參數(shù)資料
型號(hào)： TPS51317RGBR
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 穩(wěn)壓器
英文描述： SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, PQCC20
封裝： 4 X 3.50 MM, GREEN, PLASTIC, QFN-20
文件頁(yè)數(shù)： 8/28頁(yè)
文件大?。?/td> 1000K
代理商： TPS51317RGBR
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=
+
P P
OCL dc
OCL valley
1
I
2
SLUSAH9
– MARCH 2011
Overcurrent Protection
Both positive and negative overcurrent protection are provided in the TPS51317:
Overcurrent Limit (OCL)
Negative OCL (level same as positive OCL)
Overcurrent Limit
If the sensed current value is above the OCL setting, the converter delays the next ON pulse until the current
drops below the OCL limit. Current limiting occurs on a pulse-by-pulse basis. The TPS51317 uses a valley
current limiting scheme where the DC OCL trip point is the OCL limit plus half of the inductor ripple current. The
minimum valley OCL is 6 A over process and temperature.
During the overcurrent protection event, the output voltage likely droops until the UVP limit is reached. Then, the
converter de-asserts the PGOOD pin, and then latches OFF after an 8-
s delay. The converter remains in this
state until the device is reset.
(4)
Negative OCL
The negative OCL circuit acts when the converter is sinking current from the output capacitor(s). The converter
continues to act in a valley mode, the absolute value of the negative OCL set point is typically -6.5 A.
Thermal Protection
Thermal Shutdown
The TPS51317 has an internal temperature sensor. When the temperature reaches a nominal 145
°C, the device
shuts down until the temperature cools by approximately 10
°C. Then the converter restarts.
16
Copyright
2011, Texas Instruments Incorporated
Product Folder Link(s): TPS51317
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS51317RGBT 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 3.3V/5Vin,6A,DCAP Mode Sync Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
TPS51362RVER 制造商:Texas Instruments 功能描述:22V INPUT, 10A INTEGRATED FET 制造商:Texas Instruments 功能描述:IC REG BUCK SYNC ADJ 10A 28VQFN
TPS51362RVET 制造商:Texas Instruments 功能描述:22V INPUT, 10A INTEGRATED FET 制造商:Texas Instruments 功能描述:IC REG BUCK SYNC ADJ 10A 28VQFN
TPS51363 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:22-V Input, 8-A or 10-A Converter With Integrated FET
TPS51363RVER 制造商:Texas Instruments 功能描述:Conv DC-DC Single Step Down 3V to 22V 28-Pin VQFN EP T/R 制造商:Texas Instruments 功能描述:IC REG BCK SYNC ADJ 10/8A 28VQFN
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