參數(shù)資料
型號(hào)： IR3080M
廠商： International Rectifier
英文描述： XPHASE VRD10 CONTROL IC WITH VCCVID & OVERTEMP DETECT
中文描述： XPHASE VRD10控制集成電路VCCVID
文件頁(yè)數(shù)： 8/41頁(yè)
文件大小： 2267K
代理商： IR3080M
IR3080
PWM Control Method
The PWM block diagram of the
XPhase
TM
architecture is shown in Figure 2. Feed-forward voltage mode control with
trailing edge modulation is used. A high-gain wide-bandwidth voltage type error amplifier in the Control IC is used
for the voltage control loop. An external RC circuit connected to the input voltage and ground is used to program the
slope of the PWM ramp and to provide the feed-forward control at each phase. The PWM ramp slope will change
with the input voltage and automatically compensate for changes in the input voltage. The input voltage can change
due to variations in the silver box output voltage or due to wire and PCB-trace voltage drop related to changes in
load current.
+
-
10K
+
-
SHARE
ADJUST
ERROR
AMPLIFIER
CURRENT
SENSE
AMPLIFIER
X34
X
0.91
20mV
+
-
+
-
+
-
10K
SHARE
ADJUST
ERROR
AMPLIFIER
CURRENT
SENSE
AMPLIFIER
X34
20mV
X
0.91
+
-
+
-
+
-
+
-
+
-
DACIN
PWMRMP
BIASIN
RAMPIN-
RAMPIN+
GATEH
SCOMP
ISHARE
CSIN+
GATEL
EAIN
CSIN-
SYSTEM
REFERENCE
VOLTAGE
ENABLE
CLOCK
PULSE
GENERATOR
BODY
BRAKING
COMPARATOR
RAMP
DISCHARGE
CLAMP
PWM
LATCH
S
RESET
DOMINANT
PHASE IC
R
PWM
COMPARATOR
RDRP
RPWMRMP
RPHS2
CSCOMP
+
-
RPHS1
+
-
+
-
RCS
RVFB
+
-
CPWMRMP
CSCOMP
CCS
RPWMRMP
RCS
+
-
CPWMRMP
+
-
+
-
CCS
RPHS2
RPHS1
+
-
GND
VOUT
BIASIN
VDAC
VBIAS
DACIN
PWMRMP
RAMPIN+
VOSNS-
VOSNS+
VOSNS-
ISHARE
RAMPIN-
IIN
VDRP
EAIN
GATEH
SCOMP
CSIN-
CSIN+
GATEL
EAOUT
RMPOUT
VIN
FB
IROSC
SYSTEM
REFERENCE
VOLTAGE
VDAC
BODY
BRAKING
COMPARATOR
RAMP
DISCHARGE
CLAMP
ENABLE
CLOCK
PULSE
GENERATOR
VBIAS
REGULATOR
IFB
VDRP
AMP
50%
DUTY
CYCLE
RAMP GENERATOR
VVALLEY
VPEAK
ERROR
AMP
R
S
RESET
DOMINANT
PWM
LATCH
PHASE IC
COUT
CONTROL IC
PWM
COMPARATOR
Figure 2. PWM Block Diagram
Frequency and Phase Timing Control
The oscillator is located in the Control IC and its frequency is programmable from 150kHz to 1MHZ by an external
resistor. The output of the oscillator is a 50% duty cycle triangle waveform with peak and valley voltages of
approximately 5V and 1V respectively. This signal is used to program both the switching frequency and phase
timing of the Phase ICs. The Phase IC is programmed by resistor divider R
PHS1
and R
PHS2
connected between the
VBIAS reference voltage and the Phase IC LGND pin. A comparator in the Phase ICs detects the crossing of the
oscillator waveform over the voltage generated by the resistor divider and triggers a clock pulse that starts the PWM
cycle. The peak and valley voltages track the VBIAS voltage reducing potential Phase IC timing errors. Figure 3
shows the Phase timing for an 8 phase converter. Note that both slopes of the triangle waveform can be used for
phase timing by swapping the RMPIN+ and RMPIN– pins, as shown in Figure 2.
Page 8 of 41
9
/30/04
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參數(shù)描述
IR3080MPBF 功能描述:IC PHASE CONTROLLER 32MLPQ RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:XPhase™ 應(yīng)用說(shuō)明:Ultrasound Imaging Systems Application Note 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:37 系列:- 應(yīng)用:醫(yī)療用超聲波成像，聲納 電流 - 電源:- 電源電壓:2.37 V ~ 6 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:56-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:56-TQFN-EP（8x8） 包裝:管件
IR3080MPBF 制造商:International Rectifier 功能描述:Controller IC Package/Case:32-MLPQ
IR3080MTR 功能描述:IC PHASE CONTROLLER 32L MLPQ RoHS:否 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:XPhase™ 應(yīng)用說(shuō)明:Ultrasound Imaging Systems Application Note 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:37 系列:- 應(yīng)用:醫(yī)療用超聲波成像，聲納 電流 - 電源:- 電源電壓:2.37 V ~ 6 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:56-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:56-TQFN-EP（8x8） 包裝:管件
IR3080MTRPBF 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 XPHASE VRD10 CTRL IC CTRL IC 200 to 700mV 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
IR3080PBF 制造商:IRF 制造商全稱:International Rectifier 功能描述:XPHASETM VRD10 CONTROL IC WITH VCCVID & OVERTEMP DETECT
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