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TLV803E データシート(PDF) 20 Page - Texas Instruments |
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TLV803E データシート(HTML) 20 Page - Texas Instruments |
20 / 44 page TLV810EA29 VDD GND RESET VDD GND ENABLE Battery Charger 3 V 20 TLV803E, TLV809E, TLV810E SLVSES2F – AUGUST 2018 – REVISED JUNE 2020 www.ti.com Product Folder Links: TLV803E TLV809E TLV810E Submit Documentation Feedback Copyright © 2018–2020, Texas Instruments Incorporated 9.3 Typical Application A typical use case for the push-pull active-high device variant TLV810E is overvoltage monitoring. The TLV810E can monitor a power supply, a MCU power rail, or a battery during charging for example. The VDD pin monitors the voltage rail and once VDD rises above VIT+, the RESET output deactivates to logic low after the reset delay time tD. If VDD falls below VIT-, the RESET output activates to logic high after the propagation delay (tPD_HL). The voiltage thresholds and the reset delay time depends on the device variant. See Device Comparison for device variant naming nomenclature. Figure 35. TLV810E Overvoltage Monitor Circuit for Battery Charger 9.3.1 Design Requirements In this application design, the TLV810E device is monitoring a 3 V battery connected to a battery charger. The battery charger turns on when the battery voltage is below 2.93 V and turns off once the battery charges to 2.96 V and remains above 2.96 V for at least 200 ms. The design must be low power and not consume more than 500 nA typical. 9.3.2 Detailed Design Procedure Select the TLV810EA29 to accomplish this design. The TLV810EA29 is a push-pull active-high device with a VIT- = 2.9 V and VIT+ = 2.9 + 1.2% = 2.93 V. Because the device is a push-pull output and the device threshold meets the design requirements, no external resistors are needed. The TLV810EA29 device variant comes with 200 ms reset delay time meaning VDD must be above VIT+ for at least 200 ms for the RESET output to transistion to logic low to turn off the battery charger. This device meets the low power requirement because the TLV810E only consumes 250 nA typical. |
同様の部品番号 - TLV803E_V05 |
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同様の説明 - TLV803E_V05 |
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