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| 型号： | MAX15034BAUI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 22/26页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM 28TSSOP-EP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| PWM 型： | 电流模式 |
| 输出数： | 1 或 2 |
| 频率 - 最大： | 1MHz |
| 电源电压： | 4.75 V ~ 5.5 V，5 V ~ 28 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： | -40°C ~ 125°C |
| 封装/外壳： | 28-SOIC（0.173"，4.40mm 宽）裸露焊盘 |
| 包装： | 管件 |
Configurable, Single-/Dual-Output, Synchronous
Buck Controller for High-Current Applications
SENSE RESISTOR (INDUCTIVE)
L OUT
ESL
R SENSE
MAX15034
LX_
R1
C1
V OUT
CSP_
CSN_
Figure 10. Inductive Sense Resistor
C2
R2
C3
The MAX15034 provides precision average current-limit
programmability while using standard sense resistors
or shunts. Use the equation below to determine the
appropriate V AVGLIMIT external reference voltage at
AVGLIMIT:
V AVGLIMIT = ( 56 × R SENSE [ m ? ] × I LOAD ( MAX ) [ A ] ) + 6 12 . 5 mV
For example, assuming the desired average current
limit is 18A, and R SENSE = 2m ? .
V AVGLIMIT = ( 2 m ? × 36 × 18 A ) + 612 . 5 mV
Programming the Average Current Limit
The MAX15034 average current-limit reference voltage
is set by connecting a resistor-divider network from
REG to AGND, the center node is connected to
AVGLIMIT. The resistive divider’s upper resistor, R1, is
connected between REG and the AVGLIMIT. The resis-
tive divider’s lower resistor, R2, is connected between
the AVGLIMIT and AGND.
The resistor-divider values are determined by first,
choosing R2. To minimize reference noise select R2
such that (R1 + R2) < 100k ? ; a typical value is 10k ? .
Next, determine R1 from:
R 1 = R 2 × ?
? 1 ?
= 1910 mV = 1 . 91 V
where R SENSE is determined from maximum load cur-
? V REG
? V AVGLIMIT
?
?
= 10 k ? × ?
? 1 ?
rent, wattage rating, and circuit parasitics (see above)
and I LOAD(MAX) from circuit requirements. V AVGLIMIT is
the average current-limit reference voltage selected for
? 5 V
? V AVGLIMT ( MAX ) [ V ]
?
?
a desired I LOAD(MAX) and is set by a resistive voltage-
divider from REG to AGND. See the Programming the
From the example above, assuming V AVGLIMIT = 1.91V:
R 1 = 10 k ? × ?
? 1 ? = 16 . 18 k ?
Average Current Limit section.
The second current-protection circuit is the hiccup fault
protection as explained in the Hiccup Fault Protection
? 5 V
? 1 . 91 V
?
?
section. The average current during a short at the out-
put is given by:
A standard value for R1 is 16.2k ? . Connect AVGLIMIT
I AVG ( SHORT ) = 0 . 0625 × I LOAD ( MAX )
to AGND for default current limit
? 20.4mV ?
? ?
? R SENSE ? .
22
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX15034BAUI+ | 功能描述:DC/DC 开关控制器 Configurable Synchronous Buck 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 |
| MAX15034BAUI+T | 功能描述:DC/DC 开关控制器 Configurable Synchronous Buck 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 |
| MAX15034BEVKIT+ | 功能描述:电源管理IC开发工具 MAX15034B Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX15035ETL+ | 功能描述:电压模式 PWM 控制器 15A Step-Down Reg w/Internal Switch RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX15035ETL+T | 功能描述:电压模式 PWM 控制器 15A Step-Down Reg w/Internal Switch RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
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