ML4425CS Fairchild Semiconductor, ML4425CS Datasheet - Page 2

• 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

Pin Configuration
ML4425
2
Pin Description
Pin
10
11
12
13
14
15
1
2
3
4
5
6
8
9
SPEED SET
VCO/TACH
SPEED
I
COMP
Name
SENSE
C
V
I
LIMIT
V
HA
HB
HC
LC
C
LA
LB
VCO
REF
DD
T
Motor current sense input. When I
LB, and LC are shut off for a fixed time determined by C
Active low output driver for the phase A high-side switch.
Active low output driver for the phase B high-side switch.
Active low output driver for the phase C high-side switch.
Speed control loop compensation is set by a series resistor and capacitor from
SPEED COMP to GND.
A capacitor from C
6.9V reference voltage output.
Speed loop input which ranges from 0 (stopped) to V
Active high output driver for the phase A low-side switch.
Active high output driver for the phase B low-side switch.
Active high output driver for the phase C low-side switch.
Voltage on this pin sets the I
unconnected selects an internally set threshold.
This TTL level output corresponds to the signal used to clock the commutation state
machine. The output frequency is proportional to the motor speed when the back-
EMF sensing loop is locked onto the rotor position.
12V power supply input.
A capacitor to GND sets the voltage-to-frequency ratio of the VCO.
SPEED COMP
SPEED SET
VCO/TACH
I SENSE
28-Pin Narrow PDIP (P28N)
I LIMIT
V REF
V DD
HA
HB
HC
C T
LA
LB
LC
T
28-Pin SOIC (S28)
to GND sets the PWM oscillator frequency.
10
11
12
13
14
1
2
3
4
5
6
7
8
9
TOP VIEW
ML4425
SENSE
28
27
26
25
24
23
22
21
20
19
18
17
16
15
SENSE
threshold voltage at 0.2
GND
R REF
C IOS
BRAKE
FB C
FB B
FB A
C RR
SPEED FB
C RT
UV FAULT
C AT
R VCO
C VCO
Function
exceeds 0.2
REF
I
IOS
LIMIT,
(maximum speed).
.
PRODUCT SPECIFICATION
I
the output drivers LA,
LIMIT
, leaving this pin
REV. 1.0.2 7/2/01