Contactless power supply module

BWS Series

5

Bellnix

AC-DC Converter

BWS20170519_C01

3

インバータ回路内部

2

CN4

絶縁電源

+

制

御

IC

外付けＬＥＤ

・Inflow current:1mA min. 5mA max.

・

A 0Ω resistor is connected internally to RC_OUT_G(CN4-9 pin).

5－8． LED control circuit

A surface-mounted LED (part no.: LED1) used for

status indication is installed in the inverter circuit. For

indication pattern refer to chapter 5-9 Operation modes.

The CN4-3 pin of the inverter is synchronized with the

surface-mounted LED installed on the same board, and

can be used to control externally connected LED.

When using external LED, prepare separate isolated

power source. Connect the negative terminal of the

isolated power source to the pin CN4-2, connect the

positive terminal of the power source to anode of the LED,

and connect cathode of the LED to the CN4-3 pin.

In this case the maximum current flowing through the CN4-3 pin will be 9mA. Maximum voltage

that can be applied to the CN4-3 pin is 50V. When using external LED, make sure that these

maximum allowable voltage and current are not exceeded.

5-9. Operation modes

Inverter operation is controlled by microcontroller installed in the inverter of the power transmitting

module. There are three operation modes depending on the load conditions: continuous operation,

intermittent operation and protection operation.

5-9-1. Continuous operation: used when output load of the product is 55% or higher of the rated load

In this operation mode the module operates continuously while lithium ion battery is being

charged with constant current, and after switching to constant voltage charging until the charging

current lowers to the levels given below. Although affected by gap and displacement of

transmitting and receiving transformers, and environment surrounding the mounting position,

the following standard thresholds are used for switching to the intermittent operation mode.

・Minimal gap and displacement： about 55% of the rated load.

・Maximal gap and displacement： about 25% of the rated load

5-9-2． Intermittent operation: used when output load of the product lowers

This operation mode is used when it is assumed that lithium ion battery is being charged at

constant voltage and the charging current has decreased. Although affected by gap and

displacement of transmitting and receiving transformers, and environment surrounding the

mounting position, the following standard thresholds are used for switching to the intermittent

operation mode.

・Minimal gap and displacement: 55% or less of the rated load.

・Maximal gap and displacement: 25% or less of the rated load.

*After repeating the intermittent operation for 1 minute, output stops for 10 minutes. Operation

is restarted 10 minutes after stopping. The operation can also be restarting by switching the

ON/OFF control again.

Voltage of

RC-IN-+

to RC-IN-G

Inverter output

LED　output

1.5S

Internal connections

of the inverter circuit

External LED

Isolated

power source