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參數(shù)資料
| 型號： | SP7650 |
| 英文描述： | Wallmount ULTRX Series Fiberglass Enclosure; NEMA Type:1, 2, 4, 4X, 12, 13; Enclosure Material:Fiberglass; External Height:24.61"; External Width:24.11"; External Depth:12.64"; Enclosure Color:Light Gray |
| 中文描述： | 寬輸入電壓范圍第3A，300kHz的降壓穩(wěn)壓器 |
| 文件頁數(shù)： | 4/12頁 |
| 文件大小： | 121K |
| 代理商： | SP7650 |
4
Date: 08/24/04
SP7650 Wide Input Voltage Range 3A, 300kHz, Buck Regulator Copyright 2004 Sipex Corporation
General Overview
The SP7650 is a fixed frequency, voltage mode,
synchronous PWM regulator optimized for high
efficiency. The part has been designed to be
especially attractive for high voltage applica-
tions utilizing 5V to power the controller and
2.5V to 28V for step down conversion.
The heart of the SP7650 is a wide bandwidth
transconductance amplifier designed to accom-
modate Type II and Type III compensation
schemes. A precision 0.8V reference, present on
the positive terminal of the error amplifier per-
mits the programming of the output voltage
down to 0.8V via the V
FB
pin. The output of the
error amplifier, COMP, compared to a 1.1V
peak-to-peak ramp is responsible for trailing
edge PWM control. This voltage ramp, and
PWM control logic are governed by the internal
oscillator that accurately sets the PWM fre-
quency to 300kHz.
THEORY OF OPERATION
The SP7650 contains two unique control fea-
tures that are very powerful in distributed appli-
cations. First, asynchronous driver control is
enabled during start up, to prohibit the low side
switch from pulling down the output until the
high side switch has attempted to turn on. Sec-
ond, a 100% duty cycle timeout ensures that the
low side switch is periodically enhanced during
extended periods at 100% duty cycle. This guar-
antees the synchronized refreshing of the BST
capacitor during very large duty ratios.
The SP7650 also contains a number of valuable
protection features. Programmable V
IN
UVLO
allows the user to set the exact value at which the
conversion voltage can safely begin down con-
version, and an internal V
CC
UVLO which en-
sures that the controller itself has enough volt-
age to properly operate. Other protection fea-
PIN DESCRIPTION
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相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SP7651 | Wide Input Voltage Range 3A, 900kHz, Buck Regulator |
| SP7652 | Wide Input Voltage Range 6A, 600kHz, Buck Regulator |
| SP7652EB | Evaluation Board Manual |
| SP7652EU | Evaluation Board Manual |
| SP7653 | Wide Input Voltage Range, 1.3MHz,Buck Regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP7650_05 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Evaluation Board Manual |
| SP7650_06 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Wide Input Voltage Range 3A, 300kHz, Buck Regulator |
| SP7650EB | 功能描述:電源管理IC開發(fā)工具 Eval Board for SP7650 Series 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 |
| SP7650ER | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
| SP7650ER/TR | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Wide Input Voltage Range 3A, 300kHz, Buck Regulator |
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