Auxiliary power supply devices and nonvolatile memory systems including the same
First Claim
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1. A nonvolatile memory system comprising:
- a nonvolatile memory device;
a memory controller configured to control the nonvolatile memory device; and
an auxiliary power supply device configured to receive an input power and supply an output power to the nonvolatile memory device and to the memory controller,wherein the auxiliary power supply device comprises a first power storage unit and a second power storage unit,wherein the auxiliary power supply device is configured to detect a sudden power-off, to initially supply stored power of the first power storage unit to the nonvolatile memory device and the memory controller as the output power when the sudden power-off is detected, and to subsequently supply stored power of the second power storage unit to the nonvolatile memory device and the memory controller as the output power after supplying the stored power of the first power storage unit, andwherein the first power storage unit is configured to supply a larger power supply amount per unit time than the second power storage unit, and the second power storage unit is configured to supply stored power for a longer time than the first power storage unit.
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Abstract
An auxiliary power supply device can include a first power storage unit, a first charging circuit to receive input power and charge the first power storage unit, a second power storage unit having lower power supply speed than the first power storage unit and longer power supply time than the first power storage unit, a second charge circuit to receive input power and charge the second power storage unit, and a switching unit to supply the stored power of the first power storage unit to external devices for a predetermined time when a sudden power-off occurs and supply stored power of the second power storage unit to the external devices after the predetermined time elapses.
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Citations
19 Claims
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1. A nonvolatile memory system comprising:
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a nonvolatile memory device; a memory controller configured to control the nonvolatile memory device; and an auxiliary power supply device configured to receive an input power and supply an output power to the nonvolatile memory device and to the memory controller, wherein the auxiliary power supply device comprises a first power storage unit and a second power storage unit, wherein the auxiliary power supply device is configured to detect a sudden power-off, to initially supply stored power of the first power storage unit to the nonvolatile memory device and the memory controller as the output power when the sudden power-off is detected, and to subsequently supply stored power of the second power storage unit to the nonvolatile memory device and the memory controller as the output power after supplying the stored power of the first power storage unit, and wherein the first power storage unit is configured to supply a larger power supply amount per unit time than the second power storage unit, and the second power storage unit is configured to supply stored power for a longer time than the first power storage unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An auxiliary power supply device comprising:
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a first power storage unit; a first charging circuit configured to receive an input power and charge the first power storage unit; a second power storage unit configured to supply a smaller power supply amount per unit time than the first power storage unit and configured to supply power for a longer time than the first power storage unit; a second charging circuit configured to receive the input power and charge the second power storage unit; and a switching unit configured to switch between supplying stored power of the first power storage unit to a plurality of devices and supplying stored power of the second power storage unit to the plurality of devices after a sudden power-off occurs. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A solid state drive comprising:
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a plurality of nonvolatile memory devices; a buffer memory; a solid state drive controller; and an auxiliary power supply device configured to receive an input power and supply an output power to the plurality of nonvolatile memory devices, the buffer memory, and the solid state drive controller, wherein the auxiliary power supply device comprises a first power storage unit and a second power storage unit, and wherein the auxiliary power supply device is configured to detect a sudden power-off, to initially supply stored power of the first power storage unit to the plurality of nonvolatile memory devices, the buffer memory, and the solid state drive controller as the output power when the sudden power-off is detected, and to subsequently supply stored power of the second power storage unit to the plurality of nonvolatile memory devices, the buffer memory, and the solid state drive controller as the output power after supplying the first stored power, and wherein the first power storage unit is configured to supply a larger power supply amount per unit time than the second power storage unit, and the second power storage unit is configured to supply stored power for a longer time than the first power storage unit.
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Specification