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參數(shù)資料
| 型號： | UC3572D |
| 英文描述： | Single-coil dual-output step-down DC/DC converter for digital base band and multimedia processor supply |
| 中文描述： | 電壓模式開關(guān)電源控制器 |
| 文件頁數(shù)： | 1/5頁 |
| 文件大?。?/td> | 87K |
| 代理商： | UC3572D |
UC1572
UC2572
UC3572
DESCRIPTION
The UC3572 is a negative output flyback pulse width modulator which con-
verts a positive input voltage to a regulated negative output voltage. The
chip is optimized for use in a single inductor negative flyback switching con-
verter employing an external PMOS switch. The block diagram consists of
a precision reference, an error amplifier configured for voltage mode opera-
tion, an oscillator, a PWM comparator with latching logic, and a 0.5A peak
gate driver. The UC3572 includes an undervoltage lockout circuit to insure
sufficient input supply voltage is present before any switching activity can
occur, and a pulse-by-pulse current limit. Output current can be sensed and
limited to a user determined maximum value. The UVLO circuit turns the
chip off when the input voltage is below the UVLO threshold. In addition, a
sleep comparator interfaces to the UVLO circuit to turn the chip off. This re-
duces the supply current to only 50
μ
A, making the UC3572 ideal for battery
powered applications.
Negative Output Flyback Pulse Width Modulator
FEATURES
Simple Single Inductor Flyback PWM
for Negative Voltage Generation
Drives External PMOS Switch
Contains UVLO Circuit
Includes Pulse-by-Pulse Current Limit
Low 50
μ
A Sleep Mode Current
SLUS275A - MARCH 1999 - REVISED AUGUST 2001
BLOCK DIAGRAM
UDG-94094-2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UC1572D | 8-bit MCU with Flash or ROM, 10-bit ADC, 5 timers, SPI, 2x LINSCI" |
| UC1572DTR | 8-bit MCU with Flash or ROM, 10-bit ADC, 5 timers, SPI, 2x LINSCI" |
| UC1572N | 8-bit MCU with Flash or ROM, 10-bit ADC, 5 timers, SPI, 2x LINSCI" |
| UC2572D | HIGH SIDE SMART POWER SOLID STATE RELAY |
| UC2572DTR | HIGH SIDE SMART POWER SOLID STATE RELAY |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UC3572DG4 | 功能描述:DC/DC 開關(guān)控制器 Neg Output Flyback PWM RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| UC3572DTR | 功能描述:DC/DC 開關(guān)控制器 Neg Output Flyback PWM RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| UC3572DTRG4 | 功能描述:DC/DC 開關(guān)控制器 Neg Output Flyback PWM RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| UC3572J | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| UC3572N | 功能描述:DC/DC 開關(guān)控制器 Neg Output Flyback Pulse Width Mod RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
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