EnerChip EH CBC5300

©2009 Cymbet Corporation • Tel: +1-763-633-1780 • www.cymbet.com

DS-72-06 Rev06

Page 3 of 11

Preliminary

24-Pin DIP Module

PGND

GATE

CHARGE

NPP

NPP

NPP

NPP

SIGRTN

UVLO SEL

GND

NPP

NPP

NPP

NPP

BATOFF

BATTEST

EC1GND

EC2GND

1

2

3

4

6

7

8

5

9

10

11

12

24

23

22

21

19

18

17

20

16

15

14

13

CBC5300 Dimensions

Attribute

Size

width

0.7 in [17.18mm]

length

1.2in [30.48mm]

height

0.9in [5.00mm]

Connecting the CBC5300 to the System

The CBC5300 board has two control lines that can be connected to a microcontroller (MCU) for the purpose of

conserving available energy, using incoming power efficiently, and extending EnerChip battery life. The table

below describes the functionality of the connector pins.

V

It provides power to the system according to the Operating Characteristics table shown below.

V

power to a load.

BATOFF is typically controlled by a microcontroller I/O line. When driven high, the on-board EnerChips will

•

be disconnected from the charging source of the CBC5300. This feature allows all available power to be

delivered to the load rather than to charging the EnerChips, a useful mode when limited transducer power

is available or when higher operating current is required from the system. When BATOFF is driven low, the

interaction between the charging source and the CBC5300 behaves normally. In other words, when BATOFF

is low the EnerChips will always be charging when sufficient input power is available.

CHARGE is an output signal from the CBC5300 that will be forced low under one of two conditions:

•

When transducer output power is very low, a low level on CHARGE indicates that the

»

EnerChips have been charged.

CHARGE will also be driven low when transducer output power is more than sufficient to operate

»

the boost converter and charge the EnerChips at peak rate, regardless of the state of charge of the

EnerChips. Programming an MCU timer to allow enough charging time to elapse after the assertion

of CHARGE will ensure that the EnerChips are fully charged before using them to deliver power to the

system. The advantage is that the system is then aware of the minimum reservoir of energy available in

the event transducer power goes to zero.