Datasheet > UC2825A-Q1

UC2825A-Q1

更新时间： 2024-11-04 11:58:39

品牌	Logo	应用领域
德州仪器 - TI		控制器
页数	文件大小	规格书
14页	415K
描述
HIGH-SPEED PWM CONTROLLER

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UC2825A-Q1 数据手册

UC2825A-Q1

www.ti.com

SLUS781–SEPTEMBER 2007

HIGH-SPEED PWM CONTROLLER

FEATURES

DESCRIPTION

•

Qualified for Automotive Applications

•

Improved Version of the UC3825 PWM

The UC2825A pulse-width modulation (PWM)

controller is an improved versions of the standard

UC3825. Performance enhancements have been

made to several of the circuit blocks. Error amplifier

gain bandwidth product is 12 MHz, while input offset

voltage is 2 mV. Current limit threshold is specified to

a tolerance of 5%. Oscillator discharge current is

specified at 10 mA for accurate dead-time control.

Frequency accuracy is improved to 6%. Startup

supply current, typically 100 μA, is ideal for off-line

applications. The output drivers are redesigned to

actively sink current during undervoltage lockout

(UVLO) at no expense to the startup current

specification. In addition, each output is capable of

2-A peak currents during transitions.

Compatible With Voltage-Mode or

Current-Mode Control Methods

•

Practical Operation at Switching Frequencies

to 1 MHz

•

50-ns Propagation Delay to Output

High-Current Dual Totem-Pole Outputs:

2 A (Peak)

•

Trimmed Oscillator Discharge Current

Low 100-μA Startup Current

Pulse-by-Pulse Current-Limiting Comparator

Latched Overcurrent Comparator With

Full-Cycle Restart

BLOCK DIAGRAM

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...14

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