FAN8035 Fairchild Semiconductor, FAN8035 Datasheet - Page 12

• Manufacturer Part Number: FAN8035
• Description: 5 Channel BTL Driver + 1CH DC Motor Driver With 2 Op-amp
• Manufacturer: Fairchild Semiconductor

FAN8035
Application Information
1. Thermal Shutdown
• The TSD circuit is activated at the junction temperature of 160°C and
2. CH Mute Function
• When the mute pin is high, the TR Q1 is on and Q2 is off, so the bias
• During the mute on state, all the circuit blocks except for the variable
• Truth table is as follows;
3. Power Save Function
• When the pin39 is high, the TR Q3 becomes on and Q4 off, so the bias
• During the power save on state, this function keeps all the circuit
• Truth table is as follows;
4. TDS Monitor Function
• Pin22 is TSD monitor pin, which detects the state of the TSD block
• In the normal state Q5 is on, and Q6 is off. When the TSD block is
• Truth table is as follows;
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deactivated at 135°C with the hysteresis of 25°C. During the thermal
shutdown, the TSD circuit keeps all the output driver off.
circuit is enabled. When the mute pin is low (GND), the TR Q1 is off
and Q2 is on, so the bias circuit is disabled.
regulator remain off, and the low power quiescent state is established.
circuit is enabled. When the pin39 is low (GND) , the TR Q3 becomes
off and Q4 is on, so the bias circuit is disabled.
blocks off, and the low power quiescent state is established.
and generates the TSD-monitor signal.
activated Q5 becomes off, and thus the voltage of pin22 keeps low.
Pin 19, 20, 21
TSD On
TSD Off
Pin39
High
High
TSD
Low
Low
Power Save Off
Power Save On
Power Save
Mute-Off
Mute-On
Pin22
Mute
High
Low
Hysteresis
19
20
21
39
VCC
Ihys
R(external)
22
R1
R2
R3
SVCC
SVCC
Q6
IREF
SVCC
Q3
Q1
Q0
Q5
SVCC
Q4
Q2
20K
Output driver
Bias Blocks
(5-CH BTL)
Main Bias
Bias