Rainbow-electronics MAX1641 Manual do Utilizador descarregar pdf (Página 4)

MAX1640/MAX1641

Adjustable-Output, Switch-Mode

Current Source with Synchronous Rectifier

4 _______________________________________________________________________________________

0.45

0.51

0.49

0.47

0.53

0.55

0.57

0.59

0.61

0.63

0.65

4 128 16 20 24 28

OFF-MODE SUPPLY CURRENT

(NO-LOAD)

MAX1640/41-TOC07

INPUT VOLTAGE (V)

OFF-MODE SUPPLY CURRENT (mA)

= -40°C

= +25°C

= +85°C

10,000

0 50 100 150 200 250 300 350 400

SWITCHING FREQUENCY vs. R

TOFF

MAX1640/41 TOC 08

OFF

(kΩ)

SWITCHING FREQUENCY (kHz)

100

1000

OUT

= +3V

OUT

= +6V

__________________________________________Typical Operating Characteristics

(Circuit of Figure 2, T

= +25°C, unless otherwise noted.)

100

2 6 8 104 12 14 16 18 20 22 24

EFFICIENCY vs. OUTPUT VOLTAGE

MAX1640/41-TOC01

OUTPUT VOLTAGE (V)

EFFICIENCY (%)

= 12V

= 18V

= 26V

1.460

1.470

1.480

1.490

1.500

1.510

4 128 16 20 24 28

MAX1640

OUTPUT CURRENT vs. INPUT VOLTAGE

MAX1640/41 TOC02

INPUT VOLTAGE (V)

OUTPUT CURRENT (A)

= -40°C

OUT

= 4V)

= +25°C

= +85°C

1.450

1.470

1.460

1.490

1.480

1.500

1.510

2 6 8 104 12 14 16 18 20 22 24

MAX1640

OUTPUT CURRENT vs. OUTPUT VOLTAGE

MAX1640/41-TOC03

OUTPUT VOLTAGE (V)

OUTPUT CURRENT (A)

= -40°C

= +85°C

= +25°C

1.450

1.475

1.500

1.525

1.550

4 128 16 20 24 28

MAX1641

OUTPUT CURRENT vs. INPUT VOLTAGE

MAX1640/41 TOC04

INPUT VOLTAGE (V)

OUTPUT CURRENT (A)

= -40°C

OUT

= 4V)

= +25°C

= +85°C

1.420

1.460

1.440

1.500

1.480

1.540

1.520

1.560

2 6 8 104 12 14 16 18 20 22 24

MAX1641

OUTPUT CURRENT vs. OUTPUT VOLTAGE

MAX1640/41-TOC05

OUT

(V)

OUTPUT CURRENT (A)

= -40°C

= +25°C

= +85°C

1.5

1.9

1.7

2.1

2.3

2.5

2.7

2.9

4 128 16 20 24 28

QUIESCENT CURRENT

vs. INPUT VOLTAGE (NO-LOAD)

MAX1640/41-TOC06

INPUT VOLTAGE (V)

QUIESCENT CURRENT (mA)

= -40°C

= +25°C

= +85°C

A: OUTPUT CURRENT, D1 = D0 = 1 1A/div

LOAD

= 3V

B: INPUT VOLTAGE, 10V/div

LINE-TRANSIENT RESPONSE

2ms/div

MAX1640/41 TOC 09

1 2 3 4 5 6 7 8 9 10 11

MAX1640/MAX1641 1

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