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参数资料
| 型号： | IR3088AMTR |
| 厂商： | International Rectifier |
| 英文描述： | XPHASETM PHASE IC WITH FAULT AND OVERTEMP DETECT |
| 中文描述： | XPHASETM相集成电路及超温故障检测 |
| 文件页数： | 11/34页 |
| 文件大小： | 1264K |
| 代理商： | IR3088AMTR |
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IR3088A
IR3088A THEORY OF OPERATION
Block Diagram
The Block diagram of the IR3088A is shown in figure 6, and specific features are discussed in the following sections.
RAMP
COMPARATOR
CLOCK
PULSE
GENERATOR
RESET
COMPARATOR
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
PWM
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
ENABLE
RAMP
DISCHARGE
CLAMP
FAULT
COMPARATOR
+
+
Figure 6. IR3088A 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 IR3088A 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 cause under these conditions.
Thermal Monitoring (VRHOT)
The IR3088A 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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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3088AMTRPBF | 功能描述:开关变换器、稳压器与控制器 XPHASE IC W/ FAULT OVERTEMP DETECT 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 |
| IR3088APBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASETM PHASE IC WITH FAULT AND OVERTEMP DETECT |
| IR3088M | 功能描述:IC XPHASE W/FAULT DET 20L-MLPQ RoHS:否 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:XPhase™ 应用说明:Ultrasound Imaging Systems Application Note 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:37 系列:- 应用:医疗用超声波成像，声纳 电流 - 电源:- 电源电压:2.37 V ~ 6 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:56-WFQFN 裸露焊盘 供应商设备封装:56-TQFN-EP（8x8） 包装:管件 |
| IR3088MPBF | 功能描述:IC CONTROLLER PHASE 20L-MLPQ RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:XPhase™ 应用说明:Ultrasound Imaging Systems Application Note 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:37 系列:- 应用:医疗用超声波成像，声纳 电流 - 电源:- 电源电压:2.37 V ~ 6 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:56-WFQFN 裸露焊盘 供应商设备封装:56-TQFN-EP（8x8） 包装:管件 |
| IR3088MTR | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE PHASE IC WITH FAULT AND OVERTEMP DETECT |
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