MIC3201YME-TR [MICROCHIP]
LED DISPLAY DRIVER;
| 型号： | MIC3201YME-TR |
| 厂家： | 
MICROCHIP |
| 描述： | LED DISPLAY DRIVER 驱动 光电二极管 接口集成电路 |
| 文件： | 总16页 (文件大小：638K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MIC3201
High Brightness LED Driver with
High-Side Current Sense
General Description
Features
The MIC3201 is a hysteretic step-down, constant-current,
High-Brightness LED (HB LED) driver capable of driving
up to four, 1A LEDs. It provides an ideal solution for
interior/exterior lighting, architectural and ambient lighting,
LED bulbs, and other general illumination applications.
• 6.0V to 20V input voltage range
• High efficiency (>90%)
• ± 5% LED current accuracy
• High-side current sense
• Dedicated dimming control input
• Hysteretic control (no compensation!)
• 1A internal power switch
• Up to 1MHz switching frequency
• Adjustable constant LED current
• 5V on board regulator
The MIC3201 operates with an input voltage range from
6V to 20V. The hysteretic control gives good supply
rejection and fast response during load transients and
PWM dimming. The high-side current sensing and on-chip
current sense amplifier delivers LED current with ±5%
accuracy. An external high-side current sense resistor is
used to set the output current.
• Over temperature protection
• –40°C to +125°C junction temperature range
• Available in an 8-Pin ePAD SOIC package
The MIC3201 offers a dedicated PWM input (DIM) which
enables a wide range of pulsed dimming. A high switching
frequency operation up to 1MHz allows the use of smaller
external components minimizing space and cost.
The MIC3201 operates over a junction temperature range
of -40°C to +125°C and is available in an 8-pin ePAD
SOIC package.
Applications
• Architectural, industrial, and ambient lighting
• LED bulbs
• Indicators and emergency lighting
• Street lighting
Datasheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
• Channel letters
• 12V lighting systems (MR-16 bulbs, under cabinet
lighting, garden/pathway lighting)
_________________________________________________________________________________________________________________________
Typical Application
MIC3201 Step-down LED Driver Circuit
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
M9999-021011-B
February 2011
Micrel, Inc.
MIC3201
Ordering Information(1)
Part Number
MIC3201YME
Note:
Marking
Junction Temp. Range
Package
Lead Finish
Pb-Free
MIC3201YME
-40°C to +125°C
8-Pin ePAD SOIC
1. YME® is a GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
Pin Configuration
8-Pin ePAD SOIC (ME)
Pin Description
Pin Number Pin Name Pin Function
1
VCC
Voltage Regulator Output. The VCC pin supplies the power to the internal circuitry. The VCC in
the output of a linear regulator which is powered from VIN. A 1µF ceramic capacitor is
recommended for bypassing and should be placed as close as possible to the VCC and AGND
pins. Do not connect to an external load.
2
3
CS
Current Sense Input. The CS pin provides the high-side current sense to set the LED current
with an external sense resistor.
VIN
Input Power Supply. VIN is the input supply pin to the internal circuitry and the positive input to
the current sense comparator. Due to the high frequency switching noise, a 10µF ceramic
capacitor is recommended to be placed as close as possible to VIN and the power ground
(PGND) pin for bypassing. Please refer to layout recommendations.
4
5
AGND
EN
Ground pin for analog circuitry. Internal signal ground for all low power sections.
Enable Input. The EN pin provides a logic level control of the output and the voltage has to be
2.0V or higher to enable the current regulator. The output stage is gated by the DIM pin. When
the EN pin is pulled low, the regulator goes to off state and the supply current of the device is
greatly reduced (below 1µA). In the off state, the output drive is placed in a "tri-stated" condition,
where MOSFET is in an “off” or non-conducting state. Do not drive the EN pin above the supply
voltage.
