ADUM5000 datasheet(13/16 Pages) AD

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Data Sheet

ADuM5000

Rev. B | Page 13 of 16

INCREASING AVAILABLE POWER

The ADuM5000 device is designed to work in combination with

other compatible isoPower devices. The RCOUT, RCIN, and RCSEL

pins allow the ADuM5000 to provide its PWM signal to another

device through the RCOUT pin acting as a master. It can also

receive a PWM signal from another device through its RCIN pin

and act as a slave to that control signal. The RCSEL pin chooses

whether the part acts as a master or slave device.

When the ADuM5000 is acting as a slave, its power is regulated

by the master device, allowing multiple isoPower parts to be

combined in parallel while sharing the load equally. When the

ADuM5000 is configured as a master or standalone unit, it

generates its own PWM feedback signal to regulate itself and

slave devices.

The ADuM5000 can function as a master, slave, or standalone

device. All devices in the ADuM5xxx and ADuM6xxx family

can function as standalone devices. Some of these devices also

function as master devices or slave devices, but not both (see

Table 14).

Table 15 shows how isoPower devices can provide many

combinations of data channel count and multiples of the

single unit power.

Table 14. Allowed Combinations of isoPower Parts

Part No.

Function

Master

Slave

Standalone

ADuM6000

Yes

ADuM620x

Yes

ADuM640x

Yes

ADuM5000

Yes

ADuM520x

Yes

ADuM5400

Yes

ADuM5401 to

ADuM5404

Yes

Another feature allowed by the RCSEL and RCIN control architecture

is the ability to completely shut down the oscillator in the dc-to-

dc converter. This places the part in a low power standby mode

and reduces the current draw to a fraction of a milliamp.

When the ADuM5000 is placed in slave mode by driving RCSEL

low, the oscillator is controlled by RCIN. If RCIN is held low, the

oscillator is shut down and the part is in low power standby

mode. With no oscillator driving power to the secondary side,

VISO turns off. This mode is useful for applications where an

isolated subsystem may be shut down to conserve power. To

reactivate the power module, drive RCSEL high; the power supply

resumes operation.

Table 15. Configurations for Power and Data Channels

Power Units

Number of Data Channels

0 Channels

2 Channels

4 Channels

1-Unit Power

ADuM6000 or ADuM5000 (standalone)

ADuM620x or ADuM520x (standalone)

ADuM5401, ADuM5402, ADuM5403,

ADuM5404, or ADuM640x (standalone)

2-Unit Power

ADuM6000 or ADuM5000 (master)

ADuM6000 or ADuM5000 (slave)

ADuM6000 or ADuM5000 (master)

ADuM620x or ADuM520x (slave)

ADuM5401, ADuM5402, ADuM5403,

ADuM5404 (master)

ADuM6000 or ADuM5000 (slave)

3-Unit Power

ADuM6000 or ADuM5000 (master)

ADuM6000 or ADuM5000 (slave)

ADuM620x or ADuM520x (slave)

ADuM6000 or ADuM5000 (slave)

ADuM620x or ADuM520x (slave)

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