参数资料
| 型号： | MIC2183BQS TR |
| 厂商： | Micrel Inc |
| 文件页数： | 8/12页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 16-QSOP |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 440kHz |
| 占空比： | 100% |
| 电源电压： | 2.9 V ~ 14 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 ~ 125°C |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 其它名称： | MIC2183BQSTR MIC2183BQSTR-ND |
MIC2183
Functional Diagram
C DECOUP
C IN
V IN
Micrel, Inc.
VINA
1
OVERCURRENT
VREF
COMPARATOR
1.245V
0.1V
9
CSH
EN/UVLO
7
R SENSE
VDD
10
VDD
BIAS
GAIN
3.7
8
CSL
ON
CURRENT
SENSE
AMP
16
VINP
fs/4
CONTROL
14
OUTP
Q1
SYNC
11
PGND
L1
V OUT
FREQ/2
FreqOut
15
2
÷ 2
OSC
RESET
SLOPE
COMPENSATION
∑
13
12
OUTN
PGND
Q2
D1
C OUT
PWM
COMPARATOR
SS
COMP
3
4
gm = 0.0002 V REF
gain = 20
ERROR
fs/4
100k
FREQUENCY
AMP
0.3V
6
5
FB
SGND
FOLDBACK
Figure 1. MIC2183 Block Diagram
Functional Characteristics
Controller Overview and Functional Description
The MIC2183 is a BiCMOS, switched mode, synchronous,
step down (buck) converter controller. It uses both N and P-
Channel MOSFETs, which allows the controller to operate at
100% duty cycle and eliminates the need for a high side drive
bootstrap circuit. 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 is a block diagram of the MIC2183 configured as a
synchronous buck converter. At the beginning of the switch-
ing cycle, the OUTP pin pulls low and turns on the high-side
P-Channel MOSFET, Q1. Current flows from the input to the
output through the current sense resistor, MOSFET and
inductor. The current amplitude increases, controlled by the
inductor. The voltage developed across the current sense
resistor, R SENSE , is amplified inside the MIC2183 and com-
bined with an internal ramp for stability. This signal is com-
pared to the output of the error amplifier. When the current
signal equals the error voltage signal, the P-channel MOSFET
is turned off. The inductor current flows through the diode, D1,
until the synchronous, N-Channel MOSFET turns on. The
voltage drop across the MOSFET is less than the forward
voltage drop of the diode, which improves the converter
efficiency. At the end of the switching period, the synchro-
nous MOSFET is turned off and the switching cycle repeats.
M9999-042205
8
April 2005
相关PDF资料 |
PDF描述 |
|---|---|
| MIC2184YQS | IC REG CTRLR BUCK PWM CM 16-QSOP |
| MIC2185YQS | IC REG CTRLR BST PWM CM 16-QSOP |
| MIC2186BQS TR | IC REG CTRLR BST FLYBK CM 16QSOP |
| MIC2193BM TR | IC REG CTRLR BUCK PWM CM 8-SOIC |
| MIC2194YM | IC REG CTRLR BST PWM CM 8-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC2183YM | 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 |
| MIC2183YM 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 |
| MIC2183YQS | 功能描述:DC/DC 开关控制器 QSOP-16 Low Vin Synchronous Buck PWM 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 |
| MIC2183YQS TR | 功能描述:DC/DC 开关控制器 QSOP-16 Low Vin Synchronous Buck PWM 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 |
| MIC2184 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Low Voltage Buck PWM Control IC Final Information |
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