Datasheet > UC3826DW

UC3826DW

更新时间： 2024-11-03 23:38:55

品牌	Logo	应用领域
其他 - ETC		开关控制器
页数	文件大小	规格书
11页	542K
描述
Current-Mode SMPS Controller

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中文翻译

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数据手册

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UC3826DW 数据手册

UC1826

UC2826

UC3826

Secondary Side Average Current Mode Controller

FEATURES

DESCRIPTION

The UC1826 family of average current mode controllers accurately

accomplishes secondary side average current mode control. The sec-

ondary side output voltage is regulated by sensing the output voltage

and differentially sensing the AC switching current. The sensed output

voltage drives a voltage error amplifier.The AC switching current, mon-

itored by a current sense resistor, drives a high bandwidth, low offset

current error amplifier. The output of the voltage error amplifier can be

used to drive the current amplifier which filters the measured inductor

current. Fast transient response is accomplished by utilizing voltage

feedforward in generating the PWM ramp.

•

Practical Secondary Side Control of

Isolated Power Supplies

•

1MHz Operation

Tailored Loop Bandwidth Provides

Excellent Noise Immunity

•

Voltage Feedforward Provides

Superior Transient Response

Accurate Programmable Maximum

Duty Cycle

The UC1826 features load share, oscillator synchronization, undervolt-

age lockout, and programmable output control. Multiple chip operation

can be achieved by connecting up to ten UC1826 chips in parallel.The

SHARE bus and CLKSYN bus provide load sharing and synchroniza-

tion to the fastest oscillator respectively.With its tailored bandwidth, the

UC1826 provides excellent noise immunity and is an ideal controller to

achieve high power, secondary side average current mode control.

Multiple Chips Can be Synchronized

to Fastest Oscillator

Wide Gain Bandwidth Product

(70MHz, Acl>10) Current Error

Amplifier

•

Up to Ten Devices Can Easily Share

a Common Load

BLOCK DIAGRAM

Pin Numbers refer to 24-pin packages.

7/95

UDG-95013

12 3 4 5 6 7...11

中文翻译

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