Nordic nPM1100 EK User manual

nPM1100 EK Hardware
v0.8.0
User Guide
4477_012 / 2021-05-27

Contents
Revision history.................................. iii
1Introduction................................... 4
2Minimum requirements............................ 5
3Kit content.................................... 6
4Hardware description.............................. 7
4.1 Hardware figures .................................7
4.2 Block diagram .................................. 8
4.3 Power supply .................................. 8
4.4 LEDs ...................................... 9
4.5 Switches .................................... 9
4.5.1 Charge voltage termination .......................... 9
4.5.2 Charge current limit ............................. 10
4.5.3 Output voltage configuration ......................... 10
4.5.4 Buck regulator mode ............................. 11
4.5.5 VBUS current limit .............................. 11
4.6 Buttons .................................... 11
4.6.1 Ship mode activation .............................11
4.6.2 Ship mode disabling ............................. 12
4.7 Solder bridge configuration ............................ 12
4.8 NTC configuration ................................ 12
5Measuring current............................... 13
5.1 Preparing the nPM1100 EK ............................ 13
5.1.1 Preparing for VBUS current measurements ....................14
5.1.2 Preparing for VBAT current measurements .................... 14
5.1.3 Preparing for VOUTB current measurements ................... 14
5.2 Using an oscilloscope for current profile measurement ................ 15
5.3 Using an ampere meter for current measurements .................. 16
5.4 Using the Power Profiler Kit II for current measurements ................16
5.4.1 Measuring VBUS current ........................... 16
5.4.2 Measuring VBAT current ........................... 17
5.4.3 Measuring VOUTB current .......................... 18
Glossary ..................................... 20
Acronyms and abbreviations............................21
Recommended reading.............................. 22
Legal notices................................... 23
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Revision history
Date Description
2021-05-27 First release
4477_012 iii

1Introduction
The nPM1100 EK is a hardware platform used to evaluate the nPM1100 Power Management Integrated
Circuit (PMIC).
The key features of the Evaluation Kit (EK) are:
• nPM1100 EK PMIC
• Lithium-ion/lithium-polymer USB battery charger
• High efficiency step-down buck regulator
• Power supply from USB, pins, or battery
• DIP Switches to set:
• Step-down regulator output voltage
• Charge current
• Charge termination voltage
• USB current limit
• BUCK operating mode
• Buttons for entering/leaving Ship mode
• Headers for connecting to configuration pins
• Pins for measuring current flow
For access to hardware schematics and layout files, see nPM1100 EK product page.
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2Minimum requirements
Before you start, check that you have the required hardware.
Hardware requirements
• Power supply, USB or connector
• Micro-USB 2.0 cable
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3Kit content
The nPM1100 EK consists of hardware, reference design files, and documentation.
The EK only comes with the board. You need to provide your own Micro-USB cable.
Figure 1: nPM1100 EK
Hardware files
The hardware design files including schematics, PCB layout files, bill of materials, and Gerber files for the
nPM1100 EK are available on the nPM1100 EK product page.
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4Hardware description
The nPM1100 EK allows full flexibility for configuration of the nPM1100 PMIC without having to make
any hardware modifications. The EK supports Primary Detection of the USB port type based on the USB
Battery Charging Specification.
Alternatively, the current limitation can be controlled manually by a switch. The current limitation switch
can only override from a 100–500 mA limit for a Standard Downstream Port (SDP) detection. It cannot
override or limit a 500 mA Dedicated Charging Port (DCP) down to 100 mA.
4.1 Hardware figures
The nPM1100 EK hardware drawings show both sides of the EK.
Figure 2: nPM1100 EK front view
Figure 3: nPM1100 EK back view
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Hardware description
4.2 Block diagram
The block diagram illustrates the nPM1100 EK functional architecture.
VSYS
ICHG
MODE
ISET
VOUTBSET
SHPACT
SHPHLD
nPM1100
VOUTB
ERR
CHG
Battery
USB
VTERM NTC
Figure 4: nPM1100 EK block diagram
4.3 Power supply
The nPM1100 EK has a flexible and configurable power supply system to allow testing with different power
sources and to facilitate accurate power measurements.
The power options are:
• USB connector J2 (5.0 V)
• VBUS P8 pin 1 (4.5–6.7 V)
• Connectors for Li-ion/Li-poly batteries P2, P3, P6 or, P4 pin 1 (2.5–4.2 V)
Note: Use only one connector at a time.
Use the USB connector or the VBUS pin for powering the system and delivering power when charging. The
nPM1100 PMIC will pull current from the battery if no external power source is connected to J2/P4.
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Hardware description
Figure 5: Power supply options
4.4 LEDs
The nPM1100 EK has two LEDs for visualizing the status of the nPM1100 battery charger. Both can be
disconnected for power consumption measurements.
VSYS
ERR
CHG
SB1 LD1 L0603G
LD2 L0603GSB2
VSYS
Figure 6: LED schematic
Part Function Solder bridge
LD1 Error indication, ERR SB1, cut to disconnect LD1
LD2 Charge active indication, CHG SB2, cut to disconnect LD2
Table 1: LED connection
4.5 Switches
The nPM1100 EK has several switches to configure the nPM1100 device. All switches have series resistors
to allow the onboard switches to be overridden by external input.
4.5.1 Charge voltage termination
SW4 controls the charge voltage termination.
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Hardware description
Switch Function Parameter controlled
SW4 Charge voltage termination VTERMSET
Table 2: Charge voltage termination parameters
4.5.2 Charge current limit
SW7 controls the maximum charge current limit.
Switch Function Parameter controlled
SW7 Charge current limit ICHG
Table 3: Charge current limit parameters
SW7 is a 5-pole dip switch that can select the five defined current limits in the following table. This is
done by setting the resistance from ICHG to GND. Closing multiple switches simultaneously decreases
the resistance and increases the current limit. The user configured current limit can be set by leaving all
switches open and selecting an appropriate R12 value.
ICHG Charge current R_ICHG
1 400 mA 0 Ω
2 250 mA 1.0 kΩ
3 150 mA 2.7 kΩ
4 50 mA 12 kΩ
5 20 mA 27 kΩ
Table 4: SW7 current limits
4.5.3 Output voltage configuration
SW6 controls the nPM1100 step-down regulator output voltage.
Switch Function Parameter controlled
SW6A VOUTBSET1
SW6B
Output Voltage configuration
VOUTBSET0
Table 5: Output voltage configuration parameters
SW6 is a 2-pole dip switch used to support four defined output voltage levels.
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