ML4425CS Просмотр технического описания (PDF) - Fairchild Semiconductor
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ML4425CS Datasheet PDF : 16 Pages
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ML4425
PRODUCT SPECIFICATION
Electrical Characteristics
Unless otherwise specified, VDD = 12V ± 10%, RSENSE = 1Ω, CVCO = 10nF, CIOS = 100pF, RREF = 137kΩ,
TA = Operating Temperature Range (Notes 1, 2).
Symbol
Parameter
Conditions
Min.
Typ.
Reference
VREF Total Variation
PWM Oscillator
Line, Temp
6.5
6.9
Total Variation
CT = 1nF
28
Ramp Peak
3.9
Ramp Valley
1.7
Ramp Charging Current
Speed Control Loop
SPEED SET Input Voltage
0
Range
SPEED FB Input Voltage Range
0
SPEED COMP Output Current
±5
SPEED SET Error Amp
VSPEED SET = xV,
144
Transconductance
VSPEED FB = yV
Start-up
CAT Charging Current
C Suffix 0.68
I Suffix
0.5
CAT Threshold Voltage
CRT Charging Current
1.4
C Suffix 0.68
I Suffix
0.5
CRT Threshold Voltage
1.4
Voltage Controlled Oscillator
Frequency Range
Frequency vs. SPEED FB
RVCO = 5V, SPEED FB = 6V
1.5
RVCO = 5V, 0.5V ≤ SPEED FB ≤
7V
1.85
300
Current Limit
ISENSE Gain
V(ILIMIT) ≤ 2.5V
4.5
5.0
Max.
7.5
VREF
VREF
±20
0.98
1.1
1.7
0.98
1.1
1.7
2.2
5.5
Units
V
kHz
V
V
µA
V
V
µA
µ
µA
µA
V
µA
µA
V
kHz
Hz/V
V/V
One Shot OFF-Time
Logic Inputs (BRAKE) (Note 3)
VIH Input High Voltage
VIL Input Low Voltage
IIH Input High Current
IIL Input Low Current
CIOS = 100pF
VIH = 2.4V
VIL = 0.4V
C Suffix
9
I Suffix
9
2
18
µs
20
µs
V
0.8
V
2.4
mA
2.9
mA
4
REV. 1.0.2 7/2/01
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