ML4425CS Fairchild Semiconductor, ML4425CS Datasheet - Page 11

• Manufacturer Part Number: ML4425CS
• Description: IC BLDC MOTOR CONTROLLER 28-SOIC
• Manufacturer: Fairchild Semiconductor

Specifications of ML4425CS

• Applications: DC Motor Controller, Brushless (BLDC)
• Number Of Outputs: 1
• Current - Output: 50mA
• Voltage - Supply: 10.8 V ~ 13.2 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 28-SOIC (7.5mm Width)
• Operating Current: 50mA
• Operating Temperature Classification: Commercial
• Motor Controller Type: DC Motor Driver
• Package Type: SOIC W
• Operating Supply Voltage (min): 10.8V
• Operating Supply Voltage (max): 13.2V
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Load: -
• Lead Free Status / Rohs Status: Compliant

Run Mode (Back EMF Sensing)
PWM Speed Control
PRODUCT SPECIFICATION
REV. 1.0.2 7/2/01
FB A
FB B
FB C
C
R
SC
SC
SAMPLER
f
2
SB
BACK
EMF
750nA
26.9 N V
f
K
Figure 8. ML4425 Start-up Circuitry for Controlling the Align and Ramp Times
SB
10
V DD
e
2.5
1.5V
C
SC
C AT
98.696
MOTOR
OF COMMUTATION
–
+
TO RESET INPUT
STATE MACHINE
750nA
C AT
C
m
VCO
2
V DD
f
SB
1.5V
2
C RT
+
–
C RT
10k
Figure 9. Speed Control Loop Component Connections
500nA
V REF
C SC
R SC
C RR
C RR
V DD
C T
SPEED
FB
SPEED SET
SPEED COMP
C T
SPEED FB
C
FILTER
SPEED FB
T
1.7V
TO
FROM
C VCO
f
PWM
CONTROLLED
OSCILLATOR
+
–
I
20kHz
VOLTAGE
2.4V
1.7V
3.9V
50 A
R VCO
–
+
PWM ON/OFF
FROM I LIMIT
ONE-SHOT
VCO/TACH
DRIVERS
LOGIC &
OUTPUT
GATING
ML4425
TO
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