Datasheet

LTC4416/LTC4416-1
6
4416fa
BLOCK DIAGRA
W
V
REF
E2
4
V2
7
–
+
V
REF
E1
2
GND
3
V
S
8
V1
9
–
+
A2
C2
RAIL2
RAIL1
SECOND
ANALOG
CONTROLLER
BAND-GAP
REFERENCE
I
G(SRC)
I
G(OFF)
I
G2
8.5V
G2
H2
I
G(SNK)
I
GFON(SNK)
6
A1
FIRST
ANALOG
CONTROLLER
I
G(SRC)
I
G(OFF)
8.5V
G1
I
G(SNK)
V
REF
RAILBG
I
GFON(SNK)
10
4416 BD
5
H1
1
EN2
EN2
EN1
EN1
EN2
EN1
C1
I
G1
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
power from the higher voltage of V1 and V
S
. The internal
rail2 derives its power from the higher voltage of V2 and
V
S
. RAILBG derives its power from the highest voltage of
V1, V2, and V
S
. All three sections share a common ground
connected to the GND pin.
OPERATIO
U
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