參數(shù)資料
型號(hào)： TAS5100ADAP
廠(chǎng)商： Texas Instruments, Inc.
元件分類(lèi)： 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(yè)數(shù)： 6/16頁(yè)
文件大?。?/td> 214K
代理商： TAS5100ADAP
TAS5100A
SLES030
–
FEBRUARY 2002
6
www.ti.com
functional description
PWM H-bridge state control
The digital interface control signals consists of PWM_AP, PWM_AM, PWM_BP, and PWM_BM. These signals
are a complementary differential signal format for the A-side H-bridge and the B-side H-bridge.
bootstrapped gate drive
The TAS5100A includes two dedicated bootstrapped power supplies. A bootstrap capacitor is connected
between the individual bootstrap pin and the associated output as described in the application note SLAA117.
For example, a capacitor is connected between the BOOTSTRAPA pin and OUTPUTA pin, and another
capacitor is connected between the BOOTSTRAPB pin and the OUTPUTB pin. The bootstrap power supply
minimizes the number of high voltage power supply levels externally supplied to the system while providing a
low noise supply level for driving the high-side N-channel DMOS transistors. See application note SLAA117 for
details.
low-dropout voltage regulator
Two on-chip low-dropout voltage regulators (LDO) are provided to minimize the number of external power
supplies needed for the system. These voltage regulators are for internal circuits only and cannot be used for
external circuitry. Each LDO is dedicated to an H-bridge and its gate driver. An LDO output capacitor is
connected between the individual LDO output pin and the associated output return as described in the
application note SLAA117. For example, a capacitor is connected between the LDROUTA pin and PVSS pin,
and another capacitor is connected between the LDROUTB pin and PVSS pin.
high-current H-bridge output stage
The positive outputs of the H-bridge are the two OUTPUTA pins. The negative outputs of the H-bridge are the
two OUTPUTB pins. The logic for the input command to H-bridge outputs is described in the H-bridge output
mapping section below. When the TAS5100A is in the normal mode, as seen in the H-bridge output mapping
tables, the outputs are decoded from the inputs. However, the TAS5100A is immediately shut down if any of
the following error conditions occur: over-current, over-temperature, low regulator output voltage, or an illegal
PWM input state is applied. For these conditions, the outputs are set to the appropriate disabled state as
specified in the H-bridge output mapping section, and the SHUTDOWN pin is set low.
H-bridge output mapping
The A-side H-bridge output is designed to the following truth table:
INPUTS
OUTPUTS
DESCRIPTION
RESET
X
X
0
1
1
1
1
PWDN
X
0
1
1
1
1
1
PWM_AP
X
X
X
0
0
1
1
PWM_AM
X
X
X
0
1
0
1
SHUTDOWN
0
1
1
0
1
1
0
OUTPUTA
0 or Hi-Z
Hi-Z
0
0
0
1
0
Shutdown
Powerdown
Reset
Shutdown
Normal
Normal
Shutdown
Output is 0 for low voltage, over temperature, and illegal input. Hi-Z is for over current.
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TAS5100ADAPR 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:TRUE DIGITAL AUDIO AMPLIFIER TAS5100A PWM POWER OUTPUT STAGE
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TAS5100AIDAPR 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:TRUE DIGITAL AUDIO AMPLIFIER TAS5100A PWM POWER OUTPUT STAGE
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