LTC3705 LINER [Linear Technology], LTC3705 Datasheet - Page 7

• Manufacturer Part Number: LTC3705
• Description: 2-Switch Forward Controller and Gate Driver
• Manufacturer: LINER [Linear Technology]

BLOCK DIAGRA
FB/IN
FS/IN
SSFLT
NDRV
UVLO
GND
+
–
0.6V
6
5
4
1
7
8
0.27mA
I
NDRV
–
3.3V
V
+
V
FREQUENCY
1.242V
1.226V
CONDITION
FF
OPTO
BIAS
SET
0.66
RECTIFIER
+
–
W
IN
IN
+
–
8V
4.9µA
N/C
SIDE CONTROL
2V
SECONDARY SIDE CONTROL
PRIMARY
+
–
+
–
V
PGND
CC
RECEIVER
V
I
PWM
OSC
P-P
DET
SW
TRICKLE
CHARGE
OSCILLATOR
UVVIN
REGULATOR
CHARGER
13.4V/7V
TRICKLE
LINEAR
7.4V/7V
LINE OFF
CLOCK
PWM SECONDARY CONTROL
TIME
400mV
RAMP
–
+
V
P-P
SOFT-START
FAULT
5V
+
–
UVGD
PRIMARY
CONTROL
0V
PWM
5.3V/4.7V
14.25V
DET
SW
SHUNT REGULATOR
–
–
+
+
LEVEL
SHIFT
LOGIC
DRIVE
OC
UVINT
BOOTSTRAP
5V
REFRESH
+
–
REGULATOR
LTC3705
–
+
300mV
1.25V
13
12
14 BOOT
15 TG
16 TS
11 V
10 BG
3 V
2
9 PGND
SWITCHES
ON
NC
NC
IS
V
3705 BD
SLMT
CC
CC
3705fb
7