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参数资料
| 型号： | IR3527MTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 14/20页 |
| 文件大小： | 0K |
| 描述： | IC CTRL XPHASE3 DUAL 24-MLPQ |
| 标准包装： | 3,000 |
| 系列： | XPhase3™ |
| 应用： | 处理器 |
| 电流 - 电源： | 8mA |
| 电源电压： | 8 V ~ 28 V |
| 工作温度： | 0°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-MLPQ |
| 供应商设备封装： | 24-MLPQ（4x4） |
| 包装： | 带卷 (TR) |
proper operation of the phase IC is 8 V. If the condition [V CCL ? 9 DACIN + 35(V CSIN+x -V CSIN-x ) + 1.4V] is violated,
IR3527
Emulated Bootstrap Diode
IR3527 integrates a PFET to emulate the bootstrap diode. An external bootstrap diode connected from VCCL
pin to BOOST pin can be added to reduce the drop across the PFET but is not needed in most applications.
PSI Mode
In order to increases the efficiency under light load condition, the IR3527 employs a power state indicator (PSI)
signal to switch off the phase IC at light load. An active low on the PSI indicates the low power state and can be
used to switch off the phase IC. Once the PSI signal is asserted, the IR3527 waits for 8 PHSIN cycles to disable
the gate drives. When the PSI signal is de-asserted again the anti-bias latch circuit ensures that the topFET is
switched on first. The maximum de-assert delay is determined by the CLKIN period.
Operation at Higher Output Voltage
The proper operation of the phase IC is ensured for output voltage up to 5.1V. Similarly, the minimum VCC for
the current sharing performance of the phase IC is affected.
APPLICATIONS INFORMATION
IR3527 EXTERNAL COMPONENTS
Inductor Current Sensing Capacitor C CS and Resistor R CS
The DC resistance of the inductor is utilized to sense the inductor current. Usually the resistor R CS and
capacitor C CS in parallel with the inductor are chosen to match the time constant of the inductor, and therefore
the voltage across the capacitor C CS represents the inductor current. If the two time constants are not the
same, the AC component of the capacitor voltage is different from that of the real inductor current. The time
constant mismatch does not affect the average current sharing among the multiple phases, but does affect the
current signal ISHARE as well as the output voltage during the load current transient if adaptive voltage
positioning is adopted.
Measure the inductance L and the inductor DC resistance R L . Pre-select the capacitor C CS and calculate R CS
as follows.
R CS
L R L
C CS
(1)
Bootstrap Capacitor C BST
Depending on the duty cycle and gate drive current of the phase IC, a capacitor in the range of 0.1uF to 1uF is
needed for the bootstrap circuit.
Decoupling Capacitors for Phase IC
A 0.1uF-1uF decoupling capacitor is required at the VCCL pin.
CURRENT SHARE LOOP COMPENSATION
The internal compensation of current share loop ensures that crossover frequency of the current share loop is
at least one decade lower than that of the voltage loop so that the interaction between the two loops is
eliminated. The crossover frequency of current share loop is approximately 8 kHz.
Page 14 of 20
V3.0
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3529 | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM PHASE IC |
| IR3529MPBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM PHASE IC |
| IR3529MTRPBF | 功能描述:开关变换器、稳压器与控制器 2 CH OR 2 PHASE SYNC PWM CNTRLR 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 |
| IR3531A | 制造商:IRF 制造商全称:International Rectifier 功能描述:41 Phase Dual Output Control IC Pre-bias compatible |
| IR3531A-MPBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:41 Phase Dual Output Control IC Pre-bias compatible |
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