- 您现在的位置：买卖IC网 > PDF目录1809 > IR3521MTRPBF (International Rectifier)IC CTRL XPHASE3 SVID 32-MLPQ PDF资料下载
参数资料
| 型号： | IR3521MTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 29/45页 |
| 文件大小： | 0K |
| 描述： | IC CTRL XPHASE3 SVID 32-MLPQ |
| 标准包装： | 3,000 |
| 系列： | XPhase3™ |
| 应用： | 处理器 |
| 电流 - 电源： | 10mA |
| 电源电压： | 4.75 V ~ 7.5 V |
| 工作温度： | 0°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-MLPQ（5x5） |
| 包装： | 带卷 (TR) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页当前第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页
IR3521
C VDAC ?
I SINK
SR DOWN
(5)
R VDAC ? 0 . 5 ?
3 . 2 ? 10 ? 15
C VDAC 2
(6)
Over Current Setting Resistor R OCSET
The inductor DC resistance is utilized to sense the inductor current. The copper wire of inductor has a constant
temperature coefficient of 3850 ppm/°C, and therefore the maximum inductor DCR can be calculated from (7), where
R L_MAX and R L_ROOM are the inductor DCR at maximum temperature, T L_MAX, and room temperature, T L _ ROOM,
respectively.
R L _ MAX ? R L _ ROOM ? [ 1 ? 3850 * 10 ? 6 ? ( T L _ MAX ? T L _ ROOM )]
(7)
The total input offset voltage (V CS_TOFST ), of the phase IC’s current sense amplifier, is the sum of input offset
(V CS_OFST) of the amplifier itself and that created by the amplifier input bias current flowing through the current sense
resistor R CS .
V CS _ TOFST ? V CS _ OFST ? I CSIN ? ? R CS
(8)
The over-current limit is set by the external resistor R OCSET as defined in (9). I LIMIT is the required over-current limit.
I OCSET is the bias current of OCSET pin and can be calculated with the equation located in the ELECTRICAL
CHARACTERISTICS Table. G CS is the gain of the current sense amplifier. K P is the ratio of inductor peak current
over the average current in each phase and can be calculated using equation (10).
R OCSET ? [
I LIMIT
n
? R L _ MAX ? ( 1 ? K P ) ? V CS _ TOFST ] ? G CS / I OCSET
(9)
K P ?
( V I ? V O ) ? V O /( L ? V I ? f SW ? 2)
I O / n
(10)
VCCL Programming Resistor R VCCLFB1 and R VCCLFB2
Since VCCL voltage is proportional to the MOSFET gate driver loss and inversely proportional to the MOSFET
conduction loss, the optimum voltage should be chosen to maximize the converter efficiency. VCCL linear
regulator consists of an external NPN transistor, a ceramic capacitor and a programmable resistor divider. Pre-
select R VCCLFB1 , and calculate R VCCLFB2 from (11).
R VCCLFB 2 ?
R VCCLFB 1 * 1 .23
VCCL ? 1 . 23
(11)
No Load Offset Setting Resistor RFB11, RFB13, RTHERM1 and Adaptive Voltage Positioning Resistor
RDRP11 for Output1
Define R FB_R as the effective offset resistor at room temperature equals to R FB11 //(R FB13 +R THERM1 ). Given the
offset voltage V O_NLOFST (offset above the DAC voltage) and calculating the sink current from the FB1 pin I FB1, using
the equation in the ELECTRICAL CHARACTERISTICS Table, the effective offset resistor value, R FB1, can be
determined from equation (12).
Page 29
V3.03
相关PDF资料 |
PDF描述 |
|---|---|
| IR3522MTRPBF | IC CTRL XPHASE3 DDR/VVT 32-MLPQ |
| IR3523MTRPBF | IC XPHASE3 CTLR VR11.1 40-MLPQ |
| IR3527MTRPBF | IC CTRL XPHASE3 DUAL 24-MLPQ |
| IR3529MTRPBF | IC CTRL XPHASE CPU/ASIC 20-MLPQ |
| IR3550MTRPBF | IC DRIVER GATE 60A PQFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3522 | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM DDR & VTT CONTROL IC |
| IR3522MPBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM DDR & VTT CONTROL IC |
| IR3522MTRPBF | 功能描述:开关变换器、稳压器与控制器 X-PHASE IR3522 AMD SVID CTRL IC 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 |
| IR3523 | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM DUAL OUTPUT CONTROL IC |
| IR3523MPBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM DUAL OUTPUT CONTROL IC |
发布紧急采购，3分钟左右您将得到回复。