參數(shù)資料
型號(hào)： IR3500MPBF
廠(chǎng)商： International Rectifier
英文描述： XPHASE3TM VR11.0 & AMD PVID CONTROL IC
中文描述： XPHASE3TM VR11.0
文件頁(yè)數(shù)： 22/47頁(yè)
文件大?。?/td> 778K
代理商： IR3500MPBF
IR3500
Page 22 of 47
June 12, 2007
OVER-CURRENT
PROTECTION
(OUTPUT SHORTED)
NORMAL
OPERATION
3.88V
1.1V
EA
HICCUP OVER-CURRENT
PROTECTION (OUTPUT
SHORTED)
POWER-DOWN
OCP
DELAY
START-UP WITH
OUTPUT SHORTED
NORMAL
OPERATION
3.92V
SS/DEL
IOUT
VOUT
VRRDY
ENABLE
OCP THRESHOLD
4.0V
NORMAL
START-UP
(OUTPUT
SHORTED)
NORMAL
START-UP
INTERNAL
OC DELAY
Figure 13 - Over Current Protection waveforms during and after soft start
Linear Regulator Output (VCCL)
The IR3500 has a built-in linear regulator controller, and only an external NPN transistor is needed to create a linear
regulator. The output voltage of the linear regulator can be programmed between 4.75V and 7.5V by the resistor
divider at VCCLFB pin. The regulator output powers the gate drivers and other circuits of the phase ICs along with
circuits in the control IC, and the voltage is usually programmed to optimize the converter efficiency. The linear
regulator can be compensated by a 4.7uF capacitor at the VCCL pin. As with any linear regulator, due to stability
reasons, there is an upper limit to the maximum value of capacitor that can be used at this pin and it’s a function of
the number of phases used in the multiphase architecture and their switching frequency. Figure 14 provides Bode
plots for the linear regulator with 5 phases switching at 750 kHz.
An external 5V can be connected to this pin to replace the linear regulator with appropriate selection of the VCCLFB
resistor divider, and VCCLDRV resistor. While using an external VCCL its essential to adjust it such that VCCLFB is
slightly higher than the 1.19V reference voltage. This condition ensures that the VCCLDRV pin doesn’t load the
ROSC pin. The switching frequency, VSETPT, and OCSET are derived from the loading current of ROSC pin.
Figure 14 - VCCL regulator stability with 5 phases and PHSOUT equals 750 kHz.
相關(guān)PDF資料
PDF描述
IR3500MTRPBF XPHASE3TM VR11.0 & AMD PVID CONTROL IC
IR3623MPBF HIGH FREQUENCY 2-PHASE, SINGLE OR DUAL OUTPUT SYNCHRONOUS STEP DOWN CONTROLLER WITH OUTPUT TRACKING AND SEQUENCING
IR3624MPBF HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER
IR3624MTRPBF HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER
IR4426 DUAL LOW SIDE DRIVER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
IR3500MTRPBF 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 COMPLETE VR11.0 OR AMD PVID PWR SOLTION RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
IR3500V 制造商:IRF 制造商全稱(chēng):International Rectifier 功能描述:XPHASE3TM VR11.1 CPU VTT CONTROL IC
IR3500VMPBF 制造商:IRF 制造商全稱(chēng):International Rectifier 功能描述:XPHASE3TM VR11.1 CPU VTT CONTROL IC
IR3500VMTRPBF 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 X-PHASE IR3500V AMD SVID CTRL IC RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
IR3502 制造商:IRF 制造商全稱(chēng):International Rectifier 功能描述:XPHASE3TM CONTROL IC
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