TB6588FG Toshiba, TB6588FG Datasheet - Page 19

• Manufacturer Part Number: TB6588FG
• Description: IC PWM DRVR 3PH DC MOTOR 36HSOP
• Manufacturer: Toshiba
• Type: 3 Phase Full Wave PWM Driver for Sensorless DC Motorsr

Specifications of TB6588FG

• Applications: DC Motor Driver, Brushless (BLDC), 3 Phase
• Number Of Outputs: 1
• Current - Output: 1.5A
• Voltage - Load: 7 V ~ 42 V
• Voltage - Supply: 7 V ~ 42 V
• Operating Temperature: -30°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 36-HSOP
• Product: Fan / Motor Controllers / Drivers
• Operating Supply Voltage: 24 V
• Supply Current: 8 mA
• Mounting Style: SMD/SMT
• Function: Driver
• Vopmax (vm*): 24V (50V)
• Io (lpeak): 2.5A
• Sinusoidal Current Wave: no
• Sensor-less: yes
• Speed Feedback Loop: no
• Package: HSOP36
• Rohs Compatible†: yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Points to Remember on Handling of ICs
(1)
(2)
(3)
(4)
(5)
Over current protection circuit
Over current protection circuits (referred to as current limiter circuits) do not necessarily protect ICs
under all circumstances. If the Over current protection circuits operate against the over current, clear
the over current status immediately.
Depending on the method of use and usage conditions, such as exceeding absolute maximum ratings
can cause the over current protection circuit to not operate properly or IC breakdown before operation.
In addition, depending on the method of use and usage conditions, if over current continues to flow for
a long time after operation, the IC may generate heat resulting in breakdown.
Thermal shutdown circuit
Thermal shutdown circuits do not necessarily protect ICs under all circumstances. If the thermal
shutdown circuits operate against the over temperature, clear the heat generation status immediately.
Depending on the method of use and usage conditions, such as exceeding absolute maximum ratings
can cause the thermal shutdown circuit to not operate properly or IC breakdown before operation.
Heat radiation design
In using an IC with large current flow such as power amp, regulator or driver, please design the device
so that heat is appropriately radiated, not to exceed the specified junction temperature (TJ) at any
time and condition. These ICs generate heat even during normal use. An inadequate IC heat radiation
design can lead to decrease in IC life, deterioration of IC characteristics or IC breakdown. In addition,
please design the device taking into considerate the effect of IC heat radiation with peripheral
components.
Back-EMF
When a motor rotates in the reverse direction, stops or slows down abruptly, a current flow back to the
motor’s power supply due to the effect of back-EMF. If the current sink capability of the power supply
is small, the device’s motor power supply and output pins might be exposed to conditions beyond
maximum ratings. To avoid this problem, take the effect of back-EMF into consideration in system
design.
Damage due to Short-Circuits Between Neighboring Pin
Short-circuits between pins 1 and 2, pins 3 and 4 and pins 12 and 13 cause permanent damage to the
TB6588FG. As a result, a large current continuously flow into the device, leading to smoke and
possibly fire. To avoid this, the device application should be designed and adjusted properly, including
the external fail-safe mechanism, such as power supply fuses and overcurrent protection circuitry for
power supply. To minimize the effect of such a current flow in case of damage, ensure that the fuse
capacity, fusing time and overcurrent protection circuitry are properly adjusted.
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TB6588FG
2008-4-25