参数资料
型号: MAX5070AAUA+
厂商: Maxim Integrated Products
文件页数: 12/22页
文件大小: 0K
描述: IC REG CTRLR FLYBK DIV ISO 8UMAX
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: 1MHz
占空比: 97.5%
电源电压: 10.8 V ~ 25 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 125°C
封装/外壳: 8-TSSOP,8-MSOP(0.118",3.00mm 宽)
包装: 管件
产品目录页面: 1411 (CN2011-ZH PDF)
High-Performance, Single-Ended, Current-Mode
PWM Controllers
VP
MAX5071A/MAX5071B
1V
2.5V
REFERENCE
PREREGULATOR
UVLO
16V/10V
VOLTAGE-
DIVIDER
2.5V
5V
2.5V
THERMAL
SHUTDOWN
EN-REF
V DD
7 V CC
26.5V
BG 5V REGULATOR
SNS
8 VREF
EN-DRV-BAR
DELAY
REG_OK
VP
VOLTAGE-
DIVIDER
1V
ILIM
S
Q
6 OUT
CLK
R
CS 3
GND 5
CPWM
OSC Q
COMP 1
2R
100% MAX DUTY CYCLE (MAX5071A)
50% MAX DUTY CYCLE (MAX5071B)
4 R T /C T
R
SYNC 2
BIDIRECTIONAL
SYNC
Figure 2. MAX5071A/MAX5071B Functional Diagram
Current-Mode Control Loop
The advantages of current-mode control over voltage-
mode control are twofold. First, there is the feed-forward
characteristic brought on by the controller’s ability to
adjust for variations in the input voltage on a cycle-by-
cycle basis. Secondly, the stability requirements of the
current-mode controller are reduced to that of a single-
pole system unlike the double pole in the voltage-mode
control scheme.
The MAX5070/MAX5071 use a current-mode control loop
where the output of the error amplifier is compared to the
current-sense voltage (V CS ). When the current-sense sig-
nal is lower than the noninverting input of the PWM com-
parator, the output of the CPWM comparator is low and
the switch is turned on at each clock pulse. When the
current-sense signal is higher than the inverting input of
the CPWM, the output of the CPWM comparator is high
and the switch is turned off.
12
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MAX5070AAUA+ 功能描述:电流型 PWM 控制器 Single-Ended 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
MAX5070AAUA+T 功能描述:电流型 PWM 控制器 Single-Ended 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
MAX5070AAUA-T 功能描述:电流型 PWM 控制器 Single-Ended 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
MAX5070BAPA+ 制造商:Maxim Integrated Products 功能描述:HIGH-PERFORMANCE, SINGLE-ENDED, CURRENT-MODE PWM CONTROLLERS - Rail/Tube
MAX5070BASA 功能描述:电流型 PWM 控制器 Single-Ended 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