DC1850 - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
REV
__
DESCRIPTION
3
E6
2
1
D1
BAV3004W
1
2
R4 270k
RIN
392k
D
Q2
MMBT3904
D2
BAV3004W
2
R5
470k
1
1
D3
BAV3004W
DATE
6-5-12
D
3
2
E21
Mitchell L.
1
INPUT
18V - 41V
G
D
M2
S
FDB33N25
APPROVED
PRODUCTION
-100V REVERSE VOLTAGE
2
PROTECTION CIRCUIT
1
SHUTDOWN
LEVEL SHIFTER
R1 470k
R9
270k
3
R3
470k
E8
R8
4.7k
1
GND
Q1
MMBT3904
2
1
SHUTDOWN
R2 470k
3
SD
OUT
10
TIMER
FB
6
C1
470nF
25V
VSS
BASE
RX
OPT
100k
5
CSNUB
10nF
500V
+
RFB1
12.4k
R7
9.1k
RFB2
422k
D5
GREEN
OUTPUT
CLOAD
100uF
50V
E3
OUTPUT
1.5A MAXIMUM
CLAMPED AT 43.1V
C
E18
CX
10nF
100V
OPT
Q4
PZTA42
3
1
M1
FDB33N25
G
7
CT
10nF
100V
4
4
RG
8
CG
10nF
100V
2
2
E1
GATE
CF
1nF
100V
C
D7
BAV3004W
U1*
VDD
S
R6
270k
RSNUB
100
D
D4
BAV3004W
D6
GREEN
INPUT
3
B
B
RSS
34k
R10
200
2
MMBT3904
Q3
1
INPUT RANGE
GND
DC OPERATING
WIDE VOLTAGE RANGE
CONSTANT CURRENT
LED DRIVER
E5
E19
E20
E4
18V - 41V
DC SURVIVAL
+/- 100V
1ms TRANSIENT
*
ASSY
U1
PART NUMBER
DC1850A-A LTC4366HTS8-1
A
DC1850A-B LTC4366HTS8-2
PART MARKING
BEHAVIOR
LTFMC
LATCH OFF
LTFMF
AUTO RETRY
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
HZ
Mitchell L.
5
4
3
43.1V
SURGE TIMER
2.8ms
MAXIMUM LOAD
1.5A
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: SCHEMATIC
VERY HIGH VOLTAGE SURGE STOPPER
SIZE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
250V
OUTPUT CLAMP
N/A
SCALE = NONE
DATE:
2
IC NO.
REV.
LTC4366HTS8 FAMILY
DEMO CIRCUIT 1850A
3
Wednesday, June 20, 2012
SHEET 1
1
OF 1
A
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