MB3878
■PIN DESCRIPTION
Pin No. | Symbol | I/O | Descriptions | |
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1 | −INC2 | I | Current detection amplifier (Current Amp. 2) input pin. | |
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2 | OUTC2 | O | Current detection amplifier (Current Amp. 2) output pin. | |
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3 | +INE2 | I | Error amplifier (Error Amp. 2) | |
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4 | −INE2 | I | Error amplifier (Error Amp. 2) inverted input pin. | |
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5 | FB2 | O | Error amplifier (Error Amp. 2) output pin. | |
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6 | VREF | O | Reference voltage output pin. | |
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7 | FB1 | O | Error amplifier (Error Amp. 1) output pin. | |
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8 | −INE1 | I | Error amplifier (Error Amp. 1) inverted input pin | |
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9 | +INE1 | I | Error amplifier (Error Amp. 3) | |
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10 | OUTC1 | O | Current detection amplifier (Current Amp. 1) output pin. | |
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| With IC in standby mode, this pin is left open to prevent loss of current | |
11 | OUTD | O | through output voltage setting resistance. Set CTL pin to “H” level and | |
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| OUTD pin to “L” level. | |
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12 | −INC1 | I | Current detector amplifier (Current Amp. 1) input pin. | |
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13 | +INC1 | I | Current detector amplifier (Current Amp. 1) input pin. | |
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14 | CTL | I | Power supply control pin. | |
Setting the CTL pin low places the IC in the standby mode. | ||||
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15 | FB3 | O | Error amplifier (Error Amp. 3) output pin. | |
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16 | −INE3 | I | Error amplifier (Error Amp. 3) inverted input pin. | |
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17 | RT | | ||
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18 | VCC | | Power supply pin for reference power supply and control circuit. | |
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19 | VH | O | Power supply pin for FET drive circuit (VH = Vcc − 5 V). | |
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20 | OUT | O | ||
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21 | VCC (O) | | Output circuit power supply pin. | |
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22 | CS | | ||
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23 | GND | | Ground pin. | |
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24 | +INC2 | I | Current detection amplifier (Current Amp. 2) input pin. | |
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