- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383237 > L6566ATR (意法半導(dǎo)體) Multi-mode controller for SMPS with PFC front-end PDF資料下載
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)： | 9/51頁 |
| 文件大?。?/td> | 410K |
| 代理商： | L6566ATR |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁當前第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁
L6566A
Pin settings
9/51
5
Vcc
Supply Voltage of both the signal part of the IC and the gate driver. The internal
high voltage generator charges an electrolytic capacitor connected between this
pin and GND (pin 3) as long as the voltage on the pin is below the turn-on threshold
of the IC, after that it is disabled and the chip is turned on. The IC is disabled as the
voltage on the pin falls below the UVLO threshold. This threshold is reduced at light
load to counteract the natural reduction of the self-supply voltage. Sometimes a
small bypass capacitor (0.1 μF typ.) to GND might be useful to get a clean bias
voltage for the signal part of the IC.
6
Vcc_PFC
Supply pin output. This pin is intended for supplying the PFC controller IC in
systems comprising a PFC pre-regulator or other compatible circuitry. It is internally
connected to the Vcc pin (5) via a controlled switch. The switch is closed as the IC
starts up and opens when the voltage at pin COMP is lower than a threshold (light
load), whenever the IC is shut down (either latched or not) and during UVLO. If not
used, the pin will be left floating.
7
CS
Input to the PWM comparator. The current flowing in the MOSFET is sensed
through a resistor, the resulting voltage is applied to this pin and compared with an
internal reference to determine MOSFET’s turn-off. The pin is equipped with 150 ns
min. blanking time after the gate-drive output goes high for improved noise
immunity. A second comparison level located at 1.5V latches the device off and
reduces its consumption in case of transformer saturation or secondary diode short
circuit. The information is latched until the voltage on the Vcc pin (5) goes below
the UVLO threshold, hence resulting in intermittent operation. A logic circuit
improves sensitivity to temporary disturbances.
8
DIS
IC’s latched disable input. Internally the pin connects a comparator that, when the
voltage on the pin exceeds 4.5V, latches off the IC and brings its consumption to a
lower value. The latch is cleared as the voltage on the Vcc pin (5) goes below the
UVLO threshold, but the HV generator keeps the Vcc voltage high (see pin 1
description). It is then necessary to recycle the input power to restart the IC. For a
quick restart pull pin 16 (AC_OK) below the disable threshold (see pin 16
description).Bypass the pin with a capacitor to GND (pin 3) to reduce noise pick-up.
Ground the pin if the function is not used.
9
COMP
Control input for loop regulation. The pin will be driven by the phototransistor
(emitter-grounded) of an optocoupler to modulate its voltage by modulating the
current sunk. A capacitor placed between the pin and GND (3), as close to the IC
as possible to reduce noise pick-up, sets a pole in the output-to-control transfer
function. The dynamics of the pin is in the 2.5 to 5V range. A voltage below an
internally defined threshold activates burst-mode operation. The voltage at the pin
is bottom-clamped at about 2V. If the clamp is externally overridden and the voltage
is pulled below 1.4V the IC will shut down.
10
VREF
An internal generator furnishes an accurate voltage reference (5V±2%) that can be
used to supply few mA to an external circuit. A small film capacitor (0.1 μF typ.),
connected between this pin and GND (3), is recommended to ensure the stability of
the generator and to prevent noise from affecting the reference. This reference is
internally monitored by a separate auxiliary reference and any failure or drift will
cause the IC to latch off.
Table 2. Pin functions (continued)
N°
Pin
Function
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)。