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PDF SA1469PH Data sheet ( Hoja de datos )
| Número de pieza | SA1469PH | |
| Descripción | 4-Ch BTL Driver | |
| Fabricantes | SL | |
| Logotipo |  |
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SA1469PH
4-CH BTL DRIVER FOR CD PLAYER WITH 3.3V OUTPUT VOLTAGE
DESCRIPTION
The SA1469PH, an IC for CD players, has a 4-channel BTL driver,
3.3V regulator (attached PNP transistor required), standard operational
amplifier, and internal reset output linked to an internal thermal shutdown
circuit. The driver has gain adjustment input pins for each channel,
allowing gain to be set to the desired value. Also, the internal level shift
www.DataSheet4U.ccoirmcuit helps reduce the number of attached components.
FEATURES
* 1-phase, full-wave, linear DC motor driver
* Gain is adjustable with an attached resistor.
* Internal standard operational amplifier.
* Internal 3.3V regulator. (required attached PNP transistor)
* Internal thermal shutdown circuit with hysteresis capabilities.
ORDERING INFORMATION
Device
SA1469PH
Package
HSOP-28-375-0.8
BLOCK DIAGRAM
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV:1.4 2008.07.23
Page 1 of 11
1 page  
SA1469PH
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.
2. TSD (THERMAL SHUTDOWN)
www.DataSheet4U.com
VREF
R1
R2
Output Driver
Bias
Qn
1) The VREF is the output voltage of the band-gap-referenced biasing circuit and acts as the input voltage of
the TSD circuit.
2) The base-emitter voltage of the TR, Qn is designed to turn-on at below voltage.
VBE=VREF * R2/(R1+R2)=460mV
3) When the chip temperature rises up to 175°C, then the turn-on voltage of the Qn would drop down to 460mV.
(Hysteresis: 25°) and, the Qn would turn on so the output circuit will be muted.
3. OP-AMP
OP-Amp is integrated in the IC for user convenuence.
OPIN(+)
OPIN(-)
OPOUT
Pins 14, 15 and 16 may be left open when the operational amplifier is not used.
4. DRIVER
1) The voltage, VREF, is the reference voltage given by the BIAS voltage of the pin # 23.
2) The input signal through the pin # 3 is amplified by 13K/10K times and then fed to the level shift.
3) The level shift produces the current due to the difference between the input signal and the arbitrary reference
signal. The current produced as +ΔV and -ΔV is fed into the driver buffer.
4) Driver buffer operates the power TR of the output stage according to the state of the input signal.
5) The output stage is the BTL driver and the motor is rotating in forward direction by operating TR Q1 and TR
Q4. on the other hand, if TR Q2 and TR Q3 is operating, the motor is rotating in reverse direction.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV:1.4 2008.07.23
Page 5 of 11
5 Page 
SA1469PH
ATTACH
Revision History
Data
2003.05.26
2007.03.12
REV
1.0
1.1
2007.08.13
www.DataSheet4U.com
2007.10.25
2008.07.23
1.2
1.3
1.4
Description
Original
Modify the “Operating Temperature”
Modify the “Block Diagram”, “Supply Voltage”, “Functional
Description” and “Typical Application Circuit”
Add the “Power dissipation curve”
Modify the “Power dissipation curve”
Page
1
1,4,7
2
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV:1.4 2008.07.23
Page 11 of 11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet SA1469PH.PDF ] | |
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