参数资料
| 型号： | IR3510MPBF |
| 厂商： | International Rectifier |
| 文件页数： | 24/36页 |
| 文件大小： | 0K |
| 描述： | IC XPHASE CONTROL 32-MLPQ |
| 标准包装： | 100 |
| 系列： | XPhase™ |
| 应用： | 处理器 |
| 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： | 剪切带 (CT) |
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IR3510
Current Error Amplifier
The voltage error amplifier output, IREF, is connected to the non-inverting input of the current error amplifier. The
current report output, IO, is connected to the “IFB” pin through a feedback resistor, and then connected to the
inverting input of the current error amplifier.
The voltage error amplifier has minimum output voltage since it is powered from a single power supply. In order to
keep the current error amplifier under control at no-load condition, a 300mv offset is added to the current feedback
input of the current error amplifier, as seen in Fig. 12.
Constant Current Limit
Constant current limit function is required for paralleled redundant system. With average current mode control, the
constant current limit can be easily implemented by clamping the current reference signal, which is the output of
voltage error amplifier and also the non-inverting input of the current error amplifier.
An OC clamping amplifier is used to buffer the “OCPSET” voltage from the system. Its output is connected together
with the current reference signal, so it clamps the current reference voltage to be no more than the “OCPSET”
voltage. To compensate the 300mv offset voltage in the current feedback signal, a same 300mv offset voltage is
added to the OC clamp amplifier input.
Remote Voltage Sense Amplifier
VOSEN+ and VOSEN- are used for remote sensing and connected directly to the load. The remote sense
differential amplifier with high speed, low input offset and low input bias current ensures accurate voltage sensing
and fast transient response.
Since the remote voltage sense amplifier has limited input impedance, any impedance in series with the remote
sense lines will affect the voltage sense accuracy. If a voltage feedback divider is needed to match the VSET
voltage, it’s better to place the voltage divider at the remote sense amplifier output, that is, “VO” pin.
ORing Comparator and Oring FET Driver
The Oring comparator monitors the voltage across the
Oring FET, which is produced by the current going
Vout+
Vout
through the Rds(on) of the Oring FET.
Oring FET is turned once it develops positive voltage
Vcc
Charge Pump
3K
Rrcset
GATE_O
from SOURCE to DRAIN. Since the Oring FET gate
charge current from the Charge Pump is only 10uA, it
10uA
takes some time to fully turn on the Oring FET. An
internal 3K pull-up resistor is connected from
OR+
OR-
-
+
ORING
VIDSEL
“GATE_O” to Vcc to speed up the Oring FET turn-on.
IROSC
COMPARATOR
ORING
20uA
pulled down with 2A peak discharge current.
When a negative voltage is detected and it is exceed
the threshold voltage set by the programming resistor in
series with the “OR-“ pin, the “GATE_O” is quickly
ig.
VR Fault
Fig. 13 Oring Comparator
A 30mv hesteresis is added to the Oring comparator to prevent it from chattering and ensure it is only turned
off with negative input. The current source flowing into the “IR-“ pin, which is used to program the reverse
current cut-off threshold through an external resistor, is determined by the switching frequency in order to
achieve good accuracy. It increases with the switching frequency.
An open-collector output “ORING” signal indicates the Oring FET status. HIGH means the Oring FET has
positive load current, and LOW means the Oring FET is OFF or carrying negative current.
Page 24 of 36
IR Confidential
May 18, 2009
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PDF描述 |
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| IR3521MTRPBF | IC CTRL XPHASE3 SVID 32-MLPQ |
| IR3522MTRPBF | IC CTRL XPHASE3 DDR/VVT 32-MLPQ |
| IR3523MTRPBF | IC XPHASE3 CTLR VR11.1 40-MLPQ |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3510MTRPBF | 功能描述:热插拔功率分布 HOT-SWAP N+1 XPHASE CTRL IC RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| IR3513MTRPBF | 功能描述:开关变换器、稳压器与控制器 2 CH OR 2 PHASE SYNC PWM CNTRLR 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 |
| IR3513XMTRPBF | 功能描述:功率驱动器IC RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| IR3513Z | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM POL CONTROL IC |
| IR3513ZMPBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM POL CONTROL IC |
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