- 您现在的位置：买卖IC网 > PDF目录1847 > MAX8540EEE+T (Maxim Integrated Products)IC REG CTRLR PWM CM 16-QSOP PDF资料下载
参数资料
| 型号： | MAX8540EEE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/16页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR PWM CM 16-QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 1MHz |
| 占空比： | 82% |
| 电源电压： | 7.6 V ~ 18 V |
| 降压： | 无 |
| 升压： | 无 |
| 回扫： | 是 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 是 |
| Cuk： | 无 |
| 隔离： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
Synchronizable, High-Frequency Current- and
Voltage-Mode PWM Controllers for Isolated Supplies
Pin Description
PIN
MAX8540 MAX8541
NAME
FUNCTION
1
1
REF
5V Reference Voltage Output. Bypass to ground with a 1μF capacitor. REF is pulled to GND
during shutdown.
System Input Overvoltage Monitoring. The OV threshold is 3.021V with 130mV hysteresis.
2
2
OV
Connect to the center of a resistor-divider from the system input to GND to set the overvoltage
trip point (see the Overvoltage Threshold section).
System Input Undervoltage Monitoring and Feed-Forward Input. The UV threshold is 1.25V with
3
3
UV
120mV hysteresis. Connect to the center of a resistor-divider from the system input to GND to
set the undervoltage trip point (see the Undervoltage Threshold section). This input can be used
as a disable input by pulling it below 1.2V. UV remains active during shutdown.
4
5
4
5
FREQ/
SYNC
SS
Programmable Frequency and Sync Input. Connect a resistor in parallel with RC (10k ? , 0.01μF) from
FREQ/SYNC to GND to set the switching frequency or apply an external clock signal through a diode
to synchronize to an external frequency.
Soft-Start Capacitor Connection. Connect a capacitor from SS to GND to set the soft-start time period.
Programmable Maximum Duty-Cycle Input. Connect a resistor from MAXDTY to GND to set the
maximum duty cycle for minimum system input voltages. The maximum duty cycle is inversely
6
6
MAXDTY proportional to the system input voltage. The higher the input voltage, the less the maximum
duty cycle. The maximum duty cycle is internally limited to 80% at any switching frequency.
MAXDTY is high impedance during shutdown. Bypass MAXDTY with a 2200pF capacitor.
7
8
—
9
10
11
12
13
14
7
—
8
9
10
11
12
13
14
EN
SCOMP
PRAMP
OPTO
ILIM
SKTOFF
CS
SKTON
GND
Active-Low Enable Input. Drive EN to GND to enable the IC. Drive high to place the IC in
shutdown mode.
Programmable Slope Compensation Input. Connect a resistor from SCOMP to GND to set the
slope compensation.
Programmable Voltage-Mode Control-Ramp Input. Connect a resistor from PRAMP to GND to
set the magnitude of the voltage ramp.
Isolated Feedback Input. Connect to an optocoupler for an isolated power converter or connect to the
output of a voltage-error amplifier for a nonisolated power converter for a feedback-error signal.
Current-Limit Threshold Input. Connect to the center of a resistor-divider from REF to GND to set
the current-limit threshold voltage.
Current-Limit Off-Time Input. Connect a capacitor from SKTOFF to GND to set the current-limit off-time.
Pull SKTOFF to REF through a 10k ? resistor to latch off the IC after an overcurrent event.
Current-Sense Input. Provides current-sense feedback for cycle-by-cycle current limit and is
also the current-mode input for the MAX8540. Connect a current-sense resistor from CS to GND.
Current-Limit On-Time Input. Connect a capacitor to ground to set the current-limit on-time.
Ground
Gate Drive for External N-Channel Power MOSFET. Connect to the gate of an external MOSFET
15
15
DRV
for low-power applications. Connect to the input of an external gate driver for high-power
applications.
16
16
V CC
Voltage Supply for the IC. Operating input voltage range is 7.6V to 18V. Bypass V CC with a
ceramic capacitor to GND.
8
_______________________________________________________________________________________
相关PDF资料 |
PDF描述 |
|---|---|
| MAX8545EUB+T | IC REG CTRLR BUCK PWM VM 10-UMAX |
| MAX8550AETI+T | IC PWR SUP DDR INTEG 28TQFN |
| MAX8550ETI+ | IC PWR SUP DDR INTEG 28TQFN |
| MAX8553EEE+T | IC CNTRLR BUCK PWM 16-QSOP |
| MAX8555EUB+ | IC CNTRLR MOSFET ORING 10-UMAX |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8541EEE | 功能描述:电压模式 PWM 控制器 RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX8541EEE+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX8541EEE-T | 功能描述:电压模式 PWM 控制器 RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX8543EEE | 功能描述:DC/DC 开关控制器 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 |
| MAX8543EEE+ | 功能描述:电流型 PWM 控制器 Step-Down Controller 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 |
发布紧急采购，3分钟左右您将得到回复。