FAN8026G3 Fairchild Semiconductor, FAN8026G3 Datasheet - Page 10

• Manufacturer Part Number: FAN8026G3
• Description: 5-CH Motor Driver
• Manufacturer: Fairchild Semiconductor

FAN8026G3
Application information
1. MUTE Function
When the mute pin is low(GND), the TR Q1 is turned on and the bias
circuit is enabled. On the other hand, when the mute pin is high , the TR
Q1 is turned off and the bias circuit is disabled.
It will make all the circuit blocks except CH1 off, so low power quies-
cent state can be established.
• Truth table is as follows
2. TSD Function
• When the chip temperature reaches to 175°C by abnormal condition,
• This makes the bias current of the output drivers shut down, and all
• When the chip temperature falls to 155°C, the TSD circuit is
3. Notice
• If REF(pin23) is lower than 0.7V, BTL output is off.
• Under voltage protecton function. ( If SVcc is lower than 3.8V, Chip is disable. Hysterisis is 0.2V)
• Mute on BTL output voltage is as followed:
• Each output to output and output to GND short should be kept away.
10
the TSD circuit is activated
the output drivers are on cut-off state. Therefore the chip temperature
begins to decrease.
deactivated and the output drivers start to operate normally.
- Mute on BTL output(CH2,3,4,5) = VM / 2
- Mute on BTL output CH1 = ((PVcc2-0.6) / 2
Pin 23
High
Low
FAN8026
Mute-On
Mute-Off
Hysteresis
23
Ihys
R1
R2
R3
SVCC
IREF
Q1
Bias Current
Q0
CH2,3,4,5
Output driver
Bias