Datasheet > OB2202

OB2202

更新时间： 2024-09-26 12:56:43

品牌	Logo	应用领域
安森美 - ONSEMI		控制器
页数	文件大小	规格书
14页	301K
描述
Quasi-Resonant Flyback PWM Controller

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中文翻译

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OB2202 数据手册

OB2202

Quasi-Resonant Flyback PWM Controller

Product Specification

GENERAL DESCRIPTION

FEATURES

OB2202 is a highly integrated Quasi-Resonant

(QR) controller optimized for high performance

offline flyback converter applications.

■

Multi-Mode Operation

Quasi-Resonant Operation at Normal Loading

Pulse Frequency Modulation (PFM) Operation

at Light Load

Burst Mode at No Load

Programmable Brownout Protection and Line

OVP Protection

At normal load condition, it operates in QR mode

with minimum drain voltage switching. To meet the

CISPR-22 EMI starting at 150KHz, the maximum

switching frequency is internally limited to 130KHz.

It operates in PFM mode for high power

conversion efficiency at light load condition. When

the loading is very small, the IC operates in

‘Extended Burst Mode’ to minimize the switching

■

Excellent OPP Compensation

130KHz Maximum Frequency Limit

Internal

Minimum

T_off

for

Ringing

Suppression

loss. As

result, lower standby power

■

30us Maximum On Time Limit

50us Maximum Off Time Limit

Internal Leading Edge Blanking

Programmable Soft-start

Cycle-by-cycle Current Limiting

External Latch Triggering

Internal Thermal Shutdown

1A Peak Current Sink/Source Capability

Programmable Output OVP

consumption and higher conversion efficiency can

be achieved.

OB2202

coverage including Cycle-by-Cycle Current

Limiting, VCC Under Voltage Lockout(UVLO),

Programmable

offers

comprehensive

protection

Output

Over

Voltage

Protection(OVP), VCC Clamp, Gate Clamp, Over

Load Protection(OLP), On-chip Thermal Shutdown,

Programmable

Soft

Start,

Programmable

Brownout Protection, Programmable Over Power

Protection (OPP) Compensation, and External

Latch Triggering, Max On-time Limit, etc.

APPLICATIONS

Offline AC/DC flyback converter for

■

Power Adaptor and Open-frame SMPS

LCD Monitor/TV/PC/Set-Top Box Power

Supplies

OB2202 is offered in SOP-8 and DIP-8 packages.

■

NB/DVD/Portable DVD Power Supplies

TYPICAL APPLICATION

©On-Bright Electronics

Confidential

Datasheet

OB_DOC_DS_2202A3

- 1 -

12 3 4 5 6 7...14

中文翻译

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