参数资料
| 型号： | ISL54227IRTZ |
| 厂商： | Intersil |
| 文件页数： | 2/18页 |
| 文件大小： | 0K |
| 描述： | IC USB SWITCH DUAL DPST 10TDFN |
| 标准包装： | 100 |
| 功能： | 开关 |
| 电路： | 2 x SPST |
| 导通状态电阻： | 17 欧姆 |
| 电压电源： | 单电源 |
| 电压 - 电源，单路/双路(±)： | 2.7 V ~ 5.25 V |
| 电流 - 电源： | 45µA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-VFDFN 裸露焊盘 |
| 供应商设备封装： | 10-TDFN-EP（3x3） |
| 包装： | 管件 |
ISL54227
10
FN7593.1
September 5, 2013
VDD power supply to ground. This will result in a significant
amount of current flow in the IC, which can potentially create a
latch-up state or permanently damage the IC. The external VDD
resistor limits the current during this overstress situation and has
been found to prevent latch-up or destructive damage for many
overvoltage transient events.
Under normal operation, the low microamp IDD current of the IC
produces an insignificant voltage drop across the series resistor
resulting in no impact to switch operation or performance.
The ISL54227 has special charger port detection circuitry that
monitors the voltage at the com pins to detect when a battery
charger has been connected into the USB port (see Figure 10).
When the battery charger is connected into the USB connector, it
shorts the COM+ and COM- pins together. The shorting of the pins
is sensed by the ISL54227 IC and it pulls the COM+ and COM-
lines high and as long as the OE = “0” or is tri-stated by the P, it
will drive its INT logic output “Low” to tell the power management
circuitry that a battery charger is connected at the port and not a
USB host transceiver. The power management circuitry will then
use the USB connector VBUS line to charge the battery.
ISL54227 Operation
The following will discuss using the ISL54227 shown in the
POWER
The power supply connected at the VDD pin provides the DC bias
voltage required by the ISL54227 part for proper operation. The
ISL54227 can be operated with a VDD voltage in the range of
2.7V to 5.25V.
For lowest power consumption you should use the lowest VDD
supply.
A 0.01F or 0.1F decoupling capacitor should be connected
from the VDD pin to ground to filter out any power supply noise
from entering the part. The capacitor should be located as close
to the VDD pin as possible.
In a typical application, VDD will be in the range of 2.8V to 4.3V
and will be connected to the battery or LDO of the portable
media device.
LOGIC CONTROL
The state of the ISL54227 device is determined by the voltage at
the OE pin, LP pin, and the signal voltage at the COM pins. Refer
The OE and LP pins are internally pulled low through a 4M
Ω
resistor to ground and can be tri-stated or left floating.
FIGURE 8. VDD SERIES RESISTOR TO LIMIT IDD CURRENT DURING
NEGATIVE OVP AND FOR ENHANCED ESD AND LATCH-
UP IMMUNITY
FIGURE 9. NEGATIVE OVP IDD CURRRENT vs RESISTOR VALUE vs
VSUPPLY
D+
100 TO 1k
COM+
COM-
VSUPPLY
GND
C
PROTECTION
RESISTOR
OVP
LOGIC
D-
IDD
VDD
-5V
FAULT
VOLTAGE
ALM
INT
LOW
TO
INDICATE
OVP
OE
LP
0
5
10
15
20
25
100
200
300
400
500
600
700
800
900
1k
RESISTOR ()
I DD
(m
A)
VCOM+ = VCOM- = -5V
2.7V
3.6V
5.25V
FIGURE 10. CHARGER PORT DETECTION
OE
D+ COM+
COM-
VSUPPLY
GND
C
LOGIC
D-
LP
VDD
ALM
INT
USB
TRANCEIVER
BATTERY
CHARGER
P
200
CHG DET
POWER
BATTERY CHARGER
CIRCUITRY
MANAGEMENT
“LOW” TO
INDICATE
CHARGER
CONNECTED
OE = “0”
OR
TRI-STATE
VBUS
GND
D+
D-
US
B
C
O
NN
EC
T
O
R
相关PDF资料 |
PDF描述 |
|---|---|
| ISL54228IRUZ-T | IC USB SWITCH DPST OVP 8TQFN |
| ISL54230IRTZ | IC SWITCH QUAD DPDT 32TQFN |
| ISL54233IRUZ-T | IC INTERFACE |
| ISL54302IRZ | IC SWITCH QUAD SPST 20QFN |
| ISL54402IRZ | IC SWITCH USB/AUDIO 10-TDFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL54227IRTZEVAL1Z | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:High-Speed USB 2.0 (480Mbps) DPST Switch with Overvoltage Protection (OVP) and Dedicated Charger Port Detection |
| ISL54227IRTZ-T | 功能描述:IC USB SWITCH DUAL DPST 10TDFN RoHS:是 类别:集成电路 (IC) >> 接口 - 模拟开关，多路复用器，多路分解器 系列:- 其它有关文件:STG4159 View All Specifications 标准包装:5,000 系列:- 功能:开关 电路:1 x SPDT 导通状态电阻:300 毫欧 电压电源:双电源 电压 - 电源，单路/双路(±):±1.65 V ~ 4.8 V 电流 - 电源:50nA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:7-WFBGA，FCBGA 供应商设备封装:7-覆晶 包装:带卷 (TR) |
| ISL54227IRUZ-T | 功能描述:IC USB SWITCH DUAL DPST 10TQFN RoHS:是 类别:集成电路 (IC) >> 接口 - 模拟开关，多路复用器，多路分解器 系列:- 其它有关文件:STG4159 View All Specifications 标准包装:5,000 系列:- 功能:开关 电路:1 x SPDT 导通状态电阻:300 毫欧 电压电源:双电源 电压 - 电源，单路/双路(±):±1.65 V ~ 4.8 V 电流 - 电源:50nA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:7-WFBGA，FCBGA 供应商设备封装:7-覆晶 包装:带卷 (TR) |
| ISL54227IRUZ-T7A | 功能描述:IC USB SWITCH DUAL DPST 10TQFN RoHS:是 类别:集成电路 (IC) >> 接口 - 模拟开关，多路复用器，多路分解器 系列:- 应用说明:Ultrasound Imaging Systems Application Note 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:250 系列:- 功能:开关 电路:单刀单掷 导通状态电阻:48 欧姆 电压电源:单电源 电压 - 电源，单路/双路(±):2.7 V ~ 5.5 V 电流 - 电源:5µA 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:48-LQFP 供应商设备封装:48-LQFP（7x7） 包装:托盘 |
| ISL54228 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:High-Speed USB 2.0 (480Mbps) DPST Switch with Overvoltage Protection (OVP) |
发布紧急采购，3分钟左右您将得到回复。