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| 型号： | MAX1980ETP+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/33页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM 20-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 系列： | Quick-PWM™ |
| PWM 型： | 控制器 |
| 输出数： | 1 |
| 频率 - 最大： | 550kHz |
| 占空比： | 50% |
| 电源电压： | 4.5 V ~ 5.5 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | 0°C ~ 85°C |
| 封装/外壳： | 20-WQFN 裸露焊盘 |
| 包装： | 管件 |
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Quick-PWM Slave Controller with
Driver Disable for Multiphase DC-DC Converter
Table 2. Component Suppliers
MANUFACTURER
MOSFETS
Fairchild Semiconductor
International Rectifier
Siliconix
CAPACITORS
Kemet
Panasonic
Sanyo
Taiyo Yuden
INDUCTORS
Coilcraft
Coiltronics
Sumida
PHONE
COUNTRY CODE
1-888-522-5372
1-310-322-3331
1-203-268-6261
1-408-986-0424
1-847-468-5624
65-281-3226 (Singapore)
1-408-749-9714
03-3667-3408 (Japan)
1-408-573-4150
1-800-322-2645
1-561-752-5000
1-408-982-9660
WEBSITE
www.fairchildsemi.com
www.irf.com
www.vishay.com
www.kemet.com
www.panasonic.com
www.secc.co.jp
www.t-yuden.com
www.coilcraft.com
www.coiltronics.com
www.sumida.com
t ON = K ? COMP ?
= K ? OUT ? + K ? COMP C ?
The trigger input ’ s polarity is selected by connecting
POL to V CC (rising edge) or to GND (falling edge).
At the slave controller ’ s core is the one-shot that sets
the high-side switch ’ s on-time. This fast, low-jitter one-
shot adjusts the on-time in response to the input volt-
age and the difference between the inductor currents in
the master and the slave. Two identical transconduc-
tance amplifiers (G MM = G MS ) integrate the difference
between the master and slave current-sense signals.
The summed output is connected to COMP, allowing
adjustment of the integration time constant with a com-
pensation capacitor connected at COMP. The resulting
compensation current and voltage may be determined
by the following equations:
I COMP = G MM ( V CM + - V CM - ) - G MS ( V CS + - V CS - )
V COMP = V OUT + I COMP Z COMP
where Z COMP is the impedance at the COMP output.
The PWM controller uses this integrated signal (V COMP )
to set the slave controller ’ s on time. When the master
and slave current-sense signals (CM+ to CM- and CS+
to CS-) become unbalanced, the transconductance
amplifiers adjust the slave controller ’ s on time, allowing
the slave inductor current to increase or decrease until
the current-sense signals are properly balanced:
? V ?
? V IN ?
? V ? ? I Z ?
? V IN ? ? V IN ?
= (Master ’ s on time) + (Slave ’ s on-time
correction due to current imbalance)
This control algorithm results in balanced inductor cur-
rents with the slave switching frequency synchronized to
the master. Since the master operates at nearly constant
frequency, the slave will as well. The benefits of a con-
stant switching frequency are twofold: first, the frequency
can be selected to avoid noise-sensitive regions of the
spectrum; second, the inductor ripple-current operating
point remains relatively constant, resulting in easy design
methodology and predictable output-voltage ripple.
Multiple phase switching effectively distributes the load
among the external components, thereby improving the
overall efficiency. Distributing the load current between
multiple phases lowers the peak inductor current by the
number of phases (1/ η ) when compared to a single-
phase converter. This significantly reduces the I 2 R losses
across the inductor ’ s series resistance, the MOSFETs
on-resistance, and the board resistance.
12
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1980ETP+ | 功能描述:DC/DC 开关控制器 PWM Slave Controller w/Driver Disable RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1980ETP+T | 功能描述:DC/DC 开关控制器 PWM Slave Controller w/Driver Disable RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1980ETP+TG075 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1980ETP-T | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1980ETP-TG075 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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