6
7
DIM
PWM Dimming Input. The DIM pin provides the control for brightness of the LED. A PWM input
can be used to control the brightness of LED. DIM high enables the output and its voltage has to
be at least 2.0V or higher. DIM low disables the output, regardless of EN “high” state.
PGND
Power Ground pin for Power FET. Power Ground (PGND) is the ground path for the high current
hysteretic mode. The current loop for the power ground should be as small as possible and
separate from the Analog ground (AGND) loop. Refer to the layout considerations for more
details.
8
LX
Drain of Internal Power MOSFET. The LX pin connects directly to the inductor and provides the
switching current necessary to operate in hysteretic mode. Due to the high frequency switching
and high voltage associated with this pin, the switch node should be routed away from sensitive
nodes.
EP
GND
Connect to PGND.
M9999-021011-B
February 2011
2
Micrel, Inc.
MIC3201
Absolute Maximum Ratings(1)
Operating Ratings(2)
VIN, VCS to PGND/AGND................................-0.3V to +22V
VDIM, VEN to PGND/AGND..................................-0.3V to VIN
VLX to PGND/AGND ................................. -0.3V to VIN+1.0V
VCC to PGND/AGND .....................................-0.3V to +7.0V
VCS to VIN ...................................................................... 0.3V
VPGND to VAGND ...............................................-0.3V to +0.3V
Storage Temperature (Ts).........................–60°C to +150°C
Lead Temperature (Soldering, 10sec) ....................... 260°C
ESD Ratings (HBM)(3) ...... ................................………..2kV
(MM)(3)......................... ...........................100V
Supply Voltage (VIN).......................................... 6.0V to 20V
Junction Temperature (TJ) .........................-40°C to +125°C
Junction Thermal Resistance
SOIC (θJA)..........................................................41°C/W
SOIC (θJC).......................................................14.7°C/W
Electrical Characteristics(4)
VIN = 12V, VDIM = VEN = VIN, CVCC = 1µF, bold values indicate –40°C≤ TJ ≤ +125°C, unless noted.
Typical values are at TA = +25°C.
Symbol Parameter
Condition
Min
Typ
Max
20.0
1.75
1
Units
V
VIN
IS
Operating Input Voltage Range
6.0
Supply Current
LX open
1.2
mA
µA
mV
mV
mV
ns
ISD
Shut Down Supply Current
VEN = 0V TA = 25ºC
VIN - VCS
VCS(MAX) Sense Voltage Threshold High
206
171
224
189
VCS(MIN)
VHYS
Sense Voltage Threshold Low
Current Sense Hysteresis
VIN - VCS
35
100
60
VCS Rising
Current Sense Response Time
VCS Falling
ns
CS Pin Input Current
VIN - VCS = 200mV
3
µA
mΩ
MHz
V
RDSON
FMAX
VCC
ENHI
ENLO
Internal Switch RON
300
6
550
1.0
Maximum Switching Frequency
VCC Regulator
EN Input Voltage High
EN Input Voltage Low
EN Input Current High
EN Input Leakage Low
DIM Input Voltage High
DIM Input Voltage Low
DIM Input Current High
DIM Input Leakage Low
Maximum DIM Frequency
LX Pin Leakage Current
Over-Temperature Shutdown
Over-Temperature Shutdown Hysteresis
Start-up Time
2.0
2.0
V
0.4
50
1
V
VEN =12V
VEN = 0V
30
22
µA
µA
V
DIMHI
DIMLO
0.4
30
1
V
VDIM =12V
µA
µA
kHz
µA
ºC
VDIM= 0V
FDIM
20
VIN - VCS ≥ 250mV VLX=VIN
5
TLIM
165
20
TLIMHYS
ºC
From EN Pin going high,
DIM = 12V, CVCC = 1µF
300
µs
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
4. Specification for packaged product only.
M9999-021011-B
February 2011
3
Micrel, Inc.
