LTC3524_15 Datasheet, PDF (8/16 Pages) Linear Technology – Adjustable TFT Bias Supply with WLED Driver

LTC3524
BLOCK DIAGRAM
10μH
2.5V TO 6V
4.7μH
+5V
R2
324k
+10V
+12.5V
10μF
5
SW1
VBEST
2 _VIN
4
V_OUT
R1
1M
SHDN
SYNCHRONOUS
PWM BOOST
CONVERTER
HIGH
VOLTAGE
PWM BOOST
CONVERTER
FBVO 1.225V
3
21
SW2
VLED
20
STRING ENABLE
LED CURRENT
SHARING
OVP
LED1
19
LED2
18
C2⁺
7
C2^–
6
V2x
8
IN
CHARGE
PUMP
DOUBLER
OUT
SHDN
16 ^CH+
17 ^CH–
VH
15
IN
REGULATED
CHARGE
PUMP
QUADRUPLER
OUT
R3
SHDN
2M
V_OUT
CHARGE
PUMP
SEQUENCER
OSCILLATOR
CONTROL
PROG
23
ELED2
22
SHUTDOWN WHEN
ELCD = ELED1 = ELED2 = 0V
ELED1
24
ELCD
1
IN
REGULATED
CHARGE
PUMP
INVERTER
OUT
VNIN
9
CN⁺
10
NC
11
VN
12
SHDN
R4
220k
FBH 1.225V
14
GND,
EXPOSED PAD
25
FBN
1V
13
3524 BD
10μF
RPROG
ANALOG DIMMING
ENABLE/PULSE DIM LED2 STRING
ENABLE/PULSE DIM LED1 STRING
LCD BIAS ENABLE
V2x
–7.5V
R6
1M
R5
470k
V_OUT
3524f
8