參數(shù)資料
型號: L6599ATDTR
廠商: STMICROELECTRONICS
元件分類: 穩(wěn)壓器
英文描述: SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16
封裝: SOP-16
文件頁數(shù): 5/31頁
文件大?。?/td> 861K
代理商: L6599ATDTR
L6599AT
Application information
Doc ID 15534 Rev 3
13/31
Figure 4.
Typical system block diagram
6.1
Oscillator
The oscillator is programmed externally by means of a capacitor (CF) connected from pin 3
(CF) to ground, which is alternately charged and discharged by the current defined with the
network connected to pin 4 (RFmin). The pin provides an accurate 2 V reference with about
2 mA source capability and the higher the current sourced by the pin, the higher the
oscillator frequency. The block diagram in Figure 5 shows a simplified internal circuit that
explains the operation.
The network that loads the RFmin pin is generally made up of three branches:
1.
A resistor RFmin connected between the pin and ground, which determines the
minimum operating frequency.
2.
A resistor RFmax connected between the pin and the collector of the (emitter-grounded)
phototransistor that transfers the feedback signal from the secondary side back to the
primary side. While in operation, the phototransistor modulates the current through this
branch - thus modulating the oscillator frequency - to perform output voltage regulation.
The value of RFmax determines the maximum frequency at which the half-bridge is
operated when the phototransistor is fully saturated.
3.
An R-C series circuit (CSS+RSS) connected between the pin and ground that enables
the setup of a frequency shift at startup (see Section 6.3: Soft-start). Note that the
contribution of this branch is zero during steady-state operation.
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參數(shù)描述
L6599ATN 制造商:STMicroelectronics 功能描述:
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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
L6599N 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
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(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