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參數(shù)資料
| 型號： | MAX9738EWP+TG45 |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 14/14頁 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO PWR MONO G 20WLP |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 類型： | G 類 |
| 輸出類型： | 1-通道（單聲道） |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 特點： | 消除爆音，差分輸入，關(guān)閉 |
| 安裝類型： | 表面貼裝 |
| 供應(yīng)商設(shè)備封裝： | 20-WLP |
| 封裝/外殼： | 20-WFBGA，WLBGA |
| 包裝： | 帶卷 (TR) |
| 配用： | MAX9738EVKIT+-ND - KIT EVALUATION FOR MAX9738 |
MAX9738
Inverting Boost Converter
The MAX9738 features an integrated inverting boost
converter with an on-chip n-channel MOSFET to pro-
vide an inverted supply rail that can supply up to
400mA over the +2.7V to +5.5V positive supply range.
The boost converter generates the negative supply rail
(VSS) needed to create the higher supply range that
allows the output of the device to operate over a
greater dynamic range as the battery supply collapses
over time. The converter uses a constant on-time,
pulse-frequency modulation (PFM) architecture. The
integrated MOSFET and the built-in soft-start function
reduce the number of external components required
while controlling inrush currents. The inverting boost
regulator achieves soft-start by decreasing both peak
inductor current limit and the constant on-time until VSS
voltage reaches 90% of its regulation level.
PFM Controller Block
An error amplifier compares the output voltage to an
internal target voltage. Once the output voltage is
smaller than the regulation level, the controller sets a
flip-flop, turning on the n-channel MOSFET and apply-
ing the battery voltage across the inductor. The current
through the inductor ramps up linearly, storing energy
in its magnetic field. Once the on-time timer expires, or
the inductor current reaches the current limit, the con-
troller resets the flip-flop and turns off the MOSFET.
Since the inductor current is continuous, a transverse
potential develops across the inductor that turns on the
diode (D1). This discharge condition forces the current
through the inductor to ramp back down, transferring
the energy stored in the magnetic field to the output
capacitor and the load. The MOSFET remains off until
the minimum off-time is expired or the output voltage is
above the regulation level.
16VP-P Class G Amplifier with
Inverting Boost Converter
_______________________________________________________________________________________
9
ON
IN1
P
N1
N2
IP
ON
OFF
ZL
VDD
VSS
LOW SUPPLY RANGE OPERATION
IP = IN1
ON
IN2
P
N1
N2
IP
ON
ZL
VDD
BTL CLASS G SUPPLY TRANSITION
VSS
SUPPLY TRANSITION
IP = IN1 + IN2
ON
P
N1
N2
IP
OFF
ON
ZL
VDD
VSS
HIGH SUPPLY RANGE OPERATION
IP = IN2
Figure 1. Class G Supply Transition
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| MAX973C/D | 功能描述:校驗器 IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| MAX973CPA | 功能描述:校驗器 IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| MAX973CPA+ | 功能描述:校驗器 IC Dual Comparator / Reference RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| MAX973CSA | 功能描述:校驗器 IC Dual Comparator / Reference RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| MAX973CSA+ | 功能描述:校驗器 IC Dual Comparator / Reference RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
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