參數(shù)資料
型號: TAS5100ADAPR
廠商: Texas Instruments, Inc.
元件分類: 運(yùn)動(dòng)控制電子
英文描述: Single Audio Amplifier
中文描述: 單音頻放大器
文件頁數(shù): 7/16頁
文件大?。?/td> 214K
代理商: TAS5100ADAPR
TAS5100A
SLES030
FEBRUARY 2002
7
www.ti.com
H-bridge output mapping (continued)
The B-side H-bridge output is designed to the following truth table:
INPUTS
PWDN
X
OUTPUTS
DESCRIPTION
RESET
X
PWM_BP
X
PWM_BM
X
SHUTDOWN
0
OUTPUTB
0 or Hi-Z
Shutdown
X
0
X
X
1
Hi-Z
Powerdown
0
1
X
X
1
0
Reset
1
1
0
0
0
0
Shutdown
1
1
0
1
1
0
Normal
1
1
1
0
1
1
Normal
1
1
1
1
0
0
Shutdown
Output is 0 for low voltage, over temperature, or illegal input. Hi-Z is for over current.
control/sense circuitry
The control/sense circuitry consists of the following 3.3-V logic level pins: PWDN, RESET, ERR0, ERR1, and
SHUTDOWN. The active-low PWDN input pin powers down all internal circuitry and forces the H-bridge outputs
to the Hi-Z state. When the PWDN pin is low, the open drain ERR0, ERR1, and SHUTDOWN pins are also
disabled so that their outputs can be pulled high. The active-low RESET input pin forces the H-bridge outputs
to the low-low state and resets the over-current shutdown latch. The PWDN pin overrides the RESET pin. The
ERR0, ERR1, and SHUTDOWN outputs indicate the following conditions in the TAS5100A as shown in the table
below. These three outputs are open-drain connections with internal pullup resistors so that wire-ORed
connections can be made by the user with other external control devices. The short circuit protect error condition
latches the TAS5100A in this shutdown state and force the H-bridge outputs to the Hi-Z state until the device
is reset by means of the RESET pin. The illegal PWM input state, over-temperature, and low regulator voltage
error conditions do not latch the device in the shutdown condition. Instead the H-bridge outputs are forced to
the low-low state and the TAS5100A returns to normal operation as soon as the error condition ends. Loss of
clocking PWM signal is also considered an illegal PWM input state.
SHUTDOWN
ERR1
ERR0
FUNCTION
OUTPUTA
OUTPUTB
0
0
0
Illegal PWM input state
Low
Low
0
0
1
Short circuit protect (latch)
Hi-Z
Hi-Z
0
1
0
Over temperature protect
Low
Low
0
1
1
Low regulator voltage protect
Low
Low
1
0
0
Reserved
1
0
1
Reserved
1
1
0
High temperature
warning
Normal
Normal
1
1
1
Normal operation
Normal
Normal
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