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参数资料
| 型号： | L6599N |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 0.8 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDIP16 |
| 封装： | LEAD FREE, PLASTIC, DIP-16 |
| 文件页数： | 24/36页 |
| 文件大小： | 636K |
| 代理商： | L6599N |
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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
=
+
=
相关PDF资料 |
PDF描述 |
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| L6599TR | 0.8 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
| L6610D | 6-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO24 |
| L6610N | 6-CHANNEL POWER SUPPLY SUPPORT CKT, PDIP24 |
| L6611DTRT | POWER SUPPLY SUPPORT CKT, PDSO20 |
| L6611D | 5-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| L6599NR | 功能描述:电压模式 PWM 控制器 HV resonant CNTRL RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| L6599TR | 制造商:STMICROELECTRONICS 制造商全称: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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