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UC2825AQDWRQ1 数据表(PDF) 1 Page - Texas Instruments

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部件名 UC2825AQDWRQ1
功能描述  HIGH-SPEED PWM CONTROLLER
Download  14 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

UC2825AQDWRQ1 数据表(HTML) 1 Page - Texas Instruments

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FEATURES
DESCRIPTION
UC2825A-Q1
SLUS781 – SEPTEMBER 2007
www.ti.com
HIGH-SPEED PWM CONTROLLER
• Qualified for Automotive Applications
• Improved Version of the UC3825 PWM
The
UC2825A
pulse-width
modulation
(PWM)
controller is an improved versions of the standard
• Compatible With Voltage-Mode or
UC3825. Performance enhancements have been
Current-Mode Control Methods
made to several of the circuit blocks. Error amplifier
• Practical Operation at Switching Frequencies
gain bandwidth product is 12 MHz, while input offset
to 1 MHz
voltage is 2 mV. Current limit threshold is specified to
a tolerance of 5%. Oscillator discharge current is
• 50-ns Propagation Delay to Output
specified at 10 mA for accurate dead-time control.
• High-Current Dual Totem-Pole Outputs:
Frequency accuracy is improved to 6%. Startup
2 A (Peak)
supply current, typically 100
μA, is ideal for off-line
• Trimmed Oscillator Discharge Current
applications. The output drivers are redesigned to
actively sink current during undervoltage lockout
• Low 100-μA Startup Current
(UVLO) at no
expense
to
the
startup
current
• Pulse-by-Pulse Current-Limiting Comparator
specification. In addition, each output is capable of
• Latched Overcurrent Comparator With
2-A peak currents during transitions.
Full-Cycle Restart
BLOCK DIAGRAM
1
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.
Copyright © 2007, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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