ENA0299 D

Ordering number : ENA0299B
LB11988H
Monolithic Digital IC
Fan Motor Driver
http://onsemi.com
Overview
LB11988H is a motor driver IC optimal for driving the DC fan motors.
Functions
• Three-phase full-wave current linear drive
• Built-in current limiter circuit
• Built-in saturation prevention circuits in both the upper and lower sides of the output stage
• Forward/backward rotation direction setting circuit built in
• FG amplifier
• Thermal shutdown circuit
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Symbol
Conditions
Ratings
Unit
VCC max
24
V
VS max
24
V
Maximum output current
IO max
1.3
A
Allowable power dissipation
Pd max
0.8
W
Independent IC
Operating temperature
Topr
-30 to +85
°C
Storage temperature
Tstg
-55 to +150
°C
Caution 1) Absolute maximum ratings represent the value which cannot be exceeded for any length of time.
Caution 2) Even when the device is used within the range of absolute maximum ratings, as a result of continuous usage under high temperature, high current,
high voltage, or drastic temperature change, the reliability of the IC may be degraded. Please contact us for the further details.
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Allowable Operating Ratings at Ta = 25°C
Parameter
Supply voltage
Hall input amplitude
Symbol
Conditions
Ratings
Unit
VS
5 to 22
V
VCC
7 to 22
V
VHALL
Semiconductor Components Industries, LLC, 2013
May, 2013
Between Hall inputs
±30 to ±80
mVo-p
20812 SY 20120127-S00010//D2006 SY IM B8-5373 No.A0299-1/6
LB11988H
Electrical Characteristics at Ta = 25°C, VCC = 12V, VS = 12V
Parameter
Symbol
Ratings
Conditions
min
VCC current drain
ICC
typ
Unit
max
RL = 560Ω (Y)
15
24
mA
VOsat1
IO = 500mA, Rf = 0.5Ω, Sink + Source
(Saturation prevention function included)
2.1
2.6
V
VOsat2
IO = 1.0A, Rf = 0.5Ω, Sink + Source
(Saturation prevention function included)
2.6
3.5
V
1.0
mA
+6
mV
Output
Output saturation voltage
Output leakage current
IOleak
Hall amplifier
Input offset voltage
Voff (HALL)
Input bias current
Vb (HALL)
Common-mode input voltage
-6
3
μA
3
VCC-3
V
8
VIN, WIN
1
Vcm (HALL)
FR
Threshold voltage
VFRTH
4
Input bias current
Ib (FR)
-5
V
μA
Current limiter
LIM pin current limit level
ILIM
Rf = 0.5Ω, With the Hall input logic states fixed
1
A
0.28
V
(U, V, W = high, high, low)
Saturation
Saturation prevention circuit
VOsat
(DET)
lower side voltage setting
RL = 560Ω (Y), Rf = 0.5Ω, The voltage between
each output and the corresponding Rf.
FG amplifier
Upper side output saturation voltage
Vsatu (SH)
Lower side output saturation voltage
Vsatd (SH)
Hysteresis
11.8
0.3
Vhys
TSD operating temperature
T-TSD
V
Design target value*
V
23
mV
170
°C
Note * : Items shown to be design target values in the conditions column are not measured.
Package Dimensions
unit : mm (typ)
3234B
HEAT SPREADER
15.2
(6.2)
0.65
10.5
7.9
15
(4.9)
28
14
1
0.8
2.0
0.25
0.3
2.7
0.1
(2.25)
2.45 max
(0.8)
SANYO : HSOP28HC(375mil)
No.A0299-2/6
LB11988H
Pd max - Ta
Allowable power dissipation, Pd max - W
1.0
Independent IC
0.8
0.8
0.6
0.42
0.4
0.2
0
-30
-10
10
30
50
70
90
Ambient temperature, Ta - °C
20 FC
19 NC
18 NC
17 UIN+
16 UIN-
15 VIN+
NC 9
WIN- 10
WIN+ 11
VIN- 12
NC 13
NC 14
21 NC
22 GND
23 FR
24 NC
25 FGOUT
26 NC
27 NC
28 WOUT
Pin Assignment
VCC 8
VS 7
RF 6
NC 5
NC 4
NC 3
UOUT 2
VOUT 1
LB11988H
Top view
Truth Table and Control Functions
Note : The “H” state for FR is defined as a voltage of 8V or higher, and the
Hall input
Source→Sink
1
2
3
4
5
6
V→W
W→V
U→W
W→U
U→V
V→U
W→V
V→W
W→U
U→W
V→U
U→V
FR
U
V
W
H
H
L
H
H
L
L
H
L
H
L
L
H
L
“L” state for FR is defined as a voltage of 4V or lower.
