ML4425 datasheet(4/16 Pages) MICRO-LINEAR

4 / 16 page

ML4425

ELECTRICAL CHARACTERISTICS

Unless otherwise specified,VDD = 12V ± 10%, RSENSE = 1W, CVCO = 10nF, CIOS = 100pF, RREF = 137kW,

TA = Operating Temperature Range (Notes 1, 2)

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

REFERENCE

VREF

Total Variation

Line, Temp

6.5

6.9

7.5

PWM OSCILLATOR

Total Variation

CT = 1nF

kHz

Ramp Peak

3.9

Ramp Valley

1.7

Ramp Charging Current

µA

SPEED CONTROL LOOP

SPEED SET Input Voltage Range

VREF

SPEED FB Input Voltage Range

VREF

SPEED COMP Output Current

±5

±20

µA

SPEED SET Error Amp Transconductance

VSPEED SET = xV, VSPEED FB = yV

144

START-UP

CAT Charging Current

C Suffix

0.68

0.98

µA

I Suffix

0.5

1.1

µA

CAT Threshold Voltage

1.4

1.7

CRT Charging Current

C Suffix

0.68

0.98

µA

I Suffix

0.5

1.1

µA

CRT Threshold Voltage

1.4

1.7

VOLTAGE CONTROLLED OSCILLATOR

Frequency Range

RVCO = 5V, SPEED FB = 6V

1.5

1.85

2.2

kHz

Frequency vs. SPEED FB

RVCO = 5V, 0.5V £ SPEED FB £ 7V

300

Hz/V

CURRENT LIMIT

ISENSE Gain

V(ILIMIT) £ 2.5V

4.5

5.0

5.5

V/V

One Shot OFF-Time

CIOS = 100pF

C Suffix

µs

I Suffix

µs

ABSOLUTE MAXIMUM RATINGS

Absolute maximum ratings are those values beyond which

the device could be permanently damaged. Absolute

maximum ratings are stress ratings only and functional

device operation is not implied.

VDD .......................................................................... 14V

Logic Inputs (, SPEED FB, BRAKE) .......... GND - 0.3 to 7V

All Other Inputs and Outputs .. GND -0.3V to VDD + 0.3V

Output Current (LA, LB, LC, HA, HB, HC) ............ ±50mA

Junction Temperature .............................................. 150ºC

Storage Temperature Range ...................... –65ºC to 150ºC

Lead Temperature (Soldering 10 sec.) ..................... 260ºC

Thermal Resistance (

qJA)

28-Pin Narrow PDIP ......................................... 48ºC/W

28-Pin SOIC ..................................................... 75ºC/W

32-Pin TQFP ..................................................... 80ºC/W

OPERATING CONDITIONS

Temperature Range

ML4425CX................................................. 0ºC to 70ºC

ML4425IX ............................................... –40ºC to 85ºC

VDD ......................................................... 10.8V to 13.2V

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