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參數(shù)資料
| 型號： | L6566BH |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | ROHS COMPLIANT, SOP-16 |
| 文件頁數(shù)： | 30/48頁 |
| 文件大?。?/td> | 768K |
| 代理商： | L6566BH |
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Application information
L6566BH
36/48
Doc ID 16610 Rev 1
Figure 25.
Brownout protection: internal block diagram and timing diagram
The brownout comparator is provided with current hysteresis in addition to voltage
hysteresis: an internal 15 A current sink is ON as long as the voltage applied on the
AC_OK pin is such that the AC_FAIL signal is high. This approach provides an additional
degree of freedom: it is possible to set the ON threshold and the OFF threshold separately
by properly choosing the resistors of the external divider (see below). With just voltage
hysteresis, instead, fixing one threshold automatically fixes the other one depending on the
built-in hysteresis of the comparator.
With reference to Figure 25, the following relationships can be established for the ON
(VsenON) and OFF (VsenOFF) thresholds of the sensed voltage:
Equation 16
which, solved for RH and RL, yield:
Equation 17
Sensed voltage
Vcc
(pin 5)
VsenON
VsenOFF
GD
(pin 4)
Vout
VAC_OK
(pin 16)
IHYS
15 A
t
AC_FAIL
0.45V
0.485V
-
+
L6566BH
AC_FAIL
AC_OK
Vcc
16
5
0.485V
0.45V
15 A
RH
RL
Sensed
voltage
L
H
OFF
L
6
H
ON
R
45
.
0
R
45
.
0
Vsen
R
485
.
0
10
15
R
485
.
0
Vsen
=
+
=
45
.
0
Vsen
45
.
0
R
;
10
15
Vsen
078
.
1
Vsen
R
OFF
H
L
6
OFF
ON
H
=
=
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| 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 |
| L6566BTR-CUT TAPE | 制造商:ST 功能描述:L6566B Series 23 V 4.6 mA SMPS Multi-Mode Controller Surface Mount - SOIC-16N |
| L6567 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:HIGH VOLTAGE DRIVER FOR CFL |
| L6567D | 制造商:STMicroelectronics 功能描述:CFL DRVR 18V 14SOP - Rail/Tube |
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