(When VCC = 12V.)
Note : For the Hall inputs, the input high state is defined to be the state
H
where the (+) input is higher than the corresponding (-) input by
L
0.01V or higher, and the input low state is defined to be the state
H
where the (+) input is lower than the corresponding (-) input by
L
0.01V or higher.
H
L
H
L
H
H
L
H
L
H
L
Note : Since this drive technique is a 180° current application scheme, the
phases other than the sink and the source phases will not turn off.
L
No.A0299-3/6
Forward/reverse
switing
Reference
voltage
-
+
TSD
Current limiter
+
GND
Feedback
amplifier
Differential
distribution
LIMREF
Synthesized output logarithmic
compression block
Bandgap 1.2V
-
+
-
+
-
+
FC
Logarithmic conversion and differential
distribution
VCC
FR
WIN-
WIN+
VIN-
VIN+
UIN-
UIN+
VCC
VCC
-
+
-
+
UIN-
UIN+
-
+
+
FG amplifier
-
+
Schmitt
amplifier
-
+
Drive distribution circuit and
lower side saturation
prevention control
Upper side saturation
prevention control
FGOUT
VCC
WOUT
VOUT
UOUT
RF
VS
LB11988H
Block Diagram
Hall input synthesis block (linear matrix)
No.A0299-4/6
LB11988H
Equivalent Circuit
Pin name
UIN+
UINVIN+
VINWIN+
WIN-
Equivalent circuit
Input +
Input 200Ω
200Ω
100μA
UOUT
VOUT
VS
VCC
WOUT
RF
150μA
Output
VS
Lower side oversaturation
prevention circuit input block
200Ω
30kΩ
RF
FR
VCC
200μA
FR
200Ω
1/2 VCC
FC
VCC
10kΩ
FC
FGOUT
VCC VCC
FGOUT
No.A0299-5/6
LB11988H
Pin Functions
Pin No.
Pin name
22
GND
FRAME
Note that the Rf pin will be at the lowest potential of the output transistors.
25
FGOUT
23
FR
20
FC
17, 16
11, 10
UIN+, UINVIN+, VINWIN+, WIN-
8
VCC
15, 12
Function
Ground for circuits other than the output transistors.
This is the FG amplifier output pin. Internally, it is a resistive load. (Pull up)
Forward/reverse switching pin
Corrects the frequency characteristics of the saturation prevention circuit loop and current limiter circuit.
U-phase Hall input. Logic high refers to the state where IN+ > IN-.
V-phase Hall input. Logic high refers to the state where IN+ > IN-.
W-phase Hall input. Logic high refers to the state where IN+ > IN-.
Power supply provided to all IC internal circuits other than the output block.
This voltage must be stabilized so that ripple and noise do not enter the IC.
7
VS
6
RF
Output block power supply
Used for output current detection. The current limiter circuit operates using the resistor (Rf) connected between this
pin and ground.
Note that the lower side saturation prevention circuit operates according to the voltage that appears on this pin.
Since the over-saturation level is set by this voltage, the level of the lower side saturation prevention circuit may be
degraded in the large current region if the value of Rf is made extremely small.
2
U-phase Hall output.
1
UOUT
VOUT
28
WOUT
W-phase Hall output.
V-phase Hall output.
(These pins include internal spark killer diodes.)
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PS No.A0299-6/6
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