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参数资料
| 型号： | MAX5053BEUA+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/13页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST ISO PWM 8-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： | 290kHz |
| 占空比： | 76% |
| 电源电压： | 10.8 V ~ 24 V |
| 降压： | 无 |
| 升压： | 是 |
| 回扫： | 无 |
| 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： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 包装： | 管件 |
Current-Mode PWM Controllers with an Error
Amplifier for Isolated/Nonisolated Power Supplies
Typical Operating Characteristics (continued)
(UVLO = +1.4V, V FB = +1V, V COMP = floating, V CS = 0V, T A = +25°C, unless otherwise noted.)
NDRV OUTPUT IMPEDANCE
ERROR AMP OPEN-LOOP GAIN
5.0
4.8
4.6
4.4
4.2
4.0
3.8
3.6
3.4
3.2
3.0
vs. TEMPERATURE
V IN = 24V
SOURCING 20mA
120
100
80
60
40
20
0
-20
-40
-60
-80
-100
AND PHASE vs. FREQUENCY
MAX5052 toc20
GAIN
PHASE
50
30
10
-10
-30
-50
-70
-90
-110
-130
-150
-170
-40
-20
0
20
40
60
80
0.1
1
10
100
1k
10k 100k 1M 10M 100M
TEMPERATURE ( ° C)
FREQUENCY (Hz)
Pin Description
PIN
1
2
3
4
5
6
7
8
NAME
UVLO/EN
FB
COMP
CS
GND
NDRV
V CC
V IN
FUNCTION
Externally Programmable Undervoltage Lockout. UVLO programs the input start voltage. Connect UVLO to
GND to disable the device.
Error-Amplifier Inverting Input
Error-Amplifier Output
Current-Sense Connection for PWM Regulation and Overcurrent Protection. Connect to high side of sense
resistor. An RC filter may be necessary to eliminate leading-edge spikes.
Power-Supply Ground
External N-Channel MOSFET Gate Connection
Gate-Drive Supply. Internally regulated down from V IN . Decouple with a 10nF or larger capacitor to GND.
IC Supply. Decouple with a 10nF or larger capacitor to GND. For bootstrapped operation (MAX5052)
connect a startup resistor from the input supply line to V IN . Connect the bias winding supply to this point as
well (see the Typical Operating Circuit ). For the MAX5053, connect V IN directly to 10.8V to 24V supply.
Detailed Description
The MAX5052/MAX5053 are current-mode PWM con-
trollers that have been specifically designed for use in
isolated and nonisolated power-supply applications. A
bootstrap UVLO with a large hysteresis (11.9V), very
low startup current, and low operating current result in
efficient universal-input power supplies. In addition to
the internal bootstrap UVLO, these devices also offer
programmable input startup voltage programmed
through the UVLO/EN pin. This feature is useful in pre-
venting the power supply from entering a brownout
condition, in case the input voltage drops below its
minimum value. This is important since switching power
supplies increases their input supply current as the
input voltage drops in order to keep the output power
constant. The MAX5052 is well suited for universal input
(rectified 85VAC to 265VAC) or telecom (-36VDC to
-72VDC) power supplies. The MAX5053 is well suited for
low-input-voltage (10.8VDC to 24VDC) power supplies.
Power supplies designed with the MAX5052 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
45μA of quiescent current. This low startup current and
the large bootstrap UVLO hysteresis helps to minimize
6
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5053BEUA+ | 功能描述:电流型 PWM 控制器 w/Error Amplifier 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 |
| MAX5053BEUA+T | 功能描述:电流型 PWM 控制器 w/Error Amplifier 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 |
| MAX5053BEUA-T | 功能描述:电流型 PWM 控制器 w/Error Amplifier 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 |
| MAX5054 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:4A, 20ns, Dual MOSFET Drivers |
| MAX5054_10 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:4A, 20ns, Dual MOSFET Drivers |
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