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AAT4626IHS-T1 Datasheet(PDF) 10 Page - Advanced Analog Technology, Inc. |
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AAT4626IHS-T1 Datasheet(HTML) 10 Page - Advanced Analog Technology, Inc. |
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10 / 15 page  AAT4626 USB Dual-Channel Power Switch 10 4626.2006.05.1.2 Hot-Plug Applications Application circuit cards with a high inrush current potential can be limited by use of the AAT4626. The AAT4626 has both slew rate limited turn on characteristics and current limit controlled outputs, which make it ideally suited for power port hot-plug applications. A host power back plane or hot-plug receptacle may be sensitive to short duration, high power surges. The AAT4626 will turn on in a linear ramping fashion and regulate the inrush current within the specified current limit for the device. The error flag usually will not be affected during appli- cation turn-on since the 10ms fault flag blanking time is intended for these types of events. If an application turn-on current surge exceeds 10ms, an RC delay filter may be added to the flag output to prevent the system from receiving an error dur- ing the start-up sequence. Figure 1: Fault Flag Delay RC Filter. R1 10k Ω 100k Ω C1 0.1 μF AAT4626 1 2 3 45 6 7 8 ENA FLGA FLGB ENB OUTB GND IN OUTA V+ USB Controller Over-Current Flag Input Figure 2: AAT4626 Input Inrush Current Protected Dual Output Application. CIN 4.7 μF AAT4626 1 2 3 45 6 7 8 ENA FLGA FLGB ENB OUTB GND IN OUTA CBULKA (120 μF) Card Application Circuit A V+ GND Dual Channel Inrush Current Protected Application Card Cable / Connector to Hot-Plug Port VBUS GND Hot-Plug Receptacle Card Application Circuit B CBULKB (120 μF) 0.1 μF |
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