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PDF LB11693H Data sheet ( Hoja de datos )
| Número de pieza | LB11693H | |
| Descripción | Monolithic Digital IC 3-Phase Brushless Motor Driver | |
| Fabricantes | Sanyo Semicon Device | |
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Ordering number : ENA0287
www.DataSheet4U.com
LB11693H
Monolithic Digital IC
3-Phase Brushless Motor Driver
for 24V Fan Motors
Overview
The LB11693H reduces motor noise by imparting a slope to the output current when switching the phase to which power
is applied. This motor driver includes an automatic recovery constraint protection circuit and is optimal for driving 24V
fan motors.
Functions
• Soft phase switching + direct PWM drive
• PWM control based on both a DC voltage input (the CTL voltage) and a pulse input
• Provides a 5 V regulator output
• One Hall-effect sensor FG output
• Integrating amplifier
• Automatic recovery constraint protection circuit (on/off = 1/14), RD output
• Current limiter circuit
• LVSD circuit
• Thermal protection circuit
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Supply voltage range
Output current
Allowable power dissipation 1
VCC max
IO max
Pd max1
T ≤ 500mS
Independent IC
Allowable power dissipation 2
Operating temperature
Pd max2
Topr
When mounted on a circuit board *
Storage temperature
Tstg
*: On the specified circuit board (114.3mm×76.1mm×1.6mm, glass epoxy)
Ratings
30
1.8
0.9
2.1
-30 to +100
-55 to +150
Allowable Operating Ranges at Ta = 25°C
Parameter
Supply voltage rang
Constant voltage output current
RD output current
FG output current
Symbol
VCC
IREG
IRD
IFG
Conditions
Ratings
9.5 to 28
0 to -30
0 to 10
0 to 10
Unit
V
A
W
W
°C
°C
Unit
V
mA
mA
mA
Any and all SANYO Semiconductor products described or contained herein do not have specifications
that can handle applications that require extremely high levels of reliability, such as life-support systems,
aircraft's control systems, or other applications whose failure can be reasonably expected to result in
serious physical and/or material damage. Consult with your SANYO Semiconductor representative
nearest you before using any SANYO Semiconductor products described or contained herein in such
applications.
SANYO Semiconductor assumes no responsibility for equipment failures that result from using products
at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition
ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor
products described or contained herein.
92706 / 21306 MS OT 20051228-S00001 No.A0287-1/24
1 page  
LB11693H
Pin Function
Pin No.
34
36
2
Symbol
OUT1
OUT2
OUT3
Description
Motor drive output
4
GND2
Motor drive output system ground
7 VD Low side output transistor drive current supply
9 VM Motor drive output power supply and output
current detection.
Connect a resistor (Rf) between this pin and VCC.
The output current is limited to a value determined
by the equation IOUT = VRF/Rf.
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Equivalent circuit
8
VCC
Power supply (Systems other than the motor drive
output)
10
VREG
5V regulator output
(control circuit power supply).
Connect a capacitor (about 0.1µF) between this
pin and ground for stabilization.
11 LVS Undervoltage protection voltage detection.
Connect this pin to VREG if the VREG level is to
be detected.
If the VCC level is to be detected, insert a zener
diode in series to set the detection level.
12
FGFIL
FG filter.
Normally, this IC will be used with this pin open.
Connect a capacitor between this pin and ground
if noise on the FG signal becomes a problem.
Continued on next page.
No.A0287-5/24
5 Page 
LB11693H
8. Forward/Reverse Switching
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The LB11693H was designed assuming that forward/reverse switching would not be performed while the motor is
operating. We recommend that the F/R pin be held fixed at either the low (forward) or high (reverse) level when the
motor is turning. Although it will be pulled up to the high level by an internal pull-up resistor (about 40kΩ) when left
open, this must be strengthened by an external resistor if fluctuations are large.
If the direction is switched while the motor is turning, large currents will flow due to the braking operation. The
LB11693H's current limiter circuit, however, cannot limit this braking current. Therefore, forward/reverse switching
during motor rotation is only possible if the braking current is limited to a value under IOmax (1.8A) by the motor coil
resistance or other circuit or phenomenon. Furthermore, since through current will flow in the high and low side
transistors at the instant the switch occurs with switching that only uses the F/R pin, applications must provide a drive
off period for switching directions. A drive off period must be provided by either setting the IC to the stopped state with
the S/S pin or setting the PWM signal to the 0% duty state with the TOC and PWMIN pins, and the F/R pin must only
be switched during that period to prevent through current.
9. Power Saving Circuit
This IC can be set to a power saving state in which current consumption is reduced by setting it to the stopped state with
the S/S pin. The bias current to most of the circuits in the IC is cut off in this power saving state. Note, however, that the
5V regulator output is still provided in the power saving state.
10. Notes on the PWM Frequency
The PWM frequency is determined by the capacitance (F) of the capacitor connected to the PWM pin.
fPWM ≈ 1/(23400×C)
A frequency in the range 15 to 25kHz is desirable for the PWM frequency. The ground side of the connected capacitor
must be connected to the GND1 pin by as short a line as possible.
11. Control Methods
The output duty can be controlled by either of the following methods.
• Comparison of the TOC pin voltage with the PWM oscillator waveform
This method determines the low side output transistor duty according to the result of comparing the TOC pin voltage
with the PWM oscillator waveform. The PWM duty will be 0% when the TOC pin voltage is under about 1.3 V and
will be 100% when that voltage is over about 3.0V.
Since the TOC pin is the output of the CTL amplifier, a control voltage cannot be directly input to the TOC pin.
Accordingly, the CTL amplifier is normally used as a full feedback amplifier (by connecting the EI− pin to the TOC
pin) and inputting a DC voltage to the EI pin (here the TOC voltage will be equal to the EI+ pin voltage). When the
EI+ pin voltage increases, the output duty will increase as well. Since the motor will be driven if the EI+ pin is in the
open state, a pull-down resistor should be connected to the EI+ pin in applications where this is not desirable.
A low level must be input to the PWMIN pin (or it must be connected to ground) if the TOC pin voltage control
system is used.
• PWMIN pulse input
A 15 to 25kHz frequency pulse signal can be input to the PWMIN pin and the low side output transistor duty can be
controlled based on the duty of that input signal. When the PWMIN pin is low, the output will be on, and when high,
the output will be off. When the PWMIN pin is open, the input will go to the high level and the output will be off.
If PWMIN pin control is used, the EI− pin must be connected to ground and the EI+ pin must be connected to the
TOC pin.
No.A0287-11/24
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet LB11693H.PDF ] | |
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