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參數(shù)資料
| 型號： | L6599D |
| 廠商： | 意法半導體 |
| 英文描述： | High-voltage resonant controller |
| 中文描述： | 高壓諧振控制器 |
| 文件頁數(shù)： | 17/36頁 |
| 文件大?。?/td> | 591K |
| 代理商： | L6599D |
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L6599
Application information
17/36
After fixing CF in the hundred pF or in the nF (consistently with the maximum source
capability of the RF
min
pin and trading this off against the total consumption of the device),
the value of RF
min
and RF
max
will be selected so that the oscillator frequency is able to
cover the entire range needed for regulation, from the minimum value f
min
(at minimum input
voltage and maximum load) to the maximum value f
max
(at maximum input voltage and
minimum load):
A different selection criterion will be given for RF
max
in case burst-mode operation at no-load
will be used (see "Operation at no load or very light load" section).
Figure 22. Oscillator waveforms and their relationship with gate-driving signals
In
Figure 22
the timing relationship between the oscillator waveform and the gate-drive
signals, as well as the swinging node of the half-bridge leg (HB) is shown. Note that the low-
side gate-drive is turned on while the oscillator's triangle is ramping up and the high-side
gate-drive is turned on while the triangle is ramping down. In this way, at start-up, or as the
IC resumes switching during burst-mode operation, the low-side MOSFET will be switched
on first to charge the bootstrap capacitor. As a result, the bootstrap capacitor will always be
charged and ready to supply the high-side floating driver.
RF
min
3
CF
f
min
-----------------------------------
=
RF
max
RF
f
min
----------
1
–
--------------------
=
CF
HVG
t
t
LVG
t
HB
t
T
D
T
D
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| L6599DTR | 功能描述:軟開關 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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| L6599N | 功能描述:軟開關 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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| 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 拓撲結構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 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: |
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