Rainbow-electronics MAX5051 Bedienungsanleitung PDF herunterladen (Seite 2)

MAX5051

Parallelable, Clamped Two-Switch

Power-Supply Controller IC

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(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.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

AVIN, PVIN, XFRMRH to GND................................-0.3V to +80V

BST to GND ............................................................-0.3V to +95V

BST, DRVH to XFRMRH..........................................-0.3V to +12V

REG9, DRVDD, DRVL to GND................................-0.3V to +12V

DRVB, LXVDD, LXL, LXH to GND ..........................-0.3V to +12V

UVLO, STT, COMP, CON to GND ..........................-0.3V to +12V

FLTINT, RCFF to GND ............................................-0.3V to +12V

REG5, CS, CSS, FB to GND .....................................-0.3V to +6V

STARTUP, SYNCIN to GND......................................-0.3V to +6V

SYNCOUT, RCOSC to GND .....................................-0.3V to +6V

PGND to GND .......................................................-0.3V to +0.3V

LXL, LXH Current Continuous...........................................±50mA

DRVL, DRVH Current Continuous...................................±100mA

DRVL, DRVH Peak Current (<500ns) ....................................±5A

PVIN, REG9 Continuous Current ....................................+120mA

REG5 Continuous Current ................................................+80mA

DRVB, RCFF, RCOSC, CSS Continuous Current .............±20mA

COMP, SYNCOUT Continuous Current ............................±20mA

REG9, REG5, and COMP Short to GND ....................Continuous

Continuous Power Dissipation (T

= +70°C)

28-Pin TSSOP (derate 23.8mW/°C above +70°C) .....1905mW

28-Pin TSSOP (θ

)......................................................42°C/W

Operating Temperature Range .........................-40°C to +125°C

Maximum Junction Temperature (T

) ..............................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

SUPPLY CURRENT (AVIN, PVIN)

AVIN Standby Current I

ASTBY

300 450 µA

PVIN Standby Current I

PSTBY

AVIN

= V

PVIN

= 11V to 76V;

STARTUP

= V

= 0V;

BST

= V

XFRMRH

= V

DRVDD

= V

REG9

;

RCFF floating

400 650 µA

AVIN Supply Current I

AVIN

0.65 1 mA

PVIN Supply Current I

PVIN

AVIN

= V

PVIN

= 11V to 76V; V

= 0V;

BST

= V

DRVDD

= V

REG9

; V

XFRMRH

= 0V;

STARTUP, RCFF floating

812mA

AVIN Input Voltage Range Inferred from AVIN supply current test 11 76 V

+9V LDO (REG9)

PVIN Input Voltage Range V

PVIN

Inferred from PVIN supply current test 11 76 V

REG9 Output-Voltage Set Point V

REG9

PVIN

= 11V 8.3 9.0 V

REG9 Line Regulation V

PVIN

= 11V to 76V 0.1 mV/V

REG9 Load Regulation I

REG9

= 0 to 80mA 250 mV

REG9 Dropout Voltage I

REG9

= 80mA 0.5 V

REG9 Undervoltage Lockout

Threshold

REG9

falling 5.7 6.7 V

REG9 Undervoltage Lockout

Threshold Hysteresis

750 mV

+5V LDO (REG5)

REG5 Output-Voltage Set Point V

REG5

4.8 5.1 V

REG5 Load Regulation I

REG5

= 0 to 40mA 50 mV

REG5 Dropout Voltage

REG5

= 40mA, measured with respect

to V

REG9

0.5 V

1 2 3 4 5 6 7 ... 20 21

Power-Supply Controller IC 1

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