- 您现在的位置：买卖IC网 > Datasheet目录38 > FAN6921MLMY (Fairchild Semiconductor)IC CTLR PFC/FLYBACK 16-SOICN Datasheet资料下载
参数资料
| 型号： | FAN6921MLMY |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 21/23页 |
| 文件大小： | 1764K |
| 描述： | IC CTLR PFC/FLYBACK 16-SOICN |
| 标准包装： | 2,500 |
| 模式： | 临界传导（CRM） |
| 电流 - 启动： | 10µA |
| 电源电压： | 8.5 V ~ 25 V |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SOIC N |
| 包装： | 带卷 (TR) |
?2010 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN6921ML " Rev. 1.0.3
21
Open-Loop, Short-Circuit, and Overload Protection
(FB Pin)
Referring to Figure 45, outside of FAN6921ML; the FB
pin is connected to the collector of transistor of an opto-
coupler. Inside of FAN6921ML, the FB pin is connected
to an internal voltage bias through a resistor of ~5 kW.
As the output loading is increased, the output voltage is
decreased and the sink current of transistor of opto-
coupler on primary side is reduced. So the FB pin
voltage is increased by internal voltage bias. In the case
of an open loop, output short circuit, or overload
conditions; this sink current is further reduced and the
FB pin voltage is pulled to high level by internal bias
voltage. When the FB pin voltage is higher than 4.2 V
for 50ms, the FB pin protection is activated.
FB
V
O
Open-loop
Short-circuit / overload
Figure 45. FB Pin Open-Loop, Short Circuit,
and Overload Protections
Under-Voltage Lockout (UVLO, VDD Pin)
Referring to Figure 36 and Figure 37, the turn-on and
turn-off V
DD
threshold voltages are fixed at 18 V and
10 V, respectively. During startup, the hold-up capacitor
(V
DD
capacitor) is charged by the HV startup current
until V
DD
voltage reaches the turn-on voltage. Before the
output voltage rises to rated voltage and delivers energy
to the V
DD
capacitor from auxiliary winding, this hold-up
capacitor has to sustain the V
DD
voltage energy for
operation. When V
DD
voltage reaches turn-on voltage,
FAN6921ML starts all switching operation if no
protection is triggered before V
DD
voltage drops to turn-
off voltage V
DD-PWM-OFF
.
相关PDF资料 |
PDF描述 |
|---|---|
| FAN6921MRMY | IC CTLR PFC/FLYBACK 16-SOICN |
| FAN6961SZ | IC PFC CONTROLLER DCM 8SOP |
| FAN6982MY | IC CTLR PFC CCM 14-SOICN |
| FAN7527BN | IC PFC CTRLR TRANSITION 8DIP |
| FAN7529MX | IC PFC CTRLR CRM/TRANSITION 8SOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| FAN6921MR | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Integrated Critical-Mode PFC / Quasi-Resonant Current-Mode PWM Controller |
| FAN6921MRMY | 功能描述:电流型 PWM 控制器 Crtcl Md PFC & Quasi Res Cur Md PWM Cntlr 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 |
| FAN6961 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Interleaved Dual BCM PFC Controllers |
| FAN6961BMY | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| FAN6961DY | 功能描述:功率因数校正 IC Green mode PFC Fwd PWM Controller RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。