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OB2276A PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 OB2276A
기능 High Performance Current Mode PWM Controller
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OB2276A 데이터시트, 핀배열, 회로
OB2276A
High Performance Current Mode PWM Controller
GENERAL DESCRIPTION
OB2276A is a highly integrated current mode
PWM control IC optimized for high performance,
low standby power and cost effective offline
flyback converter applications.
PWM switching frequency at normal operation is
internally fixed and is 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 and low
standby design with OB2276A.
OB2276A offers complete protection coverage
with auto-recovery including Cycle-by-Cycle
current limiting (OCP), over load protection (OLP),
Brownout protection, VDD over voltage protection
(OVP), over temperature protection (OTP), output
over voltage protection and VDD under voltage
lockout (UVLO). Excellent EMI performance is
achieved with On-Bright proprietary frequency
shuffling technique.
The tone energy at below 22KHZ is minimized in
the design and audio noise is eliminated during
operation.
OB2276A is offered in SOP8 package.
TYPICAL APPLICATION
FEATURES
Power on Soft Start Reducing MOSFET Vds
Stress
Frequency shuffling for EMI
Extended Burst Mode Control For Improved
Efficiency and Minimum Standby Power
Design
Audio Noise Free Operation
Fixed 65KHZ Switching Frequency
Comprehensive Protection Coverage
o VDD Under Voltage Lockout with
Hysteresis (UVLO)
o Cycle-by-cycle over current threshold
setting for constant output power limiting
over universal input voltage range
o Overload Protection (OLP) with auto-
recovery
o Brownout Protection with auto-recovery
o VDD OVP with auto-recovery
o Over Temperature Protection with auto-
recovery
o Output Over Voltage Protection with auto-
recovery
APPLICATIONS
Offline AC/DC flyback converter for
Battery Charger
Power Adapter
Set-Top Box Power Supplies
Open-frame SMPS
©On-Bright Electronics
Confidential
-1-
Preliminary Datasheet
OB_DOC_DS_2276A00




OB2276A pdf, 반도체, 판매, 대치품
BLOCK DIAGRAM
OB2276A
High Performance Current Mode PWM Controller
©On-Bright Electronics
Confidential
-4-
Preliminary Datasheet
OB_DOC_DS_2276A00

4페이지










OB2276A 전자부품, 판매, 대치품
OB2276A
High Performance Current Mode PWM Controller
CHARACTERIZATION PLOTS
VDD = 18V, TA = 25condition applies if not otherwise noted.
Ivdd_startup vs Temperature
5
4
3
2
1
0
-40 -10 20 50 80 110 140
Tem perature()
Vth_otp vs Temperature
1.1
1.06
1.02
0.98
0.94
0.9
-40 -10 20 50 80 110 140
Temperature()
UVLO(ON) vs Temperature
11
10.5
10
9.5
9
8.5
8
-40 -10 20 50 80 110 140
Temperature()
Vth_oc vs duty_cycle
1
0.94
0.88
0.82
0.76
0.7
0
10 20 30 40 50 60 70
duty_cycle(%)
UVLO(OFF) vs Temperature
22
21.5
21
20.5
20
19.5
19
-40 -10 20 50 80 110 140
Temperature()
Fosc vs Temperature
70
68
66
64
62
60
-40 -10 20 50 80 110 140
Tem perature()
©On-Bright Electronics
Confidential
-7-
Preliminary Datasheet
OB_DOC_DS_2276A00

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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
OB2276

High Performance Current Mode PWM Controller

On-Bright
On-Bright
OB2276A

High Performance Current Mode PWM Controller

On-Bright Electronics
On-Bright Electronics

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