General Description Features Typical Application Circuit

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General Description
The FS276, a 1-chip composed of hall sensor and output coil drivers, applied to a 2-phase
DC motor. The high sensitivity of Hall effect sensor is suitable for motors from mini-type
CPU coolers to blowers and DC fans. Typical operation current is 0.4A and operating
voltage range is from 3.0V ~ 20V.
Using few external components, FS276, a high performance integrated IC, is designed for a
2-phase DC motor circuit. The circuit diagram of the typical application example is as
below.
Features
˙1 chip hall sensor/drivers
˙Wide operating voltage range: 3.0V~20V
˙Output sink current up to 0.4A
˙Package : TO-92SP-4
TO-92SP-4
Typical Application Circuit
VCC
FTC
S276
Rev0.2 Nov. 09, 2004(LF)
P1/FS276
Functional Block Diagram
1
Regulator
2
Hall Sensor
Pre-driver
AMP
3
4
MARK VIEW
FTC
PIN DESCRIPTION
NAME
NO.
STATUS
VCC
1
P
IC Power Supply
NO
2
O
Coil driver output
It is low state during the N magnetic
field.
SO
3
O
Coil driver output
It is low state during the S magnetic
field.
GND
4
P
IC Ground
S276.
1
2
3
4
DESCRIPTION
Rev0.2 Nov. 09, 2004(LF)
P2/FS276
Absolute Maximun Ratings ( at Ta = 25 oC )
Zener Breakdown Voltage (Vz) -----------------------------------------------------------
35V
NO/SO Pin Voltage(off) -------------------------------------------------------------------
30V
VCC Pin Voltage ------------------------------------------------------------------------------
20V
Peak Sink Current (Io)
Peak Current-------------------------------------------------------------------------
1A≦ 100us
Hold Current--------------------------------------------------------------------------
600mA
Continuous Current ----------------------------------------------------------------
400mA
Power Dissipation
Ta=25 oC -----------------------------------------------------------------------------o
Ta=95 C ------------------------------------------------------------------------------
700mW
450mW
Thermal Resistance
Θja= ----------------------------------------------------------------------------------- 0.15 oC/mW
Operating Temperature Range ----------------------------------------------------
-20 oC to +85 oC
Storage Temperature Range -------------------------------------------------------
-65 oC to +150 oC
Junction Temperature -----------------------------------------------------------------------
+150 oC
Lead Temperature (Soldering, 10 sec) --------------------------------------------------
+260 oC
ROOM TEMP
255 ± 5oC
10 ± 1 sec
150 ± 10 oC
90 ± 30 sec
2 ~ 5 oC / sec
2 ~ 5
o
C / sec
SECOND
Soldering Condition
Rev0.2 Nov. 09, 2004(LF)
P3/FS276
DC Electrical Characteristics (at Ta = 25 oC)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX UNIT
Operating Voltage
VCC
No use pin is open (Fig1)
3
-
20
V
Quiescent Supply current
ICC
No use pin is open Vcc : 3V
to 20V (Fig1)
-
18
20
mA
Output Leakage current
Ileak
Vcc=12V, Vce=20V
-
<0.1
10
uA
NO/SO Saturation Voltage
VSAT
Io = 400mA
-
400
800
mV
MIN
TYP
MAX
UNIT
0.1
0.3
uS
100
180
nS
AC Eletrical Characteristics
PARAMETER
SYMBOL
Rise time
(tr)
Fall time
(tƒ )
TEST CONDITIONS
RL=100ohm(5w) CL=20pF
(Fig1)
RL=100ohm(5w) CL=20pF
(Fig1)
Rev0.2 Nov. 09, 2004(LF)
P4/FS276
Magnetic Characteristics (1mT = 10Gauss)
Ta = -20 oC to +85 oC
FS276LF-A
Parameter
Symbal
Min.
Operate Point
Bop
Release Point
Brp
Hysteresis
Bhys
Typ
Max.
Unit
+5
+60
Gauss
-60
-5
Gauss
Gauss
60
o
FS276LF-Bu
o
Ta = -20 C to +85 C
Parameter
Symbal
Operate Point
Bop
Release Point
Brp
Hysteresis
Bhys
Min.
Typ
Max.
Unit
+80
Gauss
-80
Gauss
Gauss
60
o
FS276LF-C
o
Ta = -20 C to +85 C
Parameter
Symbal
Operate Point
Bop
Release Point
Brp
Hysteresis
Bhys
Min.
Typ
-100
Max.
