- 您现在的位置：买卖IC网 > PDF目录272834 > TPS2046BDR (TEXAS INSTRUMENTS INC) 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 PDF资料下载
参数资料
| 型号： | TPS2046BDR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封装： | GREEN, PLASTIC, MS-012AA, SOIC-8 |
| 文件页数： | 14/29页 |
| 文件大小： | 901K |
| 代理商： | TPS2046BDR |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页当前第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页
www.ti.com
ENABLE (ENx)
OVERCURRENT (OCx)
CURRENT SENSE
THERMAL SENSE
UNDERVOLTAGE LOCKOUT
SLVS532C – JULY 2004 – REVISED OCTOBER 2007
The logic enable disables the power switch and the bias for the charge pump, driver, and other circuitry to reduce
the supply current. The supply current is reduced to less than 1
μA or 2 μA when a logic low is present on ENx.
A logic high input on ENx restores bias to the drive and control circuits and turns the switch on. The enable input
is compatible with both TTL and CMOS logic levels.
The OCx open-drain output is asserted (active low) when an overcurrent or overtemperature condition is
encountered. The output remains asserted until the overcurrent or overtemperature condition is removed. A
10-ms deglitch circuit prevents the OCx signal from oscillation or false triggering. If an overtemperature shutdown
occurs, the OCx is asserted instantaneously.
A sense FET monitors the current supplied to the load. The sense FET measures current more efficiently than
conventional resistance methods. When an overload or short circuit is encountered, the current-sense circuitry
sends a control signal to the driver. The driver in turn reduces the gate voltage and drives the power FET into its
saturation region, which switches the output into a constant-current mode and holds the current constant while
varying the voltage on the load.
The TPS204xB/TPS2055B implements a thermal sensing to monitor the operating temperature of the power
distribution switch. In an overcurrent or short-circuit condition, the junction temperature rises. When the die
temperature rises to approximately 140
°C due to overcurrent conditions, the internal thermal sense circuitry turns
off the switch, thus preventing the device from damage. Hysteresis is built into the thermal sense, and after the
device has cooled approximately 10 degrees, the switch turns back on. The switch continues to cycle off and on
until the fault is removed. The open-drain false reporting output (OCx) is asserted (active low) when an
overtemperature shutdown or overcurrent occurs.
A voltage sense circuit monitors the input voltage. When the input voltage is below approximately 2 V, a control
signal turns off the power switch.
Copyright 2004–2007, Texas Instruments Incorporated
21
相关PDF资料 |
PDF描述 |
|---|---|
| TPS3125G15DBVRG4 | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| TS3L100PWRE4 | QUAD 1-CHANNEL, SGL POLE DOUBLE THROW SWITCH, PDSO16 |
| TC151A2313EOA723 | 0.25 A SWITCHING REGULATOR, 50 kHz SWITCHING FREQ-MAX, PDSO8 |
| TC151A5730EOA713 | 0.25 A SWITCHING REGULATOR, 50 kHz SWITCHING FREQ-MAX, PDSO8 |
| TC151A5544EOA723 | 0.25 A SWITCHING REGULATOR, 50 kHz SWITCHING FREQ-MAX, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS2046BDRG4 | 功能描述:电源开关 IC - USB Current-Limited RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
| TPS2046BEVM-293 | 功能描述:交换机 IC 开发工具 TPS2046BEVM-293 Eval Mod RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:USB Power Switches 工具用于评估:MAX4984E 工作电源电压:2.8 V to 5.5 V |
| TPS2046D | 功能描述:电源开关 IC - USB Dual 1in 2out .7A RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
| TPS2046DG4 | 功能描述:电源开关 IC - USB 0.345A 2.7-5.5V Dual Hi-Side MOSFET RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
| TPS2046DR | 功能描述:电源开关 IC - USB Dual 1in 2out .7A RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
发布紧急采购，3分钟左右您将得到回复。