LTC3901EGN#TRPBF Datasheet LTC3901EGN#PBF, LTC3901EGN#TRPBF | P13-P15

LTC3901

13

3901f

TYPICAL APPLICATIO S

U

L6 0.65µH

1µF

V

OUT

V

E

V

F

–V

OUT

–V

OUT

8.5V

100Ω

C4

3.3µF

50V

390pF

1µF

100Ω

2k

1/4W

Q1

D6

9.1V

C1, C2, C3

470µF

6.3V

×3

Si7892DP

×3

Si7892DP

×3

1

8

49

11

V

F

V

F

5

3901 TA01

V

OUT

–V

OUT

D1

470Ω

1W

D2

100k

1k

T1

9:9:7:1:1

T2

1(1.5mH):0.5

T1

9T(150µH):9T:7T:1T:1T

••

0.1µF

330pF

C7

2.2nF

250V

+

C5

68µF

20V

+

12

11

8

7

10

9

2

4

5

6

3

1

22Ω

360Ω

L4

1mH

D4

D5

–V

OUT

V

OUT

330Ω

47Ω

0.68µF

D7

1µF, 100V TDK C3225X7R2A105M

C1-C3: SANYO 6TPB470M

C4: TDK C3225X7R1H335M

C5: AVX TPSE686M020R0150

C6: TAIYO YUDEN TMK432BJ106KM

C7: MURATA DE2E3KH222MB3B

D1, D2: DIODES INC. ES1A

D4, D5: BAS21

D6: MMBD5239B

D7: BAT54

L4: COILCRAFT DO1608C-105

L5: VISHAY IHLP-2525CZ-01

L6: PULSE PA1294.650

Q1: FZT690B

Q2: FMMT3904

R1, R2: IRC LRC-LR2512-01-R060-G

T1: EFD25 TRANSPOWER TTI8696

T2: PULSE PA0785

Q2

Si7450DPSi7450DP

80Ω

1W

100pF

200V

80Ω

1W

100pF

200V

470Ω

R1

0.06Ω

1.5W

R2

0.06Ω

1.5W

L5

1µH

1µF

100V

×3

1µF

100V

V

IN

V

IN

–V

IN

3

42610

6

5

18

1

9

14

13

7

12

16

8

3

11

5

15

6

58

1

2

V

OUT

10V

8.5V

787Ω

100Ω

220pF

4.99k

1/4W

270Ω

2.49k

0.022µF

47nF

–V

OUT

GND-F

V

+

GND-S

COLL REF

LT1431CS8

SYNC PV

CC

CSF

+

LTC3901EGN

MOC207

0.1µF

LTC3723EGN-1

V

REF

DPRGSSFBGNDR

LEB

SPRGC

T

DRVB SDRB

SDRA

COMP

V

CC

UVLO

DRVA CS

820Ω

150k

30k

5V

33k

10k

0.47µF

68nF

220pF

1µF

100pF

100Ω

1/4W

10V

66.5k

V

IN

5V

383k

75k

12

4.99k

CSF

–

14

8

4

10 13

MF

15

MF

6

V

E

4.99k

1/4W

CSE

+

5

4.99k

40.2k

CSE

–

GND PGND GND PGND

7

TIMER

2

ME

316

1

ME V

CC

1µF

••

•

165W 36V-72V Input to 3.3V at 50A Isolated Push-Pull Converter

LTC3901

14

3901f

TYPICAL APPLICATIO S

U

240W 42V-56V Input to Unregulated 12V Half-Bridge Converter

5

46

A

B

11V12VV

IN

MMBT3904

15

LTC3723EGN-2

DRVB

SDRB

SDRA

COMP

V

CC

UVLO

12

62k

330pF

12V

MMBZ5242B

150pF

1

0.47µF

1µF

DRVA

DPRG V

REF

RAMP SPRG GND SSCS FBC

T

470pF

0.47µF

4.7k

0.22µF

2N7002

B

CS

+

T3

1(1.5mH):0.5

T1

5:4:4:2:2

1µF

8913

1k

22Ω

0.1µF

C1

2.2nF

250V

1µF

100V

1µF

100V

1µF

100V

1µF

100V

0.22µF

Si7370DP

×2

Si7852DP

×2

1

6

5

42

3

A

Si7370DP

×2

1500pF

100V

L2 0.22µH

L3

1mH

C3

68µF

V

F

•

11

3

2

8

19

5

4

16

10k

120Ω

30.1k

7

10

14

7.5Ω

D4 D5

7.5Ω

220pF

100Ω

10k

3k

4.7k

1/4W

100pF

215k

15k

1/4W

SYNC PV

CC

CSF

+

V

F

LTC3901EGN

CSF

–

8

11 12

1

41013 7

1µF

