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M63151FP
Polygon Scanner Motor Driver (DMOS Driver)
REJ03F0028-0100Z Rev.1.0 Sep.16.2003
Description
The M63151FP is a driver and controller for use with three-phase brushless motor. A DMOS element with high withstand voltage and low levels of switching loss is used on each output. Acceleration and deceleration inputs are operable at TTL levels.
Features
* * * * * * * Power-supply voltage (max.): 30 V Output current (max.): 2.5 A RDS (typ.): 140 (total of the upper and lower DMOS FETs) Built-in chip circuit for preventing through current in commutation Built-in chip comparator for current detection Buil-in chip overheating protection circuit Built-in chip motor-lock protection circuit
Applications
* OA equipment such as LBPs, copiers, and fax machines
Block diagram
Hw Hv Hu
PS Vboot
TEST Hw-
Hw+
Hv+ HvHu-
Hu+
VCC
Regulator 12V / 6V
VREG
cp2
cp1
Frequency Generator
Power Save
TSD
HallAmp
Pre - driver
Synhro-PWM
RLP CRLP
Motor Lock Protection
MOTOR ON/OFF
U V W
PWM
PWM ON/OFF
M
Charge Pump
/ACC /DEC RCP CPout Pref Rfc Cfc RNF RS GND
Rev.1.0, Sep.16.2003, page 1 of 13
M63151FP
Pin Functions
VCC VREG CP2 Vboot NC W V
1 2 3 4 5 6 7 8 9 10 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22
Pref CPout /ACC /DEC RLP CRLP TEST PS
GND
11 12 13
GND
N.C. RS U RNF GND N.C. HwHw+
14 15 16 17 18 19 20 21
N.C. Cfc Rfc RCP Hu+ HuHv+ Hv-
Package outline (42P9R)
Description of Pin Functions
Pin No. 1 2 3 4 5 6 7 8 9 to 13 14 15 16 17 18 19 20 21 Pin Name VCC VREG cp2 cp1 Vboot N.C. W V GND N.C. Rs U Rss GND N.C. HwHw+ Description Motor power supply Internal power supply Pin 2 for connection of the step-up voltage capacitor Pin 1 for connection of the step-up voltage capacitor Stepped-up voltage power-supply (internal) Open W-phase drive output V-phase drive output Ground Open Output of detected current U-phase drive output Current detection Ground Open Hall signal input pin Hall signal input pin Pin No. 42 41 40 39 38 37 29 36 35 30 to 34 28 27 26 25 24 23 22 Pin Name Pref CPout / ACC / DEC RLP CRLP N.C. TEST PS GND Cfc Rfc RCP Hu+ HuHv+ HvDescription PWM control voltage input Charge-pump output Input: request for acceleration Input: request for deceleration Resistor connection pin for lock protection Capacitor connection pin for lock protection Open Test pin (Tj detection) Power-save switchover Ground For connecting the resistor used to set the PWM cycle For connecting the capacitor used to set the PWM cycle Charge-pump output current setting Hall signal input pin Hall signal input pin Hall signal input pin Hall signal input pin
Rev.1.0, Sep.16.2003, page 2 of 13
M63151FP
Absolute Maximum Ratings
(Ta = 25C)
No. 1 2 3 4 5 Item Power-supply voltage Output current Hall-sensor amp. differential input range Voltage on input pins Allowable dissipation Symbol Vcc lpeak VHA Vin Pd Rated Value 30 3.0 4.5 Unit V A V V W Remarks
-0.3 to 7
2.5
/ ACC, / DEC, / PS, Pref During start-up at Ta = 60C, with the device mounted on an iron substrate
6 7 8 9
Parameter for thermal derating Conjunction temperature Ambient temperature during operation Temperature during storage
K Tj Ta Tstg
25 150
mW / C C C C
-20 to
+75
-40 to
+125
Thermal derating
6.0
Allowable power dissipation (Pdp)
(W)
With the A-type board: 4.7 W With the B-type board: 3.4 W
5.0 4.0
With the C-type board: 2.8 W
3.0 2.0 1.0
0
Note:
25
50
75
100
125
150
(C)
Ambient Temperature (Ta)
The large values for allowable power dissipation make it possible to use this device without a heat sink. At the very least, dissipation of 2.8 W is possible with a glass-epoxy single-layered board, and 4.7 W is obtained by applying special design measures to the board. For details on the configurations of boards A, B, and C, refer to `Boards used in the evaluation of thermal dating' on page 11.
