Rainbow-electronics MAX773 Instrukcja Użytkownika Pobierz pdf (Strona 11)

MAX770–MAX773

5V/12V/15V or Adjustable, High-Efficiency,

Low I

, Step-Up DC-DC Controllers

______________________________________________________________________________________

GND

MAX773

0.1µF

OUT

= 12V

V+

63.4k

(1%)

10k

(1%)

SGND

LBO

EXTH

EXTL

V12

V15

REF

LBI

SHDN

SENSE

Si9410DY

0.1µF

22µH

1N5817

100k

4 = R3

(

TRIP

-1

)

REF

MIN NOMINAL MAX

10.6 11.0 11.4

TRIP

(V)

VREF = 1.5V

GND

MAX773

0.1µF

V+

EXTL

V12

SGND

LBO

REF

LBI

SHDN

SENSE

0.4Ω

150µF

0.1µF

1N5818

V15

EXTH

47µF

150µH

910Ω

34k

510k

ZTX694B

OUT

= 24V

@ 30mA

= 5V

OUT

REF

R2 = (R1) ( -1)

REF

= 1.5V

GND

MAX773

0.1µF

V+

EXTL

V15

V12

SGND

LBO

REF

SHDN

= 5V

SENSE

0.1µF

1N5817

EXTH

22µH

OUT

= 15V

LBI

Si9410DY

GND

MAX773

0.1µF

V+

EXTL

V15

V12

LBO

REF

LBI

SHDN

SENSE

1N5817

EXTH

20µH

OUT

= 16V

SGND

0.1µF

133k

13.7k

OUT

REF

R2 = (R1) ( -1)

REF

= 1.5V

Si9410DY

Figure 3a. 12V Preset Output, Bootstrapped, N-Channel

Power MOSFET

Figure 3b. 24V Output, Non-Bootstrapped, NPN Power

Transistor

Figure 3c. 15V Preset Output, Non-Bootstrapped N-Channel

Power MOSFET

Figure 3d. 16V Output, Bootstrapped, N-Channel

Power MOSFET

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 19 20

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