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ML4435IP Datasheet(PDF) 3 Page - Micro Linear Corporation

Part # ML4435IP
Description  Sensorless BLDC Motor Controller
PDF  14 Pages
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Manufacturer  MICRO-LINEAR [Micro Linear Corporation]
Direct Link  http://www.microlinear.com
Logo MICRO-LINEAR - Micro Linear Corporation

ML4435IP Datasheet(HTML) 3 Page - Micro Linear Corporation

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May, 2000
PRELIMINARY DATASHEET
3
PRELIMINARY
ML4435
SOFT START
RT
VCC
GND
19
6
ISENSE 1
SPEED COMP
3
SPEED SET 5
HA
7
HB
8
HC
COAST
9
LA
11
LB
12
LC
13
TACH
2
CVCO
RVCO
20
SPEED FB
FB C 16
FB B
FB A
14
1V
5V
8.7V
VREF
0.97V
1.5V
VREF + 0.7V
2.2 + 0.7V
0.9V
8.2 + 0.7V
225k
Ω
225k
Ω
5.8k
Ω
2.9k
Ω
CURRENT LIMIT
COMPARATOR
DQ
R
+
–
PULSE-BY-PULSE
CURRENT LIMIT
PWM
COMPARATOR
+
–
UVLO COMPARATOR
SPEED
ERROR AMP
SPEED FB
BACK
EMF SAMPLER
3µs
POWER ON
RESET PULSE
6V REFERENCE
17
10
+
–
A
B
C
D
E
F
R
COMMUTATION
STATE MACHINE
GATING
LOGIC
AND
OUTPUT
DRIVERS
18
VOLTAGE
CONTROLLED
OSCILLATOR
LEVEL
SHIFT
0.7V
LEVEL SHIFT
0.7V
+
–
COMP
+
–
COMP
+
–
COMP
SIGN
CHANGER
NEUTRAL
SIMULATOR
TRIANGLE WAVE
GENERATOR
MUX
15
6
+
–
4
+
–
+
–
BLOCK DIAGRAM
ML4435 Block Diagram



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