MAX17710GBEVKIT# Maxim Integrated, MAX17710GBEVKIT# Datasheet - Page 4

• Manufacturer Part Number: MAX17710GBEVKIT#
• Description: Power Management IC Development Tools MAX17710 EVAL KIT
• Manufacturer: Maxim Integrated
• Type: Energy Harvestingr
• Series: MAX17710r

Specifications of MAX17710GBEVKIT#

• Rohs: yes
• Product: Evaluation Kits
• Tool Is For Evaluation Of: MAX17710GB
• Input Voltage: 4.875 V to 5.7 V
• Output Voltage: 1.8 V, 2.3 V, 3.3 V
• Description/function: The MAX17710 evaluation kit (EV kit) is a fully assembled and tested PCB that contains all the components necessary to evaluate the performance of the MAX17710 energy-harvesting charger and protector
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Output Current: 1 uA
• Part # Aliases: 90-NC01K#B01
• For Use With: MAX17710GB

The CHG test point monitors the CHG pin. The CHG test
point is connected to the output of the boost regulator
and the CHG pin is the input to the battery charger. The
IC charges the MEC based off the voltage on the CHG
test point. The power sources to the CHG test point can
come from solenoid, piezo, mechanical, or RF sources,
and must exceed the MEC voltage. When CHG exceeds
the MEC voltage by 50mV, the IC uses the CHG supply
to charge the on-board MEC. The IC is designed to use
input supplies from energy-harvesting sources, which
are highly variable, poorly regulated, and usually power-
limited. Apply the variable input supply source to the
AC+ and AC- test points. The power source is rectified
and supplied to the CHG test point through the full-wave
bridge diode (D2).
For power sources that are lower than the battery
voltage, such as solar or the above-mentioned sources,
the IC features a boost converter to step up the voltage to
charge the on-board MEC. The output of the boost is the
CHG test point. The IC uses the voltage on the CHG test
point to charge the MEC. An additional power source can
be present on CHG through the AC+ and AC- test points
while the boost is active.
Figure 1 shows the CHG test-point voltage observed on an
oscilloscope with ambient light using the on-board
solar cells as the power source. The number of pulses
increase as the EV kit is brought closer to the light source
and decrease when taken away from the light source.
The on-board power source is a parallel connection of
three solar cells. The voltage can be monitored on the
SOLAR+ and GND test points. The start-up voltage for
the IC boost is approximately 750mV at the FB pin. To
supply an external power source, remove the shunt from
jumper JU3 and apply the power source to the SOLAR+
and GND test points.
The EV kit features the THINERGY micro-energy cell
(MEC) from IPS as the on-board energy storage cell.
The MEC101 included on the EV kit is roughly the size of
a postage stamp and is soldered directly to the board.
The BATT footprint can also accommodate the MEC201.
Caution: The MEC case is conductive. To protect the
MEC, do not touch the MEC with conductive material.
The IC has a regulator output and battery pack output
(PCKP) to provide power to external loads. The IC PCKP
test point provides the MEC voltage to external loads
while the REG test point provides a regulated voltage
(Table 3). External unregulated loads from the MEC
should always be connected through the PCKP test
On-Board Micro-Energy Cell (BATT)
_________________________________________________________________ Maxim Integrated Products 4
MEC Pack Power
Power Sources
Internal Boost
Charger
point. External loads connected directly from the MEC
can cause irreversible damage to the MEC if the voltage
goes too low.
The D5 LED is connected through a digital FET at the
PCKP test point. The LED blinks as pulses are generated
at the CHG test point. The LED is a visual display that the
boost regulator is operating.
The EV kit provides various pushbutton switches and test
points to evaluate the device. There are two regulators
internal to the IC, which are available through AE and
LCE. AE controls the default regulator and LCE controls
the low-current regulator.
The IC features a default regulator that can be enabled
by the AE signal. Press the S1 switch to connect PCKP
and enable the default regulator. Press the S2 switch
to disconnect PCKP and disable the default regulator
output. The output voltage is selected by jumper JU4
(see Table 3). If the MEC voltage drops below 2.15V,
the AE and PCKP outputs are disabled until a charger
is applied.
The IC features a low-current regulator that reduces
the quiescent current by a factor of 5. The low-current
regulator can be enabled by the LCE and AE signals.
To enter the low-current mode, first turn on the default
regulator by pressing S1, then press S3 to enable the
low-current regulator, and finally turn off the default regu-
lator by pressing S2. Afterwards, press S4 to disable the
low-current regulator. If low-current mode is enabled,
pressing S1 enables the default regulator, but pressing
S2 switches back to the low-current regulator if originally
enabled. If the MEC voltage drops below 3V, the AE and
PCKP outputs are disabled until a charger is applied.
Table 3 shows the regulator output options. SEL1 is con-
nected to jumper JU4. The regulator output is locked
when the regulator is active. To change the regulator
output voltage, first change the setting on jumper JU4 to
obtain the desired output voltage (Table 3), then press
S2 and S4 to disable both the default and low-current
regulators. Lastly, press S1 to enable the default regula-
tor and optionally S3 to enable the low-current regulator.
The regulator output voltage can be monitored on the
REG test point and outputs the new voltage.
Table 3. Regulator Output Voltage (SEL1)
*Default position.
Unconnected
SEL1
BATT
Evaluates: MAX17710
GND
JU4 SHUNT POSITION
Regulator Output Voltage (SEL1)
Low-Current Mode Enable (LCE)
Not installed*
Regulator Output Enable (AE)
LED Indicator On Pack Power
1-2
2-3
Logic Inputs
REG (V)
1.8
2.3
3.3