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PDF LB11697V Data sheet ( Hoja de datos )
| Número de pieza | LB11697V | |
| Descripción | Monolithic Digital IC Brushless Motor Driver IC | |
| Fabricantes | Sanyo Semicon Device | |
| Logotipo |  |
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Ordering number : ENN8412A
www.DataSheet4U.com
SANYO Semiconductors
DATA SHEET
Monolithic Digital IC
LB11697V Brushless Motor Driver IC
Overview
The LB11697V is a direct PWM drive predriver IC designed for three-phase power brushless motors. A motor driver
circuit with the desired output power (voltage and current) can be implemented by adding discrete transistors in the
output circuits. Furthermore, the LB11697V provides a full complement of protection circuits allowing it to easily
implement high-reliability drive circuits. Note that the LB11697V is a modified version of the LB11696V in which the
output logic has been optimized for 12 V system motors. This allows the number of external components to be reduced
in application circuits.
Features
• Three-phase bipolar drive
• Direct PWM drive (controlled either by control voltage or PWM variable duty pulse input)
• Built-in forward/reverse switching circuit
• Start/stop mode switching circuit (stop mode power saving function)
• Built-in input amplifier
• 5 V regulator output (VREG pin)
• Current limiter circuit (Supports 0.25 V (typical) reference voltage sensing based high-precision detection)
• Undervoltage protection circuit (The operating voltage can be set with a zener diode)
• Automatic recovery type constraint protection circuit with protection operating state discrimination output (RD pin)
• Four types of Hall signal pulse outputs
• Supports thermistor based thermal protection of the output transistors
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer's products or
equipment.
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
32207 TI PC / 12006 MH OT B8-9000 No.8412-1/14
1 page  
Pin Assignment
LB11697V
www.DataSheet4U.com
VCC VREG LVS N2 N1 HP F/R PWMIN S/S CSD RD PWM TOC EI– EI+
30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
LB11697V
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
GND RFGND RF WH WL VH VL UH UL IN1– IN1+ IN2– IN2+ IN3– IN3+
Top view
Pin Functions
Pin No. Symbol
1 GND Ground
Pin Description
VREG
Equivalent circuit
2
RF
GND
Output current detection reference
Connect the ground terminal of the external resistor RF to
this pin.
2
Output current detection
Connect a resistor with a small value between this pin and
3 RF RFGND.
This sets the maximum output current IOUT to be 0.25/Rf.
VREG
3
Outputs (External transistor drive outputs)
4 WH These are the PWM outputs used for duty control.
6
8
VH
UH
These are push-pull outputs.
VCC
50 kΩ
468
Continued on next page.
No.8412-5/14
5 Page 
LB11697V Functional Description
LB11697V
www.DataSheet4U.com
1. Output Drive Circuit
The LB11697V adopts direct PWM drive to minimize power loss in the outputs. The output transistors are always
saturated when on, and the motor drive power is adjusted by changing the on duty of the output. The output PWM
switching is performed on the UH, VH, and WH outputs. The output PWM switching is performed using the UH,
VH, and WH outputs, which are external low side transistor drive outputs. Since the reverse recovery time for the
diodes connected to the non-PWM side outputs can be a problem, care is required in selecting these diodes. (If
diodes with a short reverse recovery time are not used, through currents will flow at the instant the PWM side
transistors are turned on.)
2. Current Limiter Circuit
The current limiter circuit limits the output current peak value to a level
determined by the equation I = VFR/Rf (VRF = 0.25 V typical, Rf:
current detection resistor). This circuit suppresses the output current by
reducing the output on duty.
To the RF pin
Current
detection
resistor
High-precision detection can be implemented by connecting the lines
from the RF and RFGND pins close to the two terminal of the current detection resistor Rf.
The current limiter circuit includes an internal filter circuit to prevent incorrect current limiter circuit operation due
to detecting the output diode reverse recovery current due to PWM operation. Although there should be no problems
with the internal filter circuit in normal applications, applications should add an external filter circuit (such as an RC
low-pass filter) if incorrect operation occurs (if the diode reverse recovery current flows for longer than
1 µs).
3. Power Saving Circuit
This IC goes to a low-power mode (power saving state) when set to the
stop state with the S/S pin. In the power saving state, the bias currents in
most of the circuits are cut off. However, the 5 V regulator output
(VREG) is still provided in the power saving state. If it is also necessary
to cut the Hall device bias current, this function can be provided by an
application that, for example, connects the Hall devices to 5 V through
PNP transistors.
To the VREG pin
To the S/S pin
Hall
device
4. Notes on the PWM Frequency
The PWM frequency is determined by the capacitor C (F) connected to the PWM pin.
fPWM ≈ 1/(22500 × C)
If a 2000 pF capacitor is used, the circuit will oscillate at about 22 kHz. If the PWM frequency is too low, switching
noise will be audible from the motor, and if it is too high, the output power loss will increase. Thus a frequency in
the range 15 to 50 kHz must be used. The capacitor's ground terminal must be placed as close as possible to the IC’s
ground pin to minimize the influence of output noise and other noise sources.
5. Control Methods
The output duty can be controlled by either of the following methods
• Control based on comparing the TOC pin voltage to the PWM oscillator waveform
The low side output transistor duty is determined according to the result of comparing the TOC pin voltage to the
PWM oscillator waveform. When the TOC pin voltage is 1.4 V or lower, the duty will be 0%, and when it is 3.0 V
or higher, the duty will be 100%.
Since the TOC pin is the output of the control amplifier (CTL), a control voltage cannot be directly input to the
TOC pin. Normally, the control amplifier is used as a full feedback amplifier (with the EI- pin connected to the
TOC pin) and a DC voltage is input to the EI+ pin (the EI+ pin voltage will become equal to the TOC pin voltage).
When the EI+ pin voltage becomes higher, the output duty increases. Since the motor will be driven when the EI+
pin is in the open state, a pull-down resistor must be connected to the EI+ pin if the motor should not operate when
EI+ is open.
When TOC pin voltage control is used, a low-level input must be applied to the PWMIN pin or that pin connected
to ground.
No.8412-11/14
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet LB11697V.PDF ] | |
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