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dc2151af
DEMO MANUAL DC2151A
LTC3331
DC2051A F16
AC1
V
IN
CAP
V
IN2
AC2
SWB
SWA
SW
V
OUT
SCAP
BAL
PGVOUT
EH_ON
IPK2
IPK1
IPK0
OUT2
OUT0
OUT1
V
IN3
0.1µF
6.3V
NC7SZ58P6
×2
UVLO RISING = 12V*
UVLO FALLING = 11V
IPEAK_BB = 100mA
22µF
25V
1µF
6.3V
4.7µF
6.3V
UV3
UV2
UV1
UV0
BAT_IN
FLOAT1 FLOAT0 LBSEL SHIP GND
CHARGE
130k
BB_IN
BAT_OUT
LINEAR TECHNOLOGY DC9003A-AB
DUST MOTE FOR WIRELESS MESH NETWORKS
PGOOD
EHORBAT
T
X
V
SUPPLY
GND
V
OUT
= 3.6V FOR EH_ON = 1
V
OUT
= 2.5V FOR EH_ON = 0
100µF
6.3V
22µH
22µH
*FOR PEAK POWER TRANSFER, CENTER THE UVLO WINDOW
AT HALF THE RECTIFIED OPEN CIRCUIT VOLTAGE OF THE PIEZO
22µF
6.3V
3.45V
LiFePO
4
+
1µF
6.3V
MIDE V25W
Figure 16. Dust Mote Setup without a Supercapacitor and with
EH_ON Connected to OUT2
V
OUT
1.00V/DIV
V
IN
2.00V/DIV
PGV
OUT
5.00V/DIV
EH_ON
5.00V/DIV
100ms/DIV
DC2051A F17
Figure 17. Output Voltage Charging with Dust Mote Attached
without Supercapacitor
connection to a Dust mote (Dc9003a-B)
