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OB2288 데이터시트 PDF




On-Bright Electronics에서 제조한 전자 부품 OB2288은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


PDF 형식의 OB2288 자료 제공

부품번호 OB2288 기능
기능 Highly Integrated Current Mode PWM Controller
제조업체 On-Bright Electronics
로고 On-Bright Electronics 로고


OB2288 데이터시트 를 다운로드하여 반도체의 전기적 특성과 매개변수에 대해 알아보세요.



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OB2288 데이터시트, 핀배열, 회로
OB2288
Highly Integrated Current Mode PWM Controller
GENERAL DESCRIPTION
OB2288 is a highly integrated current mode PWM
controller. With internal maximum 50% duty cycle
limit, it is very suitable to be used in large power
applications, especially in forward topology.
OB2288 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), Brownout
Protection (BOP). OB2288 also features protections
against pin open and short conditions on selected
pins.
Moreover, an internal 1-second restart timer prevents
permanent OLP latch when the supply of the
controller is provided by other DC sources. In
general applications where supply is self biased by
auxiliary winding, this restart timer will never be
triggered.
In OB2288, On-Bright proprietary frequency
shuffling technique together with soft switching
control at the totem pole gate drive output help to
lower the system design barrier to achieve good EMI
performance.
To meet the increasing stringent standby power
requirements at light or no load condition, On-Bright
proprietary “Extended Burst Mode” technology eases
the system design with high performance and without
compromise in audio noise.
OB2288 is offered in SOP-8 and DIP-8 packages.
FEATURES
Maximum 50% Duty Cycle Limit
AC Line Brownout Detection & Protection (BOP)
Latch-off Mode Fault Protection
Internal Restart Timer
All Pins Floating Protection and RI Short
Protection
Proprietary Extended Burst Mode Control For
Improved Efficiency and Minimum Standby
Power Design
Audio Noise Free Operation
External Programmable PWM Switching
Frequency
Built-in Frequency Shuffling for Better EMI
Internal Leading Edge Blanking
High Precision Reference Voltage for OTP and
Brownout Protection
Power-On Soft Start
Internal Synchronized Slope Compensation
1A Peak Current Drive Capability
APPLICATIONS
Offline AC/DC Converter for
LCD TV/PC Power Supplies
Open-Frame SMPS
TYPICAL APPLICATION
©On-Bright Electronics
-1-
Confidential
OB_DOC_DS_8800
Free Datasheet http://www.datasheetlist.com/




OB2288 pdf, 반도체, 판매, 대치품
BLOCK DIAGRAM
OB2288
Highly Integrated Current Mode PWM Controller
RECOMMENDED OPERATING CONDITION
Symbol
VDD
RI
TA
Parameter
VDD Supply Voltage
RI Resistor Value
Operating Ambient Temperature
Min Max Unit
11.5 25
V
10 40 Kohm
-20 85
oC
©On-Bright Electronics
-4-
Confidential
OB_DOC_DS_8800
Free Datasheet http://www.datasheetlist.com/

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OB2288 전자부품, 판매, 대치품
CHARACTERIZATION PLOT
OB2288
Highly Integrated Current Mode PWM Controller
I_VDD vs Load
6
5
4
3
2
1
0 500 1000 1500 2000
Load(nF)
50KHz
65KHz
100KHz
250
200
150
100
50
0
10
I_RT vs RI
20 30 40
RI(Kohm)
50
150
120
90
60
30
0
10
Fosc vs RI
20 30 40
RI(Kohm)
50
Fosc vs VDD
75
70
65
60
55
50
10 13 16 19 22 25
VDD(V)
I_VDD_Startup vs Temperature
2.0
1.8
1.6
1.4
1.2
1.0
-20
10 40 70 100
Temperature()
130
6.10
VFB_Open vs Temperature
6.05
6.00
5.95
5.90
-20
10 40 70 100
Temperature()
130
©On-Bright Electronics
-7-
Confidential
OB_DOC_DS_8800
Free Datasheet http://www.datasheetlist.com/

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