參數(shù)資料
型號(hào)： LM5021NA-2
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： AC-DC Current Mode PWM Controller
中文描述： 0.7 A SWITCHING CONTROLLER, 560 kHz SWITCHING FREQ-MAX, PDIP8
封裝： PLASTIC, DIP-8
文件頁(yè)數(shù)： 1/15頁(yè)
文件大?。?/td> 746K
代理商： LM5021NA-2
LM5021
AC-DC Current Mode PWM Controller
General Description
The LM5021 off-line pulse width modulation (PWM) control-
ler contains all of the features needed to implement highly
efficient off-line single-ended flyback and forward power con-
verters using current-mode control. The LM5021 features
include an ultra-low (25 μA) start-up current, which mini-
mizes power losses in the high voltage start-up network. A
skip cycle mode reduces power consumption with light loads
for energy conserving applications (ENERGY STAR
,
CECP, etc.). Additional features include under-voltage lock-
out, cycle-by-cycle current limit, hiccup mode overload pro-
tection, slope compensation, soft-start and oscillator syn-
chronization capability. This high performance 8-pin IC has
total propagation delays less than 100nS and a 1MHz ca-
pable oscillator that is programmed with a single resistor.
Features
n
Ultra Low Start-up Current (25 μA maximum)
n
Current Mode Control
n
Skip Cycle Mode for Low Standby Power
n
Single Resistor Programmable Oscillator
n
Synchronizable Oscillator
n
Adjustable Soft-start
n
Integrated 0.7A Peak Gate Driver
n
Direct Opto-Coupler Interface
n
Maximum Duty Cycle Limiting (80% for LM5021-1 or
50% for LM5021-2)
n
Slope Compensation for (LM5021-1 Only)
n
Under Voltage Lockout (UVLO) with Hysteresis
n
Cycle-by-Cycle Over-Current Protection
n
Hiccup Mode for Continuous Overload Protection
n
Leading Edge Blanking of Current Sense Signal
n
Packages: MSOP-8 or MDIP-8
Simplified Application Diagram
20144201
May 2005
L
2005 National Semiconductor Corporation
DS201442
www.national.com
相關(guān)PDF資料
PDF描述
LM5021MMX-1 AC-DC Current Mode PWM Controller
LM5021MMX-2 AC-DC Current Mode PWM Controller
LM5021 AC-DC Current Mode PWM Controller
LM5025A Active Clamp Voltage Mode PWM Controller
LM5025AMTC Active Clamp Voltage Mode PWM Controller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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LM5022 制造商:NSC 制造商全稱:National Semiconductor 功能描述:60V Low Side Controller for Boost and SEPIC
LM5022_09 制造商:NSC 制造商全稱:National Semiconductor 功能描述:60V Low Side Controller for Boost and SEPIC
LM5022BSTBLDT/NOPB 制造商:Texas Instruments 功能描述:60V LOW SIDE CONTROLLER FOR BOOST AND S - Boxed Product (Development Kits) 制造商:Texas Instruments 功能描述:IC REG CTRLR BST PWM
LM5022EVAL 功能描述:BOARD EVALUATION LM5022 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估板 - DC/DC 與 AC/DC（離線）SMPS 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):升壓 頻率 - 開關(guān):3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969
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