BATT-MAN click
PID: MIKROE-2901
Weight: 30 g
BATT-MAN click is a very versatile battery operated power manager. When powered via
mikroBUS™, it will charge the connected Li-Ion/Li-Po 3.7V battery, while providing the output
voltage on all its outputs at the same time. The interesting feature of this device is that it can
provide additional current to the connected load if the current provided from the mikroBUS™
socket is not enough. This is possible by utilizing the connected battery and by employing
intelligent power routing algorithms of BATT-MAN click.
This click has several output voltage options - it can charge the connected battery from the
mikroBUS™ power rails and it is very efficient when it comes to using 5V rail of mikroBUS™.
It also has an EN Vout switch (SW1) that is used to enable the BATT-MAN click power outputs,
even when the click is not connected to mikroBUS™. This allows for the click board™ to be
used as the standalone battery-powered voltage regulator. BATT-MAN click can be used as a
very efficient 5V battery charger and as a power supply for various portable devices and
applications.
How does it work?
The core component of BATT-MAN click is the LTC3586, a high-efficiency power manager
with boost, buck-boost, and dual buck converters from Linear Technology. It includes a highefficiency current limited switching PowerPath™ manager with automatic load prioritization
which employs the Bat-Track™ adaptive output control technology, battery charger and four
synchronous switching regulators (two bucks, one buck-boost, and one boost). The LTC3586 has
a working mode that sets the PowerPath™ manager never to exceed 1A of the input current.
As soon as the device is plugged into the mikroBUS™ socket, it will detect a presence of the
voltage from the 5V rail, on the input pins (VBUS). PowerPath™ switching regulator will
deliver power from VBUS to VOUT via the SW pin. The VOUT is used to drive external loads
through the switching regulators, along with the integrated battery charger. If this combined
current draw does not exceed the internally set current threshold, the voltage at the VOUT pin
(VSYS on the included schematic) will be held at about 0.3V above the battery voltage level thanks to the Bat-Track™ technology, keeping the losses across the battery charger to a
minimum. If the combined current draw is large enough, the current available for the charger
will be reduced, in order to provide more current for the connected load. The PowerPath™
manager will always ensure that the connected load has the priority over the battery charging.
Only the excess power will be used for the charger section of the device.
The provided internal ideal diode and the ideal diode controller allow the battery power to be
used for the output. Whenever the VSYS drops under the VBAT level or the load requires more
current than it is currently available from the input switching regulator, the additional power will
be pulled from the battery via the ideal diode. This allows the continuous power output for the
connected external load, as long as the connected battery is charged. The internal ideal diode is
supplemented by the external MOSFET transistor, which is controlled by a dedicated GATE pin
of the LTC3586 IC.
There are several outputs available on BATT-MAN click. There is one LDO output voltage,
regulated to 3.3V. This is a very low current output and it can provide about 30mA of current.
This output is always on and it is intended only for very light loads. The second regulated 3.3V
output is a high current output and it can provide up to 1A of current. Heavier loads can be
connected to this output. Finally, a 5V regulated output can provide up to 800mA of current and
it is also meant for heavier loads. All these voltage connectors are accessed through the onboard
screw terminals, for an easy connection.
The battery charging section has all the features required for optimized charging and prolonged
battery life, including a constant current/voltage battery charger with automatic recharge,
automatic termination by safety timer, low voltage trickle charging and bad cell detection. The
battery float voltage is set to 4.2V, which is perfectly suited for the LiPo batteries available at
MikroElektronika online shop. The battery charging section also features the #CHRG pin, that is
used to indicate the charging state of the battery. It can signalize several states of the battery:
charging, not charging and unresponsive/damaged battery. This is an open drain output and it is
pulled HIGH to the 3.3V provided from the low current LDO regulator. When the battery is
charging, this pin is pulled to a LOW state and the red LED indicator on BATT-MAN click is lit.
When the battery is not charging, the LED is powered off. If the connected battery is damaged, a
6.1Hz modulation signal is applied to the charge indicator LED. The #CHRG pin is routed to the
mikroBUS™ AN pin.
The #FAULT pin is used to indicate an error on the output voltages. If the feedback voltage of
the integrated buck/boost converters fails to reach the 8% of the internal reference voltage within
14ms, this pin will be pulled low to indicate the error, and switching regulators will be shut off.
