OB2354 On-Bright Electronics, Inc., OB2354 Datasheet

OB2354

Manufacturer Part Number

OB2354

Description

Current Mode Pwm Power Switch

Manufacturer

On-Bright Electronics, Inc.

Datasheet

1.OB2354.pdf (1 pages)

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GENERAL DESCRIPTION

OB2354 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 20W range.

OB2354 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).

achieved with On-Bright proprietary frequency

shuffling technique together with soft switching

control at the totem pole gate drive output.

The tone energy at below 20KHZ is minimized in the

design and audio noise is eliminated during operation.

OB2354 is offered in DIP8 package.

FEATURES

■

TYPICAL APPLICATION

Output Power Table

Notes:

©On-Bright Electronics

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

Maximum practical continuous power in an open frame design with sufficient drain pattern as a heat sink, at 50

Product

OB2354

Excellent EMI performance is

230VAC±15%

Open Frame

21W

Current Mode PWM Power Switch

- 1 -

■

APPLICATIONS

Offline AC/DC flyback converter for

■

o VDD Over Voltage Clamp and Under Voltage

o On-Bright Proprietary Line Input Compensated

o Overload Protection (OLP).

o Over voltage Protection(OVP)

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

Battery Charger

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

Lockout with Hysteresis (UVLO)

Cycle-by-Cycle Over-current Threshold Setting

For Constant Output Power Limiting Over

Universal Input Voltage Range.

Open Frame

85-265VAC

16W

OB_DOC_DS_5402

℃

ambient.

Freq Shuffling

Confidential

OB2354

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