TB6588FG Toshiba, TB6588FG Datasheet - Page 7

• 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

VSP
Output pin
START
IP
SC
6. Motor Speed Control Pin
7. Fault Protection Operation
An analog voltage applied to the VSP pin is converted by a 7-bit AD converter and used to control the duty
cycle of the PWM.
The logic level of the EN pin determines whether to enable the protection functionality.
(The EN pin has a pull-up resistor.)
When a behavior as shown below is detected via the WAVEP and WAVEM pins, as the motor is deemed to be
in an abnormal state and the output transistors are turned off. About one second later, the motor is
restarted. The device begins cycling into and out of the protection mode if the abnormality persists.
•
•
0 ≤ V
V
V
H or Open : Protection functionality enabled
L
The maximum commutation frequency is exceeded.
The rotation speed falls below the forced commutation frequency.
AD
AD
SP
(L) ≤ V
(H) < V
< V
: Protection functionality disabled
ON
AD
SP
SP
≤ V
(L) → Duty cycle = 0%
Fault detected
≤ V
AD
REF
(H) → Figure on the right (1/128 to 127/128)
→ Duty cycle ≈ 100% (127/128)
Duty Cycle
100%
0%
OFF
(VSP)
(a)
V AD (L)
7
ON
1 V
V
V AD (H)
V
SP
SP
= 1 V or higher
When the SC pin capacitor = 0.47 µF and
V
(a): T
SP
= 4 V
V SP
OFF
=
=
= 880 ms (typ.)
. 0
47
C
SC
μ
1
6 .
×
F
μ
(
VSP
×
i
A
4 (
−
−
TB6588FG
) 1
) 1
2008-4-25