MIC3201
Typical Characteristics
1 LED Efficiency
vs. Input Voltage
1 LED Current
vs. Input Voltage
2 LED Efficiency
vs. Input Voltage
90
1200
1000
800
600
400
200
0
100
90
80
70
60
50
40
30
20
10
0
1A
1A
80
70
1A
60
350mA
350mA
50
40
30
20
10
0
350mA
5
10
15
20
5
10
15
20
5
10
15
20
INPUT VOTLAGE (V)
INPUT VOTLAGE (V)
INPUT VOTLAGE (V)
Supply Current
vs. Input Voltage
Shutdown Current
vs. Input Voltage
2 LED Current
vs. Input Voltage
1200
1000
800
600
400
200
0
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0.050
0.045
0.040
0.035
0.030
0.025
0.020
0.015
0.010
0.005
0.000
1A
350mA
TA = 25°C
TA = 25°C
5
10
15
20
5
10
15
20
5
10
15
20
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOTLAGE (V)
VCC
vs. Input Voltage
Switching Frequency
vs. Input Voltage
Enable Threshold
vs. Input Voltage
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
800
700
600
500
400
300
200
100
0
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
RCS = 0.2ꢀ
L = 22µH
TA = 25°C
TA = 25°C
TA = 25°C
5
10
15
20
5
10
15
20
5
10
15
20
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
Current Sense Voltage
vs. Input Voltage
VCC
vs. ICC
Switch Voltage
vs. Switch Current
250
200
150
100
50
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
350
300
250
200
150
100
50
VCS(Max)
VCS(Min)
TA = 25°C
TA = 25°C
0
0
0
5
10
15
20
5
10
15
20
0
0.25
0.5
0.75
1
ICC (mA)
INPUT VOLTAGE (V)
SWITCH CURRENT (A)
M9999-021011-B
February 2011
4
Micrel, Inc.
MIC3201
RDSON
Thermal Shutdown
vs. Input Voltage
UVLO Threshold
vs. Temperature
vs. Input Voltage
180
160
140
120
100
80
6.0
5.0
4.0
3.0
2.0
1.0
0.0
400
350
300
250
200
150
100
50
ON
ON
OFF
OFF
60
40
IOUT = 1A @ 25°C
20
0
0
5
10
15
20
-40 -20
0
20 40 60 80 100 120
5
10
15
20
INPUT VOLTAGE (V)
TEMPERATURE (°C)
INPUT VOLTAGE (V)
Supply Current
vs. Temperature
Enable Threshold
vs. Temperature
TCASE @ 1.0A
vs. Input Voltage
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
60
50
40
30
20
10
0
ON
VIN = 12V
1 LED
OFF
-40 -20
0
20 40 60 80 100 120
-40 -20
0
20 40 60 80 100 120
5
10
15
20
TEMPERATURE (°C)
TEMPERATURE (°C)
INPUT VOTLAGE (V)
Switching Frequency
vs. Temperature
Low-Side MOSFET RDS(ON)
vs. Temperature
Shutdown Current
vs. Temperature
800
700
600
500
400
300
200
100
0
500
450
400
350
300
250
200
150
100
50
35
VIN = 12V
30
25
20
15
10
5
VIN = 12V
12V Input
RCS = 0.2ꢀ
L = 22µH
0
0
-40 -20
0
20 40 60 80 100 120
-40 -20
0
20 40 60 80 100 120
-40 -20
0
20 40 60 80 100 120
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
VCC
vs. Temperature
Current Sense Voltage
vs. Temperature
250
200
150
100
50
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
VC(Max)
VCS(Min)
VIN = 12V
VHYS
0
-40 -20
0
20 40 60 80 100 120
-40 -20
0
20 40 60 80 100 120
TEMPERATURE (°C)
TEMPERATURE (°C)
M9999-021011-B
February 2011
5
Micrel, Inc.
MIC3201
Functional Characteristics
M9999-021011-B
February 2011
6
Micrel, Inc.
MIC3201
M9999-021011-B
February 2011
7
Micrel, Inc.
