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参数资料
| 型号： | IR3086AMPBF |
| 厂商： | International Rectifier |
| 文件页数： | 11/33页 |
| 文件大小： | 0K |
| 描述： | IC PHASE CONTROLLER OVP 20MLPQ |
| 标准包装： | 100 |
| 系列： | XPhase™ |
| 应用： | 处理器 |
| 电流 - 电源： | 10mA |
| 电源电压： | 8.4 V ~ 14 V |
| 工作温度： | 0°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-MLPQ |
| 供应商设备封装： | 20-MLPQ（4x4） |
| 包装： | 剪切带 (CT) |
| 其它名称： | *IR3086AMPBF |
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IR3086APbF
IR3086A THEORY OF OPERATION
Block Diagram
The Block diagram of the IR3086A is shown in Fig. 6, and specific features are discussed in the following sections.
RAMP
COMPARATOR
PWM
LATCH
VCCH
RMPIN+
RMPIN-
EAIN
CLOCK
PULSE
GENERATOR
PWM
COMPARATOR
-
S
RESET
DOMINANT
R
-
GATEH
REFERENCE
GATE
BIASIN
SYSTEM
BIASIN
ENABLE
+
+
NON-OVERLAP
2V
PWMRMP
VOLTAGE
RAMP
ENABLE
COMPARATORS
RAMP
SLOPE
VDAC
DISCHARGE
CLAMP
BODY BRAKING
COMPARATOR
VCCL
ADJUST
SHARE
GATEL
PGND
OVP
CIRCUIT
SCOMP
ISHARE
10K
ADJUST
SCOMP ERROR
AMP
+
20mV
+
X
0.91
CURRENT
SENSE
-
+
COMPARATOR
+
125mV
-
INTERNAL
VCC
BIAS
VCC
DACIN
LGND
VRHOT
HOTSET
-
VRHOT
COMPARATOR
+
-
VDAC +
VDAC
VOLTAGE
PROPORTIONAL
TO ABSOLUTE
TEMPERATURE
AMP
X34
FAULT
COMPARATOR
CSIN+
CSIN-
PHSFLT
output overload. The IR3086A Body Braking
comparator detects this and drives both gate outputs low. This tri-
Figure 6 – IR3086A 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
TM
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.
Over Voltage Protection (OVP)
The IR3086A includes over-voltage protection that turns on the low side MOSFET to protect the load in the event of
a shorted high-side MOSFET or connection of the converter output to an excessive output voltage. A comparator
monitors the voltage at the CSIN- pin which is usually connected directly to the converter output. If the voltage
exceeds the DACIN voltage plus 125mV typical (100mV minimum and 160mV maximum) the GATEL pin drives
high. The OVP circuit overrides the normal PWM operation and will fully turn-on the low side MOSFET within
approximately 150ns. The low side MOSFET will remain ON until the over-voltage condition ceases.
Page 11 of 33
May 13, 2009
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3086AMPBF | 制造商:International Rectifier 功能描述:Controller IC Package/Case:20-MLPQ |
| IR3086AMTR | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASETM PHASE IC WITH OVP, FAULT AND OVERTEMP DETECT |
| IR3086AMTRPBF | 功能描述:开关变换器、稳压器与控制器 XPHASE PHASE IC Overtemp 2.5A 200ns 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 |
| IR3086AMTRPBF-CUT TAPE | 制造商:IR 功能描述:IR3086APbF Series 14 V 400 KHz Phase IC Combined with an IR XPhaseTM Control IC |
| IR3086APBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE PHASE IC WITH OVP, FAULT AND OVERTEMP DETECT |
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