Rainbow-electronics MAX5051 Manual do Utilizador descarregar pdf (Página 8)

MAX5051

Parallelable, Clamped Two-Switch

Power-Supply Controller IC

8 _______________________________________________________________________________________

CURRENT-LIMIT THRESHOLD

vs. TEMPERATURE

MAX5051 toc19

TEMPERATURE (°C)

CS THRESHOLD VOLTAGE (mV)

1007550250-25

145

150

155

160

165

170

140

-50 125

-20

100 270

240

210

180

150

120

OPEN-LOOP GAIN/PHASE

vs. FREQUENCY

FREQUENCY (kHz)

0.01 10 100 10000.1 1 10,000

GAIN (dB)

PHASE (DEGREES)

MAX5051 toc20

GAIN

PHASE

COMP OUTPUT VOLTAGE

vs. TEMPERATURE

MAX5051 toc21

TEMPERATURE (°C)

COMP OUTPUT VOLTAGE (V)

10075-25 0 25 50

-50 125

SOURCE

= 5mA

SINK

= 5mA

DRVH AND DRVL R

DSON

vs. TEMPERATURE

MAX5051 toc22

TEMPERATURE (°C)

DSON

(Ω)

10075-25 0 25 50

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

-50 125

DRVH AND DRVL SOURCING 50mA

DRVH AND DRVL SINKING 50mA

LXL AND LXH R

DSON

vs. TEMPERATURE

MAX5051 toc23

TEMPERATURE (°C)

DSON

(Ω)

8560-15 10 35

-40 110

LXH SOURCING 10mA

LXH SINKING 10mA

SWITCHING PERIOD vs. R

RCOSC

MAX5051 toc24

RCOSC

(kΩ)

SWITCHING PERIOD (µs)

1601208040

0200

NORMALIZED SWITCHING FREQUENCY

vs. TEMPERATURE

MAX5051 toc25

TEMPERATURE (°C)

NORMALIZED SWITCHING FREQUENCY

1007550250-25

0.960

0.970

0.980

0.990

1.000

1.010

1.020

0.950

-50 125

SWITCHING

SYNCIN TO SYNCOUT PROPAGATION

DELAY vs. TEMPERATURE

MAX5051 toc26

TEMPERATURE (°C)

PROPAGATION DELAY (ns)

1007525 500-25

100

110

120

130

-50 125

SYNCIN FALL TO SYNCOUT RISE

SYNCIN RISE TO SYNCOUT FALL

DRVH MAXIMUM DUTY CYCLE

vs. TEMPERATURE

MAX5051 toc27

TEMPERATURE (°C)

DRVH DUTY CYCLE (%)

1007525 500-25

46.4

46.8

47.2

47.6

48.0

48.4

48.8

49.2

49.6

50.0

46.0

-50 125

Typical Operating Characteristics (continued)

AVIN

= V

PVIN

= 12V, V

UVLO

= V

STT

= 3V, V

CON

= 3V, R

RCOSC

= 24kΩ, C

CSS

= 10nF, C

RCOSC

= 100pF, C

REG9

= 4.7µF, C

REG5

4.7µF, T

= +25°C, unless otherwise noted.)

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 20 21

Power-Supply Controller IC 1

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