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MCP16251 Datasheet(PDF) 13 Page - Microchip Technology |
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MCP16251 Datasheet(HTML) 13 Page - Microchip Technology |
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13 / 32 page  2013 - 2016 Microchip Technology Inc. DS20005173B-page 13 MCP16251/2 4.2.6 INTERNAL COMPENSATION The error amplifier, with its associated compensation network, completes the closed-loop system by comparing the output voltage to a reference at the input of the error amplifier, and feeding the amplified and inverted signal to the control input of the inner current loop. The compensation network provides phase leads and lags at appropriate frequencies to cancel excessive phase lags and leads of the power circuit. All necessary compensation and slope com- pensation components are integrated. 4.2.7 SHORT-CIRCUIT PROTECTION Unlike most boost converters, the MCP16251/2 allows its output to be shorted during normal operation. The internal current limit and overtemperature protection limit excessive stress and protect the device during periods of short circuit, overcurrent and overtemperature. While operating in Input-to-Output Bypass mode, the P-Channel current limit is inhibited to minimize quiescent current. 4.2.8 LOW NOISE OPERATION The MCP16251/2 integrates a low noise anti-ring switch that damps the oscillations typically observed at the switch node of a boost converter when operating in Discontinuous Inductor Current mode. This removes the high frequency radiated noise. 4.2.9 OVERTEMPERATURE PROTECTION Overtemperature protection circuitry is integrated in the MCP16251/2 devices. This circuitry monitors the device junction temperature and shuts the output off if the junction temperature exceeds the typical +160°C. If this threshold is exceeded, the device will automatically restart once the junction temperature drops by 20°C. During thermal shutdown, the device is periodically checking temperature; once the temperature of the die drops, the device restarts. Because the device takes its bias from the output (to achieve lower IQ current) while in thermal shutdown state, there is no low reference band gap and the output may be higher than zero for inputs below 1.4V typical. The soft start is reset during an overtemperature condition. |
Similar Part No. - MCP16251_16 |
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Similar Description - MCP16251_16 |
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