ZXBM1016
High efficiency variable speed single-phase fan motor controller
Description
The ZXBM1016 is a high efficiency, low noise,
single-phase, DC brushless motor pre-driver
with PWM variable speed control and current
control suitable for fan and blower motors.
High efficiency and low noise are achieved
using a novel technique (patent pending) for
commutation current control.
The controllers are primarily intended to meet
industry standard OEM fan specifications where
external PWM control are applied, however,
they can also be used with other thermal control
techniques using an external voltage, PWM
signal or thermistor.
Features
•
•
•
•
•
•
•
•
•
•
•
•
Compliant with external PWM speed control
Compliant with thermistor control
Minimum speed setting
High efficiency utilizing tail-end current control
Low noise
Auto restart
Built in Hall amplifier
Hall bias
Speed pulse (FG) output
Integrated current control
Up to 18V input voltage (60V with external regulator)
Small TSSOP20 package
Applications
•
•
•
•
Mainframe and personal computer fans and
blowers
Instrumentation fans
Central heating blowers
Automotive climate control
Applications circuit
12V
D1
1N4148
V
CC
C1
1μF
Hall
H+
H-Bias
H-
R14
47kΩ
R12
1kΩ
R15
4.7kΩ
CONTROL
R16
4.7kΩ
R13
1kΩ
FG
0V
Q6
Q5
C4
0.1μF
R18
4.7kΩ
R10
16kΩ
C2
100pF
C
LCK
R11
Range
C3 220kΩ
0.47μF
C
INT
Gnd
C5
0.47μF
R17
10kΩ
R9
12kΩ
SPD
S
MIN
C
PWM
ThRef
ZXBM1016
Ph2Hi
Ph1Lo
Ph2Lo
Ph1Hi
D2
1N4004
R6
1kΩ
R5
100Ω
R1
470Ω
R2
470Ω
R3
2
3
4
3
R4
1kΩ
4
Q1-4
ZXMC
3A17DN8
5&6
7&8
5&6
W1 7 & 8
C6
2.2μF
2
100Ω
SetThRef
R7
Sense 33kΩ
SetTh
FG
R8
470Ω
Rsense
0.1Ω
1
1
TSSOP20
Ordering information - TSSOP20
Device
ZXBM1016ST20TA
ZXBM1016ST20TC
Reel size
(inches)
7 (180mm)
13 (330mm)
Tape width
(mm)
16
16
Quantity
per reel
1000
2,500
Device marking
ZETEX
ZXBM1016
Date code
Issue 1 - February 2007
© Zetex Semiconductors plc 2007
1
www.zetex.com
ZXBM1016
Absolute maximum ratings
Parameter
Supply voltage
Input current
Maximum input voltage
Maximum output voltage
Power dissipation
Operating temperature
Storage temperature
Symbol
V
CCmax
I
CCmax
V
Imax
V
Omax
P
Dmax
T
OPR
T
STG
Limits
-0.6 to 20
200
-0.6 to V
CC
+0.5
-0.6 to V
CC
+0.5
800
-40 to 85
-55 to 125
Unit
V
mA
V
V
mW
°C
°C
Electrical characteristics (at T
amb
= 25°C and V
CC
= 12V unless otherwise stated)
Parameter
Supply
Supply voltage
Supply current
Hall connections
Hall amp input voltage
V
IN
40
0.5
12
700
1.5
1.75
1000
1.95
-10
4.75
5.0
5.25
-10
-5.3
50
-7
75
3
1
Symbol
V
CC
I
CC
Min.
6.7
Typ.
Max. Unit Conditions
18
V
For valid ThRef
15
20
mA V
CC
= 12V, no load
(*)
mV diff p-p
Hall amp common mode voltage V
CM
Hall amp input hysteresis
V
OFS
Hall amp input current
Hall bias voltage
Hall bias output current
Reference voltage
ThRef voltage
ThRef output current
PWM oscillator
V
CC
-1.5
V
mV
nA
V
mA
V
mA
A
A
V
V
kHz C
PWM
= 0.1nF
V
V
100% PWM drive
0% PWM drive
I
OThRef
=-10mA
I
HBout
= -5mA
I
BS
V
HB
I
HB
V
ThRef
I
OThRef
I
PWMC
I
PWMD
V
THH
V
THL
F
PWM
V
SPDL
V
SPDH
I
ISPD
I
ISMIN
C
PWM
charge current
C
PWM
discharge current
C
PWM
high threshold voltage
C
PWM
low threshold voltage
PWM frequency
Speed control
SPD voltage minimum
SPD voltage maximum
SPD input current
Minimum speed setting
S
MIN
input current
-9.2
100
25
1
3
0.8
-0.25
2
-0.5
A V
IN
= 2V
A V
IN
= 2V
Issue 1 - February 2007
© Zetex Semiconductors plc 2007
2
www.zetex.com
ZXBM1016
Parameter
Tail-end current control
Range pin input current setting I
Range
range
Range pin input voltage
C
LCK
charge current - lock
C
LCK
charge current - run
C
LCK
discharge current - lock
C
LCK
high threshold voltage
C
LCK
low threshold voltage
C
INT
input current - lock
C
INT
charge current - run
C
INT
discharge current - run
Current limit
SetThRef output voltage
SetThRef output current
Sense input current
SetTh input current
Output drives
Ph1Lo, Ph2Lo output high voltage V
OH
Ph1Lo, Ph2Lo output low voltage V
OLA
Ph1Lo, Ph2Lo output low voltage V
OLB
Ph1Lo, Ph2Lo output source
current
Ph1Hi, Ph2Hi output low voltage
Ph1Hi, Ph2Hi output sink current
Ph1Hi, Ph2Hi off output
leakage current
Output flag
FG output current
FG low level output voltage
I
OL
V
OL
16
0.5
mA
V
I
OL
= 16mA
I
OH
V
CC–
2.2
V
CC–
1.8
0.4
0.4
0.6
0.6
-80
80
0.5
0.75
100
±100
V
V
V
mA
mA
V
mA
nA
I
OL
=100mA
I
OH
=80mA
I
OL
=16mA
(†)
I
OL
=50 A
(‡)
V
SetThRef
ThRef-
0.5V
I
SetThRef
I
Sense
I
SetTh
-20
-20
ThRef-
0.25V
-200
-100
-100
V
A
nA V
IN
=1V, SetTh=2V
nA V
IN
=2V, sense=1V
I
SetThRef
=200 A
V
IN
I
LCKCL
I
LCKCR
I
LCKDL
V
THH
V
THL
I
INTCL
I
INTCR
I
INTDR
-50
-1
0.8xI
Range
0.8
4
0.50
-0.75
0.65
-1.42
-(4xI
Range
)
0.8
5
1
300n
1.25
50
0.75
-1.8
A
V
Input current = 20 A
Symbol
Min.
