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5962-8670402XA

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型号: 5962-8670402XA
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  • 5962-8670402XA PDF文件
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功能描述: Current Mode PWM Controller
PDF文件大小: 937.89 Kbytes
PDF页数: 共3页
制造商: TI[Texas Instruments]
制造商LOGO: TI[Texas Instruments] LOGO
制造商网址: http://www.ti.com
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  • 集好芯城

    16

    0755-8328588218188616606陈妍深圳市福田区深南中路3023号汉国中心55楼11010804

  • 5962-8670402XA
  • TI 
  • LCCC(FK) 
  • 最新批号 
  • 20000 
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  • 深圳市芯泽盛世科技有限公司

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    0755-8969728513714720314朱先生0755-89697285龙岗区平湖街道平湖社区平安大道3号铁东物流区11栋161711011794

  • 5962-8670402XA
  • TI 
  • VSSOP(DGK) 
  • 22+ 
  • 60000 
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  • 深圳市星诚通电子有限公司

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    +8613751158229+8613751158229陈先生0755-61685015深圳市福田区红荔路38号群星广场A座281711016053

  • 5962-8670402XA
  • TI 
  • LCCC 
  • 22+ 
  • 15000 
  • 只有原装,只做现货 

PDF页面索引
120%
UC1842/3/4/5
UC2842/3/4/5
UC3842/3/4/5
Current Mode PWM Controller
FEATURES
Optimized For Off-line And DC
To DC Converters
Low Start Up Current (<1mA)
Automatic Feed Forward
Compensation
Pulse-by-pulse Current Limiting
Enhanced Load Response
Characteristics
Under-voltage Lockout With
Hysteresis
Double Pulse Suppression
High Current Totem Pole
Output
Internally Trimmed Bandgap
Reference
500khz Operation
Low R
O Error Amp
DESCRIPTION
The UC1842/3/4/5 family of control ICs provides the necessary features to
implement off-line or DC to DC fixed frequency current mode control schemes
with a minimal external parts count. Internally implemented circuits include
under-voltage lockout featuring start up current less than 1mA, a precision
reference trimmed for accuracy at the error amp input, logic to insure latched
operation, a PWM comparator which also provides current limit control, and a
totem pole output stage designed to source or sink high peak current. The
output stage, suitable for driving N Channel MOSFETs, is low in the off state.
Differences between members of this family are the under-voltage lockout
thresholds and maximum duty cycle ranges. The UC1842 and UC1844 have
UVLO thresholds of 16V (on) and 10V (off), ideally suited to off-line
applications. The corresponding thresholds for the UC1843 and UC1845 are
8.4V and 7.6V. The UC1842 and UC1843 can operate to duty cycles
approaching 100%. A range of zero to 50% is obtained by the UC1844 and
UC1845 by the addition of an internal toggle flip flop which blanks the output
off every other clock cycle.
BLOCK DIAGRAM
A/B
Note 1: A = DIL-8 Pin Number. B = SO-14 and CFP-14 Pin Number.
Note 2: Toggle flip flop used only in 1844 and 1845.
SLUS223A - APRIL 1997 - REVISED MAY 2002
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