Nexperia NBM5100 Manuel utilisateur
Nexperia UM90022
NBM5100; NBM7100 Evaluation board module
1. Introduction
The NBM5100x and NBM7100x are battery booster integrated circuits intended to expand the
lifetime and current capability of a coin cell battery like CR2032 and Lithium Thionyl batteries.
This manual gives a quick start of the NBM5100x and NBM7100x evaluation boards usage
together with the PC application or standalone.
The NBM5100x, NBM7100x evaluation board is fully assembled, containing all necessary
components to evaluate the performance and behavior of these battery boosters.
In total 4 variants of the evaluation board are available:
Table 1. Evaluation board variants
Evaluation
board variant
Bus interface Auto start
mode
Storage
Cap Charge
Balance
Function
Max Storage
Cap Voltage
Max Load
Current
NBM7100A I²C + - 11 V 200 mA
NBM5100A I²C + + 5.5 V 150 mA
NBM7100B SPI - - 11 V 200 mA
NBM5100B SPI - + 5.5 V 150 mA
All variants use the same PCB design and expose a USB to SPI/USB to I²C interface to allow
control of the Battery booster from a PC application.
2. Hardware description
The Evaluation Board enables evaluation of the Battery Booster products by controlling them from
a PC or connection to a board under development. The NBM5100x, NBM7100x evaluation kit is
fully assembled, containing apart from a CR2032 battery cell all necessary components to evaluate
the performance and behavior of the battery boosters before applying them in an application. The
top area of the PCB contains an USB to I²C and USB to SPI converter and a level shifter circuit for
controlling the Evaluation board with a PC GUI application. The following sections give a detailed
overview of the module and available test pins for observing the behavior.
2.1. Storage capacitor
By default, one storage capacitor is mounted for the NBM7100x series. For the NBM5100x two
(balanced) super capacitors are mounted in series. The size of these capacitors depends on the
amount of energy needed to supply the load. For demonstration purposes 1000 µF capacitors
are placed on the NBM7100x board and 470 mF for the NBM5100x board. Both boards offer the
possibility to mount leaded (super-) capacitors. It is also possible to connect a custom storage
capacitor to connector J6.
UM90022 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2023. All rights reserved
user manual Rev. 1 — 11 July 2023 2 / 21
Nexperia UM90022
NBM5100; NBM7100 Evaluation board module
2.2. Breakout board
Fig. 1. Breakout DIL converter board
The Evaluation board also includes a DIL converter board, which can be broken from the Main
PCB. Removing it from the main board will not impact the operation of it, as the board is electrically
not connected to it. This enables an easy evaluation of the product in an application prototype or
on a breadboard. An inductor was not included on the board and has to be connected externally to
allow evaluation of different inductors. The Pin numbers on the TOP side silkscreen directly map to
the pin numbers of the battery booster IC.
2.3. Jumper description
Fig. 2. Top view
Fig. 3. Bottom view
UM90022 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2023. All rights reserved
user manual Rev. 1 — 11 July 2023 3 / 21
Nexperia UM90022
NBM5100; NBM7100 Evaluation board module
Table 2. Evaluation board variants
Jumper
name
PCB
side
Position Description
1-2 (Left) Selects 7-bit I²C address 0x2e
2-3 (Right) Selects 7-bit I²C address 0x2f
JP1 Top
Open Mandatory position for NBM5100B and NBM7100B (SPI variants)
1-2 (top) Selects PC (FTDI) to drive the Load matrix.JP2 Top
2-3 (bot) Selects NBM RDY signal to drive the Load matrix.
Closed Connects the Battery positive pole and the external power supply
input to the supply input to Battery supply of NBM.
JP3 Top
Open External J2 supply input is not connected.
JP4 Bottom Closed Mandatory position to ground TST pin. Don’t open this jumper.
JP5 Top Open Disconnect Balance pin from capacitors.
Closed Connect Balance pin to center pin of series capacitors. Mandatory
for NBM5100A & NBM5100B board in their default configuration.
