MB3887
■BLOCK DIAGRAM
−INE1 | 8 |
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OUTC1 10 | <Current Amp1> | <Error Amp1> |
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+INC1 13 | + | VREF |
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− |
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| ⋅ 20 |
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−INC1 | 12 | − | + |
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| 21 VCC (O) |
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+INE1 | 9 |
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| <PWM Comp.><OUT> |
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FB1 7 |
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| + |
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| + |
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| + |
| Drive | 20 OUT |
−INE2 | 4 |
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OUTC2 | 2 | <Current Amp2> | <Error Amp2> | VCC |
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| VREF |
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+INC2 24 | + |
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− |
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| ⋅ 20 |
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| 19 VH | |
−INC2 | 1 | − | + | Bias |
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| Voltage | (VCC − 6 V) |
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+INE2 | 3 |
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| <VH> |
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| 2.5 V |
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FB2 | 5 |
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| 1.5 V |
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| <Error Amp3> | <UVLO> | VCC |
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| VREF |
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−INE3 16 |
| − | (VCC UVLO) | 215 kΩ |
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OUTD 11 |
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| 35 kΩ |
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| 4.2 V |
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| 0.91 V |
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| (0.77 V) |
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FB3 15 | <SOFT> |
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| VREF |
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| UVLO |
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| VREF |
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| 10 |
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| ∝A |
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| VCC |
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CS 22 |
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| 4.2 V |
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| 18 VCC | |
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| <OSC> | <REF> | <CTL> | 14 CTL | |
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| 45 pF |
| VREF |
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| bias | 5.0 V |
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| 17 | 6 |
| 23 |
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| RT | VREF | GND |
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5
