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PDF TB67H303HG Data sheet ( Hoja de datos )
| Número de pieza | TB67H303HG | |
| Descripción | Full Bridge Driver IC | |
| Fabricantes | Toshiba | |
| Logotipo |  |
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TOSHIBA BiCD Integrated Circuit Silicon Monolithic
TB67H303HG
TB67H303HG
Full Bridge Driver IC for DC motor
The TB67H303HG is a full bridge driver IC for DC motor
adopting MOS in output transistor.
High-power and high-efficient drive is possible by adopting
DMOS output driver with low-ON resistance and PWM drive.
TB67H303HG
Features
• Full bridge driver IC for DC motor
• Ron (upper + lower) = 0.2Ω (typ.)
HZIP25-P-1.00F
• CW/CCW/Short brake/Stop functions
• Standby function
Weight
HZIP25-P-1.00F: 7.7g (typ.)
• PWM control (Direct PWM or Constant-current PWM drive)
• Output withstand voltage : Vcc = 50 V
• Output current
: IOUT = 10.0 A (Absolute maximum ratings, peak)
IOUT =8.0 A (operating range, maximum value)
• Package
: HZIP25-P-1.00F
• Built-in input pull-down resistance
: 100 kΩ (typ.)
• Output monitor pin (monitor for TSD/ISD) : ALERT1 pin (IALERT1 (max) = 1 mA)
• Output monitor pin (monitor for UVLO)
: ALERT2 pin (IALERT2 (max) = 1 mA)
• Single power supply
• Built-in thermal shutdown (TSD) circuit
• Built-in under voltage lock out (UVLO) circuit
• Built-in over-current detection (ISD) circuit
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TB67H303HG
Selection of direct PWM and constant-current PWM
SELECT = L: operating direct PWM, SELECT = H: operating constant-current PWM
(1) In case of direct PWM:
・RSA and RSB should be connected to PGND each.
・Vref should be connected to SGND.
(2) In case of constant-current PWM:
・Connect RSA and RSB and then connect to the current detection resistance (RNF).
・Configuration of output current is as follows;
Io = (1/3 × Vref) ÷ RNF
This system adopts peak current detection. Average current is lower than setting current.
Set RNF and Vref as follows; 0.055Ω ≤ RNF ≤ 0.25Ω, 0.3V ≤ Vref ≤ 1.95V
Triangle wave is generated internally by CR oscillation by connecting external resistor to OSC terminal.
Rosc should be from 30kΩ to 120kΩ. The relation of Rosc and fchop is shown in below table and figure. The
values of fchop of the below table are design guarantee values. They are not tested for pre-shipment.
Rosc(kΩ)
fchop(kHz)
Min Typ. Max
30 - 60 -
51 - 40 -
120 - 20 -
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TB67H303HG
ALERT output
(1) ALERT 1 (Pin No. 1)
ALERT 1 terminal outputs in detecting either TSD or ISD.
ALERT terminal is connected to power supply externally via pull-up resistance. Spec. is shown below.
VALERT = 0.5V (max) at 1mA
TSD
ISD ALERT
Under TSD detection
Normal
Under TSD detection
Normal
Under ISD detection
Under ISD detection
Normal
Normal
Low
Z
Applied voltage to pull-up resistance is up to 5.5 V. And conducted current is up to 1 mA.
The voltage of 5 V is recommended to be provided by connecting the external pull-up resistance to Vreg
pin.
(2) ALERT 2 (Pin No. 25)
ALERT 2 terminal outputs in detecting UVLO.
ALERT 2 terminal is connected to power supply externally via pull-up resistance. Spec. is shown below.
VALERT = 0.5V (max) at 1mA
UVLO
ALERT
Under UVLO detection
Normal
Low
Z
When Vcc falls to 6.0V (typ.) and UVLO is enabled, output turns off and ALERT 2 outputs low. In case
Vcc falls below 6.0V (typ.), ALERT 2 outputs Hi-Z (High impedance).
The operation returns from Standby mode when Vcc rises 6.5V (typ.) or more.
Applied voltage to pull-up resistance is up to 5.5 V. And conducted current is up to 1 mA.
The voltage of 5 V is recommended to be provided by connecting the external pull-up resistance to Vreg
pin. (To pull-up resistance)
(To Vreg in the IC)
Voltage pull-up of ALERT 1 and ALERT 2 pins
･It is recommended to pull-up the voltage to Vreg pin.
･In case of pulling up the voltage of except 5 V (for instance, 3.3 V etc.), it is recommended to use other power
supply (ex. 3.3 V) while Vcc outputs within the operation range. When Vcc decreases lower than the operation
range and Vreg decreases from 5 V to 0 V under the condition that other power supply is used to pull-up voltage,
the current continues to conduct from other power supply to the IC inside through the diode shown in the figure.
Though this phenomenon does not cause destruction and malfunction of the IC, please consider the set design not
to continue such a state for a long time.
･As for the pull-up resistance for MO and ALERT pins, please select large resistance enough for the conducting
current so as not to exceed the standard value of 1 mA.
Please use the resistance of 30 kΩ or more in case of applying 5 V, and 20 kΩ or more in case of applying 3.3 V.
11 2014-03-17
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet TB67H303HG.PDF ] | |
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