- 您现在的位置：买卖IC网 > PDF目录1809 > IR3521MTRPBF (International Rectifier)IC CTRL XPHASE3 SVID 32-MLPQ PDF资料下载
参数资料
| 型号： | IR3521MTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 35/45页 |
| 文件大小： | 0K |
| 描述： | IC CTRL XPHASE3 SVID 32-MLPQ |
| 标准包装： | 3,000 |
| 系列： | XPhase3™ |
| 应用： | 处理器 |
| 电流 - 电源： | 10mA |
| 电源电压： | 4.75 V ~ 7.5 V |
| 工作温度： | 0°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-MLPQ（5x5） |
| 包装： | 带卷 (TR) |
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页当前第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页
IR3521
Type III Compensation for AVP Applications
Determine the compensation at no load, the worst case condition. Assume the RC, resistor and capacitor across
the output inductors, and L/DCR time constant matches, the crossover frequency and phase margin of the voltage
loop can be estimated by (22) and (23), where R LE is the equivalent resistance of inductor DCR.
f C 1 ?
R DRP
2 ? * C E ? G CS * R FB ? R LE
(22)
? C 1 ? 90 ? A tan( 0 . 5 ) ?
180
?
(23)
Choose the desired crossover frequency fc around fc1, estimated by (22), or choose fc between 1/10 and 1/5 of
the switching frequency per phase. The components should be selected to ensure the close loop gain slope is
-20dB /Dec around the crossover frequency. Choose resistor R FB1 according to (24), and determine C FB and
C DRP from (25) and (26).
R FB 1 ?
1
2
R FB
to
R FB 1 ?
2
3
R FB
(24)
C FB ?
1
4 ? ? f C ? R FB 1
(25)
C DRP ?
( R FB ? R FB 1 ) ? C FB
R DRP
(26)
R CP and C CP have limited effect on the crossover frequency, and are used only to fine tune the crossover
frequency and transient load response. Determine R CP and C CP from (27) and (28).
R CP ?
C CP ?
( 2 ? ? f C ) 2 ? L E ? C E ? R FB ? 5
V I
10 ? L E ? C E
R CP
(27)
(28)
C CP1 is optional and may be needed in some applications to reduce the jitter caused by the high frequency noise.
A ceramic capacitor between 10pF and 220pF is usually enough.
Type III Compensation for Non-AVP Applications
Resistor R DRP and capacitor C DRP are not needed. Choose the crossover frequency fc between 1/10 and 1/5 of
the switching frequency per phase and select the desired phase margin θ c. Calculate K factor from (29), and
determine the component values based on (30) to (34),
? ?
K ? tan[ ? ( C ? 1 . 5 )]
4 180
(29)
R CP ? R FB ?
( 2 ? ? L E ? C E ? f C ) 2 ? 5
V I ? K
(30)
C CP ?
C CP 1 ?
K
2 ? ? f C ? R CP
1
2 ? ? f C ? K ? R CP
Page 35
(31)
(32)
V3.03
相关PDF资料 |
PDF描述 |
|---|---|
| IR3522MTRPBF | IC CTRL XPHASE3 DDR/VVT 32-MLPQ |
| IR3523MTRPBF | IC XPHASE3 CTLR VR11.1 40-MLPQ |
| IR3527MTRPBF | IC CTRL XPHASE3 DUAL 24-MLPQ |
| IR3529MTRPBF | IC CTRL XPHASE CPU/ASIC 20-MLPQ |
| IR3550MTRPBF | IC DRIVER GATE 60A PQFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3522 | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM DDR & VTT CONTROL IC |
| IR3522MPBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM DDR & VTT CONTROL IC |
| IR3522MTRPBF | 功能描述:开关变换器、稳压器与控制器 X-PHASE IR3522 AMD SVID CTRL IC 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 |
| IR3523 | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM DUAL OUTPUT CONTROL IC |
| IR3523MPBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM DUAL OUTPUT CONTROL IC |
发布紧急采购，3分钟左右您将得到回复。