ZHCS760H February 2012 – June 2018 TLV62130 , TLV62130A
PRODUCTION DATA.
- 1 特性
- 2 應(yīng)用
- 3 說(shuō)明
- 4 修訂歷史記錄
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
- 8 Detailed Description
-
9 Application and Implementation
- 9.1 Application Information
- 9.2 Typical Application
- 9.3 System Examples
- 10Power Supply Recommendations
- 11Layout
- 12器件和文檔支持
- 13機(jī)械、封裝和可訂購(gòu)信息
封裝選項(xiàng)
機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RGT|16
散熱焊盤(pán)機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RGT|16
訂購(gòu)信息
8.4.4 Current Limit and Short Circuit Protection
The TLV62130 device is protected against heavy load and short circuit events. If a short circuit is detected (VOUT drops below 0.5 V), the current limit is reduced to 1.6 A typically. If the output voltage rises above 0.5 V, the device runs in normal operation again. At heavy loads, the current limit determines the maximum output current. If the current limit is reached, the high-side FET is turned off. Avoiding shoot through current, then the low-side FET switches on to allow the inductor current to decrease. The low-side current limit is typically 3.5 A. The high-side FET turns on again only if the current in the low-side FET has decreased below the low side current limit threshold.
The output current of the device is limited by the current limit (see Electrical Characteristics). Due to internal propagation delay, the actual current can exceed the static current limit during that time. The dynamic current limit can be calculated as follows:
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where
- ILIMF is the static current limit, specified in the Electrical Characteristics.
- L is the inductor value.
- VL is the voltage across the inductor (VIN - VOUT).
- tPD is the internal propagation delay.
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The current limit can exceed static values, especially if the input voltage is high and very small inductances are used. The dynamic high side switch peak current can be calculated as follows:
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