ML4425CP Ver la hoja de datos (PDF) - Micro Linear Corporation
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ML4425CP Datasheet PDF : 16 Pages
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ML4425
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
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
REFERENCE
VREF Total Variation
PWM OSCILLATOR
Line, Temp
6.5
6.9
7.5
Total Variation
CT = 1nF
28
Ramp Peak
3.9
Ramp Valley
1.7
Ramp Charging Current
?
SPEED CONTROL LOOP
SPEED SET Input Voltage Range
SPEED FB Input Voltage Range
SPEED COMP Output Current
0
VREF
0
VREF
±5
±20
SPEED SET Error Amp Transconductance VSPEED SET = xV, VSPEED FB = yV
144
START-UP
CAT Charging Current
C Suffix 0.68
0.98
I Suffix 0.5
1.1
CAT Threshold Voltage
1.4
1.7
CRT Charging Current
C Suffix 0.68
0.98
I Suffix 0.5
1.1
CRT Threshold Voltage
VOLTAGE CONTROLLED OSCILLATOR
1.4
1.7
Frequency Range
Frequency vs. SPEED FB
CURRENT LIMIT
RVCO = 5V, SPEED FB = 6V
1.5
1.85
2.2
RVCO = 5V, 0.5V £ SPEED FB £ 7V
300
ISENSE Gain
One Shot OFF-Time
V(ILIMIT) £ 2.5V
CIOS = 100pF
4.5
5.0
5.5
C Suffix
9
18
I Suffix
9
20
UNITS
V
kHz
V
V
µA
V
V
µA
µ
µA
µA
V
µA
µA
V
kHz
Hz/V
V/V
µs
µs
4
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