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CS8128 数据表(PDF) 4 Page - ON Semiconductor |
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CS8128 数据表(HTML) 4 Page - ON Semiconductor |
4 / 8 page The CS8128 function is very precise, has hysteresis on both the and Delay comparators, a latching Delay capacitor discharge circuit, and operation down to 1V. The reset circuit output is an open collector type with ON and OFF parameters as specified. The reset output NPN transistor is controlled by the Low Voltage Inhibit and Reset Delay circuits (see Block Diagram). This circuit monitors output voltage, and when output voltage is below VRTL, causes the reset output transistor to be in the ON (saturation) state. When the output voltage is above VRTH, this circuit permits the reset output transistor to go into the OFF state if allowed by the reset Delay cir- cuit. This circuit provides a programmable (by external capaci- tor) delay on the output lead. The Delay lead pro- vides source current to the external delay capacitor only when the Low Voltage Inhibit circuit indicates that output voltage is above VRTH. Otherwise, the Delay lead sinks current to ground (used to discharge the Delay capacitor). The discharge current is latched ON when the output volt- age falls below VRTL. The Delay capacitor is fully dis- charged anytime the output voltage falls out of regulation, even for a short period of time. This feature ensures a con- trolled pulse is generated following the detection of an error condition. The circuit allows the out- put transistor to go to the OFF (open) state only when the voltage on the Delay lead is higher than VDTC. RESET RESET RESET RESET Delay Circuit Low Voltage Inhibit Circuit RESET RESET 4 RESET VRH VOUT VRTH VRTL VRL Delay VDTC VDTD VDH TD VDIS (3) (1) (2) (2) RESET Circuit Waveform RESET Circuit Functional Description (1) = No Delay Capacitor (2) = With Delay Capacitor (3) = Max: RESET Voltage (1.0V) |
类似零件编号 - CS8128 |
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类似说明 - CS8128 |
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