LTC4416/LTC4416-1



4416fa

BLOCK DIAGRA

E2

4

V2

7

–

+

E1

2

GND

3

8

V1

9

–

+

A2

C2

RAIL2

RAIL1

SECOND

ANALOG

CONTROLLER

BAND-GAP

REFERENCE

IG(SRC)

IG(OFF)

IG2

8.5V

G2

H2

IG(SNK)

IGFON(SNK)

6

A1

FIRST

ANALOG

CONTROLLER

IG(SRC)

IG(OFF)

8.5V

G1

IG(SNK)

VREF

RAILBG

IGFON(SNK)

10

4416 BD

5

H1

1

EN2

EN2

EN1

EN1

EN2

EN1

C1

IG1

Operation can best be understood by referring to the

Block Diagram which illustrates the internal circuit blocks.

The LTC4416/LTC4416-1 are divided into three sections,

namely:

1. The channel 1 controller consisting of A1, C1, the “first

analog contoller,” the G1 drivers and the H1 output

driver.

2. The band-gap reference

3. The channel 2 controller consisting of A2, C2, the

“second analog controller,” the G2 drivers and the H2

output driver.

Each of the three sections has its own derived internal

power supply referred to as a rail. RAIL1 provides power

to the channel 1 controller. RAIL2 provides power to the

channel 2 controller. The internal RAILBG provides power

to the band-gap reference. The internal rail1 derives its

rail2 derives its power from the higher voltage of V2 and

connected to the GND pin.

OPERATIO