Rev.1.0, Sep.16.2003, page 3 of 13
M63151FP
Electrical Characteristics (DC)
(Unless otherwise noted, Ta = 25C, Vcc = 24 V)
Item Output DMOS on-resistance Power-supply voltage range Circuit current with no signal RNF pin threshold voltage PREF threshold voltage /ACC input current H /ACC input current L /DEC input current H /DEC input current L Acceleration current Deceleration current Detent current CPout output voltage range Symbol RDS Vcc lcc VRNF Vpref IACCH IACCL IDECH IDECL ISS ISD IZ VCPout Rated Values Min. -- 21.6 -- 212 1.00 -1.0 -50 -- -50 -240 160 -100 0.85 Typ. 1.40 24.0 5.4 250 1.25 -- -10 250 -10 -200 200 0 -- Max. 2.20 26.4 10.0 288 1.50 1.0 -- 500 -- -160 240 +100 3.90 Unit Conditions of Measurement and Remarks Total of on-resistance for upper and lower DMOS FET Iout = 1.0 A PS = 0 V PREF voltage that satisfies RS current > 1 mA / ACC = 5V / ACC = 0V / ACC = 5V / ACC = 0V / ACC = Lo, / DEC = Hi, Rcp = 12K at CPout = 2.0 V / ACC = Hi, / DEC = Lo, Rcp = 12K at CPout = 2.0 V / ACC =5V, / DEC = Hi or Lo, at CPout =2.0 V Less than the min. rated value when / ACC = 5 V, / DEC = 0 V; More than the max. rated value when / ACC = 0 V, / DEC = 5 V
V mA mV V
A A A A A A nA
V
Output leakage current Hall-sensor amp. same-phase input voltage range Hall-sensor amp input current Hall-sensor amp input voltage hysteresis Hall-sensor amp. min. input amplitude for operation
I leak VHA1 IHA Vhys VHA2
-100 1.5 -- 6.95 50
0 -- 0.5 11.0 --
100 Vcc-2 4.0 15.45 --
A
V A mV mV H+ = H, Hv+ = Hv, Hw+ = Hw- Between H+ and H-, Hv+ and Hv-, and HW+ and HWBetween H+ and H-, Hv+ and Hv-, and Hw+ and Hw-; The amplitude that satisfies phase delay < 5 deg for the above variation of hysteresis voltage Pref = 2.5 V
PREF input current
IPref
-100
10
100
nA
Rev.1.0, Sep.16.2003, page 4 of 13
M63151FP
Electrical Characteristics (AC)
(Unless otherwise noted, Ta = 25C, Vcc = 24 V)
Item Delay from turning on to output Delay from turning off to output Frequency of Fc oscillation Time for motor-lock protection to operate Time to resume after motor-lock protection Symbol Tdon Tdoff Fc TML - ON Rated Values Min. -- -- 17.3 10.0 Typ. 1.0 0.5 21.6 -- Max. 1.5 1.0 25.9 20.0 S S KHz SEC When RfC = 24 K , Cfc = 470 pF Between RLP and CRLP, 4.7 M, between CRLP and GNDE, 1 F, load for resistors U, V, W: 2R = 10 As above Unit Measurement Conditions and Remarks
TML - OFF
10.0
--
20.0
SEC
Items for Confirmation in Evaluation
Item Overheating shutdown operating temperature Overheating shutdown temperature hysteresis Symbol TSG - ON TSD - OFF Rated Values Min. -- -- Typ. 160 30 Max -- -- C C Temperature for resumption after reaching the shutdown operating temperature Unit Measurement Conditions and Remarks
Note: Operation of the device within the above TSD operating temperature range is not guaranteed. The guaranteed operation range of the device is up to Tjmax, that is, the absolute max. rating. The TSD operation is thus activation of the thermal protection circuit when Tjmax has been exceeded by mistake. Accordingly, the device must be operated at Tj = 150C or below.
Rev.1.0, Sep.16.2003, page 5 of 13
M63151FP
Precautions during Use
Protection from overheating: The impedance between the power supply and output pins of the circuit board is low when the IC is in use. Contingencies such as the application of excessive voltage by voltage surges may lead to short-circuits forming between the output pins of the IC can lead to damage which includes destruction of the TSD module. The chip is then liable to catch fire. Accordingly, we strongly recommend that you consider the application of safety measures such as fuses. Dissipation of heat: Sufficient thermal evaluation must be performed before changes to the thermal environment (including power-supply voltage, output current, the circuit board, etc.). The new design must be brought within the margins for thermal dissipation. Also, note that a higher carrier frequency setting leads to a larger level of IC-internal switching loss. Wiring on the board: Within the IC, the output current flows through the current-sense resistor (in the 0.17- level), and current control is applied when a fall in this voltage is detected. Also, since the flow of output current is for a high-speed switching operation, take care to avoid the generation of crosstalk between the wiring which carries the current and the wiring which is connected to the high-impedance input pins (Hall output), etc. The motor-lock protection circuit: Holding of the motor by some external or other factor leads to a continuous flow of the maximum current to the IC. The IC is thus equipped with a module that detects this condition; at specified intervals after the condition has been detected, the module stops the flow of current to the motor and automatically attempts to resumes operation. The time constant set by the resistor and capacitor which are externally connected to pins 37 and 38 determines the time from when the maximum current begins to flow until the motor is stopped; the same R and C values set the time from stopping to restarting of the motor. Make sure that the specified interval is longer than the time the motor takes to start up. When the motor characteristics and setting for maximum current are such that the maximum current is exceeded when the duty cycle is 75% (RS voltage high period: low period = 3:1) or more, the IC judges that the maximum current is not continuously flowing. In such a case, this protection circuit does not operate. If the IC junction temperature rises before or during the operation of this protective circuit, the overheat-protection circuit operation takes precedence. Short circuits between output pins and adjacent pins This IC does not incorporate protection against short-circuits between pins. An attempt to output a current while there is a short-circuit between an output and VCC or ground, an output and VREG, or VCC and VREG may cause an overcurrent to flow; this may adversely affect the IC.
