LTC4416 LINER [Linear Technology], LTC4416 Datasheet - Page 8

• Manufacturer Part Number: LTC4416
• Description: 36V, Low Loss Dual PowerPath Controllers for Large PFETs
• Manufacturer: LINER [Linear Technology]

LTC4416/LTC4416-1
V1 is Greater Than V2 Operation
When V
a “soft-off mode”. This means that G1 will only provide
an I
current.
When V
mediately fully enabled, and G1 will become active imple-
menting the output current listed in Figure 1.
Channel 2 is fully enabled. If V
will implement all of the I
Channel 1 is Disabled
The LTC4416 is not designed to have channel 1 disabled
by grounding E1 and leaving E2 in an indeterminate state.
If this happens, the channel 2 PowerPath controller will
not have reverse turn-off capability. No electrical harm to
the LTC4416 will occur.
Channel 2 is Disabled
The LTC4416 is not designed to have channel 2 disabled
by connecting E2 high and leaving E1 in an indeterminate
state. If this happens, the channel 1 PowerPath controller
will not have reverse turn-off capability. No electrical harm
to the LTC4416 will occur.
OPERATIO
APPLICATIO S I FOR ATIO
LTC4416
The LTC4416 is designed to support three major ap-
plications. The first two applications assume that V1 is
the primary power source and V2 is the backup power
source. The first application is where the V1 power supply
is normally less than V2. The second application is where
the V1 power supply is normally greater than V2. The third
application addresses the load sharing case where both
V1 and V2 are relatively equal in value.
V1 is Less Than V2
Figure 2 illustrates the external resistor configuration for
this case.

G(SRC)
E1
E1
current instead of an I
is above the V
is below the V
U
U
REF
G2
REF
U
currents listed in Figure 1.
threshold, channel 1 is im-
threshold, channel 1 is in
V1
– V
G(SNK)
W
VS
< V
or an I
RTO
, channel 2
GFON(SNK)
U
Both Channels Disabled
When both channels of the LTC4416 are disabled, both
G1 and G2 currents are set to I
LTC4416-1 OPERATION
The LTC4416-1 is designed for overvoltage/undervoltage
protection or when either voltage path must be turned off
rapidly, regardless of the status of the other voltage input.
The LTC4416-1 does not implement the soft-off feature
implemented in the LTC4416. The E1 and E2 inactive will
force the I
Table 2 explains the operation of the E1 and E2 inputs.
The term “active” implies that I
the Gn pins regardless of the V
“enabled” implies that I
pins if and only if V
Table.2 LTC4416-1 Operational Modes
GND
E1
0
X
1
X
V1
V2
V1 = 10.8V (RESTORE)
E2
X
X
V2 = 14.4V
1
0
V1 = 9V (FAIL)
R2E
105k
G
Operation Mode
Undervoltage Protection
Overvoltage Protection
Channel 1 PowerPath
Channel 2 PowerPath
current of their respective channel to I
R2A
158k
R2C
24.9k
Vn
– V
G(OFF)
PRIMARY SUPPLY
E1
H1
GND
E2
H2
Figure 2
BACKUP SUPPLY
VS
LTC4416
< V
current is provide on the Gn
G(OFF)
G(SRC)
Vn
RTO
G1
G2
V1
V
V2
– V
S
.
I
Enabled
G(OFF)1
current is forced on
Active
.
VS
SUP75P03_07
SUP75P03_07
Q2
value. The term
Q1
Q3
Enabled
I
G(OFF)2
Active
G(OFF)
4416 F02
4416fa
V
S
.