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參數(shù)資料
| 型號： | MIC2196 |
| 廠商： | Micrel Semiconductor,Inc. |
| 英文描述： | 400kHz SO-8 Boost Control IC |
| 中文描述： | 400kHz的SO - 8封裝升壓控制IC |
| 文件頁數(shù)： | 6/11頁 |
| 文件大小： | 68K |
| 代理商： | MIC2196 |
MIC2196
Functional Diagram
Micrel
MIC2196
6
August 2004
Functional Description
The MIC2196 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 MIC2196 configured
as a PWM boost converter.
Osc
Error
Amplifier
0.11V
D1
L1
C
IN
fs/4
V
IN
Control
Bias
PWM
Comparator
V
REF
V
DD
GND
Overcurrent
Comparator
Frequency
Foldback
fs/4
R
Overcurrent Reset
CRamp
On
Gain = 3.7
CS
4
OUTN
7
V
IN
8
V
fb
2
6
GND
V
DD
5
COMP
2
EN/UVLO
3
gGain = 20
0.3V
100k
R2
R1
R
SENSE
C
OUT
V
OUT
V
REF
C
DECOUP
V
DD
Figure 1. MIC2196 Block Diagram
The switching cycle starts when OUTN goes high and turns
on the low-side, N-channel MOSFET, Q1. The V
GS
of the
MOSFET is equal to V
IN
. This forces current to ramp up in the
inductor. The inductor current flows through the current
sense resistor, R
SENSE
. 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.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC2196_08 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:400kHz SO-8 Boost Control IC |
| MIC2196BM | 功能描述:IC REG CTRLR BST FLYBK PWM 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR) |
| MIC2196BM TR | 功能描述:IC REG CTRLR BST FLYBK PWM 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR) |
| MIC2196YM | 功能描述:DC/DC 開關(guān)控制器 SO-8 3V Boost Controller (Lead Free) RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| MIC2196YM LED EV | 功能描述:電源管理IC開發(fā)工具 SO-8 3V Boost Contoller (Lead Free) - Evaluation Board RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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