参数资料
| 型号： | BD4154FV-E2 |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 7/18页 |
| 文件大小： | 0K |
| 描述： | IC POWER SWITCH SSOP-B20 |
| 标准包装： | 2,500 |
| 应用： | PCMCIA，ExpressCard? |
| 电流 - 电源： | 250µA |
| 电源电压： | 3 V ~ 3.6 V |
| 工作温度： | -40°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 20-SSOP-B |
| 包装： | 带卷 (TR) |
BD4154FV
Technical Note
● Description of block operation
EN
With an input of 2.0 volts or higher, this terminal goes HIGH to activate the circuit, and goes LOW to deactivate the circuit
(with the standby circuit current of 40 μ A), It discharges each output and lowers output voltage when the input falls to 0.8
volts or less.
V3_IN, V15_IN, and V3AUX_IN
These are the input terminals for each channel of a 3ch switch. V3 _ IN and V15 _ IN terminals have two pins each, which
should be short-circuited on the pc board with a thick conductor.
A large current runs through these three terminals :
(V3 _ IN: 1.35A; V3AUX _ IN: 0.275 A; and V15 _ IN: 0.625 A). In order to lower the output impedance of the connected power
supply, it is recommended that ceramic capacitors (with B-type characteristics or better) be provided between these
terminals and the ground. Specifically, the capacitors should be on the order of 1 μ F between V3 _ IN and GND, and between
V15 _ IN and GND; and on the order of 0.1 μ F between V3AUX _ IN and GND.
V3, V15, and V3AUX
These are the output terminals for each switch. The V3 and V15 terminals have two pins each, which should be
short-circuited on the PC board and connected to an ExpressCard connector with a thick conductor, as short as possible.
In order to stabilize the output, it is recommended that ceramic capacitors (with B-type characteristics or better) be provided
between these terminals and the ground. Specifically, the capacitors should be on the order of 10 μ F between V3 and GND,
and between V15 and GND; and on the order of 1 μ F between V3AUX and GND.
CPPE#
This pin is used to find whether or not a PCI-Express signal compatible card is present. Turns to “High” level with an input
of 2.0 volts or higher, which means that no card is provided, while it turns to “Low” level when the input is lowered to 0.8 volts
or less, which means that a card is provided. Controls the ON/OFF, switch selecting the proper mode based on the status
of the system.
Pull up resistance (100k Ω～ 200k Ω ) is built into, so the number of components is reduced.
CPUSB#
This pin is used to find whether or not a USB2.0 signal compatible card is present. Turns to “High” level with an input of 2.0
volts or higher, which means that no card is provided, while it turns to “Low” level when the input is lowered to 0.8 volts or
less, which means that a card is provided.
Controls the ON/OFF switch, selecting the proper mode based on the system
status.
Pull up resistance (100k Ω～ 200k Ω ) is built into, so the number of components is reduced.
SYSR
This pin is used to detect the system status.
Turns to “High” level with an input of 2.0 volts or higher, which means that the
system is activated, while it turns to “Low” level when the input is lowered to 0.8 volts or less, which means that the system is
on standby.
PERST_IN#
This pin is used to control the reset signal (PERST#) to a card from the system side. (Also referred to as “SysReset#” by
PCMCIA.) Turns to “High” level with an input of 2.0 volts or higher, and sets PERST# to “High” AND with a “Power Good”
output. Turns to “Low” level and sets PERST# to “Low” when the input falls to 0.8 volts or less.
PERST#
This pin is used to send a reset signal to a PCI-Express compatible card. Reset status is determined by the outputs,
PERST_IN#, CPPE# system status, and EN on/off status. Turns to “High” level and activates the PCI-Express compatible
card only if each output is within the “Power Good” threshold, with the card inserted and PERST_IN# turned to “High” level.
RCLKEN
This pin is used to send an enable signal to the reference clock. Activation status is determined by the outputs, CPPE#
system status, and EN on/off status. Turns to “High” level and activates the reference clock PLL only if each output is within
the “Power Good” threshold, with the card kept inserted.
TEST
This pin is used to test, which should be short-circuited to the GND. When it is short-circuited to V3AUX_IN, UVLO (V3_IN,
V15_IN) turns OFF.
www.rohm.com
? 2010 ROHM Co., Ltd. All rights reserved.
7/15
2010.04 - Rev.B
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相关代理商/技术参数 |
参数描述 |
|---|---|
| BD4155FV | 制造商:ROHM 制造商全称:Rohm 功能描述:Power Switch IC for ExpressCard |
| BD4155FV_09 | 制造商:ROHM 制造商全称:Rohm 功能描述:Power Switch IC for ExpressCardTM |
| BD4155FV_10 | 制造商:ROHM 制造商全称:Rohm 功能描述:Power Switch IC for ExpressCard |
| BD4155FV-E2 | 功能描述:热插拔功率分布 POWER SWITCH IC EXPRESSCARD RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| BD4156MUV | 制造商:ROHM 制造商全称:Rohm 功能描述:Power Switch for ExpressCardTM |
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