JP6 Top Open Don’t bypass low side capacitor. This is required for NBM5100A /
NBM5100B boards which have 2 capacitors in series.
Closed Mandatory position for NBM7100A and NBM7100B variants to
connect the negative pin of the storage capacitor to ground.
Open Disconnect on board capacitor.JP7 Top
Closed Connect on board storage capacitor(s) to CAP pin of NBM.
The intention of this pin it to give the ability to measure the
charging current.
JP8 Top Close Default position. Connects the on board inductor to NBM. The
Jumper can be used to measure the coil current. Default should
be closed, when removed the IC will not operate correctly.
Open Disconnect VDHs (sense) line from VDH output.JP9 Bottom
Close Default position. Connects VDHs to VDH output.
JP10 Top Open Connects VDH output of NBM to connector J7 and can be used to
measure the load current.
Close Disconnects VDH output from JP7. Useful to disconnect all loads
from Battery booster.
P12 Top Option to connect an external load which can be controlled over
the Load Matrix and on-board FET. Remove R24 to use this
feature, in case the load is high ohmic.
Pin header JP2 and J9 (Load Matrix)
The Load Matrix is a circuit (see Fig. 4) to simulate load current pulses for evaluation purposes.
Multiple loads in form of resistors are present in the load matrix. An additional LED is present to
show a visual representation of a capacitor loading. The loads are switched with Transistors. Using
a Jumper bank the source of the load signal, but also the load current can be set.
UM90022 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2023. All rights reserved
user manual Rev. 1 — 11 July 2023 4 / 21
Nexperia UM90022
NBM5100; NBM7100 Evaluation board module
Fig. 4. Load matrix circuit
As visible from above picture the center pin row of the 6x3 pin header connects to the FET gate
pins for load actuation. The left side connects to SMB connector J8 for external load triggering.
The right side connects depending on Jumper JP2 setting either to the FTDI for actuation of a load
pulse from the PC GUI application (future GUI extension, JP2 position 1-2) or to the NBM RDY pin
(JP2 position 2-3).
Fig. 5. Load matrix Jumper pins
Multiple jumpers can be placed at the same time to add up the individual currents.
UM90022 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2023. All rights reserved
user manual Rev. 1 — 11 July 2023 5 / 21
Nexperia UM90022
NBM5100; NBM7100 Evaluation board module
Table 3. Evaluation board variants
Row
(enumerated from top to bottom)
Approximate current
(VDP = 3.6 V)
Comment
1 1 mA -
2 10 mA -
3 20 mA -
4 50 mA -
5 100 mA -
6 200 mA This selection supplies a high
power LED
Example jumper placement to select 200 mA LED as current sink driven by the NBM ready signal
is shown in Fig. 6.
Fig. 6. Jumper placement to select 200 mA LED
Delivery state jumper settings
When the boards get delivered, they use different jumper settings. Below table summarizes the
default jumper setting.
Table 4. Delivery state jumper settings
Jumper NBM5100A
Default position
NBM5100B
Default position
NBM7100A
Default position
NBM7100B
Default position
JP1 0x2E open 0x2E open
JP2 2-3 2-3 2-3 2-3
JP3 closed closed closed closed
JP4 closed closed closed closed
JP5 closed closed open open
JP6 open open closed closed
JP7 closed closed closed closed
JP8 closed closed closed closed
JP9 closed closed closed closed
JP10 closed closed closed closed
JP12 open open open open
UM90022 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2023. All rights reserved
user manual Rev. 1 — 11 July 2023 6 / 21
Nexperia UM90022
NBM5100; NBM7100 Evaluation board module
2.4. Connector description
Fig. 7. Connector description
Pin header J1 (Digital TP)
This jumper block makes all digital IO signals available. Depending on the Battery booster type, the
pins have different usages.
