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參數資料
| 型號： | TPS56100PWPRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 1.4 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封裝： | GREEN, PLASTIC, HTSSOP-28 |
| 文件頁數： | 11/30頁 |
| 文件大小： | 595K |
| 代理商： | TPS56100PWPRG4 |
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TPS56100
HIGHEFFICIENCY DSP POWER SUPPLY CONTROLLER
FOR 5V INPUT SYSTEMS
SLVS201A JUNE 1999 REVISED JULY 1999
19
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
The hysteretic-type controller method used in the TPS56100 controller gives very fast transient response for
today’s high-speed DSP applications. Traditional PWM-type controllers use an oscillator to control the timing
of the control signals used to adjust the output voltage. During a transient load event, the PWM-type controller
must wait until the next oscillator cycle to begin the output voltage adjustment process. This delay causes output
droop (or overshoot) and longer recovery times. Hysteretic-type controllers, such as the TPS56100, are
self-oscillating and require no cycle-time to begin the recovery process. Hysteretic controllers have extremely
high gain and are sensitive to noise. The TPS56100 has internal low-pass noise filters to eliminate much of this
problem, however an external RC low-pass filter between the output and VSENSE input is recommended.
The TPS56100 controller includes all of the functions necessary for a dependable high-efficiency power
converter. High-current synchronous MOSFET drivers are used for fast, low-loss switching allowing for
efficiencies greater than 90%. An internal bootstrap circuit provides the high-side drive voltage necessary for
the upper n-channel MOSFET. Overcurrent protection protects the power supply in case of load faults.
Overvoltage protection protects the load in case of high-side switch failure. Programmable hysteresis allows
users to tailor the output ripple and operating frequency to suit their needs. Slowstart provides a controlled
rampup time for the output voltage eliminating output overshoot. Inhibit is provided for sequencing of the
converter in multiple-voltage circuits. Power good provides an indication that the output voltage is within
operating limits. The design of each of these functions is discussed in detail in the following. Refer to Figure 19
for location of components discussed in the following.
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| TPS561208DDCT | 功能描述:4.5V TO 17V INPUT, 2A OUTPUT, SY 制造商:texas instruments 系列:SWIFT?? 包裝:剪切帶（CT） 零件狀態:在售 功能:降壓 輸出配置:正 拓撲:降壓 輸出類型:可調式 輸出數:1 電壓 - 輸入（最小值）:4.5V 電壓 - 輸入（最大值）:17V 電壓 - 輸出（最小值/固定）:0.76V 電壓 - 輸出（最大值）:7V 電流 - 輸出:1A 頻率 - 開關:580kHz 同步整流器:是 工作溫度:-40°C ~ 85°C（TA） 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 細型，TSOT-23-6 供應商器件封裝:SOT-23-6 標準包裝:1 |
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