SA1469TN Datasheet, PDF (4/11 Pages) Silan Microelectronics Joint-stock – 4-CH BTL DRIVER FOR CD PLAYER WITH 3.3V OUTPUT VOLTAGE

SA1469TN
Pin No.
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Symbol
OUT2A
GND
OPOUT
OPIN (-)
OPIN (+)
OUT3A
OUT3B
IN3A
IN3B
VCC
VCC
VREF
IN4B
IN4A
OUT4B
OUT4A
GND
I/O
O
Drive output
--
Ground
O
Opamp output
I
Opamp input (-)
I
Opamp input (+)
O
Drive output
O
Drive output
I
Drive input
I
Drive input
--
Supply voltage
--
Supply voltage
I
2.5V bias voltage
I
Drive input
I
Drive input
O
Drive output
O
Drive output
--
Ground
Description
FUNCTIONAL DESCRIPTION
1. MUTE
Function
Thermal shutdown
Mute
○
External muting
○
VREF muting
○
T≥175°C
V(mute)≤ 1.4V
Or open
PIN23 < 0.7V
Operation conditions
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..
4) When the voltage of the mute pin is above 2V, the mute circuit is stopped and the output circuit is operated
normally.
5) If the chip temperature rises above 175°C, then the TSD (Thermal Shutdown) circuit is activated and the
output circuit is muted.
6) When the voltage of PIN23<0.7V ,the output circuit will be muted.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV:1.2 2008.07.23
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