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TGP-751 Datasheet(PDF) 10 Page - List of Unclassifed Manufacturers

Part # TGP-751
Description  ThermoHarvesting Power Module
PDF  19 Pages
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Manufacturer  ETC2 [List of Unclassifed Manufacturers]
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Micropelt - preliminary - Datasheet TE-CORE v2.5 | Page 10
Thermoharvesting Module
Micropelt TE-CORE
3.
TE-CORE Components and Connectors
3.1 Output and Power Management
The TGP output voltage is stepped-up to a maximum
voltage of 5.5 V. The harvested energy is buffered in
capacitor C3 . A configurable hysteresis control ensures
the buffer is full before the TE-CORE’s output is activat-
ed, and turned off before the target output voltage is
under run or even killing the step-up oscillation. The
output voltage is controlled by a configurable compar-
ator.
3.1.1 Storage Charge Hysteresis Configuration
The comparator (IC2, MICREL MIC833) turns the output
ON once the voltage of capacitor C3 reaches Uhigh set
by the resistors R4 , R5 and R6 according to Equations 1
below. The output is turned OFF when the voltage of
C3 under runs Ulow, so the entire harvested energy is
used to recharge the storage capacitor C3.
(Eq. 1)
(Eq. 2)
3.1.2 Output Voltage Configuration
The comparator (IC3,, TI TPS780 Series) controls the
configurable constant output voltage of the TE-CORE
module (2.4 V by default) as long as the voltage from
IC2 is ON. The voltage level is set by the resistors R2
and R3 according to Equation 2 below.
(Eq. 3)
PCB top view
TGP: TGP-751 or TGP-651
X1: Connector for Texas Instrument evaluation board
eZ430-RF2500T (PIN 2 - VCC; PIN 5 - GND)
C3: Storage capacitor 100 µF
C33: Capacitor extension interface
PCB bottom view
J1, J2: Soldering pads output polarity selection
J3:
Soldering pad to disconnect TGP from
DC-DC booster / power management
X2:
Regulated DC output; Uout = 2.4 Volt by default
C33: Capacitor extension interface (not populated)
J4:
Soldering pad to disconnect indicator LED D3
P1:
Test pad for storage capacitor voltage
P2:
GND
P3:
Raw TGP output (disconnect J3 before use)
Magnet - Mounting position for permanent magnet
)
3
2
1
(
R
R
U
U
FB
out
Volt
UFB
216
.
1
)
6
5
6
5
4
(
R
R
R
R
R
U
U
ref
low
)
6
6
5
4
(
R
R
R
R
U
U
ref
high
Volt
U ref
24
.
1
TGP
Heatsink
Interface
TGP
Heat Source
Interface



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