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LT1942 Datasheet(PDF) 9 Page - Linear Technology

Part # LT1942
Description  Quad DCDC Converter for Triple Outputs TFT Supply Plus LED Driver
Download  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1942 Datasheet(HTML) 9 Page - Linear Technology

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LT1942
9
1942fa
BLOCK DIAGRA
14
–
+
–
+
+
– 28mV
FB1
PGOOD
ENABLE
SS1
R
ONE
SHOT
QS
S
RQ
1.250V
REFERENCE
SOFT-START
COMPARATOR
AVDD BOOST CONVERTER
DRIVER
11
SW1
Q1
Q2
Q3
Q4
20
PGND14
13
7
SHDN
22
VCC
8
CTRL4
10
AGND
RAMP-PULSE
GENERATOR
Σ
6
–
+
–
+
NFB2
S
RQ
–150mV
REFERENCE
1MHz
OSCILLATOR
COMPARATOR
VOFF INVERTING CONVERTER
DRIVER
SW2
24
D2
D2
RAMP-PULSE
GENERATOR
Σ
23
5
–
+
–
+
FB3
S
RQ
1.250V
REFERENCE
COMPARATOR
VON BOOST CONVERTER
DRIVER
SW3
2
D3
D3
3
PGND23
SW4
RAMP-PULSE
GENERATOR
Σ
1
–
+
–
+
FB4
90k
10k
200mV
S
RQ
COMPARATOR
40V
LED BOOST CONVERTER
DRIVER
19
SS4
ENABLE
ENABLE
ENABLE
RAMP-PULSE
GENERATOR
Σ
21
VOUT3
4
CT
9
D4
D4
PGND14
1942BD
PNP
DRIVE
DELAY
GENERATOR
SOFT-START
12
16
Q5
FB4
LED2
17
Q6
LED1
18
15
Q7


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