Analog Devices DC1717B Demo Manual

DESCRIPTION
Demonstration circuit DC1717B uses the
arbitrate between three input supply rails, selecting the
highest priority, valid supply to power the load. The rail's
priority is defined by the input connection (V1-V3). Each
rail has overvoltage and undervoltage thresholds set by
external resistors. If the highest priority rail voltage falls
out of the defined window (overvoltage or undervoltage),
the rail with the next highest priority, which is valid, is
PERFORMANCE SUMMARY
SYMBOL PARAMETER
V1-V3, V V1 to V3, V
OUT OUT
ΔV Open (VS-VG) Clamp Voltage
G
ΔV Sourcing (VS-VG) Clamp Voltage
G(SOURCE)
ΔV Sinking (VS-VG) Clamp Voltage
G(SINK)
ΔV G1 to G3 Off (VS-VG) Threshold
G(OFF)
ΔV G1 to G3 Pull-Down Slew Rate
G(SLEW,ON)
ΔV G1 to G3 Pull-Up Slew Rate
G(SLEW,OFF)
I G1 to G3 Low Pull-Down Current
GATE(LOW)
V Reverse Voltage Threshold
REV
t Break-Before-Make Time
G(SWITCHOVER)
V VALID1 to VALID3 Output Low Voltage
VALID(OL)
t VALID1 to VALID3 Delay OFF from
PVALID(OFF)
OV/UV Fault
V SHDN Threshold Voltage
SHDN(THR)
V SHDN, EN Threshold Hysteresis
SHDN_EN(HYS)
I SHDN, EN Pull-Up Current
SHDN_EN
V OV1 to O3, UV1 to UV3 Comparator
OV_UV(THR)
Threshold
V OV1 to O3, UV1 to UV3 Comparator
OV_UV(HYS)
Hysteresis
t V1 to V3 Validation Time
VALID
V1 Operating Voltage of Channel V1
V2 Operating Voltage of Channel V2
V3 Operating voltage of Channel V3
I Load Current
LOAD
AVI Auxiliary Voltage Input
Prioritized PowerPath™ Controller
LTC 4417
®
Specifications are at T
CONDITIONS
Operating Supply Range
V
OUT
V
OUT
V
OUT
V1 = V2 = V3 = 2.8V, V
V
OUT
V
OUT
V
OUT
Measure (V1 to V3) – V
V
OUT
I = 1mA, (V1 to V3) = 2.5V, V
SHDN Rising
SHDN = EN = 0V
V
OUT
V
OUT
DEMO MANUAL DC1717B
to enabled and powers the load. Two or more LTC4417s
can be cascaded to provide switchover between more
than three rails.
Design files for this circuit board are available at
www.analog.com/DC1717B.
= 25°C
A
= 11V, G1 to G3 = Open
= 11V, I = –10µA
= 11V, I = 10µA
= 2.6V, G1 to G3 Rising Edge
OUT
= 11V, C = 10nF
GATE
= 11V, C = 10nF
GATE
= 2.6V, V1 to V3 = 2.8V, (G1 to G3) = ΔV
, V Falling
OUT OUT
= 11V, C = 10nF
GATE
= 0V
OUT
= 11V, OV1 to OV3 Rising, UV1 to UV3 Falling
= 11V
LTC4417
MIN TYP
2.5
5.4 6.2
5.8 6.6
4.5 5.2
0.12 0.35
4 9
7.5 13
+ 300mV 0.8 2
G
30 120
0.7 2
0.2
5 8
0.4 0.8
100
–0.5 –2
0.985 1
15 30
100 256
9.6 12
4 5
6.4 8
2
6
MAX UNITS
36 V
6.7 V
7 V
6 V
0.6 V
20 V/µs
22 V/µs
7 µA
200 mV
3 µs
0.55 V
13 µs
1.2 V
mV
–5 µA
1.015 V
45 mV
412 ms
14.4 V
6 V
9.6 V
A
24 V
Rev 0
1