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參數(shù)資料
| 型號： | TPS5430DDARG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 6 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | GREEN, PLASTIC, SOP-8 |
| 文件頁數(shù)： | 26/28頁 |
| 文件大?。?/td> | 810K |
| 代理商： | TPS5430DDARG4 |
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APPLICATION INFORMATION
FUNCTIONAL BLOCK DIAGRAM
VIN
UVLO
ENABLE
Thermal
Protection
Reference
Overcurrent
GateDrive
Oscillator
Ramp
Generator
VREF
PH
ENA
GND
BOOT
Z1
Z2
SHDN
VIN
112.5%VREF
VSENSE
OVP
HICCUP
SHDN
NC
FeedForward
BOOT
NC
POWERPAD
VIN
VOUT
5 A
1.221VBandgap
SlowStart
Boot
Regulator
Error
Amplifier
Gain=25
PWM
Comparator
Protection
Gate
Driver
Control
VSENSE
DETAILED DESCRIPTION
Oscillator Frequency
Voltage Reference
Enable (ENA) and Internal Slow Start
SLVS632C – JANUARY 2006 – REVISED NOVEMBER 2006
The internal free running oscillator sets the PWM switching frequency at 500 kHz. The 500 kHz switching
frequency allows less output inductance for the same output ripple requirement resulting in a smaller output
inductor.
The voltage reference system produces a precision reference signal by scaling the output of a temperature
stable bandgap circuit. The bandgap and scaling circuits are trimmed during production testing to an output of
1.221 V at room temperature.
The ENA pin provides electrical on/off control of the regulator. Once the ENA pin voltage exceeds the threshold
voltage, the regulator starts operation and the internal slow start begins to ramp. If the ENA pin voltage is pulled
below the threshold voltage, the regulator stops switching and the internal slow start resets. Connecting the pin
to ground or to any voltage less than 0.5 V will disable the regulator and activate the shutdown mode. The
quiescent current of the TPS5430/TPS5431 in shutdown mode is typically 18
A.
The ENA pin has an internal pullup current source, allowing the user to float the ENA pin. If an application
requires controlling the ENA pin, use open drain or open collector output logic to interface with the pin. To limit
the start-up inrush current, an internal slow-start circuit is used to ramp up the reference voltage from 0 V to its
final value, linearly. The internal slow start time is 8 ms typically.
7
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS5430DDARG4 | 制造商:Texas Instruments 功能描述:DC/DC Converter IC |
| TPS5430-EP | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3-A WIDE-INPUT-RANGE STEP-DOWN SWIFTa?￠ CONVERTER |
| TPS5430EVM-136 | 功能描述:電源管理IC開發(fā)工具 TPS5430EVM-136 RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS5430EVM-173 | 功能描述:電源管理IC開發(fā)工具 Step Down Conv Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS5430EVM-173 | 制造商:Texas Instruments 功能描述:EVALUATION MODULE KIT |
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