收藏本站
TPS2346
 
SLUS529  MAY 2002
9
www.ti.com
detailed description
The primary circuit blocks of the TPS2346 include internal supply generation, a charge pump, a state machine,
programmable ramp generator, precharge circuitry, and a ROM data cell. In addition, each of the four channels
contains a gate control block which includes the linear control amplifier (LCA), programmable current source,
and the voltage sense circuitry (see Figure 1). The gate drive blocks are virtually identical, except that the
Channel 4 block, controlling the negative voltage channel, adds some scaling and level shift circuitry to adjust
the polarity of the sense signals to that of the internal circuitry.
+
1V
+
2.5V
SUPPLY
SECTION
CHARGE
PUMP
CPOK
UVLO
VIN1
UVOV1
LEVEL[15:0]
IRAMP
VIN2
STATE
MACHINE
UVOV[4:1]
100 礢
ROM
DATA
PRE
CHARGE
+
V
IMAX3
LCA/
VSNS3
V
IMAX4
LS
+
LCA/
VSNS4
V
IMAX2
+
LCA/
VSNS2
V
IMAX1
+
LCA/
VSNS1
EN1
EN2
EN3
EN4
/FLT
OC[4:1]
UVLO
CPOK
EN
ORD[8:0]
FS
VS1
OC1
UVOV3
OC3
UVOV2
OC2
UVOV4
OC4
VIN2
VA
VA
EN1
EN2
EN3
EN4
VIN1
VIN3
VIN4
3
12
11
14
8
16
13
15
5
22
23
24
21
20
2
4
1
6
17
10
VS2
VS4
VS3
GATE1
CS1
CS2
CS4
CS3
GATE2
GATE4
GATE3
19
7
18
/CHG
RGND
AGND
PRECHG
CPGND
CPUMP
+
DAC
RAMP
GENERATOR
3
UP
CH_SEL[4:1]
9
MUX
ENABLE
PG
Figure 1. TPS2346 block diagram
The supply generation block contains voltage regulators and references to generate the various bias voltages
used internally by the TPS2346. An undervoltage lockout (UVLO) function is used to ensure proper device
turn-on once the VIN1 input has attained the UVLO threshold of about 2.5 V. In addition, an on-chip charge pump
steps up the VIN1 input to generate the high voltage used by the LCAs to drive the pass MOSFET gates. Burst
regulation of the charge pump limits the output to about 20.5 V (peak), with about a 1-V hysteresis. During
steady-state load operation, sufficient gate overdrive is ensured to fully enhance the external MOSFETs, while
not exceeding the typical 20-V V
GS
 rating of common N-channel MOSFETs.
The state machine block contains the logic to control the ramp-up and ramp-down sequencing, ramp generator
operation, and fault management. It uses voltage and current monitor outputs, along with the device enable
status and programmed order information to determine which channel is to be acted on, whether ramp-up,
ramp-down or steady-state operation is required, and the present healthy or faulted states of the back-end
supplies. A nominal 100礢 digital filter is applied to the ENABLE
 input to help protect against false triggering
in systems not implementing hardware connection control. The filter acts on both high-to-low and low-to-high
transitions of the enable input.
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
TPS24711DGSR IC CTRLR HOT SWAP 2.5-18V 10MSOP
TPS2491DGSG4 IC POS HV HOT-SWAP CTRLR 10-MSOP
W83772G IC H/W MONITOR 8-TSSOP
W83L786G IC H/W MONITOR 28-SSOP
X96011V14IZ IC SENSOR TEMP BIAS SGL 14-TSSOP
XR4151CP-F IC CONV VF/FV 8PDIP
XRP7714ILB-0X14-F IC REG 5OUT BCK/LINEAR 40TQFN
XRP7740ILB-0X18-F IC REG 5OUT BCK/LINEAR 40TQFN
相关代理商/技术参数
TPS2350D 功能描述:热插拔功率分布 Pwr Mngr for Redund -48V Supplies 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
TPS2350DG4 功能描述:热插拔功率分布 Pwr Mngr for Redund -48V Supplies 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
TPS2350DR 功能描述:热插拔功率分布 Pwr Mngr for Redund -48V Supplies 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
TPS2350DRG4 功能描述:热插拔功率分布 Pwr Mngr for Redund -48V Supplies 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
TPS2350EVM 功能描述:电源管理IC开发工具 Telecom -48V OR-ing Diode RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V
TPS2350PW 功能描述:热插拔功率分布 Pwr Mngr for Redund -48V Supplies 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
TPS2350PW 制造商:Texas Instruments 功能描述:HOT SWAP CONTROLLER ((NW)) 制造商:Texas Instruments 功能描述:IC, HOT SWAP POWER MANAGER, 14-TSSOP
TPS2350PWG4 功能描述:热插拔功率分布 Pwr Mngr for Redund -48V Supplies 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