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5962-8670403XA

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型号: 5962-8670403XA
PDF文件:
  • 5962-8670403XA PDF文件
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功能描述: CURRENT MODE PWM CONTROLLER
PDF文件大小: 693.83 Kbytes
PDF页数: 共28页
制造商: TI[Texas Instruments]
制造商LOGO: TI[Texas Instruments] LOGO
制造商网址: http://www.ti.com
捡单宝5962-8670403XA
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  • 万三科技(深圳)有限公司

    6

    0755-2100667218188642307王小康0755-21006672深圳市龙华区民治街道新牛社区金地梅陇镇9栋4单元14C万三科技,秉承原装11013028

  • 5962-8670403XA
  • TexasInstruments(德州仪器) 
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    0755-8328588218188616606陈妍深圳市福田区深南中路3023号汉国中心55楼11010804

  • 5962-8670403XA
  • TI 
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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

  • 5962-8670403XA
  • TI 
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  • 22+ 
  • 60000 
  • 全新原装,特价出售 

  • 深圳市星诚通电子有限公司

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  • TI 
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PDF页面索引
120%
www.ti.com
FEATURES DESCRIPTION
BLOCK DIAGRAM
11
A/B
V
cc
7 12
5 9
GROUND
4 7
R
T
/C
T
2 3
V
FB
1 1COMP
3 5
CURRENT
SENSE
34 V
2.50 V
OSC
UVLO
S/R
5 V
REF
VREF
Good
Logic
Internal
BIAS
Error
Amp
2R
R
1 V
CURRENT
SENSE
COMPARATOR
PWM
LATCH
S
R
T
8 14
V
REF
5 V
50 mA
7
V
C
106
OUTPUT
85
POWER
GROUND
Note 1:
Note 2:
A = DIL−8 Pin Number. B = SO−14 and CFP−14 Pin Number.
Toggle flip flop used only in 1844 and 1845.
UC1842/3/4/5
UC2842/3/4/5
UC3842/3/4/5
SLUS223C APRIL 1997 REVISED JUNE 2007
CURRENT MODE PWM CONTROLLER
Optimized For Off-line and DC-to-DC
The UC1842/3/4/5 family of control devices provides
Converters
the necessary features to implement off-line or
dc-to-dc fixed frequency current mode control
Low Start-Up Current (<1 mA)
schemes with a minimal external parts count.
Automatic Feed Forward Compensation
Internally implemented circuits include under-voltage
Pulse-by-Pulse Current Limiting
lockout featuring start up current less than 1 mA, a
precision reference trimmed for accuracy at the error
Enhanced Load Response Characteristics
amp input, logic to insure latched operation, a PWM
Under-Voltage Lockout With Hysteresis
comparator which also provides current limit control,
Double Pulse Suppression
and a totem pole output stage designed to source or
sink high peak current. The output stage, suitable for
High Current Totem Pole Output
driving N-Channel MOSFETs, is low in the off state.
Internally Trimmed Bandgap Reference
Differences between members of this family are the
500-kHz Operation
under-voltage lockout thresholds and maximum duty
Low R
O
Error Amp
cycle ranges. The UC1842 and UC1844 have UVLO
thresholds of 16 V
ON
and 10 V
OFF
, ideally suited to
off-line applications. The corresponding thresholds
for the UC1843 and UC1845 are 8.4 V and 7.6 V.
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.
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 © 1997–2007, 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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