PowerTech MB-3690 Instruction Manual page 2

Introduction
This compact DC - DC Isolated 4 stage Boost charger uses the
latest switch-mode technology and is designed to meet all modern
automobile applications, particularly dual battery systems.
Galvanic isolated means you can connect to any load without
worrying about interference from the input to the output.
The 4 stage DC-DC Boost Charger is designed to charge
Lead-acid batteries in dual battery systems to their best level,
thanks to a smart 4-stage charging algorithm and voltage boosting
to deliver a full charge without the issue of voltage drops. This
improves the charge delivered to your battery, increasing battery
life and saving on premature battery failure.
Since the DC supply from a vehicle's alternator is often unstable
leading to a shortened lifespan of electronic device, this DC-DC
isolated boost charger can be used as a constant power supply to
run accessories that require a stable and clean DC voltage.
For example: LCD TV, Digital Hi-Fi system, Wireless telephone
systems, refrigeration systems, LED lighting, games, mobile
computer and more....
The DC-DC boost charger is designed with overload and short
circuit protection. It will automatically switch off the unit and re-start
if the overload or short circuit problem is corrected. The cooling fan
is thermal controlled. It will switch on and off automatically to
control the internal temperature of the unit.
Remote on/off controls
The male terminal (6.3mm) on the front panel is used for remotely
switching on the DC-DC charger by applying 9-30VDC positive
voltage (e.g. ignition from the vehicle engine or an external switch).
Note: The working voltage is 32VDC maximum. The device power
on/off switch must be switched off if you are using this feature.
External switch
for remote On/Off
CAUTION!
Do not connect the male terminal to DC source over 32VDC or the
device will be damaged. Keep the remote ON/OFF terminal
insulated if it is not in use.
Output Voltage Setting Table
SW No. Battery Selector
1 ON OFF OFF
2 * ON OFF
3 * * ON
4
5
6 OFF OFF OFF
12V
14.8 14.6 14.2
Output
Note: Dip-SW No. 1, 2 and 3 are switched off automatically (regardless it is on/off), when
Dip-SW No. 6 is switched on.
Battery
Dip Switch Setting
Type
/
SLA GEL SW 3 ON, SW 1,2,4,5,6 OFF
AGM SW 2,5 ON, SW 1,3,4,6 OFF
FLOODED SW 1,4 ON, SW 2,3,5,6 OFF
Apply switched
9~30VDC positive
Float Voltage Power Supply
ON OFF OFF ON OFF
OFF ON OFF OFF ON
OFF OFF OFF ON ON
13.8 13.5 13.2 13.8 13.5
Bulk /
Float Volt
Absorption Volt
13.2V 14.2V
13.5V 14.6V
13.8V 14.8V
Instruction and normal responses
Operation as DC booster charger
Connect the input to the DC source, such as your vehicle
alternator or cranking battery using suitable size cabling and fuse.
Adjust the charge setting dip switch to get the optimum charge to
suit your battery specification.
Connect the battery to the DC output. . Turn ON the Power switch,
the "POWER ON" LED lights up, this indicates the device is ready
for charging. The smart DC-DC boost charger will perform the
four stage charge automatically The "BULK" LED lights up. This
means the battery charger is beginning at the 1
charging.
rd
At the 3 stage, the charger will switch to "ABSORPTION" mode,
the red LED goes out and the yellow LED lights up. The device is
delivering constant voltage to the battery with reduced current.
The charging voltage can be set by the switch No. 1,2 and 3.
th
At the 4 stage, the battery has been charged to about 90% of its
rated capacity. The "ABSORPTION" LED goes out and the
"FLOAT" green LED lights up. The charging current is decreased
and the charging voltage is held at a constant level. Battery is
now under "FLOAT" constant charging. The charging voltage can
be set by the switch No.4 and 5.
Operation as power supply
The device can be used as a Power Supply. Set the switch No. 6
to ON position. The device now operates as a power supply unit.
The bulk and absorption LED goes out. Switch No. 1,2 and 3 are
now disabled. The POWER ON and FLOAT LED light up. The
power supply output voltage can be set by the switch No.4 and 5.
CAUTION!
Do not use the device near flammable materials or in any
1.
location that may accumulate flammable fumes or gasses.
Hot surface when operating, especially at full load condition.
2.
Make sure the polarity is correct
3.
Do not locate the device on the top of the battery. Especially
4.
Flooded, Wet type battery. It may generate gas vapor while
charging.
Do not charge non-rechargeable batteries.
5.
Use the appliance only in the described manner.
6.
Do not expose the device to a heat source, such as direct
7.
sunlight or heating.
OFF
Store the device in a dry and cool place
8.
OFF
ON
Safety Operation!
13.2
If cables have to be fed through walls with sharp edges,
A.
always use tubes or ducts to prevent damage.
Do not pull on the cable, fasten the device and cable
B.
securely. Lay the cable so that it cannot be tripped over..
Use the device only in the described manner.
C.
Children should be supervised to ensure that they do not
D.
play with the device.
Do not allow water to drip or splash on the device.
E.
Make sure the air inlets and outlets of the device are not
F.
covered.
Operate the device only if you are certain that the housing
G.
and the connection cables are undamaged.
st
st
The 1 stage is to ensure battery is
always charged at the maximum
charging condition. This is to boost
up the charging cycle and particularly
wake up a weak battery to absorb
energy.
After 10-20 mins, the charger will
nd
switch to 2 stage, the "BULK" LED
remains ON, the battery is charged at
the maximum current to the battery.
stage of