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AN8049 Datasheet(PDF) 6 Page - Panasonic Semiconductor |
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AN8049 Datasheet(HTML) 6 Page - Panasonic Semiconductor |
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6 / 23 page  AN8049FHN Voltage Regulators 6 Pin No. Equivalent circuit Description I/O 1 DT2: I Sets the channel 2 soft start time. Set the time by connecting a capacitor between this pin and ground. Note that although the channel 2 maximum on duty is set internally to 86%, the maximum on duty can be set to a value of 86% or less by inserting a resistor between this pin and ground, and can be set to a value of 86% or more by inserting a resistor between this pin and the VREF pin. 2 DT1: Sets the channel 1 soft start time. Set the time by connecting a capacitor between this pin and ground. Note that although the channel 1 maximum on duty is set internally to 86%, the maximum on duty can be set to a value of 86% or less by inserting a resistor between this pin and ground, and can be set to a value of 86% or more by inserting a resistor between this pin and the VREF pin. 3 CTL3: I Controls the on/off state of channel 3. A delay can be provided in the power supply turn-on start time by connecting a capacitor between this pin and ground. tDLY3 = 1.26 (V) × CCTL3 (µF)/1.1 (µA) (s) This pin can also be used to control the on/off state with an external signal. In that case, the allowable input voltage range is from 0 V to VCC. Note that during U.V.L.O. and timer latch operation, this pin is connected to ground through a 20 k Ω resistor. s Terminal Equivalent Circuit PWM2 50 k Ω 50 k Ω 1 7 15 20 PWM1 50 k Ω 50 k Ω 15 22 7 2 1.26 V VCC 20 k Ω 1.1 µA High channel 3 operation is turned off. 3 |
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Similar Description - AN8049 |
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