Datasheet
LT3486
7
3486fe
BLOCK DIAGRAM
–
+
–
+
–
+
+
EA
EN2EN1
EA
PWM
COMP
R
SNS1
R
SNS2
OSC
DRIVER
SW2
0.2V
20k
20k
V
C1
CONVERTER 2
CONTROL
0.2V
80k80k
SHDN
SHDN REF FB2
15 11
CTRL2
1710
PWM2
EXPOSED
PAD
9
CTRL1PWM1 FB1
138 7 6
–
+
–
+
++
+
START-UP
CONTROL
REF 1.25V
PWM
LOGIC
16
V
IN
2
R
T
4
3486 F01
–
+
OSC
EN1
SW1
CONVERTER1 CONVERTER2
3
1
5
OVP1
OVP2
OV2
EN2
OV1
OV1 OV2
PWM
LOGIC
OSC
RAMP
GEN
OSC
OVERVOLT
DETECTION
14
Q1 Q2
A2
A1 A1
A2
A3
PWM
COMP
A3
CONVERTER1
CONTROL
V
C2
12
OVERVOLT
DETECTION
Figure 1. LT3486 Block Diagram