Unit
+100
Gauss
Gauss
60
Gauss
Output Voltage in Voltage
Output Voltage in Voltage
FS276 Magnetic Hysteresis Characteristics
Rev0.2 Nov. 09, 2004(LF)
P5/FS276
Test Circuits:
FTC
S276
VCC
RL1=RL2=100
ohm
CL1=CL2=20 pF
RL1
Vout1
RL2
Vout2
CL1 CL2
Fig 1
Rev0.2 Nov. 09, 2004(LF)
P6/FS276
45
- 10
40
- 15
35
- 20
BRP - GAUSS
BOP - GAUSS
Typical Characteristics
30
25
- 35
15
- 40
- 45
0
3
6
9
12
15
20
0
40
68
35
66
64
60
15
6
9
12
15
10
-20
20
20
40
60
VCC - V
TEMPERATURE - oC
Figure 3
Figure 4
75
- 20
70
- 25
65
BHYS - GAUSS
- 15
- 30
- 35
- 45
45
80
o
100
100
80
100
55
50
60
80
60
- 40
40
20
25
20
58
15
30
62
20
12
Figure 2
70
- 50
-20
9
Figure 1
45
3
6
VCC - V
72
0
3
VCC - V
BOP - GAUSS
BHYS - GAUSS
- 30
20
10
BRP - GAUSS
- 25
40
-20
20
40
60
TEMPERATURE - C
TEMPERATURE - oC
Figure 5
Figure 6
Rev0.2 Nov. 09, 2004(LF)
P7/FS276
Function Descriptions
HALL SENSOR LOCATION
The Fig 2 is the hall sensor location, where marks the IC number. The best sensitivity,
which can be intensified as much as possible, depends on the vertical distance and position
between magnetic pole and the hall sensor (Fig 3). For the single-phase motor, this design
is very important.
Fig 2 FS276 Hall Sensor Location
N
S
d
d1: hall sensor to case is 0.52mm
Fig 3 Magnetic Distribution and Z-axis position
Rev0.2 Nov. 09, 2004(LF)
P8/FS276
Application Note
The Example of Typical Application Circuit
Fig 4 is the example of typical application circuit. The red, yellow, and black wires are the
input points of the motor system: red, the input of power supply; yellow, the output of FG;
black, the ground signal. RC is an external pull-up resistance for the use of measuring FG
signal. In view of the design, the value of RC could be decided by the transistor saturation
voltage (VON), sink current (IC), and off-level voltage (VC).
The formula is:
R C=
VC − VON
IC
For example:
VC = +5V for TTL level.
IC = 10mA at 0.2V saturation voltage
The safety value of RC= 470Ω
D1 is the reverse protection diode. As if the red and black wires reversely connect with the
power source, the current will flow through the ground via IC and coils L1 and L2 to power
supply. Under such kind of circumstances, the IC and coils are easy to be burned out.
Therefore, D1, the reverse protection diode, is necessary for the design. However, D1 will
also cause an extra voltage drop on the supply voltage.
C1 is a capacitor to reduce the ripple noise caused during the transient of the output stages.
The volume of the ripple noise depends on the coil impedance and characteristics.
Fig 4 Application Circuit
Rev0.2 Nov. 09, 2004(LF)
P9/FS276
Package Outline (LEAD FREE) Unit:mm
2-
5
de
de
g.
g.
15.0±1.0
3.66±0.12
2-
3
Rev0.2 Nov. 09, 2004(LF)
P10/FS276
Packing Specifications
BAG & BOX DIMENSION
160 mm
100 mm
200 mm
FTC Logo
BAG LABEL
BOX
LABEL
630 mm
BAG
190 mm
INSIDE BOX
400mm
240mm
650mm
CARTON
LABEL
FTC Logo
CARTON
PACKING QUANTITY SPECIFICATIONS
1000 EA/1 BAG
25 BAGS/1 INSIDE BOX
4 INSIDE BOXES/1 CARTON
Rev0.2 Nov. 09, 2004(LF)
P11/FS276
Label Specification
7.5 cm
Feeling Technology Corp.
Product Type:
XXXXXXXX
Lot No:
5.5 cm
FS276LF- X
Date Code:
XXX
Package Type: SIP- 4L
Marking Type:
XXXXX
Tatal Q'ty:
XXXXX
無鉛
Lead Free
BAG LEBAL,INSIDE BOX & CARTON LABEL
ORDER INFORMATION
Part Number
FS276LF-A
Operating Temperature
-20oC to 85 oC
Package
TO-92SP-4
Description
±60G (B)
FS276LF-Bu
-20oC to 85 oC
TO-92SP-4
±08G (B)
TO-92SP-4
±100G (B)
FS276LF-C
o
o
-20 C to 85 C
Rev0.2 Nov. 09, 2004(LF)
P12/FS276