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| 型号： | MIC2186YM |
| 厂商： | Micrel Inc |
| 文件页数： | 7/15页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST FLYBK CM 16SOIC |
| 标准包装： | 48 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 440kHz |
| 占空比： | 85% |
| 电源电压： | 2.9 V ~ 14 V |
| 降压： | 无 |
| 升压： | 是 |
| 回扫： | 是 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 包装： | 管件 |
| 产品目录页面： | 1092 (CN2011-ZH PDF) |
| 其它名称： | 576-1715-5 MIC2186YM-ND |
MIC2186
Functional Diagram
V IN
C DECOUP
V IN A 1
C IN
V IN P
L1
Micrel, Inc.
V REF
16
EN/UVLO
7
Bias
On
V DD
D1
V OUT
SKIP
2
fs/4
Control
OutN
C OUT
Freq/2
15
Overcurrent Reset
P GND
14
Sync
11
Osc
V DD
HiDC
13
PWM
Comparator
0.1V
Corrective
Ramp
Overcurrent
Soft Start
3
Error
Amplifier
Gain = 3.7
Comparator
CSH
9
R SENSE
COMP
gm = 0.0002
V REF
P GND
P GND
12
4
100k
Gain = 20
0.3V
fs/4
R1
V REF
8
V DD
10
V REF
V DD
Frequency
Foldback
V fb
6
R2
S GND
S GND 5
Figure 1. MIC2186 PWM Block Diagram
Functional Description
The MIC2186 is a BiCMOS, switched mode multi-topology
controller. It will operate most low side drive topologies
including boost, SEPIC, flyback and forward. The controller
has a low impedance driver capable of switching large N-
channel MOSFETs. It features multiple frequency and duty
cycle settings. Current mode control is used to achieve
superior transient line and load regulation. An internal correc-
tive ramp provides slope compensation for stable operation
above a 50% duty cycle. The controller is optimized for high
efficiency, high performance DC-DC converter applications.
Figure 1 shows a block diagram of the MIC2186 configured
as a PWM boost converter.
The switching cycle starts when OutN goes high and turns on
the low side, N-channel MOSFET, Q1. The Vgs of the
MOSFET is equal to V IN P. This forces current to ramp up in
the inductor. The inductor current flows through the current
sense resistor, Rsense. The voltage across the resistor is
amplified and combined with an internal ramp for stability.
This signal is compared with the error voltage signal from the
error amplifier. When the current signal equals the error
voltage signal, the low side MOSFET is turned off. The
inductor current then flows through the diode, D1, to the
output. The MOSFET remains off until the beginning of the
next switching cycle.
April 2005
7
M9999-042205
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC2186YM TR | 功能描述:DC/DC 开关控制器 SO-16 Low Vin Synchronous Buck PWM Control IC (Lead Free) 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 |
| MIC2186YQS | 功能描述:DC/DC 开关控制器 SO-16 Low Vin Synchronous Buck PWM Control IC (Lead Free) 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 |
| MIC2186YQS TR | 功能描述:DC/DC 开关控制器 SO-16 Low Vin Synchronous Buck PWM Control IC (Lead Free) 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 |
| MIC2193 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:400KHZ SO 8 SYNCHRONOUS BUCK CONTROL IC |
| MIC2193BM | 功能描述:IC REG CTRLR BUCK PWM CM 8-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,000 系列:- PWM 型:电压模式 输出数:1 频率 - 最大:1.5MHz 占空比:66.7% 电源电压:4.75 V ~ 5.25 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:40-VFQFN 裸露焊盘 包装:带卷 (TR) |
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