OEM Battery Pack

DS RFBATTPACK-a

Applications

• General Purpose Battery Pack

• OEM Battery Solution

• Contactless Rechargeable battery Pack

Features

• Lithium-ion Polymer Battery

• 3.7V 980mAH

• Charge Controller Board

• QI Standard Wireless Charging Coil

• Compact Size 21 x 35 x 7mm

• LED Indication of:

• Charging

• Fully Charged (End of Charge)

• Power

• All signals & Power output via std

pin Header

• Thermal Overload Protection

• No Adjustable Components

• Compact Unit ready to deploy

Description

A self contained Battery pack which can be used for many different applications.

The kit includes a Lithium Polymer Rechargeable battery combined with QI Standard Charg-

ing receiver and PCB Controller Assembly. This provides a self contained contactless re-

charged battery pack for many OEM applications.

LED indication provides the status of Charge with the same interface signals available to a

host microcontroller.

Self Contained Lithium Battery with Wireless Charging

Ordering Information

Part No Description

BATTPACK-980 Self Contained Battery, Controller and Charging Rx Coil

WCHARGEPAD-3COIL Wireless Charging Pad 3 Coil with USB cable

Wireless Recharge Battery Pack

DS RFBATTPACK-a Page 2

What’s Included

Charging Coil

This is a QI standard Charging receiver

using TI controller.

Li Ion Battery

3.7V, 980mAH Battery with high Tem-

perature Shutdown

Controller

Circuitboard Assembly Controls the

Charging of the Battery.

Output Voltage

To Load /

Application

Circuit

Charge Controller

Wireless Charging

Receiver

RFCHARGER Block Diagram

Li Ion Battery

uUSB

Molex

Controller Battery Charging Coil

Operation

The Charge Controller board has direct connection to the charging coil and to the battery, it

automatically charges the battery when the charging coil is energised.

The Charge controller monitors the battery charging and provides CMOS/TTL output signals

and LED indication of charge status.

Output connection to end application /load circuit is available at all times via CON1 and CON3.

Although the QI standard changing coil is supplied, the Charge controller can accept power

from any standard uUSB connection via the uUSB input connector or a direct 5V supply.

WARNING : This product is a Lithium polymer battery with Charge control. It is not a DIS-

CHARGE Controller. The Charge Controller does not control discharge rate or level.

The Lithium polymer battery must not be discharged below 2.75V as recommended by the

Battery manufacturer. (for max performance we recommend maintaining the Voltage above 3V

Wireless Recharge Battery Pack

DS RFBATTPACK-a Page 3

Application Notes

The Charging pad has a charging side (with the coil printed) this is the side that must be clos-

est to the Wireless Charger (transmitter).

Charging will start as soon as the charging coil (receiver) is correctly positioned and the

transmitter has identified the Wireless receiver charging coil.

The charging current is limited to 500mA so any QI standard charger rated 5W or more will

provide adequate charge, full charge from empty is approx 2-3 hours.

As with all induction the efficiency is dependant on the distance between the two coils. Ideally

<5mm and with no metal objects between them.

This product is ideally suited to being adhered to the inside of an enclosure as a self con-

tained recharging battery pack providing a power source for the product.

An example of this is below where the product is fixed within the RF Solutions Radio Transmit-

ter ,thus enabling a totally sealed finished product….

RF BATTPACK-980 & WCHARGEPAD-OVAL

Wireless Recharge Battery Pack

DS RFBATTPACK-a Page 4

Controller Operation

CON2

1mm PTH Hole & uUSBB

Connects to Charging Coil

CON 4 1mm PTH Hole &

Battery Connector

CON3

CON1

LED s

Charging

End of Charge

Charge Power

Present

CON1 and CON3

These connectors are duplicated so that when mounting on a motherboard the controller as-

sembly is mechanically seated.

Connectors are Standard 2 x 3 way pin header receptacles part Samtec CLT-103-02-L-D.

They accept standard 0.5mm square pins 2mm pitch.

Pin Name Direction Description

1 BATT+ Out Output from Battery to application Load

2 PSU CHG Out CMOS/TTL output active Low indicates Battery is Charging

3 CHARGE V+ In Input voltage (parallel to the Charging Coil) which can be used as a

charging alternative signal

4 GND In/Out Ground

5 PSU_EOC Out CMOS/TTL output active Low indicates End of Charge cycle

6 PSU_GD Out CMOS/TTL output active Low indicates Incoming Charge Power is

good, charging is Viable

CON2

Input charging supply voltage to the controller board.

Is a standard uUSB type B receptacle, and is also duplicated as 2 x 1mm DIA plated Thro PCB

Pin Name Direction Description

1 VBUS+5V In Input charging Supply

2,3,4 N/C Not used

5 GND In Ground

CON4

Direct Battery Connection.