Rev.1.0, Sep.16.2003, page 6 of 13
M63151FP
M63151FP PWM control method
A triangular waveform is output on the CFC pin under the control of the values of the external capacitor connected to Cfc and the external resistor connected to Rfc. The PWM duty cycle is determined through comparison of this voltage with the control voltage determined by the current output from CPout and the external filter connected to the CPout and PREF pins, i.e. the voltage on PREF. That is, PWM-ON is satisfied when the triangular waveform is at a level below the control voltage and PWM-OFF is satisfied (regenerative) when the triangular waveform rises above the control voltage. How the relation between the voltages on Cfc and Pref determines the output voltage is depicted below.
VPREF Operating range Min.0.85 V less to max.4.00 V or more (a) When VPREF < 1.25 V, PWM duty cycle = 0% (always regennerative) (b) When1.25 V < VPREF < 3.75 V, PWM control (c) When3.75 V < VPREF, PWM duty cycle =100% Cfc output waveform rage Peak = 3.75 V Trough = 1.25 V (a) Minimum voltage: 1.25 V 0.25 V (b) Maximum voltage: 3.75 V 0.25 V VPREFthrehold voltage (VtPREF) 1.25V 0.25 V (a) When VPREF< VtVPREF, motor ison (b) When VPREF< VtVPREF, motor is always off.
Cfc output voltage VPREF (control voltage)
PREF threshold voltage
PWM - Duty cycle High:PWM - ON Low:PWM - OFF
While the motor is rotating, the Cfc output voltage is driven low with the same timing as switching of phase for the motor in order to improve changes in the rotation speed. Therefore, the voltage waveform output on Cfc during actual motor operation is as shown in the following figure.
Phase U Phase V Phase W The hold line shows the PWM output voltage wavform. The dashed lines indicate the timing of phase switching.
3.75 V VPREF Cfc output voltage 1.25 V 0V
Rev.1.0, Sep.16.2003, page 7 of 13
M63151FP
Motor-Lock Protection Circuit (1)
As well as the overheating protection function, this IC incorporates a module that turns off current to the motor after the motor has been mechanically held over a specified period. This prevents overheating. The operating conditions of this module and a timing chart that depicts its operation are given below. Note, however, that when the IC does become overheated, the overheating protection circuit still operates because it takes precedence over the lock protection function. (1) Conditions of operation (a) The RS current detection resistor detects a continuous flow of the limit current (in practice, the current-limiting circuit leaves the IC operating as long as the voltage on RS stays within the range 0 to 0.25 V). (b) Normally, the period at 0 V in item (a) will be 3.5 s, and this is approximately equal to the period at 0.25 V. However, this circuit does not operate when motor characteristics, etc. mean that the period at 0.25 V is three times the period at 0 V (duty cycle = 75%) or longer. (c) The period of the lock-protection circuit operations (the period from locking of the motor to the time when current to the motor is stopped) is determined by the time constant set up by the capacitor and resistor externally connected to pins 37 (CRLP) and 38 (RLP). (d) After the motor has been turned off, automatic resumption is attempted at a time determined by the same R and C values as in point (c). External signals are not accepted until resumption. (2) Block diagram
VREG(6V) I1 Comp1 A RNF 17 + 0.25V 1V C1 + Comp2
VREG
Current - Limiting control signal
RFP 38 R=4.7M CRLP
Hi: PWM-ON Lo: PWM-OFF (Regeneration)
+ Lock protection 5.4V or 4V circuit control signal 1.2 Comp4 Hi: Normal operation Low: MOTOR - lock protection circuit 0.25V RNF 0 POINT A 4V 1V Comp3
37 C=1F
Current limiting control signal
Comp3 output CRLP Lock protection circuit Currnt flows to control signal the motor Initiation Flow of current to the motor stops 0 5.4V 1.2V Currnt flows to the motor 0.7V
When the maximum current no longer flows to the RNF, the CRLP voltage is driven low to cancel the protective finction.
