參數(shù)資料
型號(hào)： L6566A
廠商： 意法半導(dǎo)體
元件分類： 基準(zhǔn)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(kāi)關(guān)電源控制器，PFC前端
文件頁(yè)數(shù)： 35/51頁(yè)
文件大小： 410K
代理商： L6566A
L6566A
Application information
35/51
5.11
OVP block
The OVP function of the L6566A monitors the voltage on the ZCD pin (11) in MOSFET’s
OFF-time, during which the voltage generated by the auxiliary winding tracks converter’s
output voltage. If the voltage on the pin exceeds an internal 5V reference, a comparator is
triggered, an overvoltage condition is assumed and the device is shut down. An internal
current generator is activated that sources 1mA out of the VFF pin (15). If the VFF voltage is
allowed to reach 2 Vbe over 5V, the L6566A will be latched off. See
Section 5.9: Latched
disable function on page 32
for more details on IC’s behavior under these conditions. If the
impedance externally connected to pin 15 is so low that the 5+2V
BE
threshold cannot be
reached or if some means is provided to prevent that, the device will be able to restart after
the Vcc has dropped below 5V. Refer to the “Application examples and Ideas” section
(
Table 8 on page 45
) for additional hints.
Figure 22. OVP Function: internal block diagram
to triggering
Fault
2-bit
counter
R Q1
S
Monostable
M1
STROBE
OVP
COUT
2 μs
0.5 μs
Monostable
M2
-
+
5 V
ZCD
Counter
reset
FF
40k
5pF
PWM latch
Q
Q
S
R
11
block
L6566A
相關(guān)PDF資料
PDF描述
L6566ATR Multi-mode controller for SMPS with PFC front-end
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L6567 HIGH VOLTAGE DRIVER FOR CFL
L6567D HIGH VOLTAGE DRIVER FOR CFL
相關(guān)代理商/技術(shù)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(kāi)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(kāi)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 功能描述:開(kāi)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(kāi)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(kāi)關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)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
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