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TB67H450FNG
TOSHIBA BiCD Process Integrated Circuit Silicon Monolithic
TB67H450FNG
PWM Chopper Type DC Brushed Motor Driver
The TB67H450FNG is a PWM chopper type DC brushed motor driver. One channel of motor output block is embedded. Fabricated with the BiCD process, the TB67H450FNG is rated at output voltage 50 V, maximum current 3.5A.
Features
・ Monolithic IC using BiCD process ・ Capable of PWM constant current drive and direct PWM drive
HSOP8 Weight: 0.075g (typ.)
・ 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.
Part Number TB67H450FNG(O,N,EL TB67H450FNG(O,EL)
Parts Marking TB67H450FNG(O,N,EL
Package name (Note) P-HSOP8-0405-1.27-002 P-HSOP8-0405-1.27-001
TB67H450FNG(O,EL)
H450
..
H450
Lot code
Pin No.1
© 2019 Toshiba Electronic Devices & Storage Corporation
1
Start of commercial production
2019-05
2019-12-02
Pin Assignment
TB67H450FNG
GND 1 IN2 2 IN1 3
VREF 4
8 OUT2
TB67H450FNG (Top View)
7 RS 6 OUT1
5 VM
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Block Diagram
TB67H450FNG
VM
IN1 IN2
Up to 5V VREF
VCC Regulator
Control Logic
UVLO ISD
Charge Pump
Pre-driver
TSD
Current Comp
H-Bridge
GND
RS
OUT1 OUT2
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 TB67H450FNG 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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Pin Description
Pin description of pin No. 1 to 8.
Pin No.
Pin name
1
GND
Ground pin
2 IN2 Logic input pin 2
3 IN1 Logic input pin 1
4
VREF
Motor output current setting pin
5 VM Motor power supply
6
OUT1
Motor output pin 1
7 RS Motor output current sense pin
8
OUT2
Motor output pin 2
Description
TB67H450FNG
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Input and Output Equivalent Circuit
Pin name
Input / Output signal
Logic input (VIN(H)/VIN(L)) IN1 IN2 VIN(H): 2.0 V (min) to 5.5 V (max)
VIN(L): 0 V (min) to 0.8 V (max)
VREF
VREF applied voltage range 0 V to 4.0 V
TB67H450FNG
Equivalent circuit
Logic input pin
1 kΩ
100kΩ
GND Internal power supply
VREF
1 kΩ
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)
VM OUT1
RS
The equivalent circuit may omitted or simplified for explanatory purposes.
OUT2
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TB67H450FNG
Functional Description
Input and output function IN1 IN2
OUT1
L L OFF (Hi-Z)
OUT2 OFF (Hi-Z)
HLH L
Mode Stop Standby mode after 1 ms
Forward
LHL
H
Reverse
HH L
L
Brake
Current path: Forward rotation (OUT1 to OUT2), Reverse rotation (OUT2 to OUT1)
Standby mode When both IN1 and IN2 pins are set to L for 1 ms (typ.) or more, the operation mode enters into the standby mode. When IN1 or IN2 is set to H, the mode returns from the standby mode, and enters to the operation mode.
Maximum 30 μs are required for the return time from the standby release. The OUT1 and OUT2 outputs operate after 30 μs (max) from standby release.
1 ms (typ.)
30 μs (max)
IN1 IN2
OUT1 OUT2
OUT1: Hi-Z OUT2: Hi-Z
OUT1: H OUT2: L
OUT1: Hi-Z OUT2: Hi-Z
OUT1: H OUT1: Hi-Z OUT1: H OUT2: L OUT2: Hi-Z OUT2: L
Standby Return
mode
time
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TB67H450FNG
Constant current PWM blanking time
In TB67H450FNG, the following blanking time is set to prevent a spike current and external noise which are generated during driving a motor.
(1) tBLK
(2)
NFth
Charge
Fast
Slow
The timing charts or constants may be omitted or simplified for explanatory.
tBLK (For preventing incorrect detection of a spike current at changing from Decay to Charge): 3.6 μs (typ.): (1)
The blanking time, 400 ns (typ.).