11

LT4250L/LT4250H

4250lhf

Figure 14. Using PWRGD to Drive an Optoisolator

Figure 13. Active Low Enable Module

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.

S8 Package

8-Lead Plastic Small Outline (Narrow .150 Inch)

(Reference LTC DWG # 05-08-1610)

N8 Package

8-Lead PDIP (Narrow .300 Inch)

(Reference LTC DWG # 05-08-1510)

N8 1098

0.100

(2.54)

BSC

0.065

(1.651)

TYP

0.045 – 0.065

(1.143 – 1.651)

0.130

± 0.005

(3.302

± 0.127)

0.020

(0.508)

MIN

0.018

± 0.003

(0.457

± 0.076)

0.125

(3.175)

MIN

12

3

4

87

6

5

0.255

± 0.015*

(6.477

± 0.381)

0.400*

(10.160)

MAX

0.009 – 0.015

(0.229 – 0.381)

0.300 – 0.325

(7.620 – 8.255)

0.325

+0.035

–0.015

+0.889

–0.381

8.255

()

*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.

MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)

0.016 – 0.050

(0.406 – 1.270)

0.010 – 0.020

(0.254 – 0.508)

× 45°

0

°– 8° TYP

0.008 – 0.010

(0.203 – 0.254)

SO8 1298

0.053 – 0.069

(1.346 – 1.752)

0.014 – 0.019

(0.355 – 0.483)

TYP

0.004 – 0.010

(0.101 – 0.254)

0.050

(1.270)

BSC

1

2

3

4

0.150 – 0.157**

(3.810 – 3.988)

8

7

6

5

0.189 – 0.197*

(4.801 – 5.004)

0.228 – 0.244

(5.791 – 6.197)

DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH

SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE

DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD

FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE

*

**

LT4250L

SENSE

OV

UV

+

–

+

–

+

–

+

–

GATE

+

C1

C3

Q1

R2

R3

C2

R4

R5

R6

R1

4

3

2

–48V RTN

– 48V

56

8

1

7

GATE

4250 F13

PWRGD

DRAIN

ACTIVE LOW

ENABLE MODULE

+

–

+

–

ON/OFF

–48V RTN

(SHORT PIN)

*

* DIODES INC. SMAT70A

4

3

2

1

Q2

LT4250L

PWRGD

SENSE

C1

470nF

25V

C3

100

µF

100V

Q1

IRF530

R2

10

Ω

5%

R7

51k

5%

R3

1k, 5%

C2

15nF

100V

R4

549k

1%

R5

6.49k

1%

R6

10k

1%

R1

0.02

Ω

5%

4

3

2

OV

–48V RTN

– 48V

UV

56

8

7

1

MOC207

GATE

DRAIN

4250 F14

PWRGD

+

–48V RTN

(SHORT PIN)

*

* DIODES INC. SMAT70A

4

3

2

1

PACKAGE DESCRIPTIO

APPLICATIO S I FOR ATIO