ltc4221 Linear Technology Corporation, ltc4221 Datasheet - Page 10

• Manufacturer Part Number: ltc4221
• Description: Dual Hot Swap Controller/power Sequencer With Dual Speed, Dual Level Fault Protection
• Manufacturer: Linear Technology Corporation

BLOCK DIAGRA
LTC4221
10
SENSE1
SENSE2
FILTER
FAULT 7
V
V
ON1
ON2
FB1 5
FB2 12
CC1
CC2
16
15
14
1
8
2
3
OSCILLATOR
V
V
V
V
V
V
CC1
CC1
CC1
CC1
CC2
CC2
+
–
+
–
+
–
+
–
105μA
1.8μA
3.8μA
V
V
9mV TO 25mV
100mV
9mV TO 25mV
100mV
0.617V
0.617V
W
CC1
CC1
CHARGE
CHARGE
PUMP 1
PUMP 2
COMPARATOR
COMPARATOR
+
–
+
–
0.816V
0.822V
0.822V
0.821V
0.821V
FB1
FB2
1.24V
0.4V
CPO1
CPO2
+
–
+
–
+
–
–
+
–
+
+
–
+
–
+
–
+
–
+
–
COMPARATOR 1
COMPARATOR 1
COMPARATOR 2
COMPARATOR 2
COMPARATOR
COMPARATOR
COMPARATOR
COMPARATOR
COMPARATOR
COMPARATOR
FILTER
FAULT
SLOW
SLOW
FAST
FAST
ON1
ON2
OV1
OV2
FAULT_LO
SLOWHI1
SLOWHI2
FASTHI1
FASTHI2
V
V
CC1
CC2
FTRHI
CHANNEL 1
CHANNEL 2
CONTROL
CONTROL
CONTROL
SYSTEM
LOGIC
LOGIC
LOGIC
UVLO
COMPARATOR
COMPARATOR
TMRHI
TMRLO
CUR_LIMIT2
FPD2
GATELO2
CUR_LIMIT1
FPD1
GATELO1
COMPARATOR
COMPARATOR
TMRLO
TMRHI
GATELO1
GATELO2
12V
12V
V
V
V
CC1
CC2
CC1
+
–
+
–
20μA
CPO1
CPO2
+
–
+
–
1.234V
0.4V
9.5μA
V
9.5μA
0.4V
0.4V
CC1
1.9μA
100μA
100μA
CHANNEL TWO
CHANNEL ONE
26V
26V
10
13
11
9
4
6
4221 BD
TIMER
GND
GATE1
PWRGD1
GATE2
PWRGD2
4221fa