参数资料
| 型号： | MAX17497AATE+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 25/30页 |
| 文件大小： | 0K |
| 描述： | IC OFF-LINE CONVERTER 16TQFN |
| 产品培训模块： | Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 输出隔离： | 隔离 |
| 频率范围： | 235kHz ~ 265kHz |
| 输入电压： | 4.5 V ~ 29 V |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 16-WFQFN 裸露焊盘 |
| 供应商设备封装： | 16-TQFN-EP（3x3） |
| 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页当前第25页第26页第27页第28页第29页第30页
MAX17497A/MAX17497B
AC-DC and DC-DC Peak Current-Mode Converters
with Integrated Step-Down Regulator
value of the input inductor taking into account tolerance
where:
? V OUTF × D MAX × (1 ? D MAX ) ?
Characteristics section. = ? ? for D MAX < 0.5
?
?
OUTF ? for D
applications due to their stability over temperature. The = ? L
? I LIN MAX ≥ 0.5
? ?
IN SW ? ?
and saturation effects. f SWMIN is the minimum switch-
ing frequency for the MAX17497B from the Electrical
L IN × f SW
Output-Capacitor Selection
X7R ceramic output capacitors are preferred in industrial ? 0.25 × V ?
× f
output capacitor is usually sized to support a step load
of 50% of the maximum output current in the application,
such that the output-voltage deviation is contained to 3%
of the output-voltage change. The output capacitance
can be calculated as:
Error-Amplifier Compensation Design
The loop-compensation values for the error amplifier can
now be calculated as:
C OUTF = STEP RESPONSE
I × t
? V OUTF
R Z =
90 × V OUTF 2 × C OUTF × (1 ? D MAX )
I OUTF × L IN
+
t RESPONSE ? (
0.33 1
f C f SW
)
where D MAX is the duty cycle at the lowest operating input
voltage and I OUTF_MAX is the maximum load current:
C Z = OUTF OUTF
C P =
? V COUTF = MAX
0.41 × (V OUTF ? V INMIN )
S E = V per μs
3.75 × I OUTF
? V INMIN × f SW × (1 ? D MAX ) ?
where I STEP is the load step, t RESPONSE is the response
time of the controller, D V OUTF is the allowable output-
voltage deviation, and f C is the target closed-loop
crossover frequency. f C is chosen as 1/10 the switch-
ing frequency (f SW ). For the boost converter, the output
capacitor supplies the load current when the main switch
is on, and therefore the output-voltage ripple is a function
of duty cycle and load current. Use the following equa-
tion to calculate the output-capacitor ripple:
I OUTF × D
C OUTF × f SW
Input-Capacitor Selection
The input ceramic capacitor value required can be
calculated based on the ripple allowed on the input DC
bus. The input capacitor should be sized based on the
RMS value of the AC current handled by it. The calcula-
tions are as:
? ?
C INF = ? ?
The input-capacitor RMS current can be calculated as:
V × C
2 × I OUTF × R Z
1
π × f SW × R Z
Slope-Compensation Ramp
The slope required to stabilize the converter at duty
cycles greater than 50% can be calculated as:
L IN
where L IN is in F H.
Output Diode Selection
The design procedure for output diode selection is identi-
cal to that outlined in the DCM Boost section.
Maxim Integrated
I CIN_RMS =
? I LIN
2 × 3
25
相关PDF资料 |
PDF描述 |
|---|---|
| MAX17498AATE+T | IC OFF-LINE CONVERTER 16TQFN |
| MAX17500BEUB+ | IC REG CTRLR BST ISO PWM 10-UMAX |
| MAX17510ATB+T | IC REG DDR LOW VOLTAGE 10-TDFN |
| MAX17528GTJ+T | IC CTLR PWM VID PS 1PH 32-TQFN |
| MAX17535ETG+T | IC SMBUS BATT CHARGER 24TQFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX17497AEVKIT# | 功能描述:电源管理IC开发工具 MAX17497 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 |
| MAX17497BATE+ | 功能描述:电流型 PWM 控制器 Univ AC/DC-Iso DC/DC Flyback controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX17497BATE+T | 功能描述:电流型 PWM 控制器 Univ AC/DC-Iso DC/DC Flyback controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX17498AATE+ | 功能描述:电流型 PWM 控制器 Uvrsl AC/DC & Iso DC/DC Flyback ctlr RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX17498AATE+T | 功能描述:电流型 PWM 控制器 Uvrsl AC/DC & Iso DC/DC Flyback ctlr RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
发布紧急采购，3分钟左右您将得到回复。