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PDF TB6556FG Data sheet ( Hoja de datos )
| Número de pieza | TB6556FG | |
| Descripción | 3-Phase Full-Wave Sine-Wave PWM Brushless Motor Controller | |
| Fabricantes | Toshiba | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TB6556FG (archivo pdf) en la parte inferior de esta página. Total 22 Páginas | ||
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TOSHIBA Bi-CMOS Integrated Circuit Silicon Monolithic
TB6556FG
TB6556FG
3-Phase Full-Wave Sine-Wave PWM Brushless Motor Controller
The TB6556FG is designed for motor fan applications for three-phase brushless DC (BLDC) motors.
Features
Sine-wave PWM control
Built-in triangular-wave generator
(Carrier cycle = fOSC/252 (Hz))
Built-in lead angle control function (0° to 58° in 32 steps)
External setting/automatic internal setting
Built-in dead time function (setting 1.9 μs or 3.8 μs)
Overcurrent protection signal input pin
Built-in regulator (Vrefout = 5 V (typ.), 30 mA (max))
Operating supply voltage range: VCC = 6 V to 10 V
Weight: 0.63 g (typ.)
1 2012-10-22
Free Datasheet http://www.Datasheet4U.com
1 page  
TB6556FG
Pin Description
Lead angle setting signal
input pin
0 V: 0°
5 V: 58°
(5-bit AD)
Symbol
Input/Output Signal
When LA is fixed externally, connect
LL to GND and UL to Vrefout, and then
input the setting voltage to the LA pin.
Input voltage range: 0 V to 5.0 V
(Vrefout)
LA
Input voltage of Vrefout or higher is
clipped to Vrefout.
When LA is fixed automatically, open
the LA pin. In this state, the LA pin is
used only for confirmation of LA width.
Input/Output Internal Circuit
VCC
100 Ω
Automatic LA
circuit
Gain setting signal input
(LA setting)
Gin
Gout
Non-inverted amplifier
25 dB (max)
Gout output voltage
LOW: GND
HIGH: VCC − 1.7 V
VCC
100 Ω
Gin
VCC
Gout
Idc To peak
hold circuit
Peak hold
(LA setting)
Connect the peak-hold capacitor and
PH
discharge resistor to GND, parallel to
each other.
100 kΩ/0.1μF recommended
VCC
100 Ω
100 Ω
Low-pass filter
(LA setting)
Connect the low-pass filter capacitor
LPF Built-in 100 kΩ (typ.) resistor
0.1μF recommended
VCC
100 kΩ
100 Ω
Lower limit for LA
Clip lower limit for LA
LL LL = 0 V to 5.0 V
When LL UL, LA is fixed at LL value.
VCC
100 Ω
5 2012-10-22
Free Datasheet http://www.Datasheet4U.com
5 Page 
TB6556FG
Functional Description
1. Basic operation
The motor is driven by the square-wave turn-on signal based on a positional signal. When the positional
signal reaches frequency f = 5 Hz or higher, the rotor position is estimated according to the positional
signal and a modulation wave is generated. The modulation wave and the triangular wave are compared;
then the sine-wave PWM signal is generated and the motor is driven.
From start to 5 Hz: When driven by square wave (120° turn-on) f = fOSC / (212 32 6)
5 Hz or higher: When driven by sine-wave PWM (180° turn-on);
when fOSC = 4 MHz, approx. 5 Hz
2. Select drive function
This function can select drive mode.
SS pin
HIGH or OPEN = Sine-wave PWM drive (180° turn-on mode)
LOW = Square-wave drive (120° turn-on mode)
Note: If the position sensing signal is f = 5 Hz or lower, the driver is 120° turn-on mode even when SS =
HIGH.
3. Ve voltage command signal function and function to stabilize bootstrap voltage
(1) When the voltage command signal is input at Ve ≤ 1.0 V:
Turns off output (gate protection)
(2) When the voltage command signal is input at 1.0 V Ve ≤ 2.1 V:
Turns on the lower transistor at the regular (carrier) cycle. (ON duty is approx. 8%.)
(3) When the voltage command signal is input at Ve 2.1 V:
During sin-wave drive, outputs drive signal as it is. During square-drive, forcibly turns on the lower
transistor at regular (carrier) cycle. (ON duty is approx. 8%)
Note: At startup, turn the lower transistor on for a fixed time with 1.0 V Ve ≤ 2.1 V to charge the
upper transistor gate power supply.
PWM Duty
100%
(1) (2) (3)
1.0 V
2.1 V
5.4 V
Ve
4. Dead time function: upper/lower transistor output off-time
When the motor is driven by sine-wave PWM, dead time is digitally generated in the IC to prevent a
short circuit caused by the simultaneous turning on of upper and lower external power devices. When a
square wave is generated in full-duty cycle mode, the dead time function is turned on to prevent a short
circuit.
Td Pin
HIGH or OPEN
LOW
Internal Counter
8/fOSC
16/fOSC
TOFF
1.9 μs
3.8 μs
TOFF values above are obtained when fOSC = 4.19 MHz.
fOSC = reference clock (ceramic oscillation)
11
2012-10-22
Free Datasheet http://www.Datasheet4U.com
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet TB6556FG.PDF ] | |
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