- 您现在的位置：买卖IC网 > PDF目录13785 > IP1827TRPBF (International Rectifier)IC REG BUCK SYNC ADJ 25A LGA PDF资料下载
参数资料
| 型号： | IP1827TRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 16/39页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 25A LGA |
| 标准包装： | 2,000 |
| 系列： | iPOWIR™ |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.6 V ~ 12 V |
| 输入电压： | 1.5 V ~ 16 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 225kHz ~ 1.65MHz |
| 电流 - 输出： | 25A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 17-LLGA |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 17-LGA（7.65x7.65） |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页当前第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页
Highly ? Integrated ? 25A Single ‐ input ? Voltage, ?
Synchronous ? Buck ? Regulator ?
iP1827
An ? overcorrect ? detection ? trips ? the ? OCP ? comparator, ?
latches ? OCP ? signal ? and ? cycles ? the ? soft ? start ? function ? in ?
hiccup ? mode. ? The ? hiccup ? is ? performed ? by ? shorting ? the ??
soft ‐ start ? capacitor ? to ? ground ? and ? counting ? the ? number ? of ?
switching ? cycles. ? The ? Soft ? Start ? pin ? is ? held ? low ? until ? 4096 ?
cycles ? have ? been ? completed. ? Following ? this, ? the ? OCP ? signal ?
resets ? and ? the ? converter ? recovers. ? After ? every ? soft ? start ?
cycle, ? the ? converter ? stays ? in ? this ? mode ? until ? the ? overload ?
or ? short ? circuit ? is ? removed. ??
For ? the ? iP1827, ? the ? Sync ? FET ? is ? turned ? OFF ? on ? the ? falling ?
edge ? of ? a ? PWMSet ? or ? Clock ? signal ? that ? has ? duration ? of ? 25% ?
of ? the ? switching ? period. ? For ? operation ? at ? the ? maximum ?
duty ? cycle, ? the ? OCP ? circuit ? samples ? current ? for ? 40 ? ns, ?
starting ? 40 ? ns ? after ? the ? low ? drive ? signal ? for ? the ? Sync ? FET ? > ?
70% ? of ? PVcc. ?
T ABLE ? 2: ? O VERCURRENT ? SETTING ? VS . ? E XTERNAL ? R OCSET ? ?
For ? operating ? duty ? cycles ? less ? than ? the ? maximum ? duty ?
cycle ? of ? 75%, ? the ? OCP ? circuit ? still ? samples ? current ? for ?
typically ? 40ns, ? but ? starts ? sampling ? 40 ? ns ? after ? the ? rising ?
edge ? of ? PWMSet. ? Thus, ? for ? low ? duty ? cycle ? operation, ? the ?
inductor ? current ? is ? sensed ? close ? to ? the ? valley. ? This ? allows ? a ?
longer ? delay ? after ? the ? falling ? edge ? of ? the ? switch ? node, ? than ?
the ? corresponding ? delay ? for ? an ? over ‐ current ? sensing ?
scheme ? which ? samples ? the ? current ? at ? the ? peak ? of ? the ?
inductor ? current. ? This ? longer ? delay ? serves ? to ? filter ? out ? any ?
noise ? on ? the ? switch ? node ? and ? hence ? on ? the ? OCSet ? pin, ?
making ? this ? method ? more ? immune ? to ? false ? tripping. ?
THERMAL ? SHUTDOWN ??
Temperature ? sensing ? is ? provided ? inside ? iP1827. ??
The ? trip ? threshold ? is ? typically ? set ? to ? 145 o C. ? When ? the ??
trip ? threshold ? is ? exceeded, ? thermal ? shutdown ? turns ??
off ? both ? MOSFETs ? and ? discharges ? the ? soft ? start ? capacitor. ?
I otrip ? (A) ?
15 ?
16 ?
17 ?
18 ?
19 ?
20 ?
21 ?
22 ?
23 ?
24 ?
25 ?
26 ?
27 ?
28 ?
29 ?
30 ?
31 ?
32 ?
33 ?
34 ?
35 ?
External?Rocset?(kohm)?
2.61 ?
2.94 ?
3.24 ?
3.65 ?
4.02 ?
4.53 ?
4.99 ?
5.62 ?
6.34 ?
7.15 ?
