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參數(shù)資料
| 型號： | MIC5010BM |
| 廠商： | MICREL INC |
| 元件分類： | 功率晶體管 |
| 英文描述： | Full-Featured High- or Low-Side MOSFET Driver |
| 中文描述： | BUF OR INV BASED MOSFET DRIVER, PDSO14 |
| 封裝： | 0.150 INCH, SOIC-14 |
| 文件頁數(shù)： | 7/16頁 |
| 文件大?。?/td> | 189K |
| 代理商： | MIC5010BM |
April 1998
5-93
MIC5010
Applications Information
Micrel
5
Functional Description
(Refer to
Block Diagram
)
The various MIC5010 functions are controlled via a logic
block connected to the input pin 3. When the input is low all
functions are turned off for low standby current, and the gate
of the power MOSFET is also held low through 500
to an
N-channel switch. When the input is taken above the turn-
on threshold (3.5V typical), the N-channel switch turns off
and the charge pump is turned on to charge the gate of the
power FET. A bandgap type voltage regulator is also turned
on which biases the current sense circuitry.
The charge pump incorporates a 100kHz oscillator and on-
chip pump capacitors capable of charging 1 nF to 5V above
supply in 60
μ
S typical. With the addition of 1nF capacitors
at C1 and C2, the turn-on time is reduced to 25
μ
S typical.
The charge pump is capable of pumping thegate up to over
twice the supply voltage. For this reason a zener clamp
(12.5V typical) is provided between the gate pin 8 and the
source pin 6 to prevent exceeding the V
GS
rating of the
MOSFET at high supplies.
The current sense operates by comparing the sense volt-
age at pin 5 to an offset version of the source voltage at pin
6. Current I4 flowing in threshold pin 4 is mirrored and
returned to the source via a 1k
resistor to set the offset or
trip voltage. When (V
SENSE
– V
SOURCE
) exceeds V
TRIP
, the
current sense trips and sets the current sense latch to turn
off the power FET. An integrating comparator is used to
reduce sensitivity to spikes on pin 5. The latch is reset to turn
the FET back on by “recycling” the input pin 3 low and then
high again.
A resistor R
TH
from pin 4 to ground sets I4, and hence V
TRIP
.
An additional capacitor C
TH
from pin 4 to ground creates a
higher trip voltage at turn-on, which is necessary to prevent
high in-rush current loads such as lamps or capacitors from
false-tripping the current sense.
When the current sense has tripped, the fault pin 14 will be
high as long as the input pin 3 remains high. However, when
the input is low the fault pin will also be low.
Construction Hints
High current pulse circuits demand equipment and assem-
bly techniques that are more stringent than normal, low
current lab practices. The following are the sources of
common pitfalls encountered while prototyping:Supplies:
many bench power supplies have poor transient response.
Circuits that are being pulse tested, or those that operate by
pulse-width modulation will produce strange results when
used with a supply that has poor ripple rejection, or a
peaked transient response. Monitor the power supply volt-
age that appears at the drain of a high-side driver (or the
supply side of the load in a low-side driver) with an oscillo-
scope. It is not uncommon to find bench power supplies in
the 1kW class that overshoot or undershoot by as much as
50% when pulse loaded. Not only will the load current and
voltage measurements be affected, but it is possible to
over-stress various components—especially electrolytic
capacitors—with possibly catastrophic results. A 10
μ
F sup-
ply bypass capacitor at the chip is recommended.
+
-
V+
CHARGE
PUMP
TEMP
SENSE
V. REG
R
S
Q
LOGIC
MIC5010
3
14
7
1
4
6
5
8
9
10
11
13
500
1k
C1 Com C2
V+
Gate
Sense
Source
Ground
Inhibit
Threshold
Input
Fault
1k
+
-
I4
CURRENT
SENSE
LATCH
V
TRIP
12.5V
Block Diagram
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MIC5010BN | Full-Featured High- or Low-Side MOSFET Driver |
| MIC5013 | Protected High- or Low-Side MOSFET Driver(帶過流保護(hù)的高/低邊MOS場效應(yīng)管驅(qū)動器) |
| MIC5013BM | FPGA 1000000 SYSTEM GATE 1.8 VOLT - NOT RECOMMENDED for NEW DESIGN |
| MIC5013BN | FPGA 1000000 SYSTEM GATE 1.8 VOLT - NOT RECOMMENDED for NEW DESIGN |
| MIC5020 | Replaced by PTN78060W : |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC5010BN | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Full-Featured High- or Low-Side MOSFET Driver |
| MIC5011 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Minimum Parts High- or Low-Side MOSFET Driver |
| MIC5011_05 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Minimum Parts High- or Low-Side MOSFET Driver |
| MIC5011BM | 功能描述:IC DRIVER MIN PARTS HI/LO 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - MOSFET，電橋驅(qū)動器 - 外部開關(guān) 系列:- 標(biāo)準(zhǔn)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(dǎo)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(yīng)商設(shè)備封裝:8-DIP 包裝:管件 其它名稱:*IR2127 |
| MIC5011BM TR | 功能描述:IC DRIVER MOSF HI/LOW SIDE 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - MOSFET，電橋驅(qū)動器 - 外部開關(guān) 系列:- 標(biāo)準(zhǔn)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(dǎo)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(yīng)商設(shè)備封裝:8-DIP 包裝:管件 其它名稱:*IR2127 |
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