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參數(shù)資料
| 型號： | MIC9130YQSTR |
| 廠商： | MICREL INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 2500 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | LEAD FREE, QSOP-16 |
| 文件頁數(shù)： | 19/19頁 |
| 文件大?。?/td> | 251K |
| 代理商： | MIC9130YQSTR |
November 2008
9
M9999-111108
MIC9130
Micrel, Inc.
Functional Description
Micrel’s MIC9130 is a high voltage, high speed current mode
switching power supply controller. It uses a BiC/DMOS pro-
cess to achieve a high voltage input, low quiescent current
and very fast internal delay times. The MIC9130 is designed
to drive an external low side N-channel MOSFET, which
makes it suitable for controlling Boost, Flyback and Forward
converter topologies. The high voltage startup pin eliminates
the requirement for an external start up circuit. This makes
it ideal for use with Telecom converters.
A block diagram of the MIC9130 is shown in Figure 1. The de-
scription of the controller is divided into 6 basic functions:
Power and bias circuitry
High voltage start-up circuit
VCC and bias supplies
Enable and undervoltage monitoring circuits
VCC and VIN UVLO
Enable
Oscillator and sync circuitry
Soft-start and soft-start reset circuits
MOSFET gate drive circuits
Control loop operation
Current sensing & overcurrent protection
Slope compensation
Error amplier
High Voltage Start Up Circuit
Many conventional Off-Line and Telecom power supplies
use an external bias resistor and zener diode to supply the
initial start-up voltage for the control IC. The control IC gets
its supply voltage from a bias winding once the power sup-
ply is running. This method has the disadvantages of extra
components (diode and power resistor), continuous power
dissipation in the resistor and a large bias capacitor, used to
supply the IC until the bias winding takes over.
The MIC9130 eliminates these problems by using an internal
depletion mode MOSFET as a pre-regulator to provide the
start-up bias voltage from the high voltage input of the power
supply. This approach eliminates the need for external start
up components and reduces the size of the controller’s bias
supply capacitor. The MOSFET is turned off once the external
bias winding takes over, which eliminates power dissipation
in the start-up circuit. In some cases, the MIC9130 may be
run directly from the input voltage rail, eliminating the need
for an external bias winding.
Transformer
Bias
Winding
VIN
180V
DEPLETION
FET
Internal
Circuitry
MIC9130
VCC
2
Line
1
THERMAL
SHUTDOWN
1.21V
VCC
UVLO
VPR
VPR(OFF) Depletion FET Pre-Regultor turn-off threshold
Depletion FET turn-on threshold
VGLO VCC Gate Lockout Hysteresis
VCC voltage when powered from VLINE
VGLO(ON) VCC gate lockout turn on threshold
Figure 2
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| MICD-095-06.00-STR-TBL | INTERCONNECTION DEVICE |
| MICD-095-06.00-TBL-STR | INTERCONNECTION DEVICE |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC9131 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:High-Voltage, High-Speed Telecom |
| MIC9131_06 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:High-Voltage, High-Speed Telecom |
| MIC9131BM | 功能描述:IC CTRLR DC-DC PWM HV HS 16-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR) |
| MIC9131BM TR | 功能描述:IC CTRLR DC-DC PWM HV HS 16-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR) |
| MIC9131BQS | 功能描述:IC CTRLR DC-DC PWM HV HS 16-QSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR) |
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