Rev.1.0, Sep.16.2003, page 8 of 13
M63151FP
Motor Lock Protection Circuit (2)
The time intervals in the block diagram on the previous page are set up in the following ways. (1) Current-limiting control signal low period The flow of the limiting current to the RNF pin is detected, and the motor is regenaratively operated over the period indicated below:
Toff = C1 x V1 / LI = 17.5pF x 1V / 6.25 A = 2.8 s
Note, however, that a delay time of about 0.5 s from the time when the high-side or low-side of a phase is turned off to the time when the output of the opposite side is turned on is set in the pre-drive stage of output. This prevents through current to and from upper and lower transistors within the same phase. Accordingly, the output voltage off period (regenerative time) is 0.5 s plus the result of the above calculation, which is about 3.3 s.
(2) Operation time of the motor-lock protection circuit The following equation gives the time from locking of the motor to stoppage of current flow.
TML-ON = C x R x ln ((Vreg - R x I) / ((Vreg - R x I) - V3)) = 1 F x 4.7 M x ln ((6 V - 4.7 M x 17 nA / ((6 V - 4.7 M x 17 nA) - 5.4V)) = 11.42 s
Similarly, the period from the time when the motor is turned off to automatic resumption is:
TML-OFF = C x R x ln ((V3 - 0.7 V - R x I) / (V4-7V)) = 1 F x 4.7 M x ln (5.4 V - 0.7 V - 4.7 M x 17 nA / 1.2 V - 0.7 V) = 10.45 s
Rev.1.0, Sep.16.2003, page 9 of 13
M63151FP
Timing chart: motor output current / Hall input
Note: Hall sennsor input. Bold lines are positive phase.
Hall sensor input Output voltage (Duty cycle = 100%)
Hu+ Hu- Hv- Hv+ Hw+ Hw-
Outward flow U Inward flow Outward flow V Inward flow Outward flow W Inward flow
Output voltage (Duty cycle = 30%)
Outward flow U Inward flow Outward flow V Inward flow Outward flow W Inward flow
0 180 360 540 Inward flow QE (degrees) 720
* : The above waveforms represent the tinming, and are not the same a the waveforms seen in actual operation of the motor.
Rev.1.0, Sep.16.2003, page 10 of 13
M63151FP
Boards used in the evaluation of thermal derating
Board material
layer 1 [TOP view]
Glass-epoxy FR - 4
1 42
layer 2 [rear view]
Size
70 x 70 mm
A - Typeboard
thickness
t = 1.6 mm
1&2 layer
[layer 2]
21 22
material: cupper thichness: t = 18 m
1
42
B - Typeboard
[layer 2]
21 22
1
42
C - Typeboard
[layer 1]
21 22
POWER-SSOP
TOP VIEW BOTTOM VIEW
mounted
Evaluation board
Rev.1.0, Sep.16.2003, page 11 of 13
M63151FP
Sample circuit application
100F
1 VCC
PREF 42
0.03F
24V
2 VREG CPOUT41
300 K
3 CP2 /ACC 40
0.33F
0.01F
4 CP1
/ D E C 39
0.1F
5 Vboot
RLP 38
4.7M
6 N.C. CRLP 37
1.0F
7W
TEST 36
8V
PS 35
0.167
14 N.C.
N.C. 29
470pF
15 RS Cfc 28
16 U
Rfc 27
1K
17 RNF RCP 26
24K
100pF
18 GND HU+ 25
12K
HW
19 N.C.
HU- 24
20 HW-
HV+ 23
HV
21 HW+ HV - 2 2
HU
Rev.1.0, Sep.16.2003, page 12 of 13
M63151FP
42P9R-C
JEDEC Code - e b2 Weight(g) - Lead Material Cu Alloy
MMP
Plastic 42pin 450mil HSSOP
Package Dimensions
EIAJ Package Code HSSOP42-P-450-0.8
42 22
HE
E
L1
L
Rev.1.0, Sep.16.2003, page 13 of 13
F Recommended Mount Pad
21
1
Symbol A
G
D
e y x
M
b
A2
A1
c
z Detail G Detail F
Z1
e1
A A1 A2 b c D E e HE L L1 z Z1 x y b2 e1 I2
Dimension in Millimeters Min Nom Max - - 2.2 0 0.1 0.2 - - 2.0 0.27 0.32 0.37 0.23 0.25 0.3 17.5 17.3 17.7 8.4 8.6 8.2 - - 0.8 12.23 11.93 11.63 0.7 0.5 0.3 - - 1.765 - - 0.75 - 0.9 - - - 0.16 - - 0.1 - 0 10 - - 0.5 - - 11.43 - - 1.27
l2
Sales Strategic Planning Div.
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