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ML4425 Datasheet(PDF) 4 Page - Fairchild Semiconductor

No. de pieza ML4425
Descripción Electrónicos  Sensorless BLDC Motor Controller
Download  16 Pages
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Fabricante Electrónico  FAIRCHILD [Fairchild Semiconductor]
Página de inicio  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

ML4425 Datasheet(HTML) 4 Page - Fairchild Semiconductor

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ML4425
PRODUCT SPECIFICATION
4
REV. 1.0.2 7/2/01
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.
Max.
Units
Reference
VREF
Total Variation
Line, Temp
6.5
6.9
7.5
V
PWM Oscillator
Total Variation
CT = 1nF
28
kHz
Ramp Peak
3.9
V
Ramp Valley
1.7
V
Ramp Charging Current
µA
Speed Control Loop
SPEED SET Input Voltage
Range
0VREF
V
SPEED FB Input Voltage Range
0
VREF
V
SPEED COMP Output Current
±5
±20
µA
SPEED SET Error Amp
Transconductance
VSPEED SET = xV,
VSPEED FB = yV
144
µ
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
V
CRT Charging Current
C Suffix
0.68
0.98
µA
I Suffix
0.5
1.1
µA
CRT Threshold Voltage
1.4
1.7
V
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
9
18
µs
I Suffix
9
20
µs
Logic Inputs (BRAKE) (Note 3)
VIH
Input High Voltage
2
V
VIL
Input Low Voltage
0.8
V
IIH
Input High Current
VIH = 2.4V
2.4
mA
IIL
Input Low Current
VIL = 0.4V
2.9
mA


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