TA8493AFG TOSHIBA Semiconductor CORPORATION, TA8493AFG Datasheet - Page 14

• Manufacturer Part Number: TA8493AFG
• Description: 3-phase Full Wave Brushless Dc Motor Driver Ic For Cd-rom Drives
• Manufacturer: TOSHIBA Semiconductor CORPORATION

•
•
Current limiter circuit
(0.3 V)
Note5: Keep “H” level in this term
Thermal shut down circuit
The current limit value is determined by the equation below.
This circuit cut off lower power transistors compulsorily when filtered V
PWM signal cut off compulsorily is released from OFF state by next ON signal.
Consider inside resistance (5 kΩ) when setting the capacitance value (C
The circuit turns off output when T
I
LIM
∼ −
R
F
0.3
+ 0.1
Limiter Amp. Output
PWM Signal
Lower Pw T
[A] (typ.)
Limiter amp circuit
r
.
j
ON OFF
= 175°C (typ.) (according to design specification)
ON OFF
14
C
RF
5 kΩ
ON
Over current detection term
OFF
(Note5)
R
I
F
M
ON
RF
RF
).
is more than reference voltage.
2006-3-6