6
LT1641-1/LT1641-2
164112fc
TEST CIRCUIT
V
CC
SENSE
GATE
TIMER
ON
FB
PWRGD
GND
5k
10nF
24V
1641-1 F01
V
+
5V
+
–
Figure 1
BLOCK DIAGRA
W
–
+
+
–
–
+
–
+
80µA
V
P
V
P
LOGIC
1.233V
0.5V
12mV ~ 47mV
UNDERVOLTAGE LOCKOUT
8.3V
V
CC
GND
0.5V
1.233V
–
+
–
+
1.233V
PWRGD
TIMER
1641-1 BD
V
CC
SENSE
V
P
GEN
FB
ON
3µA
GATE
+
–
CHARGE
PUMP
AND
GATE
DRIVER
REF GEN
