参数资料
型号: MAX17500AEVKIT+
厂商: Maxim Integrated Products
文件页数: 13/18页
文件大小: 0K
描述: KIT EVALUATION FOR MAX17500
标准包装: 1
主要目的: DC/DC 转换器
输出及类型: 2,隔离
输出电压: 5V,15V
电流 - 输出: 1.5A,100mA
输入电压: ±36 V ~ 72 V
稳压器拓扑结构: 回扫
频率 - 开关: 350kHz
板类型: 完全填充
已供物品:
已用 IC / 零件: MAX17500A
Current-Mode PWM Controllers with
Programmable Switching Frequency
Choose a higher value for R1 than the one calculated in
the previous equation if a longer startup time can be
tolerated to minimize power loss on this resistor.
The above startup method is applicable to a circuit simi-
lar to the one shown in Figure 1. In this circuit, the ter-
tiary winding has the same phase as the output
windings. Thus, the voltage on the tertiary winding at any
given time is proportional to the output voltage and goes
through the same soft-start period as the output voltage.
The minimum discharge time of C1 from 21.6V to 9.74V
must be greater than the soft-start time of 5.6ms.
D1
Another method for bootstrapping the power supply is
to use a bias winding that is in-phase with the MOSFET
on-time (see Figure 5). In this case, the amount of
capacitance required at IN (C1) is much smaller.
However, the input voltage cannot have a range
greater than approximately 2:1 (primary-winding volt-
age to bias-winding voltage ratio).
For hiccup-mode fault protection, make the bias wind-
ing in-phase with the output, then the power-supply hic-
cups and soft-starts under output short-circuit
conditions. The power supply does not hiccup if the
bias winding is in-phase with the MOSFET on-time.
T1
V IN
D2
C4
V OUT
R1
UFLG
R2
R8
R9
IN
U1
NDRV
Q1
U2
OPTO
V CC
MAX17500A
CS
U2
OPTO LED
C3
TRANS
R7
R5
C1
COMP
GND
U3
TL431
FB
RT
UVLO/EN
R4
R10
C6
R6
C2
R12
R15
R3
Figure 5. Secondary-Side Regulated, Isolated Power Supply
______________________________________________________________________________________
13
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相关代理商/技术参数
参数描述
MAX17500AEVKIT+ 功能描述:电流型 PWM 控制器 w/Prog Switch Frequency 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
MAX17500BAUB+ 功能描述:电流型 PWM 控制器 电流型 PWM 控制器 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
MAX17500BAUB+T 功能描述:电流型 PWM 控制器 电流型 PWM 控制器 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
MAX17500BEUB+ 功能描述:电流型 PWM 控制器 w/Prog Switch Frequency 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
MAX17500BEUB+T 功能描述:电流型 PWM 控制器 w/Prog Switch Frequency 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