VIPER Technical Manual | Power and power management |
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Take into account any external peripherals for your application, such as:
•USB devices: keyboard, memory stick and mouse.
•CompactFLASH socket: CompactFLASH memory or Microdrive.
•Flat panel display: TFT logic + backlight, STN logic + backlight + bias voltage.
The table below gives examples of addition current/power from external peripheral devices:
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| Device | Part number | Condition | current | power | |
32MB Sandisk | Inserted, (no access) | 1mA | 5mW | ||
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CompactFLASH | Reading constantly | 48mA | 240mW | ||
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64MB FlashDio™ | FDU100A | Inserted, (no access) | 75mA | 375mW | |
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USB memory stick |
| Reading constantly | 121mA | 605mW | |
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NEC 5.5” LCD + | LCD and backlight on | 650mA | 3250mW | ||
Inverter (as used |
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+ 65PW31 | LCD on and backlight off | 291mA | 1455mW | ||
with |
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For devices using the 3.3V supply from the CompactFLASH socket and FPD logic supply, use 92% as the regulator efficiency.
© 2007 Eurotech Ltd Issue E | 78 |