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参数资料
| 型号： | LTC3108IGN-1#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, PDSO12 |
| 封装： | 0.150 INCH, LEAD FREE, PLASTIC, SSOP-16 |
| 文件页数： | 10/24页 |
| 文件大小： | 1593K |
| 代理商： | LTC3108IGN-1#PBF |
LTC3108-1
31081f
Peltier-Powered Energy Harvester for Remote Sensor Applications
31081 TA02
C1
C2
SW
VS2
VS1
COOPER BUSSMAN PB-5ROH104-R
OR KR-5R5H104-R
VOUT2
PGOOD
2.2V
499k
COUT*
PGD
VLDO
VSTORE
+
VOUT
VOUT2_EN
LTC3108-1
VAUX
GND
CSTORE
0.1F
6.3V
5.25V
3V
1F
1nF
CIN
1:100
T1
T1: COILCRAFT LPR6235-752SML
*COUT VALUE DEPENDENT ON
THE MAGNITUDE AND DURATION
OF THE LOAD PULSE
330pF
T = 1°C TO 20°C
SENSORS
XMTR
P
2.2F
ON
OFF
3V
+
THERMOELECTRIC
GENERATOR
Typical applicaTions
If there were 50A of charge current available and 5A of
load on VOUT, the time for VOUT to reach regulation after
the initial application of power would be 11.35 seconds.
Design Example 2
In many pulsed load applications, the duration, magnitude
and frequency of the load current bursts are known and
fixed. In these cases, the average charge current required
from the LTC3108-1 to support the average load must be
calculated, which can be easily done by the following:
I
t
T
CHG
Q
BURST
≥ +
Where IQ is the sleep current on VOUT required by the ex-
ternal circuitry in between bursts (including cap leakage),
IBURST is the total load current during the burst, t is the
duration of the burst and T is the period of the transmit
burst rate (essentially the time between bursts).
In this example, IQ = 5A, IBURST = 100mA, t = 5ms and
T = one hour. The average charge current required from
the LTC3108-1 would be:
I
A
mA
A
CHG ≥
+
=
5
100
0 005
3600
5 14
.
sec
.
Therefore, if the LTC3108-1 has an input voltage that al-
lows it to supply a charge current greater than 5.14A, the
application can support 100mA bursts lasting 5ms every
hour. It can be determined that the sleep current of 5A is
the dominant factor because the transmit duty cycle is so
small (0.00014%). Note that for a VOUT of 3V, the average
power required by this application is only 15.4W (not
including converter losses).
Note that the charge current available from the LTC3108-1
has no effect on the sizing of the VOUT capacitor (if it is
assumedthattheloadcurrentduringaburstismuchlarger
than the charge current), and the VOUT capacitor has no
effect on the maximum allowed burst rate.
applicaTions inForMaTion
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相关代理商/技术参数 |
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|---|---|
| LTC3108IGN-1-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Ultralow Voltage Step-Up Converter and Power Manager |
| LTC3108IGNPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Ultralow Voltage Step-Up Converter and Power Manager |
| LTC3108IGN-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Ultralow Voltage Step-Up Converter and Power Manager |
| LTC3108IGNTRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Ultralow Voltage Step-Up Converter and Power Manager |
| LTC3108IGN-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Ultralow Voltage Step-Up Converter and Power Manager |
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