The #FAULT pin is bidirectional, which means that pulling this pin LOW externally will also
disable the switching regulators. This pin is routed to the mikroBUS™ INT pin and it is pulled
HIGH to the 3.3V provided from the low current LDO regulator.
The device can be turned on by the onboard EN Vout switch (SW1), even in the absence of the
power from the mikroBUS™ 5V rail. In this case, the connected external LiPo battery is
mandatory. EN pins of the switching regulators are routed to the mikroBUS™ RST pin, allowing
the MCU to shut down the device. If the switch is in the closed position, it will pull the RST line
of the mikroBUS™ to a HIGH level via the 3K3 resistor. If the MCU sets the RST pin to a LOW
logic level, the switch position will be superseded by the RST pin, and the logic state of the RST
pin will become LOW.
Besides the onboard screw terminals used to connect the external load, the click board™ also has
a standard 2.54mm pitch battery connector, used to connect the LiPo battery.
Specifications
Type
Boost,Buck
Applications
BATT-MAN click can be used as a very efficient 5V battery charger and as a
power supply for various portable devices and applications.
On-board modules
LTC3586, High-Efficiency USB Power Manager with Boost, Buck-Boost and Dual
Bucks
Key Features
BATT-MAN features very good efficiency and input overcurrent protection,
also it features full-fledged battery charger and 3 regulated outputs.
Interface
GPIO
Input Voltage
5V
Click board size
L (57.15 x 25.4 mm)
Pinout diagram
This table shows how the pinout on BATT-MAN click corresponds to the pinout on the
mikroBUS™ socket (the latter shown in the two middle columns).
Notes
Pin
Pin
Notes
Charging indicator
CHG
1
AN
PWM
16
NC
Chip enable
EN
2
RST
INT
15
FLT
NC
3
CS
RX
14
NC
NC
4
SCK
TX
13
NC
NC
5
MISO
SCL
12
NC
NC
6
MOSI
SDA
11
NC
NC
7
3.3V
5V
10
+5V
Power supply
GND
8
GND
GND
9
GND
Ground
Ground
Fault inidcator
BATT-MAN click electrical specifications
Description
Min
Typ
Max
Unit
3.3V current
950
1000
1500
mA
5V current
800
850
1200
mA
3.3V SB current
20
30
50
mA
Onboard settings and indicators
Label Name Default
Description
LD1
PWR
-
Power LED indicator
LD2
CHG
-
Charging LED indicator
SW1 EN Vout
OFF
Enables switching regulator output, up position OFF, down position ON
TB1
TB1
-
Screw terminal for connecting external load
TB2
TB2
-
Screw terminal for connecting external load
CN1
BATT
-
Li-Ion/Li-Po Battery connector
Software Support
We provide a library for BATT-MAN click on our LibStock page, as well as a demo application
(example), developed using MikroElektronika compilers. The demo can run on all the main
MikroElektronika development boards.
Library Description
This library contains a single function for BATT-MAN click control.
Key functions
void battman_setEnable(uint8_t state)- Enables or disables click board™ operation
Examples Description
The demo application is composed of three sections:
•
•
•
System Initialization - Initializes pin direction and logger utility.
Application Initialization - Initializes click driver.
Application Task (Code snippet) - Alternates between enabled and disabled state.
void applicationTask()
{
battman_setEnable(1);
mikrobus_logWrite("Click enabled.",_LOG_LINE);
Delay_ms(10000);
mikrobus_logWrite("Click disabled.",_LOG_LINE);
battman_setEnable(0);
Delay_ms(10000);
}
The full application code, and ready to use projects can be found on our LibStock page.
Other MikroElektronika libraries used in the example:
•
UART
Additional notes and information
Depending on the development board you are using, you may need USB UART click, USB
UART 2 click or RS232 click to connect to your PC, for development systems with no UART to
USB interface available on the board. The terminal available in all MikroElektronika compilers,
or any other terminal application of your choice, can be used to read the message.
Downloads
mikroBUS™ standard specifications
LTC3586 datasheet
BATT-MAN click - 2D and 3D files
BATT-MAN click schematic
LibStock: BATT-MAN click library
https://www.mikroe.com/ata6570-click 2-5-18
