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PDF OB2358 Data sheet ( Hoja de datos )
| Número de pieza | OB2358 | |
| Descripción | Current Mode PWM Power Switch | |
| Fabricantes | On-Bright Electronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de OB2358 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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OB2358
Current Mode PWM Power Switch Freq Shuffling
GENERAL DESCRIPTION
OB2358 combines a dedicated current mode PWM
controller with a high voltage power MOSFET. It
is optimized for high performance, low standby
power, and cost effective off-line flyback converter
applications in sub 27W range.
OB2358 offers complete protection coverage with
automatic self-recovery feature including Cycle-by-
Cycle current limiting (OCP), over load protection
(OLP), VDD over voltage clamp and under voltage
lockout (UVLO). Excellent EMI performance is
achieved with On-Bright proprietary frequency
shuffling technique together with soft switching
control at the totem pole gate drive output.
www.TDahteaStohneeete4Un.ecrogmy at below 20KHZ is minimized in the
design and audio noise is eliminated during operation.
OB2358 is offered in DIP8 package.
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 50KHZ Switching Frequency
■ Internal Synchronized Slope Compensation
■ Low VDD Startup Current and Low Operating
Current
■ Leading Edge Blanking on Current Sense Input
■ Good Protection Coverage With Auto Self-
Recovery
o VDD Over Voltage Clamp and Under Voltage
Lockout with Hysteresis (UVLO)
o On-Bright Proprietary Line Input Compensated
Cycle-by-Cycle Over-current Threshold Setting
For Constant Output Power Limiting Over
Universal Input Voltage Range.
o Overload Protection (OLP).
o Over voltage Protection(OVP)
APPLICATIONS
Offline AC/DC flyback converter for
■ AC/DC adaptor
■ PDA power supplies
■ Digital Cameras and Camcorder Adaptor
■ VCR, SVR, STB, DVD&DVCD Player SMPS
■ Set-Top Box Power
■ Auxiliary Power Supply for PC and Server
■ Open-frame SMPS
TYPICAL APPLICATION
Output Power Table
406442781
Product
OB2358
230VAC±15%
Open Frame1
27W
85-265VAC
Open Frame1
16W
Notes:
1. Maximum practical continuous power in an open frame design with sufficient drain pattern as a heat sink, at 50℃ ambient.
©On-Bright Electronics
On-Bright Confidential to Microbridge
- 1 - OB_DOC_DS_5800
1 page  
OB2358
Current Mode PWM Power Switch Freq Shuffling
△f_VDD
Frequency Voltage
Stability
D_max
F_Burst
Maximum duty
cycle
Burst Mode Base
Frequency
Mosfet Section
BVdss
MOSFET Drain-
Source Breakdown
Voltage
Rdson
Static, Id=1.0A
Frequency Shuffling
∆f_OSC
Frequency
www.DataSheet4U.com
Modulation range
/Base frequency
FB=3.3V, CS =0V
5%
70 80 90 %
22 KHZ
600 V
4.4 5.5 Ώ
-4 4 %
©On-Bright Electronics
-5-
Confidential
OB_DOC_DS_5800
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet OB2358.PDF ] | |
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