參數(shù)資料
型號(hào)： L6599N
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： 0.8 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDIP16
封裝： LEAD FREE, PLASTIC, DIP-16
文件頁(yè)數(shù)： 24/36頁(yè)
文件大?。?/td> 636K
代理商： L6599N
Application information
L6599
30/36
This concern applies to converters designed with a high resonance frequency (indicatively,
> 150 kHz), so that they run at high frequency also at full load. Otherwise, the converter will
run at high frequency only at light load, where the current flowing in the MOSFETs of the
half-bridge leg is lower, so that, generally, an RDS(on) rise is not an issue. However, it is wise
to check this point anyway and the following equation is useful to compute the drop on the
bootstrap driver:
where Qg is the gate charge of the external power MOS, RDS(on) is the on-resistance of the
bootstrap DMOS (150, typ.) and Tcharge is the ON-time of the bootstrap driver, which equals
about half the switching period minus the dead time TD. For example, using a MOSFET with
a total gate charge of 30 nC, the drop on the bootstrap driver is about 3 V at a switching
frequency of 200 kHz:
If a significant drop on the bootstrap driver is an issue, an external ultra-fast diode can be
used, thus saving the drop on the RDS(on) of the internal DMOS.
V
Drop
I
Ch
e
arg r DS
()ON
V
F
Q
g
T
Ch
e
arg
--------------------R
DS
()ON
V
F
+
=
+
=
V
Drop
30 10
9
–
2.5 10
6
–
0.3 10
6
–
–
-------------------------------------------------------150
0.6
2.7V
=
+
=
相關(guān)PDF資料
PDF描述
L6599TR 0.8 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L6599NR 功能描述:電壓模式 PWM 控制器 HV resonant CNTRL RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
L6599TR 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:High-voltage resonant controller
L65B 制造商:Electro-Mech 功能描述:
L65B3C881-00000-000 制造商:Carling Technologies 功能描述:L-SERIES ROCKER SWITCH - Bulk
L65D1CNN1-00000-000 制造商:Carling Technologies 功能描述:L-SERIES ROCKER SWITCH - Bulk
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