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参数资料
| 型号： | TPS3511DR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 3-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封装： | GREEN, PLASTIC, MS-012AA, SOIC-8 |
| 文件页数： | 14/18页 |
| 文件大小： | 528K |
| 代理商： | TPS3511DR |
TPS3510,TPS3511
PC POWER SUPPLY SUPERVISORS
SLVS312A – JULY 2000 – REVISED DECEMBER 2002
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
detailed description
power good and power good delay
A PC power supply is commonly designed to provide a power-good signal, which is defined by the computer
manufacturers. PGO is a power-good signal and should be asserted high by the PC power supply to indicate
that the 5-V and 3.3-V outputs are above the under-voltage threshold limit. At this time the converter should be
able to provide enough power to ensure continuous operation within the specification. Conversely, when either
the 5-V or the 3.3-V output voltages fall below the under-voltage threshold, or when ac power has been removed
for a time sufficiently long so that power supply operation is no longer ensured, PGO should be de-asserted to
a low state.
Figure 1 represents the timing characteristics of the power good (PGO), dc enable (PSON), and the 5 V/3.3 V
supply rails.
t2
t3
t5
t4
5-V/3.3-V
Output
PSON
PGO
On
Off
75%
10%
Figure 1. Timing of PSON and PGO
Although there is no requirement to meet specific timing parameters, the following signal timings are
recommended:
2 ms
≤ t2 ≤ 20 ms, 100 ms < t3 < 2000 ms, t4 > 1 ms, t5 ≤ 10 ms
Furthermore motherboards should be designed to comply with the previously recommended timing. If timings
other than these are implemented or required, this information should be clearly specified.
The TPS3510/1 family of power-supply supervisors provides a power-good output (PGO) for the 3.3-V and 5-V
supply voltage rails and a separate power-good input (PGI). An internal timer is used to generate a power-good
delay. If the voltage signals at PGI, VS33, and VS5 rise above the under-voltage threshold, the open-drain
power-good output (PGO) goes high after a delay of 150 ms or 300 ms. When the PGI voltage or either the 3.3-V
and 5-V power rails drops below the under-voltage threshold, PGO is disabled immediately (after 150-
s
debounce).
power supply remote on/off (PSON) and fault protect output (FPO)
Since the latest personal computer generation focuses on easy turnon and power saving functions, the PC
power supply requires two characteristics. One is a dc power supply remote on/off function, the other is standby
voltage to achieve very low power consumption of the PC system. Thus the main power needs to be shut down.
The power supply remote on/off (PSON) is an active low signal that turns on all of the main power rails including
3.3 V, 5 V, –5 V, 12 V, and –12 V power rails. When this signal is held high by the PC motherboard or left open
circuited, the signal of the fault protect output (FPO) also goes high. Thus, the main power rails should not deliver
current and should be held at 0 V.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS3511DRG4 | 功能描述:监控电路 PC Pwr Supply Sup RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| TPS3511P | 功能描述:监控电路 PC Pwr Supply Sup RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| TPS3511PE4 | 功能描述:监控电路 PC Pwr Supply Sup RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| TPS3513 | 制造商:TI 制造商全称:Texas Instruments 功能描述:PC POWER SUPPLY SUPERVISORS |
| TPS3513D | 功能描述:监控电路 3Ch Super With Over- Current Detect RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
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