參數(shù)資料
型號： L6566A
廠商： 意法半導體
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： 多模式開關電源控制器，PFC前端
文件頁數(shù)： 5/51頁
文件大?。?/td> 410K
代理商： L6566A
L6566A
List of figures
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List of figures
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Block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Typical system block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Pin connection (through top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Multi-mode operation with QR option active. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
High-voltage start-up generator: internal schematic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Timing diagram: normal power-up and power-down sequences . . . . . . . . . . . . . . . . . . . . 19
Timing diagram showing short-circuit behavior (SS pin clamped at 5V). . . . . . . . . . . . . . . 20
Zero current detection block, triggering block, oscillator block and related logic . . . . . . . . 20
Drain ringing cycle skipping as the load is gradually reduced . . . . . . . . . . . . . . . . . . . . . . 21
Operation of ZCD, triggering and Oscillator blocks (QR option active). . . . . . . . . . . . . . . . 23
Load-dependent operating modes: timing diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Addition of an offset to the current sense lowers the burst-mode operation threshold. . . . 25
Adaptive UVLO block. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Possible feedback configurations that can be used with the L6566A. . . . . . . . . . . . . . . . . 26
Externally controlled burst-mode operation by driving pin COMP: timing diagram. . . . . . . 27
Typical power capability change vs input voltage in QR flyback converters . . . . . . . . . . . 28
Left: Overcurrent setpoint vs. VFF voltage; right: Line Feedforward function block . . . . . . 29
Hiccup-mode OCP: timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Possible interfaces between the L6566A and a PFC controller . . . . . . . . . . . . . . . . . . . . . 32
Operation after latched disable activation: timing diagram. . . . . . . . . . . . . . . . . . . . . . . . . 33
Soft-start pin operation under different operating conditions and settings . . . . . . . . . . . . . 34
OVP Function: internal block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
OVP function: timing diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Maximum allowed duty cycle vs. switching frequency for correct OVP detection. . . . . . . . 37
Brownout protection: internal block diagram and timing diagram. . . . . . . . . . . . . . . . . . . . 38
Ac voltage sensing with the L6566A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Slope compensation waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Typical low-cost application schematic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Typical full-feature application schematic (QR operation) . . . . . . . . . . . . . . . . . . . . . . . . . 44
Typical full-feature application schematic (FF operation) . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Frequency foldback at light load (FF operation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Latched shutdown upon mains overvoltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
相關PDF資料
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相關代理商/技術參數(shù)
參數(shù)描述
L6566A_08 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Multi-mode controller for SMPS with PFC front-end
L6566ATR 功能描述:開關變換器、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 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
L6566B 功能描述:開關變換器、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 開關頻率:1 MHz 工作溫度范圍: 安裝風格: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 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14
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