8.06 ?
9.09 ?
10.5 ?
12.1 ?
14.3 ?
16.9 ?
20.5 ?
26.1 ?
34 ?
48.7 ?
80.6 ?
Automatic ? restart ? is ? initiated ? when ? the ? sensed ?
temperature ? drops ? within ? the ? operating ? range. ? There ??
is ? a ? 20 o C ? hysteresis ? in ? the ? thermal ? shutdown ? threshold. ?
TRIMMABLE ? RISING ? EDGE ? DEADBAND ??
The ? iP1827 ? has ? a ? rising ? edge ? deadband ? that ? is ? post ‐
package ? trimmable. ? It ? is ? typically ? trimmed ? to ? 5ns ‐ 10ns ?
which ? is ? an ? optimal ? range ? to ? minimize ? switching ? transition ?
loss ? and ? at ? the ? same ? time, ? prevent ? cross ? conduction. ?
REMOTE ? VOLTAGE ? SENSING ?
True ? differential ? remote ? sensing ? in ? the ? feedback ? loop ? is ?
critical ? to ? high ? current ? applications ? where ? the ? output ?
voltage ? across ? the ? load ? may ? differ ? from ? the ? output ? voltage ?
measured ? locally ? across ? an ? output ? capacitor ? at ? the ? output ?
inductor, ? and ? to ? applications ? that ? require ? die ? voltage ?
sensing. ??
The ? Vosp ? and ? Vosm ? pins ? of ? the ? iP1827 ? form ? the ? inputs ? to ??
a ? remote ? sense ? differential ? amplifier ? with ? high ? speed, ? low ?
input ? offset ? (post ‐ package ? trimmed ? to ? +/ ‐ 3mV) ? and ? low ?
input ? bias ? current ? which ? ensure ? accurate ? voltage ? sensing ?
and ? fast ? transient ? response ? in ? such ? applications. ?
It ? should ? be ? noted, ? however, ? that ? the ? output ? Voso ? of ? the ?
difference ? amplifier ? also ? forms ? the ? input ? toa ? power ? good ?
comparator ? and ? overvoltage ? comparator, ? both ? referenced ?
to ? an ? upper ? threshold ? of ? 0.7V ? as ? discussed ? in ? the ? next ?
?
36 ?
37 ?
226 ?
Open ?
section. ? Hence, ? in ? applications ? where ? Vo ? > ? 0.6V, ? it ? is ?
necessary ? to ? use ? a ? resistive ? divider ? network ? after ? Vo ? to ?
attenuate ? the ? sensed ? output ? voltage ? signal ? between ? the ?
remote ? Vo ? and ? the ? remote ? ground ? to ? 0.6V, ? which ? is ? then ?
applied ? between ? Vosp ? and ? Vosm. ?
16
March ? 5, ? 2012 ??? | ??? V1.4 ?
97599
相关PDF资料 |
PDF描述 |
|---|---|
| SCRH4D28-2R7 | INDUCTOR SMD 2.7UH 1.60A 100KHZ |
| ACC06DRAI-S734 | CONN EDGECARD 12POS .100 R/A PCB |
| MAX6723AUTYDD3+T | IC SUPERVISOR MPU SOT23-6 |
| SCRH4D28-270 | INDUCTOR SMD 27UH 0.58A 100KHZ |
| RCC44DRYS | CONN EDGECARD 88POS DIP .100 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IP1827TRPBF-CUT TAPE | 制造商:IR 功能描述:IP1827 Series Integrated 25 A Single-input Voltage Synchronous Buck Regulator |
| IP1837 | 制造商:IRF 制造商全称:International Rectifier 功能描述:Highly Integrated 35A Singlea??input Voltage, Synchronous Buck Regulator |
| IP1837PBF | 功能描述:电源管理IC开发工具 35A 1.5V to 16V REG iPOWIR 1.5MHz RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| IP1837TRPBF | 功能描述:开关变换器、稳压器与控制器 35A iPOWIR 1.5MHz Pvin 1.5V to 16V REG RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| IP1842 | 制造商:SEME-LAB 制造商全称:Seme LAB 功能描述:CURRENT MODE REGULATING PULSE WIDTH MODULATORS |
发布紧急采购，3分钟左右您将得到回复。