- 您现在的位置：买卖IC网 > PDF目录5541 > LTC4366HTS8-2#TRPBF (Linear Technology)IC SURGE STOPPER HV TSOT-23-8 PDF资料下载
参数资料
| 型号： | LTC4366HTS8-2#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 15/24页 |
| 文件大小： | 0K |
| 描述： | IC SURGE STOPPER HV TSOT-23-8 |
| 标准包装： | 2,500 |
| 电压 - 工作： | 9V |
| 电压 - 箝位： | 可调式 |
| 技术： | 混合技术 |
| 电路数： | 1 |
| 应用： | 自动 |
| 封装/外壳： | SOT-23-8 薄型，TSOT-23-8 |
| 供应商设备封装： | TSOT-23-8 |
| 包装： | 带卷 (TR) |
LTC4366-1/LTC4366-2
APPLICATIONS INFORMATION
R SS = R IN ?
I INRUSH =
? I G
R IN ? ( V REG – 7V )
V IN(MAX) – 12V – ( V REG – 7V )
R IN ? ( V REG – 7V )
V IN(MAX) – 5V – V REG
–C G ? ( R SS + R IN ) ( V REG – V SS(MATCH ) )
C1 (MAX ) =
2 ? V UVLO1
V REG – V SS(MATCH ) ? ?
hasexceededV REG .SincetheOUTpinvoltageisatleast
2.55V larger than V SS it exceeds the specified maximum.
Choosing the match point (with supply at the maximum)
sufficiently below V REG (by at least 2.55V), allows C1 to
charge up in time to protect the load from overvoltage.
In reality having V SS pin voltage 7V below V REG provides
required margin for charging C1.
V SS(MATCH)(MAX) = V REG – 7V
Increasing R SS increases the match point, so determin-
ing the maximum R SS value while still protecting from
overvoltage is useful. Using I RIN = I RSS :
V RSS
V RIN
Using:
V RSS = V SS(MATCH)(MAX) = V REG – 7V
V RIN = V IN – V Z(VDD) – V RSS
Substituting:
R SS(MAX) =
R SS(MAX) =
If we guarantee that R SS < R SS(MAX) then the following
is true:
V SS(MATCH) < V SS(MATCH)(MAX)
C1 bypasses the charge pump, and requires at least a
0.22μF. The size of C1 needs limits also. The gate capaci-
tor (C G ) dictates the maximum output capacitor C1 (MAX)
that will charge to the 2.55V UVLO1 threshold (V UVLO1 )
before the OUT voltage exceeds the overvoltage threshold.
? ?
I G ? R SS ? R IN ? In ? 1 – ?
? ?
In most cases:
C1 (MAX) = 10 ? C G to 100 ? C G
GATE Capacitor, C G
The gate capacitor is used for three functions. First, C G
absorbs charge from the gate-to-drain capacitance of
the MOSFET during overvoltage transients. Second, the
capacitor also acts as a compensation element for the
overvoltage regulation amplifier. The minimum value for
C G to guarantee stability is 2nF. Finally, C G sets the slew
rate of the GATE and OUT pins. The voltage at the GATE pin
rises at a slope equal to 20μA/C G . This slope determines
the charging current into the load capacitor.
C LOAD
C G
The voltage rating for C G must be greater than the regula-
tion voltage (V REG ).
MOSFET Selection
The LTC4366 drives an N-channel MOSFET to conduct
the load current. The important features of the MOSFET
are on-resistance, R DS(ON) , the maximum drain-source
voltage, V (BR)DSS , the threshold voltage, and the SOA.
The maximum allowable drain-source voltage must be
higher than the supply voltage. If the output is shorted
to ground or during an overvoltage event, the full supply
voltage will appear across the MOSFET.
The threshold voltage of the MOSFET is used in the mini-
mum supply start-up calculation. For applications with
supplies less than 12V, a logic-level MOSFET is required.
Above 12V a standard threshold N-channel MOSFET is
sufficient.
The SOA of the MOSFET must encompass all fault condi-
tions. In normal operation the pass transistor is fully on,
dissipating very little power. But during overvoltage faults,
the GATE pin is servoed to regulate the output voltage
through the MOSFET. Large current and high voltage drop
across the MOSFET can coexist in these cases. The SOA
curves of the MOSFET must be considered carefully along
with the selection of the fault timer capacitor.
