Rainbow-electronics MAX1531 Uživatelský manuál stáhnout pdf (Strana 3)

MAX1530/MAX1531

Multiple-Output Power-Supply Controllers for

LCD Monitors

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1, V

= 12V, V

= V

SEQ

= 5V, T

= 0°C to +85°C, unless otherwise noted. Typical values are at T

= +25°C.)

PARAMETER CONDITIONS MIN TYP MAX UNITS

Comparator Bandwidth For EN, FB, FBL_ 10 kHz

Duration to Trigger Fault Latch For FB, FBL_ 51 64 77 ms

Overcurrent Protection Threshold (V

CSH

- V

CSL

) 270 300 330 mV

Overcurrent Sense Common-

Mode Range

CSH

, V

CSL

2.7 28.0 V

CSH Input Current V

CSH

= 2.7V to 28V 100 µA

CSL Input Current V

CSL

= V

CSH

= 12V -50 +50 nA

Overcurrent Sense Filter RC Time

Constant

50 µs

THERMAL PROTECTION

Thermal Shutdown Temperature rising, 15°C hysteresis 160 °C

RESET FUNCTION

RSTIN Reset Trip Level RSTIN falling, 25mV hysteresis 1.081 1.114 1.147 V

RSTIN Input Leakage Current V

RSTIN

= 1.5V -50 +50 nA

Comparator Bandwidth 10 kHz

Reset Timeout Period 102 128 154 ms

RESET Output Low Level I

RESET

= -1mA 0.4 V

RESET Output High Leakage V

RESET

= 5V 1 µA

STEP-DOWN CONTROLLER

ERROR AMPLIFIER

FB Regulation Voltage 1.223 1.238 1.253 V

Transconductance FB to COMP 70 100 140 µS

Voltage Gain FB to COMP 200 V/V

Minimum Duty Cycle 15 %

FB Input Leakage Current V

= 1.5V -50 +50 nA

FB Input Common-Mode Range (Note 2) -0.1 +1.5 V

COMP Output Minimum Voltage V

= 1.5V 1 V

COMP Output Maximum Voltage V

= 1.175V 3 V

Current-Sense Amplifier Voltage

Gain

- V

2.75 3.5 4.0 V/V

Current-Limit Threshold

(Default Mode)

PGND - LX, ILIM = VL 190 250 310 mV

Current-Limit Threshold

(Adjustable Mode)

PGND - LX, V

ILIM

= 1.25V 190 250 310 mV

ILIM Inp ut D ual M od e™ Thr eshol d 3.0 3.5 4.00 V

OSCILLATOR

FREQ = AGND 200 250 300

Switching Frequency

FREQ = VL 425 500 575

kHz

FREQ = AGND 75 80 88

Maximum Duty Cycle

FREQ = VL 75 80 88

Dual Mode is a trademark of Maxim Integrated Products, Inc.

1 2 3 4 5 6 7 8 ... 32 33

Komentáře k této Příručce

Žádné komentáře

Rainbow-electronics MAX1531 Uživatelský manuál Strana 3

Komentáře k této Příručce

Související produkty a manuály pro Senzory Rainbow-electronics MAX1531