MIC3201
Functional Diagram
Figure 1. MIC3201 Block Diagram
The frequency of operation depends upon input voltage,
total LEDs voltage drop, LED current and temperature.
The calculation for frequency of operation is given in
application section.
Functional Description
The MIC3201 is a hysteretic step-down regulator which
regulates the LED current over wide input voltage range
and capable of driving up to four, 1A LEDs in series.
The MIC3201 has an on board 5V regulator which is for
internal use only. Connect a 1µF capacitor on VCC pin to
analog ground.
The device operates from a 6V to 20V input voltage range,
and includes an integrated 1.0A power switch. When the
input voltage approaches 6V, the internal 5V VCC is
regulated and the integrated MOSFET is turned on if EN
pin and DIM pin are high. The inductor current builds up
linearly. When the CS pin voltage hits the VCS(MAX) with
respect to VIN, the internal MOSFET turns off and the
Schottky diode takes over and returns the current to VIN.
Then the current through inductor and LEDs starts
decreasing. When CS pin hits VCS(MIN), the internal
MOSFET turns on and the cycle repeats.
The MIC3201 has an EN pin which gives the flexibility to
enable and disable the output with logic high and low
signals.
The MIC3201 also has a DIM pin which can turn on and off
the LEDs if EN is in HIGH state. This DIM pin controls the
brightness of the LED by varying the duty cycle from 1% to
99%.
M9999-021011-B
February 2011
8
Micrel, Inc.
MIC3201
Application Information
The MIC3201 is a hysteretic step-down constant-current
High-Brightness LED (HB LED) driver. The internal block
diagram is shown in Figure 1. The MIC3201 is
composed of a current sense comparator, voltage and
current reference, 5V regulator, MOSFET driver, and a
MOSFET. Hysteretic mode control, also called bang-
bang control, is the topology that does not employ an
error amplifier, and instead uses an error comparator.
Frequency of Operation
To calculate the frequency spread across input supply:
dI
VL = L
dt
L is the inductance, dI is fixed (the value of the hysteresis)
VCS(MAX) − VCS(MIN)
dI =
RCS
The inductor current is controlled within a hysteretic
window. If the inductor current is too small, the power
MOSFET is turned on; if the inductor current is large
enough, the power MOSFET is turned off. It is a simple
control scheme with no oscillator and no loop
compensation. Since the control scheme does not need
loop compensation, it makes a design easy, and avoids
problems of instability.
VL voltage across inductor L which varies by supply.
For current rising (MOSFET is ON):
dI
tr = L
VL _RISE
where:
VL_RISE = VIN – ILED·RCS - VLED
Transient response to load and line variation is very fast
and only depends on propagation delay. This makes the
control scheme very popular for certain applications.
For current falling (MOSFET is OFF):
dI
tf = L
LED Current and RCS
VL _FALL
The main feature in MIC3201 is to control the LED
current accurately within ± 5% of set current. Choosing a
high-side RCS resistor helps for setting constant LED
current irrespective of wide input voltage range. The
following equation gives the RCS value:
where:
VL_FALL = VD + ILED·RCS + VLED
1
T = tr + tf , FSW
=
T
VCS(MAX) + VCS(MIN)
1
2
(V +ILED⋅RCS+V )•(V −ILED⋅RCS−V )
D
LED
IN
LED
RCS
=
(
)
F
=
SW
ILED
L⋅dI⋅(V +V )
D
IN
RCS (ꢀ)
ILED (A)
0.1
I2R (W)
0.0200
0.0400
0.0567
0.0691
0.0800
0.1000
0.1188
0.1372
0.1536
0.1782
0.2000
Size (SMD)
0402
0402
0402
0603
0603
0805
0805
0805
0805
0805
1206
Where
VD is Schottky diode forward drop
LED is total LEDs voltage drop
VIN is input voltage
LED is average LED current:
2.00
1.00
0.63
0.56
0.50
0.40
0.33
0.28
0.24
0.22
0.20
V
0.2
I
0.3
According to the above equation, choose the inductor to make
the operating frequency no higher than 1MHz.
