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參數(shù)資料
| 型號： | MIC4428BM |
| 廠商： | MICREL INC |
| 元件分類： | 功率晶體管 |
| 英文描述： | Dual 1.5A-Peak Low-Side MOSFET Driver |
| 中文描述： | 1.5 A 2 CHANNEL, BUF OR INV BASED MOSFET DRIVER, PDSO8 |
| 封裝： | SOIC-8 |
| 文件頁數(shù)： | 6/8頁 |
| 文件大小： | 99K |
| 代理商： | MIC4428BM |
MIC4426/4427/4428
Applications Information
Supply Bypassing
Large currents are required to charge and discharge large
capacitive loads quickly. For example, changing a 1000pF
load by 16V in 25ns requires 0.8A from the supply input.
To guarantee low supply impedance over a wide frequency
range, parallel capacitors are recommended for power sup-
ply bypassing. Low-inductance ceramic MLC capacitors with
short lead lengths (< 0.5") should be used. A 1.0
μ
F film
capacitor in parallel with one or two 0.1
μ
F ceramic MLC
capacitors normally provides adequate bypassing.
Grounding
When using the inverting drivers in the MIC4426 or MIC4428,
individual ground returns for the input and output circuits or a
ground plane are recommended for optimum switching speed.
The voltage drop that occurs between the driver’s ground and
the input signal ground, during normal high-current switching,
will behave as negative feedback and degrade switching
speed.
Control Input
Unused driver inputs must be connected to logic high (which
can be V
S
) or ground. For the lowest quiescent current
(< 500
μ
A) , connect unused inputs to ground. A logic-high
signal will cause the driver to draw up to 9mA.
The drivers are designed with 100mV of control input hyster-
esis. This provides clean transitions and minimizes output
stage current spikes when changing states. The control input
voltage threshold is approximately 1.5V. The control input
recognizes 1.5V up to V
S
as a logic high and draws less than
1
μ
A within this range.
The MIC4426/7/8 drives the TL494, SG1526/7, MIC38C42,
TSC170 and similar switch-mode power supply integrated
circuits.
Micrel
MIC4426/4427/4428
6
September 1999
Power Dissipation
Power dissipation should be calculated to make sure that the
driver is not operated beyond its thermal ratings. Quiescent
power dissipation is negligible. A practical value for total
power dissipation is the sum of the dissipation caused by the
load and the transition power dissipation (P
L
+ P
T
).
Load Dissipation
Power dissipation caused by continuous load current (when
driving a resistive load) through the driver’s output resistance
is:
P
L
= I
L2
R
O
For capacitive loads, the dissipation in the driver is:
P
L
= f C
L
V
S2
Transition Dissipation
In applications switching at a high frequency, transition power
dissipation can be significant. This occurs during switching
transitions when the P-channel and N-channel output FETs
are both conducting for the brief moment when one is turning
on and the other is turning off.
P
T
= 2 f V
S
Q
Charge (Q) is read from the following graph:
1
×
10
-8
8
×
10
-9
4
×
10
-9
3
×
10
-9
2
×
10
-9
6
×
10
-9
1
×
10
-9
4
6
8
10
12
14
16
18
SUPPLY VOLTAGE (V)
C
Crossover Energy Loss per Transition
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MIC4428BM TR | 功能描述:IC DRIVER MOSFET 1.5A DUAL 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - MOSFET，電橋驅動器 - 外部開關 系列:- 標準包裝:50 系列:- 配置:高端 輸入類型:非反相 延遲時間:200ns 電流 - 峰:250mA 配置數(shù):1 輸出數(shù):1 高端電壓 - 最大（自引導啟動）:600V 電源電壓:12 V ~ 20 V 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:8-DIP（0.300"，7.62mm） 供應商設備封裝:8-DIP 包裝:管件 其它名稱:*IR2127 |
| MIC4428BMM | 功能描述:IC DRIVER MOSFET 1.5A DUAL 8MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - MOSFET，電橋驅動器 - 外部開關 系列:- 標準包裝:50 系列:- 配置:高端 輸入類型:非反相 延遲時間:200ns 電流 - 峰:250mA 配置數(shù):1 輸出數(shù):1 高端電壓 - 最大（自引導啟動）:600V 電源電壓:12 V ~ 20 V 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:8-DIP（0.300"，7.62mm） 供應商設備封裝:8-DIP 包裝:管件 其它名稱:*IR2127 |
| MIC4428BMM TR | 功能描述:IC DRIVER MOSFET 1.5A DUAL 8MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - MOSFET，電橋驅動器 - 外部開關 系列:- 標準包裝:50 系列:- 配置:高端 輸入類型:非反相 延遲時間:200ns 電流 - 峰:250mA 配置數(shù):1 輸出數(shù):1 高端電壓 - 最大（自引導啟動）:600V 電源電壓:12 V ~ 20 V 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:8-DIP（0.300"，7.62mm） 供應商設備封裝:8-DIP 包裝:管件 其它名稱:*IR2127 |
| MIC4428BMMTR | 制造商:Micrel Inc 功能描述:MOSFET DRVR 0.025V 1.5A 2-OUT Lo Side Inv/Non-Inv 8-Pin MSOP T/R |
| MIC4428BN | 功能描述:IC DRIVER MOSFET 1.5A DUAL 8-DIP RoHS:否 類別:集成電路 (IC) >> PMIC - MOSFET，電橋驅動器 - 外部開關 系列:- 標準包裝:50 系列:- 配置:高端 輸入類型:非反相 延遲時間:200ns 電流 - 峰:250mA 配置數(shù):1 輸出數(shù):1 高端電壓 - 最大（自引導啟動）:600V 電源電壓:12 V ~ 20 V 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:8-DIP（0.300"，7.62mm） 供應商設備封裝:8-DIP 包裝:管件 其它名稱:*IR2127 |
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