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OB5269 PDF 데이터시트 ( Data , Function )

부품번호 OB5269 기능
기능 High Voltage Green Mode PWM Controller
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OB5269 데이터시트, 핀배열, 회로
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OB5269
High Voltage Green Mode PWM Controller
GENERAL DESCRIPTION
OB5269 is a highly integrated current mode PWM
control IC with high voltage start up, optimized for
high performance, low standby power
consumption and cost effective offline flyback
converter applications.
PWM switching frequency at normal operation is
internally fixed and is trimmed to a tight range. At
no load or light load condition, the IC operates in
extended ‘burst mode’ to minimize switching loss.
Very low standby power consumption and very
high conversion efficiency is thus achieved.
High voltage startup is implemented in OB5269,
which features with short startup time and low
standby current.
OB5269 offers complete protection coverage with
auto-recovery including Cycle-by-Cycle current
limiting (OCP), over load protection (OLP), and
VDD under voltage lockout (UVLO). It also
provides the protections with latched shut down
including over temperature protection (OTP), and
over voltage (fixed or adjustable) protection (OVP).
Excellent EMI performance is achieved with On-
Bright proprietary frequency shuffling technique.
The tone energy at below 22KHZ is minimized to
avoid audio noise during operation.
OB5269 is offered in SOP8 package.
FEATURES
High Voltage Startup
Power on Soft Start Reducing MOSFET Vds
Stress
Frequency shuffling for EMI
Extended Burst Mode Control For Improved
Efficiency and Minimum Standby Power
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 protection
(OCP)
o Overload Protection (OLP) with auto-
recovery
o Over Temperature Protection (OTP) with
latch shut down
o VDD Over voltage Protection(OVP) with
latch shut down
o Adjustable OVP through external Zener
APPLICATIONS
Offline AC/DC flyback converter for
Battery Charger
Power Adaptor
Open-frame SMPS
TYPICAL APPLICATION
©On-Bright Electronics
Confidential
-1-
Preliminary Datasheet
OB_DOC_DS_526902
Datasheet pdf - http://www.DataSheet4U.net/




OB5269 pdf, 반도체, 판매, 대치품
www.DataSheet.co.kr
BLOCK DIAGRAM
VDD
6
OB5269
High Voltage Green Mode PWM Controller
RT 1
HV 8
HV
star
t
Vth_ovp
Vth_otp
Internal supply
LDO
UVLO
PORb
OVP
Clamp
RQ
S
Burst
mode
Latch
Soft
Driver
5 GATE
Logic
Control
Soft Start
CS Float
OSC
Extended
Burst mode
OCP
CPL Vth
Slope
compensation
LEB
3 CS
5V
PWM
Comparator
Debounce
OLP
R
2 FB
R
4
GND
©On-Bright Electronics
Confidential
-4-
Preliminary Datasheet
OB_DOC_DS_526902
Datasheet pdf - http://www.DataSheet4U.net/

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OB5269 전자부품, 판매, 대치품
www.DataSheet.co.kr
OB5269
High Voltage Green Mode PWM Controller
CHARACTERIZATION PLOTS
VDD = 15V, TA = 25condition applies if not otherwise noted.
I_startup(uA) vs Temperature()
Vth_otp(V) vs Temperature()
1.01
16
14 1
12
10
8
-40
0 40 80
Tem perature()
120
0.99
0.98
-40
0 40 80
Tem perature()
120
UVLO_on(V) vs Temperature()
UVLO_off(V) vs Temperature()
9.6
9.4
9.2
9
-40
0 40 80
Tem perature()
120
15.8
15.6
15.4
15.2
15
-40
0 40 80
Tem perature()
120
1
0.95
0.9
0.85
0.8
0.75
0.7
0
Vth_OC(V) vs Duty(%)
20 40
Duty(%)
60
80
Fosc(KHz) vs Temperature()
65.5
65
64.5
64
-40
0 40 80
Tem perature()
120
©On-Bright Electronics
Confidential
-7-
Preliminary Datasheet
OB_DOC_DS_526902
Datasheet pdf - http://www.DataSheet4U.net/

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OB5269

High Voltage Green Mode PWM Controller

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High Voltage Green Mode PWM Controller

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