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參數(shù)資料
| 型號(hào)： | UC3572N |
| 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： | 集成電路負(fù)輸出脈寬調(diào)制 |
| 文件頁數(shù)： | 1/5頁 |
| 文件大小： | 87K |
| 代理商： | UC3572N |
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 |
|---|---|
| UC3573N | Power management for multimedia processors |
| UC3635J | Phase-Locked Loop |
| UC2635DW | Iso high side smart power solid state relay |
| UC2635DWTR | High side smart power solid state relay |
| UC2635J | Phase-Locked Loop |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UC3572NG4 | 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(fēng)格: 封裝 / 箱體:CPAK |
| UC3573 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Buck Pulse Width Modulator Stepdown Voltage Regulator |
| UC3573D | 功能描述:DC/DC 開關(guān)控制器 Buck Pulse Width Mod StepDwn Vltg Reg 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(fēng)格: 封裝 / 箱體:CPAK |
| UC3573DG4 | 功能描述:DC/DC 開關(guān)控制器 Buck PWM Stepdown Vltg Reg 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(fēng)格: 封裝 / 箱體:CPAK |
| UC3573DTR | 功能描述:DC/DC 開關(guān)控制器 Buck PWM Stepdown Vltg Reg 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(fēng)格: 封裝 / 箱體:CPAK |
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