參數(shù)資料
型號: LM5026
廠商: National Semiconductor Corporation
英文描述: Active Clamp Current Mode PWM Controller
中文描述: 有源鉗位電流模式PWM控制器
文件頁數(shù): 18/23頁
文件大小: 936K
代理商: LM5026
Applications Information
(Continued)
HICCUP MODE CURRENT LIMIT RESTART (RES)
The basic operation of the hiccup mode current limit restart
is described in the functional description. The delay time to
restart is programmed with the selection of the RES pin
capacitor C
RES
as illustrated in
Figure 7
. In the case of
continuous cycle-by-cycle current limit detection at the CS
pin, the time required for C
RES
to reach the 2.5V hiccup
mode threshold is:
For example, if C
RES
= 0.01 μF the time t1 is approximately
2.5 ms.
The cool down time, t2 is set by the soft-start capacitor (C
SS
)
and the internal 1 μA SS current source, and is equal to:
If C
SS
= 0.01 μF, t2 is
14 ms.
The soft-start time t3 is set by the internal 50 μA current
source, and is equal to:
20147926
FIGURE 15. Current Sense Using a Current Sense Transformer
20147927
FIGURE 16. Current Sense Using a Source Sense Resistor (R1)
L
www.national.com
18
相關PDF資料
PDF描述
LM5026MT Active Clamp Current Mode PWM Controller
LM5026MTX Active Clamp Current Mode PWM Controller
LM5026SD Active Clamp Current Mode PWM Controller
LM5026SDX Active Clamp Current Mode PWM Controller
LM5030 100V Push-Pull Current Mode PWM Controller
相關代理商/技術參數(shù)
參數(shù)描述
LM5026_09 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Active Clamp Current Mode PWM Controller
LM5026EVAL 功能描述:BOARD EVALUATION LM5026 RoHS:否 類別:編程器,開發(fā)系統(tǒng) >> 評估板 - DC/DC 與 AC/DC(離線)SMPS 系列:PowerWise® 產(chǎn)品培訓模塊:Obsolescence Mitigation Program 標準包裝: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)壓器拓撲結(jié)構(gòu):升壓 頻率 - 開關:3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969
LM5026EVAL/NOPB 功能描述:電源管理IC開發(fā)工具 LM5026 EVAL BOARD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
LM5026MT 功能描述:電流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14
LM5026MT/NOPB 功能描述:電流型 PWM 控制器 Current Mode Active Reset RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14