without audio noise. Constant power limit is achieved
by On-Bright’s proprietary OCP compensation
technique where OCP due to CCM and DCM mode
difference is compensated in universal AC input
applications.
OB2298 offers comprehensive protection coverage
including Cycle-by-Cycle current limiting, internal
Power-On Soft Start, VDD Under Voltage Lockout
(UVLO), VDD Over Voltage Protection (OVP),
VDD Clamp, Gate Clamp, Over Load Protection
(OLP), Over Temperature Protection (OTP),
Programmable Brownout Protection, All Pins
Floating Protection, and RT Latch triggering feature.
In applications where VDD is supplied by auxiliary
power supply, the built-in 1 second restart timer can
prevent permanent OLP latch. In other applications,
this restart timer will not be triggered.
To achieve good EMI performance, On-Bright’s
proprietary built-in frequency shuffling is provided,
also with soft switching control at the totem pole gate
drive output.
OB2298 is offered in SOP-8 and DIP-8 packages.
FEATURES
Direct Control of PFC
Programmable Brownout Protection
Internal 4ms Power On Soft Start Time
Internal Restart Timer
Pin Floating Protection
Proprietary Extended Burst Mode Control For
Improved Efficiency and Minimum Standby
Power Design
Built-in Frequency Shuffling for Better EMI
Built-in Leading Edge Blanking
Proprietary OCP Compensation for Universal AC
Input Range
Low Startup Current(5uA) and Low Operating
Current (2.3mA)
Built-in Synchronized Slope Compensation
1.0A Peak Current Driving Capability
Audio Noise Free Operation
Convenient High and Low Triggering Level
Latch Off Function
APPLICATIONS
Offline AC/DC flyback converter for
Laptop Power Adaptor
LCD Monitor Power
LCD TV Power and Home Appliance Power
Printer Power
Lighting Power
TYPICAL APPLICATION
©On-Bright Electronics
-1-
Confidential
OB_DOC_DS_9800
Free Datasheet http://www.datasheet4u.com/




OB2298 pdf, 반도체, 판매, 대치품
BLOCK DIAGRAM
OB2298
PWM Controller with PFC Standby Control
RECOMMENDED OPERATING CONDITION
Symbol
VDD
TA
Parameter
VDD Supply Voltage
Operating Ambient Temperature
Min Max Unit
12 25 V
-20 85
oC
©On-Bright Electronics
-4-
Confidential
OB_DOC_DS_9800
Free Datasheet http://www.datasheet4u.com/

4페이지










OB2298 전자부품, 판매, 대치품
OB2298
PWM Controller with PFC Standby Control
Restart Timer Section
RST_auto
Auto recovery restart
timer
PFCVCC section
Rdson
Switch on resistor
Tpfc_off_delay PFC go to standby
debounce time
Tpfc_on_delay PFC on debounce
time
Capable of delivering 40mA 10
1
20 30
125
10
Sec
Ω
ms
mS
©On-Bright Electronics
-7-
Confidential
OB_DOC_DS_9800
Free Datasheet http://www.datasheet4u.com/

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전력 반도체 판매 ( IGBT, TR 모듈, SCR, 다이오드 모듈 )

휴대전화 : 010-3582-2743


상호 : 아이지 인터내셔날

전화번호 : 051-319-2877, [ 홈페이지 ]



링크공유

링크 :

관련 데이터시트

부품번호상세설명 및 기능제조사
OB2298

PWM Controller

On-Bright Electronics
On-Bright Electronics

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