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参数资料
| 型号： | MIC2124YMM |
| 厂商： | Micrel Inc |
| 文件页数： | 11/24页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 10-MSOP |
| 产品培训模块： | MIC2124 Synchronous Current Mode DC-DC Buck Controller |
| 标准包装： | 100 |
| 系列： | Hyper Speed Control™ |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 360kHz |
| 占空比： | 93% |
| 电源电压： | 3 V ~ 5.5 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 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 |
| 其它名称： | 576-3639-5 MIC2124YMM-ND |
Micrel, Inc.
MOSFET Gate Drive
The MIC2124 high-side drive circuit is designed to
switch an N-Channel MOSFET. The typical application
circuit shows a bootstrap circuit, consisting of a Schottky
diode D1 and 0.1 μ F boostrap capacitor C BST , as shown
in the typical application schematic on Page 1. This
circuit supplies energy to the high-side drive circuit.
Capacitor C BST is charged while the low-side MOSFET is
on and the voltage on the LX pin is approximately 0V.
When the high-side MOSFET driver is turned on, energy
from C BST is used to turn the MOSFET on. As the high-
side MOSFET turns on, the voltage on the LX pin
increases to approximately V HSD . Diode D1 is reversed
biased and C BST floats high while continuing to keep the
high-side MOSFET on. The bias current of the high-side
driver is less than 10mA so a 0.1 μ F to 1 μ F is sufficient to
MIC2124
hold the gate voltage with minimal droop for the power
stroke (high-side switching) cycle, i.e., Δ BST = 10mA x
3.33 μ s/0.1 μ F = 333mV. When the low-side MOSFET is
turned back on, C BST is recharged through D1. A small
resistor R G , which is in series with C BST , can be used to
slow down the turn-on time of the high-side N-Channel
MOSFET.
The drive voltage is derived from the supply voltage V IN .
The nominal low-side gate drive voltage is V IN and the
nominal high-side gate drive voltage is approximately
V IN - V DIODE , where V DIODE is the voltage drop across D1.
A dead-time of approximate 30ns between the high-side
and low-side driver transitions is used to prevent current
from simultaneously flowing unimpeded through both
MOSFETs.
June 2010
11
M9999-060810-D
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相关代理商/技术参数 |
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| MIC2124YMM TR | 功能描述:DC/DC 开关控制器 Synch Buck Controller with Adaptive On-Time Control 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 |
| MIC2130 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:High Voltage Synchronous Buck Control IC with Low EMI Option |
| MIC2130-1YML | 制造商:Rochester Electronics LLC 功能描述: 制造商:RF Micro Devices Inc 功能描述: |
| MIC2130-1YML TR | 功能描述:DC/DC 开关控制器 High Voltage Synchronous Buck Control IC 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 |
| MIC2130-1YML-TR | 功能描述:Buck Regulator Positive Output Step-Down DC-DC Controller IC 16-MLF? (4x4) 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:停产 输出类型:晶体管驱动器 功能:降压 输出配置:正 拓扑:降压 输出数:1 输出阶段:1 电压 - 电源（Vcc/Vdd）:8 V ~ 40 V 频率 - 开关:150kHz 占空比（最大）:0.92 同步整流器:是 时钟同步:无 串行接口:- 控制特性:限流，使能，电源良好，软启动 工作温度:-40°C ~ 125°C （TJ） 封装/外壳:16-VQFN 裸露焊盘，16-MLF? 供应商器件封装:16-MLF?（4x4） 标准包装:1 |
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