- 您现在的位置：买卖IC网 > PDF目录43900 > L6566BH (STMICROELECTRONICS) SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, PDSO16 PDF资料下载
参数资料
| 型号： | L6566BH |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | ROHS COMPLIANT, SOP-16 |
| 文件页数： | 28/48页 |
| 文件大小： | 768K |
| 代理商： | L6566BH |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页当前第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页
Application information
L6566BH
34/48
Doc ID 16610 Rev 1
Figure 23.
OVP function: timing diagram
The value of RZ1 will be such that the current sourced by the ZCD pin be within the rated
capability of the internal clamp:
Equation 14
where Vinmax is the maximum dc input voltage and Ns the turn number of the primary
for additional details.
To reduce sensitivity to noise and prevent the latch from being erroneously activated, first
the OVP comparator is active only for a small time window (typically, 0.5 s) starting 2 s
after MOSFET’s turn-off, to reject the voltage spike associated to the positive-going edges
of the voltage across the auxiliary winding Vaux; second, to stop the L6566BH the OVP
comparator must be triggered for four consecutive switching cycles. A counter, which is
reset every time the OVP comparator is not triggered in one switching cycle, is provided to
this purpose.
shows the internal block diagram, while the timing diagrams in
illustrate the operation.
Note:
To use the OVP function effectively, i.e. to ensure that the OVP comparator will be always
interrogated during MOSFET’s OFF-time, the duty cycle D under open-loop conditions must
fulfill the following inequality:
t
GD
(pin 4)
Vaux
5V
t
STROBE
t
COUNTER
RESET
t
COUNTER
STATUS
t
0
ZCD
(pin 11)
2 s
0.5s
OVP
FAULT
00
0
0 →11 →22 →00 →11 →22 →33 →4
0
NORMAL OPERATION
TEMPORARY DISTURBANCE
FEEDBACK LOOP FAILURE
t
COUT
t
max
3
1
Z
Vin
Np
Naux
10
3
1
R
≥
相关PDF资料 |
PDF描述 |
|---|---|
| L6585D | 0.6 A POWER FACTOR AND FLUORESCENT LIGHT CONTROLLER, 250 kHz SWITCHING FREQ-MAX, PDSO20 |
| L6585DTR | 0.6 A POWER FACTOR AND FLUORESCENT LIGHT CONTROLLER, 250 kHz SWITCHING FREQ-MAX, PDSO20 |
| L6590AN | 0.7 A SWITCHING REGULATOR, 74 kHz SWITCHING FREQ-MAX, PDIP8 |
| L6590D013TR | 0.7 A SWITCHING REGULATOR, 74 kHz SWITCHING FREQ-MAX, PDSO16 |
| L6590D | 0.7 A SWITCHING REGULATOR, 74 kHz SWITCHING FREQ-MAX, PDSO16 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| L6566BHTR | 功能描述:电流型 PWM 控制器 MULTIMODE CONTROLLER SMPS 8V 3 mA RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| L6566BTR | 功能描述:电流型 PWM 控制器 MultiMode Controller for SMPS RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体: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 制造商全称: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 |
发布紧急采购，3分钟左右您将得到回复。