音影先锋亚洲天堂网|电影世界尽头的爱完整版播放|国产 熟女 91|高清无码免费观看欧美日韩|韩国一区二区三区黄色录像|美女亚洲加勒比在线|亚洲综合网 开心五月|7x成人在线入口|成人网站免费日韩毛片区|国产黄片?一级?二级?三级

UC2844 Datasheet

  • UC2844

  • CURRENTMODE PWM CONTROLLER

  • 99.97KB

  • 11頁

  • STMICROELECTRONICS   STMICROELECTRONICS

掃碼查看芯片數(shù)據(jù)手冊

上傳產(chǎn)品規(guī)格書

PDF預(yù)覽

廬
UC2842/3/4/5
UC3842/3/4/5
CURRENT MODE PWM CONTROLLER
.
.
.
.
.
.
.
.
.
.
.
OPTIMIZED FOR OFF-LINE AND DC TO DC
CONVERTERS
LOW START-UP CURRENT (< 1 mA)
AUTOMATIC FEED FORWARD COMPENSA-
TION
PULSE-BY-PULSE CURRENT LIMITING
ENHANCED LOAD RESPONSE CHARAC-
TERISTICS
UNDER-VOLTAGE LOCKOUT WITH HYSTER-
ESIS
DOUBLE PULSE SUPPRESSION
HIGH CURRENT TOTEM POLE OUTPUT
INTERNALLY TRIMMED BANDGAP REFER-
ENCE
500 KHz OPERATION
LOW R
O
ERROR AMP
Minidip
SO14
DESCRIPTION
TheUC3842/3/4/5family of controlICs provides the
necessary features to implement off-line or DC to
DC fixed frequency current mode control schemes
with a minimal externalparts count.Internallyimple-
mentedcircuits include undervoltagelockout featur-
ing start-up current less than 1 mA, a precision ref-
erence trimmed for accuracy at the error amp input,
logic to insure latched operation, a PWM compara-
torwhich also providescurrentlimit control,and a to-
tem pole output stage designed to source or sink
high peak current. The output stage, suitable for
driving N-Channel MOSFETs, is low in theoff-state.
Differences between members of this family are the
under-voltage lockout thresholds and maximum
duty cycle ranges. The UC3842 and UC3844 have
UVLO thresholds of 16V (on) and 10V (off), ideally
suited off-line applications The corresponding
thresholds for the UC3843 and UC3845 are 8.5 V
and 7.9 V. The UC3842 and UC3843 can operate
to duty cycles approaching 100%. A range of the
zero to < 50 % is obtained by the UC3844 and
UC3845 by the additionof an internal toggle flip flop
which blanks the output off every other clock cycle.
BLOCK DIAGRAM
(toggle flip flop used only in U3844 and UC3845)
October 1998
1/11

UC2844相關(guān)型號PDF文件下載

您可能感興趣的PDF文件資料

熱門IC型號推薦

掃碼下載APP，
一鍵連接廣大的電子世界。

在線人工客服

買家服務(wù)：
賣家服務(wù)：
技術(shù)客服：

0571-85317607

網(wǎng)站技術(shù)支持

13606545031

客服在線時(shí)間周一至周五
9:00-17:30

關(guān)注官方微信號，
第一時(shí)間獲取資訊。

建議反饋
返回頂部

建議反饋

聯(lián)系人：

聯(lián)系方式：

按住滑塊，拖拽到最右邊
>>
感謝您向阿庫提出的寶貴意見，您的參與是維庫提升服務(wù)的動力！意見一經(jīng)采納，將有感恩紅包奉上哦！