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PDF TB67H302HG Data sheet ( Hoja de datos )
| Número de pieza | TB67H302HG | |
| Descripción | Dual Bridge Driver IC | |
| Fabricantes | Toshiba | |
| Logotipo |  |
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TOSHIBA BiCD Integrated Circuit Silicon Monolithic
TB67H302HG
TB67H302HG
Dual Bridge Driver IC for DC motor
The TB67H302HG is a dual bridge driver IC for DC motor
adopting DMOS in output transistor.
High-power and high-efficient drive is possible by adopting
DMOS output driver with low-ON resistance and PWM drive.
TB67H302HG
Features
• Dual bridge driver IC for DC motor
• Ron (upper + lower) = 0.4Ω (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 = 5.0 A (Absolute maximum ratings, peak)
IOUT = 4.5 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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Selection of direct PWM and constant-current PWM
TB67H302HG
SELECT = L: operating direct PWM, SELECT = H: operating constant-current PWM
(1) In case of direct PWM:
・RSA should be connected to PGNDA.
・RSB should be connected to PGNDB.
・Vref A and Vref B should be connected to SGND.
(2) In case of constant-current PWM:
・RSA and RSB should be connected to current detection resistance (RNFA and RNFB) each.
・Configuration of output current is as follows;
Ach Io = (1/3 × VrefA) ÷ RNFA
Bch Io = (1/3 × VrefB) ÷ RNFB
This system adopts peak current detection. Average current is lower than setting current.
Set RNFA, RNFB, VrefA and VrefB as follows;
0.11Ω ≤ RNFA ≤ 0.5Ω, 0.11Ω ≤ RNFB ≤ 0.5Ω, 0.3V ≤ VrefA ≤ 1.95V and 0.3V ≤ VrefB ≤ 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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5 Page 
TB67H302HG
ALERT output
(1) ALERT 1 (Pin No. 1)
ALERT 1 terminal outputs in detecting either TSD or ISD.
ALERT 1 terminal is connected to power supply externally via pull-up resistance. Spec. is shown below.
VALERT1 = 0.5V (max) at 1mA
TSD
ISD ALERT 1 terminal
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.
VALERT2 = 0.5V (max) at 1mA
UVLO
ALERT 2 terminal
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 ALERT1 and ALERT2 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 2014-04-23
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| PDF Descargar | [ Datasheet TB67H302HG.PDF ] | |
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