參數(shù)資料
型號： L6566ATR
廠商： 意法半導(dǎo)體
元件分類： 基準電壓源/電流源
英文描述： Multi-mode controller for SMPS with PFC front-end
中文描述： 多模式開關(guān)電源控制器，PFC前端
文件頁數(shù)： 34/51頁
文件大?。?/td> 410K
代理商： L6566ATR
Application information
L6566A
34/51
operating, so that the converter will work intermittently, which is very safe. In case of
overload the system has a power capability lower than that at nominal load but the output
current may be quite high and overstress the output rectifier. In case of FF operation the
capability is almost unchanged and both short circuit and overload conditions are more
critical to handle.
The L6566A, regardless of the operating option selected, makes it easier to handle such
conditions: the 2V clamp on the SS pin is removed and a second internal current generator
I
SS2
= I
SS1
/4 keeps on charging Css. As the voltage reaches 5V the device is disabled, if it is
allowed to reach 2 V
BE
over 5V, the device will be latched off. In the former case the
resulting behavior will be identical to that under short circuit illustrated in
Figure 6 on
page 19
; in the latter case the result will be identical to that of
Figure 20 on page 33
.
See
Section 5.9: Latched disable function on page 32
for additional details.
A diode, with the anode to the SS pin and the cathode connected to the VREF pin (10) is the
simplest way to select either auto-restart mode or latch-mode behavior upon overcurrent. If
the overload disappears before the Css voltage reaches 5V the I
SS2
generator will be turned
off and the voltage gradually brought back down to 2V. Refer to the
Section 6: Application
examples and ideas on page 44
section (
Figure 8 on page 45
) for additional hints.
If latch-mode behavior is desired also for converter’s short circuit, make sure that the supply
voltage of the device does not fall below the UVLO threshold before activating the latch.
Figure 21
shows soft-start pin behavior under different operating conditions and with
different settings (latch-mode or autorestart).
Note:
Unlike other PWM controllers provided with a soft-start pin, in the L6566A grounding the SS
pin does not guarantee that the gate driver is disabled.
Figure 21. Soft-start pin operation under different operating conditions and settings
t
Vcc
(pin 5)
SS
(pin 14)
t
t
COMP
(pin 9)
START-UP
TEMPORARY
OVERLOAD
OVERLOAD
t
GD
(pin 4)
NORMAL
OPERATION
NORMAL
OPERATION
RESTART
here the IC
shuts down
here the IC
latches off
Vcc falls below UVLO
before latching off
SHUTDOWN
LATCHED
AUTORESTART
UVLO
2V
5V
5V+2Vbe
t
Vcc_PFC
(pin 6)
相關(guān)PDF資料
PDF描述
L6566B Multi-mode controller for SMPS
L6566BTR Multi-mode controller for SMPS
L6567 HIGH VOLTAGE DRIVER FOR CFL
L6567D HIGH VOLTAGE DRIVER FOR CFL
L6571B High Voltage Half Bridge Driver with Oscillator(帶晶振的高電壓半橋驅(qū)動器)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L6566B 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Multi Mode PWM 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
L6566B_08 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Multi-mode controller for SMPS
L6566BH 功能描述:電流型 PWM 控制器 Multimode Controller SMPS 800V <3mA RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14
L6566BHTR 功能描述:電流型 PWM 控制器 MULTIMODE CONTROLLER SMPS 8V 3 mA RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14
L6566BTR 功能描述:電流型 PWM 控制器 MultiMode Controller for SMPS RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*