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參數(shù)資料
| 型號(hào)： | L6599AN |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, DIP16 |
| 封裝： | ROHS COMPLIANT, DIP-16 |
| 文件頁數(shù)： | 20/36頁 |
| 文件大?。?/td> | 1595K |
| 代理商： | L6599AN |
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L6599A
Application information
Doc ID 15308 Rev 5
27/36
Figure 29.
Soft-start and delayed shutdown upon overcurrent timing diagram
This function is realized with pin 2 (DELAY), by means of a capacitor CDelay and a parallel
resistor RDelay connected to ground. As the voltage on the ISEN pin exceeds 0.8 V the first
OCP comparator, in addition to discharging CSS, turns on an internal current generator that
sources 150 A from the DELAY pin and charges CDelay. During an overload/short-circuit
the OCP comparator and the internal current source will be repeatedly activated and CDelay
will be charged with an average current that depends essentially on the time constant of the
current sense filtering circuit, on CSS and the characteristics of the resonant circuit; the
discharge due to RDelay can be neglected, considering that the associated time constant is
typically much longer.
This operation will go on until the voltage on CDelay reaches 2 V, which defines the time TSH.
There is not a simple relationship that links TSH to CDelay, thus it is more practical to
determine CDelay experimentally. As a rough indication, with CDelay = 1 F TSH will be in the
order of 100 ms.
Once CDelay is charged at 2 V the internal switch that discharges CSS is forced low
continuously regardless of the OCP comparator’s output, and the 150 A current source is
continuously on, until the voltage on CDelay reaches 3.5 V. This phase lasts:
Equation 9
with TMP is expressed in ms and CDelay in F. During this time the L6599A runs at a
resonant circuit. As the voltage on CDelay is 3.5V, the L6599A stops switching and the
PFC_STOP pin is pulled low. Also the internal generator is turned off, so that CDelay will now
be slowly discharged by RDelay. The IC will restart when the voltage on CDelay will be less
than 0.3 V, which will take:
Equation 10
Delay
MP
C
10
T
=
Delay
3
.
0
5
.
3
Delay
STOP
C
R
5
.
2
ln
C
R
T
≈
=
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| L6599ATD | 功能描述:電壓模式 PWM 控制器 Sgl Output 13.3 V 200 KHz SOIC-16 Nrw 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 |
| L6599ATDTR | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 IMPROVED High-Volt RESONANT CONTROLLER RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| L6599ATN | 制造商:STMicroelectronics 功能描述: |
| L6599D | 功能描述:軟開關(guān) PWM 控制器 Hi Vltg resonant Controller RoHS:否 制造商:Fairchild Semiconductor 輸出端數(shù)量: 輸出電流: 開關(guān)頻率: 工作電源電壓:30 V 電源電流: 最大工作溫度:+ 105 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| L6599DTR | 功能描述:軟開關(guān) PWM 控制器 Hi Vltg resonant Controller RoHS:否 制造商:Fairchild Semiconductor 輸出端數(shù)量: 輸出電流: 開關(guān)頻率: 工作電源電壓:30 V 電源電流: 最大工作溫度:+ 105 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
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