ISL6144_14 Datasheet, PDF (4/30 Pages) Intersil Corporation – High Voltage ORing MOSFET Controller

Simplified Block Diagram
SOURCE 2
9V TO 75V
ISL6144
D₂*
F2**
SOURCE 1
9V TO 75V
VIN
C₁
5.5V
HVREF
FAULT
C₁
VIN GATE VOUT ^{R1 C2}
HVREF COMP
ISL6144
FAULT_GND VSET
D₁*
R₂
* D₁, D₂ PARASITIC DIODES
**F1, F2 FUSES COULD ALSO BE PLACED
ON THE INPUT SIDE BEFORE THE VIN PIN. THIS
PLACEMENT DEPENDS ON POWER SYSTEM
ARCHITECTURE.
GATE LOGIC AND
CHARGE PUMP
GATE
F1**
VOUT
LOAD
LEVEL
SHIFT
DELAY
100µs
2A* 5mA
FAULT
DETECTION
-
+
REG
AMPLIFIER
-
+
HS
COMP
20mV
-+
HIGH
VOLTAGE
PASS
AND
CLAMPING
5.3V
0.1mA
COMP
VSET
-
+
UV
COMP
0.6V
BIAS
AND
REF
R₁ C₂
R₂
1.5mA
GND
1.5mA
0.2mA
4
FN9131.7
October 6, 2011