Rainbow-electronics MAX5051 Bedienungsanleitung PDF herunterladen (Seite 5)

MAX5051

Parallelable, Clamped Two-Switch

Power-Supply Controller IC

_______________________________________________________________________________________ 5

ELECTRICAL CHARACTERISTICS (continued)

(AVIN = 12V, PVIN = 12V, V

UVLO

= V

STT

= 3V, V

CON

= 3V, R

RCOSC

= 24kΩ, C

CSS

= 10nF, C

RCOSC

= 100pF, C

REG9

= 4.7µF,

REG5

= 4.7µF, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at T

= +25°C. All driver, voltage-regulator, and refer-

ence outputs unconnected except for bypass capacitors.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

HIGH-SIDE MOSFET DRIVER (BST, DRVH, XFRMRH)

Peak Source Current

D RV H

= GN D , p ul se w i d th < 100ns,

B S T

= V

R E G9

, V

X FR M R H

= 0V

Peak Sink Current

D RV H

= V

B S T

, p ul se w i d th < 100ns,

B S T

= V

R E G9

, V

X FR M R H

= 0V

DRVH Resistance Sourcing

DRVH

= 50mA, V

BST

= V

REG9

XFRMRH

= 0V

1.7 3.5 Ω

DRVH Resistance Sinking

DRVH

= -50mA, V

BST

= V

REG9

XFRMRH

= 0V

0.6 1.4 Ω

Skew Between Low-Side and

High-Side Drivers

0ns

BOOST CAPACITOR CHARGE MOSFET (DRVB)

DRVB Resistance Sourcing I

DRVB

= 50mA 8 35 Ω

DRVB Resistance Sinking I

DRVB

= 50mA 5 35 Ω

Delay from Clock Fall 200 ns

One-Shot Pulse Width 300 ns

STARTUP (STARTUP)

Startup Threshold V

STARTUP

rising 1.4 2.1 V

Startup Threshold Hysteresis 330 mV

Internal Pullup Current I

STARTUP

50 µA

S TARTU P P ul l d ow n M OS FE T

D S ( ON )

Sinking 10mA 50 100 Ω

OVERTEMPERATURE SHUTDOWN

Shutdown Junction Temperature Temperature rising 150 °C

Hysteresis 10 °C

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

Power-Supply Controller IC 1

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