TB67H451FNG
TOSHIBA BiCD Process Integrated Circuit Silicon Monolithic
TB67H451FNG
PWM Chopper Type DC Brushed Motor Driver
The TB67H451FNG is a PWM chopper type DC brushed motor driver.
One channel of motor output block is embedded.
Fabricated with the BiCD process, the TB67H451FNG is rated at output
voltage 50 V, maximum current 3.5A.
P-HSOP8-0405-1.27-002
Features
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Weight: 0.075g (typ.)
Monolithic IC using BiCD process
Capable of PWM constant current drive and direct PWM drive
Supporting 4 operation modes, Forward / Reverse / Brake / STOP (OFF)
Built-in output MOSFET with Low on-resistance (High side + low side=0.6Ω(typ.))
Realization of high voltage and large current drive (Refer to “Absolute maximum ratings” and “Operating range”.)
Built-in various error detection functions (Thermal shutdown (TSD), over current detection (ISD), and Under voltage
lockout(UVLO))
・
Built-in VCC regulator for the internal circuit operation.
Note: Please be careful about the thermal conditions during use.
Start of commercial production
2020-01
© 2019-2020
Toshiba Electronic Devices & Storage Corporation
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TB67H451FNG
Pin Assignment
GND
IN2
IN1
VREF
1
2
3
4
8
7
6
5
OUT2
RS
OUT1
VM
TB67H451FNG
(Top View)
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TB67H451FNG
Block Diagram
VM
VCC Regulator
Charge
Pump
OUT1
UVLO
IN1
IN2
Control
Logic
TSD
Up to 5V
Current
Comp
VREF
ISD
Pre-driver
H-Bridge
OUT2
GND
RS
Some of the functional blocks, circuits, or constants in the block diagram may be omitted or simplified for explanatory
purposes.
Note: All the grounding wires of the TB67H451FNG must run on the solder mask of the PCB. It must also be externally
terminated at a single point. Also, the grounding method should be considered for efficient heat dissipation.
Careful attention should be paid to the layout of the output, VM and GND traces, to avoid short circuits across output
pins or to the power supply or ground. If such a short circuit occurs, the device may be permanently damaged.
Also, the utmost care should be taken for pattern designing and implementation of the device since it has power
supply pins (VM, RS, OUT1, OUT2, and GND) through which a particularly large current may run. If these pins are
wired incorrectly, an operation error may occur or the device may be destroyed.
The logic input pins must also be wired correctly. Otherwise, the device may be damaged owing to a current running
through the IC that is larger than the specified current. Careful attention should be paid to design patterns and
mountings.
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TB67H451FNG
Pin Description
Pin description of pin No. 1 to 8.
Pin No.
1
2
3
4
5
6
7
8
Pin name
GND
IN2
IN1
VREF
VM
OUT1
RS
OUT2
Ground pin
Logic input pin 2
Logic input pin 1
Motor output current setting pin
Motor power supply
Motor output pin 1
Motor output current sense pin
Motor output pin 2
Description
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TB67H451FNG
Input and Output Equivalent Circuit
Pin name
Input / Output signal
Equivalent circuit
VIN(H): 2.0 V (min) to 5.5 V (max)
VIN(L): 0 V (min) to 0.8 V (max)
GND
Internal power supply
VREF
VREF applied voltage range
0 V to 4.0 V
VREF
OUT1
OUT2
RS
Operating range of VM power supply
voltage
4.5 V (min) to 44 V (max)
OUT pin voltage
4.5 V (min) to 50 V (max)
100kΩ
1 kΩ
VM
IN1
IN2
Logic input (VIN(H)/VIN(L))
Logic
input pin
1 kΩ
OUT1
OUT2
RS
The equivalent circuit may be omitted or simplified for explanatory purposes.
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ARM技术
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