参数资料
| 型号： | AP1212LSL-U |
| 厂商： | Diodes Inc |
| 文件页数： | 10/12页 |
| 文件大小： | 0K |
| 描述： | IC PWR SWITCH USB HISIDE 8-SOIC |
| 标准包装： | 100 |
| 类型： | USB 开关 |
| 输出数： | 2 |
| Rds（开）： | 140 毫欧 |
| 内部开关： | 是 |
| 电流限制： | 1A |
| 输入电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOP |
| 包装： | 管件 |
AP1212
DUAL USB HIGH-SIDE POWER SWITCH
Functional Description
Error Flag
An open-drained output of N-channel MOSFET, the FLG output
is pulled low to signal the following fault conditions: input under
voltage, output current limit, and thermal shutdown.
Current Limit
The current limit threshold is preset internally. It protects the
output MOSFET switches from damage due to undesirable short
circuit conditions or excess inrush current often encountered
during hot plug-in. The low limit of the current limit threshold of
the AP1212 allows a minimum current of 0.5A through the
MOSFET switches. A current limit condition will signal the error
flag.
Supply Filtering
A 0.1μF to 1μF bypass capacitor from IN to GND, located near
the device, is strongly recommended to control supply transients.
Without a bypass capacitor, an output short may cause sufficient
ringing on the input (from supply lead inductance) to damage
internal control circuitry.
Transient Droop Requirements
USB applications support dynamic attachment (hot plug-in) of
peripherals. A current surge is caused by the input capacitance of
downstream device. Ferrite beads are recommended in series
with all power and ground connector pins. Ferrite beads reduce
EMI and limit the inrush current during hot-attachment by filtering
high-frequency signals.
Thermal Shutdown
When the chip temperature exceeds 140oC for any reason other
than over current fault of either one of the two MOSFET switches,
the thermal shutdown function turns off both MOSFET switches
and signals the error flag. A hysteresis of 10oC prevents the
MOSFETs from turning back on until the chip temperature drops
to below 130oC.
Enable
Before EN is asserted, a delay of 10ms minimum from when the
supply voltage, Vcc, becomes stable must be allowed.
Short Circuit Transient
Bulk capacitance provides the short-term transient current
needed during a hot-attachment event. With a 33μF,
16V tantalum or 100μF, 10V electrolytic capacitor mounted close
to downstream connector per port should provide transient drop
protection.
Printed Circuit Layout
The power circuitry of USB printed circuit boards requires a
customized layout to maximize thermal dissipation and to
minimize voltage drop and EMI.
AP1212 Rev. 8
DS31019
10 of 12
NOVEMBER 2010
? Diodes Incorporated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AP1212XS | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:DUAL USB HIGH-SIDE POWER SWITCH |
| AP12-1388-2 | 制造商:Sensata Technologies 功能描述:AP12-1388-2 /Pole # 2 /Prod Family: 0202 |
| AP12-1-40-202 | 制造商:Sensata Technologies 功能描述:2 Pole |
| AP12-1-41-102 | 制造商:Sensata Technologies 功能描述:Circuit Breaker Magnetic Circuit Protectors 2Pole 1A 240VAC |
| AP12-1-41-1251 | 制造商:Sensata Technologies 功能描述:AP12-1-41-1251 /Pole # 2 /Prod Family: 0202 |
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