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参数资料
| 型号： | MAX5069AEVKIT |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/19页 |
| 文件大小： | 0K |
| 描述： | EVAL KIT FOR MAX5069A |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，隔离 |
| 输出电压： | 12V |
| 电流 - 输出： | 10A |
| 输入电压： | 36 ~ 72V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 500kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | MAX5069A |
High-Frequency, Current-Mode PWM Controller
with Accurate Oscillator and Dual FET Drivers
D3
D1
V OUT
C7
V IN
R2
C1
R1
R6
C2
FLTINT
IN
UVLO/EN
R HYST
D2
C3
V CC
HYST
C4
MAX5069B
R7
R9
REG5
R3
R4
RT
NDRVB
NDRVA
Q1
Q2
R10
DT
C5
CS
SCOMP
FB
R8
AGND PGND COMP
R5
C6
Figure 1. Nonisolated Power Supply with Programmable Input Supply Voltage
Undervoltage Lockout
Calculate R6 in Figure 2 by using the following formula:
R 6 = ?
? 1 ? × R 7
The MAX5069 features an input voltage UVLO/EN func-
tion to enable the PWM controller before any operation
can begin. The MAX5069A/D shut down if the voltage
at UVLO/EN falls below its 1.18V threshold. The
? V ON
? V ULR 2
?
?
MAX5069B/C also incorporate a UVLO hysteresis input
to set the desired turn-off voltage.
MAX5069A/D UVLO Adjustment
The MAX5069A/D have an input voltage UVLO/EN with
a 1.231V threshold. Before any operation can com-
mence, the UVLO/EN voltage must exceed the 1.231V
threshold. The UVLO circuit keeps the PWM compara-
tor, ILIM comparator, oscillator, and output drivers shut-
down to reduce current consumption (see the
Functional Diagram) .
where V ULR2 is the UVLO/EN’s 1.231V rising threshold
and V ON is the desired startup voltage. Choose an R7
value in the 20k ? range.
After a successful startup, the MAX5069A/D shut down
if the voltage at UVLO/EN drops below its 1.18V fall-
ing threshold.
MAX5069B/C UVLO with
Programmable Hysteresis
In addition to programmable undervoltage lockout dur-
ing startup, the MAX5069B/C incorporate a UVLO/EN
10
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5069B | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:High-Frequency, Current-Mode PWM Controller with Accurate Oscillator and Dual FET Drivers |
| MAX5069BAUE | 功能描述:电流型 PWM 控制器 High-Frequency Current-Mode PWM 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 |
| MAX5069BAUE+ | 功能描述:电流型 PWM 控制器 High-Frequency Current-Mode PWM 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 |
| MAX5069BAUE+T | 功能描述:电流型 PWM 控制器 High-Frequency Current-Mode PWM 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 |
| MAX5069BAUE-T | 功能描述:电流型 PWM 控制器 High-Frequency Current-Mode PWM 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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