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PDF TB6556F Data sheet ( Hoja de datos )
| Número de pieza | TB6556F | |
| Descripción | 3-Phase Full-Wave Sine-Wave PWM Brushless Motor Controller | |
| Fabricantes | Toshiba Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TB6556F (archivo pdf) en la parte inferior de esta página. Total 22 Páginas | ||
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TOSHIBA Bi-CMOS Integrated Circuit Silicon Monolithic
TB6556F/FG
TB6556F/FG
3-Phase Full-Wave Sine-Wave PWM Brushless Motor Controller
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 2.6 µs or 3.8 µs)
• Supports bootstrap circuit
• 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: 0.33 g (typ.)
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TB6556FG:
TB6556FG is a Pb-free product.
The following conditions apply to solderability:
*Solderability
1. Use of Sn-63Pb solder bath
*solder bath temperature = 230˚C
*dipping time = 5 seconds
*number of times = once
*use of R-type flux
2. Use of Sn-3.0Ag-0.5Cu solder bath
*solder bath temperature = 245˚C
*dipping time = 5 seconds
*the number of times = once
*use of R-type flux
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TB6556F/FG
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
et4U.com
Peak hold
(LA setting)
Connect the peak-hold capacitor and
PH
discharge resistor to GND, parallel to
each other.
100 kΩ/0.D1µaFtareScohmemeet4ndUe.dcom
VCC
100 Ω
100 Ω
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Low-pass filter
(LA setting)
Connect the low-pass filter capacitor
LPF (built-in 100 kΩ 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
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TB6556F/FG
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 number of rotations 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~: 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.DataSheet4U.com
PWM Duty
100%
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(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 (crystal oscillation)
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| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet TB6556F.PDF ] | |
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