Rainbow-electronics MAX5095A Manual do Utilizador descarregar pdf (Página 5)

MAX5094A/B/C/D/MAX5095A/B/C

High-Performance, Single-Ended, Current-Mode

PWM Controllers

_______________________________________________________________________________________ 5

ELECTRICAL CHARACTERISTICS (continued)

= +15V, R

= 10kΩ, C

= 3.3nF, REF = open, C

REF

= 0.1µF, COMP = open, V

= 2V, CS = GND, T

= T

= -40°C to +125°C,

unless otherwise noted.) (Note 1)

PARAMETER SYMBOL CONDITIONS

MIN TYP MAX

UNITS

CURRENT-SENSE AMPLIFIER

MAX5094A/MAX5094B

2.85

3.26

V/V

Gain (Notes 3, 4) A

MAX5094C/D, MAX5095_

2.85

3.40

V/V

MAX5094A/B (Note 3)

0.95

1.05

MAX5094C/MAX5094D (Note 3)

0.275 0.300 0.325

Maximum Current-Sense Signal V

CS_MAX

COMP

= 5V, MAX5095_

0.275 0.300 0.325

Power-Supply Rejection Ratio PSRR 12V ≤ V

≤ 25V 70 dB

Input Bias Current I

COMP

= 0V -1

-2.5

µA

Delay From CS to OUT

CS_DELAY

50mV overdrive 60 ns

MOSFET DRIVER

OUT Low-Side On-Resistance

RDS_ONL

SINK

= 200mA 4.5 12 Ω

OUT High-Side On-Resistance

RDS_ONH

SOURCE

= 100mA 3.5 9 Ω

SOURCE

(Peak) I

SOURCE

OUT

= 10nF 2 A

SINK

(Peak) I

SINK

OUT

= 10nF 1 A

Rise Time t

OUT

= 1nF 15 ns

Fall Time t

OUT

= 1nF 22 ns

UNDERVOLTAGE LOCKOUT/STARTUP

Startup Voltage Threshold

CC_START

7.98

8.4

8.82

Minimum Operating Voltage After

Turn-On

CC_MIN

7.1 7.6 8.0 V

Undervoltage-Lockout Hysteresis

UVLO

HYST

0.8 V

PWM

MAX5094A/MAX5094C/MAX5095A

94.5

97.5

Maximum Duty Cycle D

MAX MAX5094B/MAX5094D/MAX5095B/

MAX5095C

49.8

Minimum Duty Cycle D

MIN

SUPPLY CURRENT

Startup Supply Current I

START

= 7.5V 32 65 µA

Operating Supply Current I

= V

= 0 3 5 mA

Zener Bias Voltage at V

= 25mA 24

26.5

SYNCHRONIZATION (MAX5095A/MAX5095B only, Note 5)

SYNC Frequency Range f

SYNC

1000

kHz

SYNC Clock Input High

Threshold

SYNCINH

3.5 V

SYNC Clock Input-Low Threshold

SYNCINL

0.8 V

SYNC Clock Input Minimum

Pulse Width

PW_SYNCIN

200

SYNC Clock Output High Level V

SYNCOH

1mA external pulldown 4.0 4.7 V

SYNC Clock Output Low Level V

SYNCOL

SYNC

= 5kΩ 0 0.1 V

1 2 3 4 5 6 7 8 9 10 ... 21 22

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