LTC4440 查看數據表（PDF） - Linear Technology
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LTC4440 Datasheet PDF : 14 Pages
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LTC4440
Typical Application
LTC3723-2/LTC4440/LTC3901 240W 42V-56VIN to Unregulated 12V Half-Bridge Converter
VIN
48VIN
–VIN
L1
0.56µH
1µF
100V
VIN
1µF
100V
11V
D1
1
3
VCC
6
A
INP BOOST
LTC4440ES6 5
TG
GND TS
2 4 0.22µF
B
Si7852DP
×2
Si7852DP
×2
VE
1µF
100V
1µF
100V
2
1µF
100V T2
70(980H):1 4
CS+
18
3
1µF
100V
3
7
5
7
9
L2 0.22µH
VF
11
1500pF
100V
20Ω 1W
Si7370DP
×2
Si7370DP
×2
VOUT
+ C2
180µF
16V
VOUT
1µF
12V
C3 +
L3
1mH
68µF
D2
C1
2.2nF
VF
250V
4.7k
1
1/4W
D3
T1
5:4:4:2:2
6
10k 3k
VE
4.7k
1/4W
10k 3k
–VOUT
–VOUT
VIN 12V
11V
MMBT3904
15k
1/4W
215k
120Ω
5
15
A
6
DRVA
4
DRVB
VCC
LTC3723EGN-2
UVLO
DPRG VREF RAMP CT SPRG GND CS SS
2
SDRB
SDRA 3
11
COMP
FB
T3
1(1.5mH):0.5
1
4
0.1µF
22Ω
8
100Ω
5
0.22µF B CS+
11
CSF+
9 SYNC
220pF
30.1k
100pF
1µF
1µF
330pF
12 1 9 8
62k 150pF
0.47µF
16 7
10k
10 14 13
1k
470pF
0.47µF
2N7002
4.7k
D4 D5
7.5Ω 7.5Ω
12V
MMBZ5242B
12 14 15 6
5 2 3 16
CSF– MF MF2 CSE+ CSE– ME ME2 VCC
33.2k 100Ω
VOUT
LTC3901EGN
1
PVCC
MMBT3904
GND PGND GND2 PGND2
8
4
10 13
TIMER
7
330pF
1µF
1µF
1k
10V
MMBZ5240B
1µF, 100V TDK C4532X7R2A105M
C1: MURATA DE2E3KH222MB3B
C2: SANYO 16SP180M
C3: AVX TPSE686M020R0150
D1-D3: BAS21
D4, D5: MMBD914
L1: COILCRAFT DO1813P-561HC
L2: SUMIDA CDEP105-0R2NC-50
L3: COILCRAFT DO1608C-105
T1: PULSE PA0801.005
T2: PULSE P8207
T3: PULSE PA0785
–VOUT
4440 TA04
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14 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 950Fo3r5m-7o4re1i7nformation www.linear.com/LTC4440
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com/LTC4440
4440fa
LT 1013 REV A • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 2003
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