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參數資料
型號: TPS65930BZCHR
廠商: TEXAS INSTRUMENTS INC
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PBGA139
封裝: 10 X 10 MM, 0.65 MM PITCH, GREEN, PLASTIC, NFBGA-139
文件頁數: 55/115頁
文件大小: 1232K
代理商: TPS65930BZCHR
SWCS037G
– MAY 2008 – REVISED APRIL 2011
4.1.10 USB LDO Short-Circuit Protection Scheme
The short-circuit current for the LDOs and dc-dcs in the TPS65920 and TPS65930 devices is
approximately twice the maximum load current. When the output of the block is shorted to ground, the
power dissipation can exceed the 1.2-W requirement if no action is taken. A short-circuit protection
scheme is included in the TPS65920 and TPS65930 devices to ensure that if the output of an LDO or
dc-dc is short-circuited, the power dissipation does not exceed the 1.2-W level.
The three USB LDOs, VRUSB3V1, VRUSB1V8, and VRUSB1V5, are included in this short-circuit
protection scheme, which monitors the LDO output voltage at a frequency of 1 Hz and generates an
interrupt (sc_it) when a short-circuit is detected.
The scheme compares the LDO output voltage to a reference voltage and detects a short-circuit if the
LDO voltage drops below this reference value (0.5 or 0.75 V programmable). In the case of the
VRUSB3V1 and VRUSB1V8 LDOs, the reference is compared with a divided down voltage (1.5 V typical).
If a short-circuit is detected on VRUSB3V1, the power subchip FSM switches this LDO to sleep mode.
If a short-circuit is detected on VRUSB1V8 or VRUSB1V5, the power subchip FSM switches off the
relevant LDO.
44
Power Module
Copyright
2008–2011, Texas Instruments Incorporated
focus.ti.com: TPS65930/TPS65920
相關PDF資料
PDF描述
TPS65930BZCH SPECIALTY CONSUMER CIRCUIT, PBGA139
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TPS65950A2ZXN 功能描述:PMIC 解決方案 Integ Pwr Mgmt IC RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
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TPS65950A3ZXN 功能描述:PMIC 解決方案 Integrated Pwr Mgmt IC RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
TPS65950A3ZXNR 功能描述:PMIC 解決方案 Integrated Pwr Mgmt IC RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
TPS65950BZXN 功能描述:開關變換器、穩壓器與控制器 Integ Pwr Mgmt IC RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
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