ML4435 Ver la hoja de datos (PDF) - Micro Linear Corporation
Número de pieza
componentes Descripción
Fabricante
ML4435 Datasheet PDF : 14 Pages
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PRELIMINARY
ML4435
PIN CONFIGURATION
PIN DESCRIPTIONS
PIN
NAME
1
ISENSE
2
TACH
3
SPEED COMP
4
RVCO
5
SPEED SET
6
RT
7
HA
8
HB
9
HC
10
VCC
11
LA
12
LB
13
LB
14
FB A
15
FB B
16
FB C
17
GND
18
SPEED FB
19
SOFT START
20
CVCO
ML4435
20-P n PDIP P20
20-P n SOIC S20
ISENSE
TACH 2
SPEED COMP 3
RVCO 4
SPEED SET 5
RT 6
HA
HB
HC 9
VCC 0
20 CVCO
9 SOFT START
SPEED FB
ND
6 FB C
5 FB B
4 FB A
3 LC
2 LB
LA
TOP VIEW
FUNCTION
Motor current sense input which triggers pulse by pulse current limit when
ISENSE exceeds 0.55V
A clock output of 6 pulses per commutation cycle when SPEED FB is greater
than 0.97V otherwise the TACH output is at 5V
Connection node for speed loop compensation components
Connection node for external resistor to set VCO frequency
DC input for setting motor speed
External resistor from this pin to ground controls the IC's PWM timing (frequency)
High-side output driver for motor phase A
High-side output driver for motor phase B
High-side output driver for motor phase C
Power Supply input
Low-side output driver signal for motor phase A
Low-side output driver signal for motor phase B
Low-side output driver signal for motor phase C
Back EMF signal input for motor phase A
Back EMF signal input for motor phase B
Back EMF signal input for motor phase C
Signal and power ground
Connection node for back-EMF sensing compensation components
Connection node for external soft start capacitor which reduces start up current
Connection node for external capacitor to set VCO frequency. Forcing this input
below 1.5V causes the commutation to stop and the motor to coast
4
PRELIMINARY DATASHEET May, 2000
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