ML4425CS Fairchild Semiconductor, ML4425CS Datasheet - Page 10

• 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

ML4425
Back EMF Sensing PLL Commutation Control
Start-Up Sequence
Align Mode (RESET)
10
R
C
SPEEDFB
C
SPEEDFB2
SPEEDFB1
C
2 M In
AT
C
SPEEDFB1
0.25
t
S
K
100
7.5 10
O1
d
M
1.5V
M 1
N
In
S
7
100
K
d
amp
O1
f
N
VCO
S
2
2
f
1 M
VCO
2
Ramp Mode
22
23
24
Figure 7. Back EMF Commutation Phase Locked Loop
FB A
FB B
FB C
STATE MACHINE
SAMPLER
COMMUTATION
R
F
E
BACK
EMF
C
RT
A
D
500nA
B
C
2
SPEED
V DD
FB
J 5 10
I
MAX
20
C
SPEEDFB1
K
CONTROLLED
t
LOCKED
PRODUCT SPECIFICATION
OSCILLATOR
PHASE
7
LOOP
VOLTAGE
3 N
amp K
REV. 1.0.2 7/2/01
R
C
V
SPEEDFB
SPEEDFB2
VCO/TACH
13