MOLEX type 22-05-7035, and is also duplicated as 3 x 1mm DIA plated Thro PCB Holes

Pin Name Direction Description

1 L+ IN/Out Battery +Ve Connection

2 L Sense In Battery NTC Sense input

3 L- IN/Out Ground

Wireless Recharge Battery Pack

DS RFBATTPACK-a Page 5

Technical specifications

Wireless Charging Receiver Standard QI

Controller IC: TI 51003B

Dimensions: 94 x 48 x 1.3mm with 27mm tail (inc USB con)

Weight : 5grams

Battery Specification Part no : LP-523450-1S-3

Dimensions: 34 x 51 x 5 mm (not including lead)

Operating Temp: -10 to +50o Celsius.

Weight : 20grams

Nominal Capacity 980mAH

• Do not over-discharge the battery. Over-discharging can damage the performance of the battery. It

should be noted that the cell/battery would be at an over-discharged state by its self-discharge char-

acteristics in case the cell is not used for long time. In order to prevent over-discharging, the cell/

battery shall be charged periodically to maintain between 3.7V and 4.1V

• Please refer to Separate documents LP-523450 Datasheet and LP-523450 Safety sheet

Electrical Characteristics Min Typical Max Units

Output Voltage 5 V

Supply Current 1000 mA

Thermal Shutdown 130 150 170 0C

Distance from Transmitter Coil to charge 2 10 mm

Electrical Characteristics Min Typical Max Units

Nominal Voltage 3.7 V

Charging Voltage 4.195 4.2 4.25 V

Max Continuous Discharge Current 1860 mA

Discharge Cut-off Voltage** 2.75 V

Operating Temperature

Discharging

Charging

-20

0

+60

+45

0C

Storage in a 50% charged State

-20 to +800C

-20 to +600C

-20 to +450C

-20 to +250C

10

30

90

365

Days

Capacity Retention Characteristics

After 300 Cycles

After 500 Cycles

80

% Rated

Capacity

Internal Impedance 95 130 mOhms

Wireless Recharge Battery Pack

Disclaimer:

Whilst the information in this document is believed to be correct at the time of issue, RF Solutions Ltd does not accept any liability whatsoever for its accuracy, adequacy or

completeness. No express or implied warranty or representation is given relating to the information contained in this document. RF Solutions Ltd reserves the right to make

changes and improvements to the product(s) described herein without notice. Buyers and other users should determine for themselves the suitability of any such information or

products for their own particular requirements or specification(s). RF Solutions Ltd shall not be liable for any loss or damage caused as a result of user’s own determination of

how to deploy or use R F Solutions Ltd’s products. Use of RF Solutions Ltd products or components in life support and/or safety applications is not authorised except with ex-

press written approval. No licences are created, implicitly or otherwise, under any of RF Solutions Ltd’s intellectual property rights. Liability for loss or damage resulting or

caused by reliance on the information contained herein or from the use of the product (including liability resulting from

negligence or where RF Solutions Ltd was aware of the possibility of such loss or damage arising) is excluded. This will not operate to limit or restrict RF Solutions Ltd’s liability

for death or

personal injury resulting from its negligence.

RF Solutions Ltd. Recycling Notice

Meets the following EC Directives:

DO NOT

Discard with normal waste, please recycle.

ROHS Directive 2002/95/EC

Specifies certain limits for hazardous substances.

WEEE Directive 2002/96/EC

Waste electrical & electronic equipment. This product must be disposed of through a licensed WEEE collection point. RF Solutions Ltd.,

fulfills its WEEE obligations by membership of an approved compliance scheme.

Waste Batteries and Accumulators

Directive 2006/66/EC

Where batteries are fitted, before recycling the

product, the batteries must be removed and

disposed of at a licensed collection point.

Environment Agency producer registration num-

ber: WEE/JB0104WV.

Important European compliance information

This RF Solutions product meets the essential requirements of the European Radio Equipment Directive

2014/53/EU and has been tested to European Harmonised Standards and CE marked accordingly. A copy of the

EU Declaration of Conformity can be located on the RF Solutions Website, www.rfsolutions.co.uk/certification-

Technical specifications

Charge Controller Standard QI

Controller IC: Microchip MCP7383

Dimensions: 21 x 35 7mm

*The microUSB input connector provides the incoming power for the circuit as well as charging power for

the battery. This has been tested for operation with the receiver charge coil supplied although can be con-

nected to any USB source. It is the users responsibility to ensure that whatever is connected conforms to

the USB standard and ensure that the voltage is within the USB standard.

** note that even when shutdown, the small quiescent current is enough to make the super efficient LED

glow very faintly!

Electrical Characteristics Min Typical Max Units

Input Voltage * 3.75 5 6 V

Supply Current (to power this board)

Charging

Charge Complete

Shutdown**

2000

150

50

A

Output Voltage 4.2 V

Output Current (charging current to battery) 500mA mA

Operating Temperature -40 +85 0C