0.35
0.4
Free Wheeling Diode
0.5
The free wheeling diode should have the reverse voltage
rating to accommodate the maximum input voltage. The
forward voltage drop should be small to get the lowest
conduction dissipation for high efficiency. The forward current
rating has to be at least equal to LED current. A Schottky
diode is recommended.
0.6
0.7
0.8
0.9
1.0
LED Ripple Current
The LED current is the same as inductor current. If LED ripple
current needs to be reduced then place a 10µF capacitor
across LED.
Table 1. Selecting RCS for LED Current
For VCS(MAX) and VCS(MIN) refer to the electrical
characteristic table.
M9999-021011-B
February 2011
9
Micrel, Inc.
MIC3201
PCB Layout Guideline
Output Capacitor
Warning!!! To minimize EMI and output noise, follow
these layout recommendations.
If LED ripple current needs to be reduced then place a 10µF
capacitor across LED. The capacitor must be placed as
close to the LED as possible.
PCB Layout is critical to achieve reliable, stable and
efficient performance. A ground plane is required to
control EMI and minimize the inductance in power,
signal and return paths.
Diode
Place the Schottky diode on the same side of the board as
the IC and input capacitor.
The following guidelines should be followed to insure
proper operation of the MIC3201 regulator.
The connection from the Schottky diode’s Anode to the IC
LX pin must be as short as possible.
IC
The diode’s Cathode connection to the RCS must be keep as
short as possible.
Use fat traces to route the input and output power lines.
The exposed pad (EP) on the bottom of the IC must be
connected to the ground.
RC Snubber
If a RC snubber is needed, place the RC snubber on the
same side of the board and as close to the Schottky diode
as possible.
Use four via to connect the EP to the ground plane.
Signal and power grounds should be kept separate and
connected at only one location.
RCS (Current Sense Resistor)
Input Capacitor
VIN pin and CS pin must be as close as possible to RCS.
Make a Kelvin connection to the VIN and CS pin respectively
for current sensing.
Place the input capacitors on the same side of the board
and as close to the IC as possible.
Keep both the VIN and PGND connections short.
Trace Routing Recommendation
Place several vias to the ground plane close to the input
capacitor ground terminal, but not between the input
capacitors and IC pins.
Keep the power traces as short and wide as possible. One
current flowing loop is during the MOSFET ON time, the
traces connecting the input capacitor CIN, RCS, LEDs,
Inductor, the MIC3201 LX and PGND pin and back to CIN.
The other current flowing loop is during the MOSFET OFF
time, the traces connecting RCS, LED, inductor, free wheeling
diode and back to RCS. These two loop areas should kept as
small as possible to minimize the noise interference,
Use either X7R or X5R dielectric input capacitors. Do not
use Y5V or Z5U type capacitors.
Do not replace the ceramic input capacitor with any
other type of capacitor. Any type of capacitor can be
placed in parallel with the input capacitor.
If a Tantalum input capacitor is placed in parallel with the
input capacitor, it must be recommended for switching
regulator applications and the operating voltage must be
derated by 50%.
Keep all analog signal traces away from the LX pin and its
connecting traces.
In “Hot-Plug” applications, a Tantalum or Electrolytic
bypass capacitor must be placed in parallel to ceramic
capacitor to limit the over-voltage spike seen on the
input supply with power is suddenly applied. In this case,
an additional Tantalum or Electrolytic bypass input
capacitor of 22µF or higher is required at the input power
connection if necessary.
Inductor
Keep the inductor connection to the switch node (LX)
short.
Do not route any digital lines underneath or close to the
inductor.
To minimize noise, place a ground plane underneath the
inductor.
M9999-021011-B
February 2011
10
Micrel, Inc.
