23 June 2005
HE104MAN-V8 Manual
Note: that only the ESR of the output capacitor is used in the formula. It is assumed that the capacitor is purely resistive at the frequencies about 20kHz. Worst case output ripple is at highest input voltage. Ripple voltage is independent of load (for continuous mode).
Example
Vout = 5V, Vin = 28V, L1 = 55uH, frequency = 50kNz and three 330uF capacitor with 27 mohm ESR in parallel.
Vp | 0.009 ∙ 5∙ (1- ( 5 )) | ||
| 28 |
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55∙ 10E6 ∙ 0.5 ∙ 10E5
3.6Bus Termination (Optional)
AC bus termination is provided by 5 “RC” SOIC packages (3 only for
| RC1 | RC2 | RC3 | RC4 | RC5 |
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1 | GND | GND | GND | GND | GND |
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2 | *SMEMW | IRQ10 | *BACK6 | SA11 | SA3 |
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3 | AEN | LA22 | SD9 | *Refresh | BALE |
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4 | IOCHRDY | IRQ11 | DRQ6 | SA12 | SA4 |
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5 | SD0 | LA21 | *DACK7 | DRQ1 | IRQ3 |
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6 | SD1 | LA20 | SD11 | SA13 | SA5 |
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7 | SRDY | IRQ15 | DRQ7 | *DACK1 | *DACK2 |
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8 | SD2 | LA19 | SD12 | SA14 | SA6 |
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9 | SD3 | LA18 | SA15 | SA7 | |
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10 | GND | GND | GND | GND | GND |
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11 | GND | GND | GND | GND | GND |
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12 | SD7 | *MEMR | SD15 | *IOW | IRQ6 |
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13 | SD6 | LA17 | SD14 | SA17 | SA9 |
14 | SD5 | LA18 | SD13 | *IOR | IRQ5 |
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15 | SD4 | IRQ12 | SD10 | SA16 | SA8 |
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16 | DRQ2 | LA23 | SD8 | *DACK3 | IRQ4 |
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17 | SA19 | *IOCS16 | DRQ5 | DRQ3 | DA2 |
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18 | *SMEMR | *SBHE | *MEMW | IRQ7 | SA1 |
19 | SA18 | *MEMCS16 | *DACK5 | SA10 | SA0 |
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20 | GND | GND | GND | GND | GND |
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In addition, the following signals are terminated with discrete components.
- | TC C1 (330pF) |
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- | Reset C20 (330pF) |
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| Tel: | 800.665.5600, 604.945.9565 | 19 |
| 1407 Kebet Way, Unit 100 | Fax: | 604.945.9566 |
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| Port Coquitlam, BC V3C 6L3 |
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| Canada | Web site: |
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