HL8512/22 12V/5V Input Voltage 5A Continuous Load E-Fuse Datasheet
■The HL8512/22 family of E-Fuse are designed to protect circuitry on the output(OUT) from transients on power bus(IN) and large inrush current and protect the power bus from undesired output shorts and unexpected over-load condition.
■When the output ramps up, inrush current is limited by limiting the slew rate of output voltage. The slew rate is controlled by a small capacitor at SS pin. An internal small current source charges the SS pin external capacitor. The output voltage tracks the SS pin voltage with a constant ratio until internal power MOSFET is fully turned on. When user leaves SS pin floating, the output typical ramps up time is 0.4 ms.
■Current limit level can be set with an external resistor from ISET pin to the ground. An internal charge pump drives the gate of power MOSFET, allowing a very low on-resistance which is just 23 mΩ. When output current is over the current limit setting, the device regulates power MOSFET to clamp the output current at the setting level. The active of current limit circuit causes power consumption of the device increase.
■The thermal accumulation of the device may trigger the thermal shutdown, turning off power MOSFET. After the thermal shutdown, HL8512FN01/22FN01 will turn on the power MOSFET again when auto retry delay time(tTSD_dly) expires; HL8512FN02/22FN02 will latch off the power MOSFET unless power cycling input voltage or toggles EN pin.
■The output over-voltage event is limited by internal clamping circuits to a safe fixed maximum without external components. For over-voltage protection (OVP), HL8512 provides for 12 V systems; and HL8522 provides for 5 V systems.
■HL8512/22 is available in a DFN-10L package with 3mm x 3mm size.
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HL8512 、 HL8522 、 HL8512FN01 、 HL8522FN01 、 HL8512FN02 、 HL8522FN02 |
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Datasheet |
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Please see the document for details |
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DNF-10L |
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English Chinese Chinese and English Japanese |
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June 2023 |
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V1.0 |
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2.3 MB |
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