TB6561FG Toshiba, TB6561FG Datasheet - Page 7

• Manufacturer Part Number: TB6561FG
• Manufacturer: Toshiba

Specifications of TB6561FG

• Functions: Driver
• Vopmax (vm*): 36V (40V)
• Io (lpeak): (1.5A)
• Channel: 2-ch
• Pwm Drive: direct PWM
• Package: SSOP30
• Rohs Compatible†: yes

• These protection features are provided to temporarily avoid abnormal conditions such as output short circuits
• These features do not operate outside the guaranteed operating ranges and the IC may be permanently
• The overcurrent protection is only provided to protect the IC from temporary short circuits. If a short-circuit
Overcurrent Protection Circuit (ISD)
and are not guaranteed to prevent the IC from being damaged.
damaged in case of output short circuits.
condition persists for a long time, it may cause excessive stress and damage to the IC. The protection system
should be configured so that any overcurrent condition will be eliminated as soon as possible.
OUTPUT UPPER SIDE Iout – VCE(sat) <Reference data>
2.0
1.5
1.0
0.5
The IC incorporates an overcurrent protection circuit to detect voltage that flows through the output
transistors. The overcurrent threshold is 2.5 A (typ.).
Currents that flow through the output transistors are monitored individually. If overcurrent is detected in
at least one of the transistors, all transistors are turned off.
The IC incorporates a timer to count 50 μs (typ.) for which the transistors are off. After 50 μs, they are
turned on automatically. If an overcurrent occurs again, the same operation is repeated. To prevent false
detection due to glitch, the circuit turns off the transistors only when current that exceeds the overcurrent
threshold flows for 10 μs or longer.
The over-current threshold is a target spec. It varies in a range from approximately 1.5 A to 3.5 A.
0
0
0.25
Output current
OUTPUT CURRENT Iout (A)
0.50
I
LIM
0
0.75
Not detected
1.00
10 μs
(typ.)
1.25
50 μs
(typ.)
1.50
10 μs
(typ.)
7
50 μs
(typ.)
OUTPUT LOWER SIDE Iout – VCE(sat) <Reference data>
2.0
1.5
1.0
0.5
0
0
0.25
OUTPUT CURRENT Iout (A)
0.50
0.75
1.00
TB6561FG
2010-08-17
1.25
1.50