3901 TA02

–V

OUT

10V

MMBZ5240B

1k

V

OUT

MF MF

GND PGND GND PGND TIMER

V

CC

330pF

14 15

10k

3k

33.2k 100Ω

4.7k

1/4W

CSE

+

V

E

20Ω 1W

–V

OUT

V

OUT

V

OUT

–V

OUT

CSE

–

65

ME ME

23 16

MMBT3904

Si7852DP

×2

L1

0.56µH

72

4

CS

+

T2

70(980µH):1

8

7

1

3

12V

D2

D1

D3

3

5

1

6

•

••

•

9

11

V

E

+

LTC4440ES6

BOOSTIN

+

TG

TSGND

V

CC

11V

1µF

100V

V

IN

V

IN

–V

IN

48V

IN

1µF

100V

C2

180µF

16V

+

1µF

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

LTC3901

15

3901f

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

TYPICAL APPLICATIO S

U

240W 42V-56V Input to 12V at 20A Isolated 1/4 Brick (2.3" × 1.45")

5

46

A

B

12V

V

IN

15

LTC3723EGN-1

DRVB

SDRB

SDRA

COMP

CS

V

CC

UVLO

9

150k

1

0.47µF

1µF

DRVA

DPRG V

REF

SPRGGND SSFB C

T

330pF

22nF

100k

D8

10V

68nF

270pF

T2

1(1.5mH):0.5

T1

4T:6T(65µHMIN):6T:2T:2T

243k

2.49k

9.53k

10k

750Ω

1k

100Ω

1/4W

813

3

Si7370DP

×2

L4

1mH

C3

68µF

20V

V

F

•

3

2

8

19

5

4

16

10k

33k

200Ω

1/4W

R1

0.03Ω

1.5W

66.5k

RLEB

12

7

14

220pF

22nF

100Ω

665Ω

1k

866Ω

6.19k

1/4W

1.5nF

464k

30k

1/4W

SYNC PV

CC

CSF

+

V

F

LTC3901EGN

CSF

–

8

11 12

1

41013 7

1µF

4.7µF

3901 TA03

–V

OUT

V

OUT

–V

OUT

D7

10V

V

OUT

MF MF

GND PGND GND PGND TIMER

V

CC

470pF

22nF

14 15

1k

866Ω

42.2k

100Ω

MMBT3904

1k

6.19k

1/4W

CSE

+

V

E

–V

OUT

V

OUT

V

F

V

OUT

12V/20A

–V

OUT

CSE

–

65

ME ME

23 16

Si7370DP

×2

Si7852DPSi7852DP

L5

0.56µH

112

4

12V

D5

D6

3

5

1

6

•

••

•

9

7

V

E

+

0.1µF

1

6

5

4

B

2

A

D3

LTC4440ES6

BOOSTIN

+

TG

TSGND

V

CC

12V

3

0.1µF

Si7852DP Si7852DP

1

6

5

42

B

D4

LTC4440ES6

BOOSTIN

+

TG

TSGND

V

CC

12V

1µF

100V

×3

V

IN

V

IN

–V

IN

42V TO 56V

1µF

100V

C1, C2

47µF

16V

×2

+

1µF

100V

1µF, 100V TDK C3225X7R2A105M

C1, C2: SANYO 16TQC47M

C3: AVX TPSE686M020R0150

C4: MURATA GHM3045X7R222K-GC

D2: DIODES INC. ES1B

D3-D6: BAS21

D7, D8: MMBZ5240B

L4: COILCRAFT DO1608C-105

L5: COILCRAFT DO1813P-561HC

L6: PULSE PA1294.132 OR

PANASONIC ETQP1H1R0BFA

R1, R2: IRC LRC2512-R03G

T1: PULSE PA0805.004

T2: PULSE PA0785

6

10

I

SNS

I

SNS

0.1µF

11

58

1

2

1

MOC207

C4

2.2nF

250V

0.1µF

3

6

5

8

GND-F

V

+

GND-S

COLL REF

LT1431CS8

A

1.5k

22Ω

4.7Ω

R2

0.03Ω

1.5W

V

F

D2

470pF

100V

L6

1.25µH

1k

1/4W

10Ω

1W

6

93

EFFICIENCY (%)

94

95

96

97

81012

LOAD CURRENT (A)

EFFICIENCY

14

16 18 20

42V

IN

48V

IN

56V

IN

LTC3901EGN#TRPBF

LTC3901EGN#TRPBF

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