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參數(shù)資料
| 型號(hào)： | TPS3513 |
| 英文描述： | 3-Channel Supervisor With Over-Current Detect For Switch-Mode Power Supplies |
| 中文描述： | 3通道監(jiān)控與過(guò)電流偵測(cè)開(kāi)關(guān)模式電源 |
| 文件頁(yè)數(shù)： | 6/14頁(yè) |
| 文件大?。?/td> | 237K |
| 代理商： | TPS3513 |
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TPS3513
PC POWER SUPPLY SUPERVISORS
SLVS313 – FEBRUARY 2001
6
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
power-good and power-good delay (continued)
Furthermore, motherboards should be designed to comply with the above recommended timing. If timings other
than these are implemented or required, this information should be clearly specified.
The TPS3513 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 300-ms
power-good delay.
If the voltage signals at PGI, VS33, and VS5 rise above the undervoltage threshold, the open-drain, power-good
output (PGO) will go high after a delay of 300 ms. When the PGI voltage or any of the 3.3-V, 5-V rail drops below
the undervoltage threshold, PGO will be disabled immediately.
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 will require 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
the 3.3-V, 5-V, –5-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.
When the FPO signal is held high due to an occurring fault condition, the fault status will be latched and the
outputs of the main power rails should not deliver current and should be held at 0 V. Toggling the power-supply
remote on/off (PSON) from low-to-high will reset the fault-protection latch. During this fault condition only the
standby power is not affected.
When PSON goes from high to low or low-to-high, the 38-ms debounce block will be active to avoid that a glitch
on the input will disable/enable the FPO output. During this period, the undervoltage function is disabled to
prevent turnon failure.
Power should be delivered to the rails only if the PSON signal is held at ground potential, thus, FPO is active
low. The FPO pin can be connected to 5 VDC (or up to 15 VDC) through a pullup resistor.
under-voltage protection
The TPS3513 provides undervoltage protection (UVP) for the 12-V rail and undervoltage detect for the 3.3-V
and 5-V rails. When an undervoltage condition appears at the VS12 input pin for more than 150
μ
s, the FPO
output goes high and PGO goes low. Also, this fault condition will be latched until PSON is toggled from
low-to-high or VDD is removed.
In flyback or forward type off-line switching power supplies, usually designed for small power, the overload
protection design is very simple. Most of these type of power supplies are only sensing the input current for an
overload condition. The trigger-point needs to be set much higher than the maximum load in order to prevent
false turnon.
However, this will cause one critical issue. In case that the connected load is larger than the maximum allowable
load but smaller than the trigger-point, the system will always become over-heated and cause failure and
damage.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS3513D | 功能描述:監(jiān)控電路 3Ch Super With Over- Current Detect RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類(lèi)型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| TPS3513DG4 | 功能描述:監(jiān)控電路 3Ch Super With Over- Current Detect RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類(lèi)型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| TPS3513DR | 功能描述:監(jiān)控電路 3Ch Super With Over- Current Detect RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類(lèi)型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| TPS3513DRG4 | 功能描述:監(jiān)控電路 3Ch Super With Over- Current Detect RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類(lèi)型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| TPS3513N | 功能描述:監(jiān)控電路 3-Ch Supervisor RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類(lèi)型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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