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PDF OB5269 Data sheet ( Hoja de datos )
| Número de pieza | OB5269 | |
| Descripción | High Voltage Green Mode PWM Controller | |
| Fabricantes | On-Bright | |
| Logotipo |  |
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 1. Voltage Green Mode PWM Controller  Hay una vista previa y un enlace de descarga de OB5269 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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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/
1 page  
www.DataSheet.co.kr
OB5269
High Voltage Green Mode PWM Controller
ELECTRICAL CHARACTERISTICS
(TA = 25℃, VDD=15V, unless otherwise noted)
Symbol
IHV
Parameter
Supply current from HV pin
Test Conditions
VDD=2V, HV=100V
Min Typ.
2 2.8
leakage
HV pin leakage current after
startup
VDD=15V, HV=500V
Supply Voltage (VDD)
Istartup
VDD Start up Current
VDD=UVLO(OFF)-
1V, measure leakage
current into VDD
5
I_VDD_Operation Operation Current
VFB=3V
UVLO(ON)
VDD Under Voltage Lockout
Enter
1.8
8.3 9.3
UVLO(OFF)
VDD Under Voltage Lockout
Exit (Recovery)
14.3 15.3
Vpull-up
Pull-up PMOS active
12
Vdd_clamp
Ivdd=10mA
30 32
OVP(ON)
Over voltage
voltage
protection
FB=3V
Ramp up VDD until
gate clock is off
24
26
Vth_recovery
Auto release threshold
voltage
5
Vth_latch
Latch release threshold
4.2
Feedback Input Section(FB Pin)
VFB_Open
VFB Open Loop Voltage
Avcs
PWM input gain Δ VFB/ Δ
VCS
3.9 5
1.7
Maximum duty Max duty cycle @
cycle
VDD=14V,VFB=3V,VCS=0.3V
75 80
Vref_green
The threshold enter green
mode
2
Vref_burst_H
The threshold exit burst mode
1.2
Vref_burst_L
The threshold enter burst
mode
1.1
IFB_Short
FB pin short circuit current
Short FB pin to GND
and measure current
360
VTH_PL
Power Limiting FB Threshold
Voltage
3.7
TD_PL
Power limiting Debounce
Time
80 88
ZFB_IN
Input Impedance
17
Current Sense Input(CS Pin)
SST Soft start time
4
T_blanking
Leading edge blanking time
320
ZSENSE_IN
TD_OC
Input Impedance
Over Current Detection and
Control Delay
From Over Current
Occurs till the gate
driver output starts to
turn off
40
60
VTH_OC
Internal Current Limiting
Threshold Voltage with zero
duty cycle
0.72 0.75
Vocp_clamping CS voltage clamper
0.95
Oscillator
Max Unit
5 mA
10 uA
20 uA
2.5
10.3
mA
V
16.3
34
V
V
V
28 V
V
V
V
V/V
85 %
V
V
V
uA
V
96 mSec
Kohm
ms
ns
Kohm
nSec
0.78
V
V
©On-Bright Electronics
Confidential
-5-
Preliminary Datasheet
OB_DOC_DS_526902
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
www.DataSheet.co.kr
OB5269
High Voltage Green Mode PWM Controller
IMPORTANT NOTICE
RIGHT TO MAKE CHANGES
On-Bright Electronics Corp. reserves the right to make corrections, modifications, enhancements,
improvements and other changes to its products and services at any time and to discontinue any product
or service without notice. Customers should obtain the latest relevant information before placing orders
and should verify that such information is current and complete.
WARRANTY INFORMATION
On-Bright Electronics Corp. warrants performance of its hardware products to the specifications
applicable at the time of sale in accordance with its standard warranty. Testing and other quality control
techniques are used to the extent it deems necessary to support this warranty. Except where mandated
by government requirements, testing of all parameters of each product is not necessarily performed.
On-Bright Electronics Corp. assumes no liability for application assistance or customer product design.
Customers are responsible for their products and applications using On-Bright’s components, data sheet
and application notes. To minimize the risks associated with customer products and applications,
customers should provide adequate design and operating safeguards.
LIFE SUPPORT
On-Bright Electronics Corp.’s products are not designed to be used as components in devices intended to
support or sustain human life. On-bright Electronics Corp. will not be held liable for any damages or
claims resulting from the use of its products in medical applications.
MILITARY
On-Bright Electronics Corp.’s products are not designed for use in military applications. On-Bright
Electronics Corp. will not be held liable for any damages or claims resulting from the use of its products in
military applications.
©On-Bright Electronics
Confidential
- 11 -
Preliminary Datasheet
OB_DOC_DS_526902
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet OB5269.PDF ] | |
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