Typ.
Max. Unit Conditions
A Lock mode, V
CLCK
= 2.5V
A Run mode
A Lock mode, V
CLCK
= 2.5V
V
V
Lock mode
nA Lock mode, V
CLCK
= 2.5V
mA Run mode
A Run mode
Ph1Lo, Ph2Lo output sink current I
OL
V
OLA
I
OL
I
OFF
NOTES:
(*) Measured with pins H+, H-, C
LCK
and C
PWM
= 0V and all other signal pins open circuit.
(†) Measured when opposing phase output is low.
(‡) Measured when opposing phase output is high.
Issue 1 - February 2007
© Zetex Semiconductors plc 2007
3
www.zetex.com
ZXBM1016
Block diagram
Vcc
ThRef
Vref
CPWM
PWM
Osc
Phase
Drive
Ph1 Hi
Ph2 Hi
Vcc
V
SPD
Control
Voltage
SPD
Vcc
SMIN
Set Min
Speed
Ph1 Lo
Phase
Drive &
Control
Vcc
CLCK
Locked
Rotor
Detect
Start-up
Ph2 Lo
SetThRef
Sense
Range
CINT
Tail-end
Control
Current
Monitor
Speed
Detect
SetTh
Vcc
H-Bias
H+
Hall
H-
Hall
Amp
Hall
Bias
Speed &
Lock
Detect
FG
Gnd
Pin assignments
Vcc
H+
H-Bias
H-
ThRef
SPD
S
MIN
C
PWM
C
LCK
Range
1
Ph2Hi
Ph1Lo
Ph2Lo
Ph1Hi
ZXBM1016
TSSOP20
SetThRef
Sense
SetTh
FG
C
INT
Gnd
Issue 1 - February 2007
© Zetex Semiconductors plc 2007
4
www.zetex.com
ZXBM1016
Pin description table
Pin
V
CC
Gnd
ThRef
H-Bias
H+
H-
SPD
Type
Power
Power
Description
The positive supply pin
The negative supply pin
Reference A 5 volt reference for external networks
Reference A nominal 1.75V reference used as the supply for naked Hall sensors
Input
Input
Input
Hall device positive input. When high in relation to H- Ph2 is active
Hall device negative input
Speed control input voltage, typically from a PWM integrator or
thermistor.
When low in relation to C
PWM
the phase low outputs will be turned on
Used to set a voltage that represents the minimum speed the motor is to
run at
A capacitor on this pin is used to set the PWM frequency
A dual use pin used to set the lock and tail-end current control timing.
This will typically be a 470nF capacitor
A resistor is attached between this pin and ThRef to set the device’s
dynamic operating range to the motor’s desired speed range
A capacitor is attached to this pin for use by the tail-end current control.
This will normally be the same value as that on the C
LCK
Pin
Open collector buffered output from the Hall sensor
Used to set the threshold voltage that represents the maximum current
to be taken by the motor
Input for the signal from a sense resistor in the ground return of the
H-bridge driving circuit used to represent the current taken by the motor
Phase 1 high power output to high-side of H-bridge
Phase 2 high power output to high-side of H-bridge
Phase 1 high power output to low-side of H-bridge
Phase 2 high power output to low-side of H-bridge
S
MIN
C
PWM
C
LCK
Range
C
INT
FG
SetTh
Sense
Input
Input
Input
Input
Input
Output
Input
Input
SetThRef Analogue A variable voltage source used to set the voltage on the SetTh pin
Ph1Hi
Ph2Hi
Ph1Lo
Ph2Lo
Output
Output
Output
Output
Operational functional description
Overview
The ZXBM1016 is a high efficiency, low noise, single-phase DC brushless motor pre-driver. It uses
voltage speed control and this voltage can be derived from either a PWM or thermistor source.
The device contains proprietary circuitry to control and limit the current at the end of a
commutation cycle. This tail-end current control (TECC) enables the use of lower rated
components thus providing for a more economic and higher efficiency solution.
The pre-driver also has the usual minimum speed setting and maximum current control
functions.
Issue 1 - February 2007
© Zetex Semiconductors plc 2007
5
www.zetex.com
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