SA1469XH
(Continued)
Pin No.
Symbol
IN2B
I/O
I
Description
9
Drive input
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
IN2A
I
Drive input
OUT2B
OUT2A
GND
O
O
--
O
I
Drive output
Drive output
Ground
OPOUT
OPIN (-)
OPIN (+)
OUT3A
OUT3B
IN3A
Opamp output
Opamp input (-)
Opamp input (+)
Drive output
Drive output
Drive input
I
O
O
I
IN3B
I
Drive input
V
V
--
--
I
Supply voltage
Supply voltage
2.5V bias voltage
Drive input
CC
CC
VREF
IN4B
I
IN4A
I
Drive input
OUT4B
OUT4A
GND
O
O
--
Drive output
Drive output
Ground
FUNCTIONAL DESCRIPTION
1. MUTE
Function
Thermal shutdown
External muting
Mute
Operation conditions
○
○
T≥175°C
V(mute)≤1.4V or open
1) The circuit is muted during thermal shutdown and during the mute-on state.In each case, only the drivers are
muted.
2) During mute ,the output pins remain at the internal bias voltage, roughly (Vcc-Vf)/2.
3) When the mute pin # 7 is open or the voltage of the mute pin # 7 is below 0.5V, the mute circuit is activated
so that the output circuit will be muted.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
REV:1.4
2008.07.23
Http://www.silan.com.cn
Page 4 of 11
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