MAX1612EVKIT Maxim Integrated, MAX1612EVKIT Datasheet - Page 2

• Manufacturer Part Number: MAX1612EVKIT
• Description: Power Management IC Development Tools
• Manufacturer: Maxim Integrated
• Series: MAX1612EVKITr

2) Connect a 15V power supply to the VCHARGE pad
3) Turn on the power supply and momentarily press
4) The battery will take up to 16 hours to charge. Full
5) Physically disconnect the input supply, and the
Note: The board may be operated using an external 2.4V
power supply instead of the on-board battery by removing the
shunt across jumper J2 and attaching the supply to the BBATT
pin.
MAX1612 Evaluation Kit
Table 1. Jumper Functions
2
JUMPER
and voltmeters to the FULL and VMAIN pads.
Switch SW1 to reset the internal counter. Then verify
that the voltmeter attached to the FULL pad indi-
cates a logic-low level (< 0.4V). Jumper J3 con-
nects the FULL pin to the
MAX1612 in the battery-charge mode. The voltmeter
attached to the VMAIN pad will read the input volt-
age.
charge is indicated when the FULL pin goes high
(> 2.4V).
VMAIN voltage will be held above 6V by the
MAX1612.
_______________________________________________________________________________________
-J1
-J2
J3
J4
J5
POSITION
SHUNT
Shorted
Shorted
Shorted
Shorted
Shorted
Open
Open
Open
Open
Open
VCHARGE connected to VMAIN
VCHARGE disconnected
On-board battery connected
On-board battery disconnected
CCMD pin connected to the FULL pin
CCMD pin open
BBON pin connected to the LBO pin
BBON pin open
DCMD pin connected to the LBO pin
DCMD pin open
CCMD pin, placing the
PIN CONNECTION
The MAX1612 evaluation board can be operated with
or without external control. With shunts across J1–J5,
the board will drive VMAIN to 6V when VCHARGE is
removed and will control the charging of the bridge
battery whenever VCHARGE is greater than 7V.
Alternatively, the shunts across J3–J5 can be removed
and external signals used to control the board.
The jumpers on the board may be removed to allow
alternate batteries or to control the MAX1612 with exter-
nal signals. Table 1 lists the jumpers and their func-
tions.
The capacitor values controlling the charge and dis-
charge timers will need to be adjusted for each appli-
cation. The ideal charge time depends on the charge
current set by R2 and the actual battery being used.
The discharge time depends on the load during the
discharge cycle. Refer to the MAX1612 data sheet for
instructions on selecting values for your application.
Resistor R1 and diode D2 may be installed to provide a
low-level current to compensate for the bridge battery’s
self-discharge.
Normal connection
Normal connection
An external battery or power supply may be connected to
the BBATT pad.
Charges the battery whenever the FULL pin goes low.
Charge cycle controlled by an external signal connected to
the CCMD pad.
Turns on the DC-DC converter whenever the LBO pin goes
low.
DC-DC converter controlled by an external signal connect-
ed to the BBON pad. See Figure 2 in the MAX1612 data
sheet.
The internal timer counts down whenever the LBO pin is
low.
The countdown function is controlled by an external signal
connected to the DCMD pad.
MAX1612 OPERATION
Detailed Description
Component Selection
Jumper Selection