參數(shù)資料
型號(hào)： IR3088MTR
廠商： International Rectifier
英文描述： XPHASE PHASE IC WITH FAULT AND OVERTEMP DETECT
中文描述： XPHASE相集成電路及超溫故障檢測
文件頁數(shù)： 11/34頁
文件大?。?/td> 688K
代理商： IR3088MTR
IR3088
IR3088 THEORY OF OPERATION
Block Diagram
The Block diagram of the IR3088 is shown in Figure 6, and specific features are discussed in the following sections.
RAMP
COMPARATOR
CLOCK
PULSE
GENERATOR
RESET
DOMINANT
+
-
10K
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
VCC
RMPIN+
RMPIN-
EAIN
ISHARE
PWMRMP
SCOMP
BIASIN
LGND
GATEH
VCCH
PGND
GATEL
CSIN+
CSIN-
VCCL
HOTSET
VRHOT
PHSFLT
DACIN
INTERNAL
CIRCUIT
BIAS
SHARE
ADJUST
ERROR
AMP
RAMP
SLOPE
ADJUST
20mV
PWM
LATCH
COMPARATOR
S
R
0% DUTY
CYCLE
COMPARATOR
SYSTEM
REFERENCE
VOLTAGE
X
0.91
GATE
NON-OVERLAP
COMPARATORS
CURRENT
SENSE
AMP
X34
2V
VOLTAGE
PROPORTIONAL
TO ABSOLUTE
TEMPERATURE
VRHOT
COMPARATOR
ENABLE
RAMP
DISCHARGE
CLAMP
FAULT
COMPARATOR
+
+
Figure 6. IR3088 Block Diagram
Tri-State Gate Drivers
The gate drivers can deliver up to 3A peak current. An adaptive non-overlap circuit monitors the voltage on the
GATEH and GATEL pins to prevent MOSFET shoot-through current while minimizing body diode conduction.
An Enable signal is provided by the Control IC to the Phase IC without the addition of a dedicated signal line. The
Error Amplifier output of the Control IC drives low in response to any fault condition such as input under voltage or
output overload. The IR3088 0% duty cycle comparator detects this and drives both gate outputs low. This tri-state
operation prevents negative inductor current and negative output voltage during power-down.
The Gate Drivers revert to a high impedance “off” state if VCCL and VCCH supply voltages are below the normal
operating range. An 80k
resistor is connected across the GATEH/GATEL and PGND pins to prevent the
GATEH/GATEL voltage from rising due to leakage or other causes under these conditions.
Thermal Monitoring (VRHOT)
The IR3088 senses its own die temperature and produces a voltage at the input of the VRHOT comparator that is
proportional to temperature. An external resistor divider connected from VBIAS to the HOTSET pin and ground can
be used to program the thermal trip point of the VRHOT comparator. The VRHOT pin is an open-collector output
and should be pulled up to a voltage source through a resistor. If the thermal trip point is reached the VRHOT output
drives low.
Page 11 of
34
9/30
/04
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IR3092 制造商:IRF 制造商全稱:International Rectifier 功能描述:2 PHASE OPTERON, ATHLON, OR VR10.X CONTROL IC
IR3092M 功能描述:IC CONTROLLER 2PHASE 48-MLPQ RoHS:否 類別:集成電路 (IC) >> PMIC - 電源控制器，監(jiān)視器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 應(yīng)用:多相控制器 輸入電壓:- 電源電壓:9 V ~ 14 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR)
IR3092MPBF 功能描述:IC VID VOLTAGE PROGRAMMER 48MLPQ RoHS:是 類別:集成電路 (IC) >> PMIC - 電源控制器，監(jiān)視器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 應(yīng)用:多相控制器 輸入電壓:- 電源電壓:9 V ~ 14 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR)
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