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TCM680 데이터시트(PDF) 7 Page - Microchip Technology

부품명 TCM680
상세설명  5V To 짹10V Voltage Converter
PDF  18 Pages
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TCM680 데이터시트(HTML) 7 Page - Microchip Technology

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© 2005 Microchip Technology Inc.
DS21486C-page 7
TCM680
4.5
Maximum Operating Limits
The maximum input voltage rating must be observed.
The TCM680 will clamp the input voltage to 5.8V.
Exceeding this maximum threshold will cause exces-
sive current to flow through the TCM680, potentially
causing permanent damage to the device.
4.6
Switched Capacitor Converter
Power Losses
The overall power loss of a switched capacitor
converter is affected by four factors:
1.
Losses from power consumed by the internal
oscillator, switch drive, etc. These losses will
vary
with
input
voltage,
temperature and
oscillator frequency.
2.
Conduction losses in the non-ideal switches.
3.
Losses due to the non-ideal nature of the
external capacitors.
4.
Losses that occur during charge transfer from
the pump to reservoir capacitors when a voltage
difference between the capacitors exists.
The power loss for the TCM680 is calculated using the
following equation:
EQUATION
PLOSS = (IOUT+)
2 X R
OUT
- + (I
OUT-)
2 X R
OUT
+ + I
IN X VIN



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