参数资料
| 型号： | MAX17497AATE+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 11/30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) |
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MAX17497A/MAX17497B
AC-DC and DC-DC Peak Current-Mode Converters
with Integrated Step-Down Regulator
Pin Description (continued)
PIN
8
9
10
11
12
13
14
15
16
—
NAME
SSF
OUTB
PGNDB
LXB
INB
RESETN
PGNDF
LXF
IN
EP
FUNCTION
Soft-Start Pin for Flyback/Boost Converter. Connect a capacitor from SSF to SGND to set the
soft-start time interval.
Feedback for Step-Down Regulator. Connects OUTB to the positive terminal of the step-down
regulator output capacitor.
Power Ground for Step-Down Regulator
External Inductor Connection for Step-Down Regulator. Connect to one end of the output inductor.
Connect the other end of output inductor to output capacitor.
Internal Step-Down Regulator Input. Connect INB to either V OUTF , the output of flyback/boost
converter, or directly to the DC input source, as needed in the application. Bypass INB to PGNDB
with a 2.2 F F minimum ceramic capacitor.
Open-Drain Output. RESETN goes high when both the outputs are within 5% of their regulation point.
RESETN goes low when either of the outputs falls below 92% of their regulation value.
Power Ground for Flyback/Boost Converter
External Transformer/Inductor Connection for Flyback/Boost Converter
Internal Linear Regulator Input. Connect IN to the input-voltage source. Bypass IN to PGNDF with
ceramic capacitor of at least 1 F F.
Exposed Pad. Internally connected to SGND. Connect EP to a large copper plane at SGND potential
to provide adequate thermal dissipation. Connect EP (SGND) to PGNDF at a single point.
Detailed Description
The MAX17497A is optimized for implementing a noniso-
lated offline flyback converter with output power of up to
30W and a 3.3V, 600mA power rail using the on-board
synchronous step-down regulator. The output voltage of
the flyback converter serves as the input supply voltage
to the on-board 3.3V integrated synchronous step-down
regulator. The outputs of the flyback converter and step-
down regulator are regulated with independent feedback
loops, thus providing two accurately controlled voltages
for the system. If needed, more semi-regulated outputs
can be generated using additional secondary windings
on the flyback converter transformer. The MAX17497B is
optimized for implementing a nonisolated flyback/boost
converter up to 15W and a 3.3V, 600mA synchronous
step-down regulator in low-voltage DC-DC applications
down to 4.5V DC. See the Figure 1 for more information.
Maxim Integrated
Input Voltage Range
The MAX17497A has different rising and falling UVLO
thresholds on the IN pin than those of the MAX17497B.
The thresholds for the MAX17497A are optimized for
implementing power-supply startup schemes typically
used for offline AC-DC power supplies. The MAX17497A
is therefore well suited for operation from the recti-
fied DC bus in AC-DC power-supply applications typi-
cally encountered in electric metering and other low-
power industrial power-supply applications. As such,
the MAX17497A has no limitation on the maximum
input voltage as long as the external components are
rated suitably and the maximum operating voltages of
the MAX17497A are respected. The MAX17497A can
successfully be used in universal input rectified (85V to
265V AC) bus applications, rectified 3-phase DC bus
applications, and telecom (36V to 72V DC) applications.
11
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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 |
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