MIC3201
Ripple Measurements
To properly measure ripple on either input or output of a
switching regulator, a proper ring in tip measurement is
required. Standard oscilloscope probes come with a
grounding clip, or a long wire with an alligator clip.
Unfortunately, for high frequency measurements, this
ground clip can pick-up high frequency noise and
erroneously inject it into the measured output ripple.
The standard evaluation board accommodates a home
made version by providing probe points for both the
input and output supplies and their respective grounds.
This requires the removing of the oscilloscope probe
sheath and ground clip from a standard oscilloscope
probe and wrapping a non-shielded bus wire around the
oscilloscope probe. If there does not happen to be any
non-shielded bus wire immediately available, the leads
from axial resistors will work. By maintaining the shortest
possible ground lengths on the oscilloscope probe, true
ripple measurements can be obtained.
Figure 2. Low Noise Measurement
M9999-021011-B
February 2011
11
Micrel, Inc.
MIC3201
Evaluation Board Schematic
M9999-021011-B
February 2011
12
Micrel, Inc.
MIC3201
Bill of Materials
Item
Part Number
Manufacturer
AVX(1)
Description
Qty.
12103D106KAT2A
GRM32DR71E106KA12L
C3225X7R1E106M
08053D105KAT2A
GRM216R61E105KA12D
C2012X7R1E105K
08055A271JAT2A
GQM2195C1H271JB01D
SS24-TP
10µF/25V, Ceramic Capacitor, X5R, Size 0805
10µF/25V, Ceramic Capacitor, X7R, Size 0805
10µF/25V, Ceramic Capacitor, X7R, Size 0805
1µF/25V, Ceramic Capacitor, X5R, Size 0805
1µF/25V, Ceramic Capacitor, X5R, Size 0805
1µF/25V, Ceramic Capacitor, X7R, Size 0805
Murata(2)
TDK(3)
AVX(1)
Murata(2)
TDK(3)
AVX(1)
Murata(2)
MCC(4)
C1, C2
2
C3
1
C4
D1
270pF/50V, Ceramic Capacitor NPO, Size 0805
40V, 2A, SMA, Schottky Diode
1
1
SS24
Fairchild(5)
SUMIDA(6)
Stackpole Electronics Inc(7)
Vishay(8)
L1
CDRH8D43NP-220NC
CSR 1/2 0.2 1% I
22µH, 2.6A, SMT, Power Inductor
0.2ꢀ Resistor, 1/2W, 1%, Size 1206
100kꢀ Resistor, 1% , Size 0805
2.2 Ohms Resistor, 1%, Size 0805
1
1
2
1
R1
R2, R3 CRCW08051003FKEA
R4
CRCW08052R20FKEA
Vishay(8)
High-Brightness LED Driver with High-Side
Current Sense
U1
MIC3201YME
Micrel, Inc.(9)
1
Notes:
1. AVX: www.avx.com
2. Murata: www.murata.com
3. TDK: www.tdk.com
4. MCC: www.mccsemi.com
5. Fairchild: www.fairchildsemi.com
6. Sumida Tel: www.sumida.com
7. Stackpole Electronics: www.seielect.com
8. Vishay: www.vishay.com
9. Micrel, Inc.: www.micrel.com
M9999-021011-B
February 2011
13
Micrel, Inc.
MIC3201
PCB Layout Recommendations
Top Assembly
Top Layer
Bottom Layer
M9999-021011-B
February 2011
14
Micrel, Inc.
MIC3201
Package Information
8-Pin ePAD SOIC (ME)
M9999-021011-B
February 2011
15
Micrel, Inc.
MIC3201
Recommended Landing Pattern
8-Pin ePAD SOIC
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This
information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry,
specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual
property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability
whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties
relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product
can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical
implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user.
A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to
fully indemnify Micrel for any damages resulting from such use or sale.
© 2009 Micrel, Incorporated.
M9999-021011-B
February 2011
16
相关型号：
©2020 ICPDF网 联系我们和版权申明