15
For more information www.linear.com/LTC4366
436612fd
相关PDF资料 |
PDF描述 |
|---|---|
| RCWL0805R240JMEA | RES .24 OHM 1/8W 5% 0805 SMD |
| LTC4366HTS8-1#TRPBF | IC SURGE STOPPER HV TSOT-23-8 |
| 1.5KE30HE3/54 | TVS UNIDIR 1.5KW 30V 10% 1.5KE |
| ICL7621DCSA+T | IC OPAMP DUAL LP CMOS 8-SOIC |
| SF-0402S400-2 | FUSE 4A 24VDC 0402 SLOW |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4366IDDB-1#PBF | 制造商:Linear Technology 功能描述:IC SURGE STOPPER 500 V DFN-8 制造商:Linear Technology 功能描述:IC, SURGE STOPPER, 500 V, DFN-8 制造商:Linear Technology 功能描述:IC, SURGE STOPPER, 500 V, DFN-8; Controller Applications:Automotive, Industrial Automation, Laptops, Portable Instrumentation; Internal Switch:Yes; Supply Voltage Min:4.5V; Supply Voltage Max:12V; Digital IC Case Style:DFN ;RoHS Compliant: Yes |
| LTC4366IDDB-1#TRMPBF | 功能描述:IC SURGE STOPPER HV 8-DFN RoHS:是 类别:过电压，电流，温度装置 >> 电涌抑制 IC 系列:- 产品培训模块:LT4356 Surge Stopper 产品目录绘图:LT4356 Output Graph LT4356 Series 10-MSOP 标准包装:2,500 系列:- 电压 - 工作:4 ~ 80V 电压 - 箝位:27V，可调 技术:混合技术 功率（瓦特）:- 电路数:1 应用:自动 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:带卷 (TR) 配用:DC1018B-C-ND - DEMO BOARD FOR LT4356-3DC1018B-B-ND - DEMO BOARD FOR LT4356-2DC1018B-A-ND - DEMO BOARD FOR LT4356-1 |
| LTC4366IDDB-1#TRPBF | 功能描述:IC SURGE STOPPER HV 8-DFN RoHS:是 类别:过电压，电流，温度装置 >> 电涌抑制 IC 系列:- 产品培训模块:LT4356 Surge Stopper 产品目录绘图:LT4356 Output Graph LT4356 Series 10-MSOP 标准包装:2,500 系列:- 电压 - 工作:4 ~ 80V 电压 - 箝位:27V，可调 技术:混合技术 功率（瓦特）:- 电路数:1 应用:自动 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:带卷 (TR) 配用:DC1018B-C-ND - DEMO BOARD FOR LT4356-3DC1018B-B-ND - DEMO BOARD FOR LT4356-2DC1018B-A-ND - DEMO BOARD FOR LT4356-1 |
| LTC4366IDDB-2#PBF | 制造商:Linear Technology 功能描述:IC SURGE STOPPER 500 V DFN-8 制造商:Linear Technology 功能描述:IC, SURGE STOPPER, 500 V, DFN-8 制造商:Linear Technology 功能描述:IC, SURGE STOPPER, 500 V, DFN-8; Controller Applications:Automotive, Industrial Automation, Laptops, Portable Instrumentation; Internal Switch:Yes; Supply Voltage Min:4.5V; Supply Voltage Max:12V; Digital IC Case Style:DFN ;RoHS Compliant: Yes |
| LTC4366IDDB-2#TRMPBF | 功能描述:IC SURGE STOPPER HV 8-DFN RoHS:是 类别:过电压，电流，温度装置 >> 电涌抑制 IC 系列:- 产品培训模块:LT4356 Surge Stopper 产品目录绘图:LT4356 Output Graph LT4356 Series 10-MSOP 标准包装:2,500 系列:- 电压 - 工作:4 ~ 80V 电压 - 箝位:27V，可调 技术:混合技术 功率（瓦特）:- 电路数:1 应用:自动 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:带卷 (TR) 配用:DC1018B-C-ND - DEMO BOARD FOR LT4356-3DC1018B-B-ND - DEMO BOARD FOR LT4356-2DC1018B-A-ND - DEMO BOARD FOR LT4356-1 |
发布紧急采购，3分钟左右您将得到回复。