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参数资料
| 型号： | MAX15001BEUB+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/18页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR PWM CM 10-UMAX |
| 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 |
| 频率 - 最大： | 2.5MHz |
| 占空比： | 75% |
| 电源电压： | 9.5 V ~ 24 V |
| 降压： | 无 |
| 升压： | 是 |
| 回扫： | 是 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 包装： | 管件 |
Current-Mode PWM Controllers with
Programmable Switching Frequency
Detailed Description
The MAX15000/MAX15001 current-mode PWM con-
trollers are ideal for isolated and nonisolated power-
supply applications. The devices offer an accurate
input startup voltage programmable through the
UVLO/EN input. This feature prevents the power supply
from entering a brownout condition in case the input
voltage sags below its minimum value. This is important
since switching power supplies increases their input
supply current as the input voltage drops to keep the
output power constant. In addition to this externally
adjustable UVLO feature, the MAX15000 also offers a
bootstrap UVLO with a large hysteresis (11.9V) and
very low startup and operating current, which result in
an efficient universal input power supply. The switching
frequency of the MAX15000/MAX15001 is programma-
ble with an external resistor.
The MAX15000 is well suited for universal input (recti-
fied 85VAC to 265VAC) or telecom (-36VDC to
-72VDC) power supplies. The MAX15001 is well suited
for low-input voltage (9.5VDC to 24VDC) power sup-
plies. The devices include an internal clamp at IN to
prevent the input voltage from exceeding the absolute
maximum rating (see Note 2 at the end of the Electrical
Characteristics table). The input is clamped when the
devices are started with a bleed resistor (R1 in Figure 1)
from a high input voltage and the UVLO/EN input is low.
The clamp can safely sink up to 2mA current.
Power supplies designed with the MAX15000 use a
high-value startup resistor R1 that charges a reservoir
capacitor C1 (see Figure 1). During this initial period,
while the voltage is less than the internal bootstrap
UVLO threshold, the device typically consumes only
50μA of quiescent current. This low startup current and
the large bootstrap UVLO hysteresis help to minimize
the power dissipation across R1 even at the high end of
the universal AC input voltage (265VAC).
The MAX15000/MAX15001 include a cycle-by-cycle
current limit that turns off the gate drive to the external
MOSFET whenever the internally set threshold of 1V is
exceeded. When using the MAX15000 in the boot-
strapped mode, if the power-supply output is shorted,
the tertiary winding voltage will drop below the internal-
ly set threshold causing the UVLO to turn off the gate
drive to the external power MOSFET. This will reinitiate
a startup sequence with soft-start.
D2
T1
D1
V SUPPLY
R2
R1
V OUT
UVLO/EN
1
10
IN
R13
C2
UFLG
FB
2
3
MAX15000
9
8
V CC
NDRV
Q1
C4
C5
COMP
4
7
GND
R3
R11
CS
5
6
RT
R14
C6
C2
R12
R15
0V
Figure 1. Nonisolated Power Supply with Programmable Input-Supply Start Voltage
C1
R4
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX15001BEUB+ | 功能描述:电流型 PWM 控制器 w/Programmable Switching 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 |
| MAX15001BEUB+T | 功能描述:电流型 PWM 控制器 w/Programmable Switching 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 |
| MAX15002ATL+ | 功能描述:DC/DC 开关控制器 Dual-Out Buck Ctlr w/Track/Sequence 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 |
| MAX15002ATL+T | 功能描述:DC/DC 开关控制器 Dual-Out Buck Ctlr w/Track/Sequence 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 |
| MAX15003ATM+ | 功能描述:DC/DC 开关控制器 Triple-Out Buck Ctlr w/Track/Sequence 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 |
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