Pin header J4 (SPI)
Table 5. Pin header J4 (SPI)
NBM5100A
NBM7100A
NBM5100B
NBM7100B
NBM5100A
NBM7100A
NBM5100B
NBM7100B
SDI = START pin
for auto mode
SDI = SPI MOSI
pin
GND GND
CSN = I²C
address select
CSN = SPI chip
select pin
GND GND
RDY = ready signal (output) GND GND
SDA = I²C data SDA = SPI MISO GND GND
SCL = I²C clock SCL = SPI SCLK GND GND
UM90022 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2023. All rights reserved
user manual Rev. 1 — 11 July 2023 7 / 21
Nexperia UM90022
NBM5100; NBM7100 Evaluation board module
Pin header J3 (I²C)
Table 6. Pin header J3 (I²C)
NBM5100A
NBM7100A
NBM5100B
NBM7100B
GND
SDA = I²C data SDA = SPI MISO
VDP = VDP voltage output from NBM
(the intention is to provide an IO voltage level reference)
SCL = I²C clock SCL = SPI SCLK
Pin Header J7 (Output)
Table 7. Pin Header J7 (Output)
NBM5100A
NBM7100A
NBM5100B
NBM7100B
OUT = VDH output voltage from NBM. (ensure jumper JP10 is
placed)
GND
VDHs = VDH sense signal to NBM. Default-wise it is connected
to the OUT pin using solder-jumper JP9
Pin Header J6 (External capacitor)
Use this pin header to connect an external capacitor. An external capacitor can be used in parallel
to the mounted one. In case only an external capacitor should be used, it is required to desolder
the mounted capacitor.
Table 8. Pin Header J6 (External capacitor)
NBM5100A
NBM7100A
NBM5100B
NBM7100B
- = GND
+ = Positive capacitor terminal
SMB connector J8 (Load)
The Load connector can be used to connect an external function generator (or microcontroller) to
create a timed load pulse for product evaluation. The center pin of the connector connects to the
left side pins of the J9 load selector pin header. The input impedance is high-ohmic.
UM90022 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2023. All rights reserved
user manual Rev. 1 — 11 July 2023 8 / 21
Nexperia UM90022
NBM5100; NBM7100 Evaluation board module
Table 9. SMB connector J8 (Load)
NBM5100A
NBM7100A
NBM5100B
NBM7100B
SMB male connector
SMB connector J5 (Start)
The Start connector can be used to connect an external function generator to generate a Start
pulse to the battery booster IC (evaluation of autonomous mode). The input impedance is 100 kΩ.
Table 10. SMB connector J5 (Start)
NBM5100A
NBM7100A
NBM5100B
NBM7100B
SMB male connector
UM90022 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2023. All rights reserved
user manual Rev. 1 — 11 July 2023 9 / 21
Nexperia UM90022
NBM5100; NBM7100 Evaluation board module
3. Test points
Many test points are provided to observe waveforms or voltage levels of the Battery booster. A
description of the test point location and connection is listed below.
Fig. 8. Test points
Table 11. Pin header J4 (SPI)
Test pin name Connected to Description
TP1 External Supply + pin Measure point for input supply voltage
TP2 GND
TP3 GND Ground bar. Use to connect an oscilloscope probe
ground lead.
TP4 VBT VBT voltage going to VBT pin of NBM.
TP5 TST Do not use.
TP6 BAL Balance pin measurement point. Useful for NBM5100 to
measure capacitor voltage of each capacitor.
TP7 CAP Capacitor positive terminal, connected to CAP pin of
NBM.
TP8 VDP Connected to VDP pin of NBM.
TP9 LX1 LX1 inductor pin.
TP10 LX2 LX2 inductor pin.
TP11 Pin 2: VDH
Pin 1: GND
Measurement point for VDH output in case Jumper J10
is open.
TP12 VDHs VDH Sense input. In case solder Jumper JP9 is opened,
it can be used to inject an externally supplied sense
signal.
TP13 GND Ground bar. Use to connect an oscilloscope probe
ground lead
UM90022 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2023. All rights reserved
user manual Rev. 1 — 11 July 2023 10 / 21
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