MAX16840 General Description Benefits and Features

MAX16840 General Description Benefits and Features
EVALUATION KIT AVAILABLE
MAX16840
LED Driver with Integrated MOSFET
for MR16 and Other 12V AC Input Lamps
General Description
Benefits and Features
The IC can be used in buck, boost, and buck-boost
topologies and features. It has an integrated 0.2I (max),
48V switching MOSFET.
●● Minimal Component Count Saves Cost and Space
• Integrated 0.2Ω (max) 48V Switching MOSFET
The MAX16840 is an LED driver IC for lighting applications. It includes all the necessary features to design lowcomponent-count LED drivers for 12V AC and 24V AC
input (e.g., MR16) light bulbs. A proprietary input-current
control scheme allows LED lamps based on this device
to be compatible with electronic transformers, and dimmable with standard trailing-edge dimmers (where electronic transformers are present).
The IC uses constant-frequency average current-mode
control. It senses the input current through the voltage
at the FB pin, and regulates its average. An input pin
(REFI) allows the setting of the input-current level. When
the voltage at this pin is set below a certain threshold, the
input current is proportional to this voltage, while when
that voltage is beyond the threshold, the input current is
set at a fixed, predefined level. This nonlinear behavior of
REFI allows its use to achieve thermal foldback, by connecting it to an NTC resistor.
The IC also features an internal overvoltage protection on
the IN pin to protect the internal switching MOSFET from
damage if the LED string is open or if the voltage on the
LED string is too high.
The IC has a separate EXT pin that can be used to guarantee that there is a kick-start of current at turn-on for lowinput voltages for proper operation with electronic transformers. EXT drives an external npn transistor. Once the
UVLO threshold of 5.5V is crossed on IN, EXT is pulled
to ground and the external npn transistor is turned off.
The IC is available in a 3mm x 3mm, 10-pin TDFN power
package, and is rated over the -40NC to +125NC operating temperature range.
Applications
MR16 and Other 12V AC or DC Input LED
Lighting Applications
●● Cost-Effective Solution for MR16 and Other SSL
Applications
• Proprietary Input Current-Control Scheme to
Achieve Electronic Transformer Compatibility
and Dimmability
• Buck, Boost, SEPIC, and Buck-Boost
Topologies
• Analog Dimming
●● Protection Features and Wide Operating Temperature
Range Improves Reliability
• Thermal-Foldback Protection
• Output Overvoltage Protection
• Internal Overtemperature Protection
• Available in a 10-Pin Thermally Enhanced TDFN
Package
• Operation Over -40°C to +125°C Temperature Range
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX16840ATB+
-40NC to +125NC
10 TDFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Typical Operating Circuit
LEDL2
R3
L1
12V AC
C2
DRAIN
BD1
IN
REFI
EXT
C1
MAX16840
COMP
C4
R2
19-5671; Rev 4; 1/15
D1
SOURCE
FB
GND
R1
LED+
MAX16840
LED Driver with Integrated MOSFET
for MR16 and Other 12V AC Input Lamps
Absolute Maximum Ratings
IN, DRAIN to GND..................................................... -0.3V, +52V
EXT, COMP, REFI to GND........................................ -0.3V, +6.0V
FB, SOURCE to GND............................................... -0.3V, +1.5V
Maximum RMS Current, FB, SOURCE to GND.....................0.8A
Maximum RMS Current Through DRAIN and SOURCE....... Q2A
Continuous Power Dissipation (TA = +70NC)
TDFN (derate 24.4mW/NC above +70NC)...................1951mW
Any Pin to Any Pin ESD Rating................................ ±2kV (HBM)
Operating Temperature Range......................... -40NC to +125NC
Maximum Junction Temperature......................................+150NC
Storage Temperature Range............................. -65NC to +150NC
Lead Temperature (soldering, 10s).................................+300NC
Soldering Temperature (reflow).......................................+260NC
Package Thermal Characteristics (Note 1)
TDFN
Junction-to-Ambient Thermal Resistance (BJA).......... 41NC/W
Junction-to-Case Thermal Resistance (BJC)................. 9NC/W
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
Electrical Characteristics
(VIN = 12V; VEXT = VSOURCE = VFB = VGND = 0V; COMP, REFI, and DRAIN = open; TA = TJ = -40NC to +125NC, unless otherwise
noted. Typical values are at TA = +25NC.) (Note 2)
PARAMETER
Operating Voltage Range
SYMBOL
VIN
CONDITIONS
MIN
When MOSFET fully on
IN Supply Current
Undervoltage Lockout
IIN
UVLOIN
UVLO Hysteresis
Overvoltage Protection on IN
When MOSFET switching, VCOMP = 2V,
drain to 5V through 50I IN rising
5
VOVP
IN rising
43.6
270
Ramp P-P Voltage
FB Average Voltage
COMP Sink Current
COMP Source Current
Power Switch On-Resistance
Switch Leakage Current
UNITS
48
V
1
2
1.5
3
5.6
6.1
46
gm
A
ISINK
ISOURCE
RDSON
ILEAK
300
48
196
-40°C P TA P +125NC
190
200
V
V
V
330
2
TA = +25NC
mA
mV
1.2
Switching Frequency
No-Load Gain
MAX
200
OVP Hysteresis
Transconductance
TYP
6.5
kHz
V
204
210
mV
550
FS
75
dB
VCOMP = 2V, VFB = 0.65V
150
250
350
FA
VCOMP = 2V, VFB = 0V
IDS = 1A
70
115
160
FA
0.1
0.2
I
25
FA
VDRAIN = 48V, VCOMP = 0V
DRAIN Rise Time
tRDRAIN
IDS = 1A
10
ns
DRAIN Fall Time
tFDRAIN
IDS = 1A
10
ns
SOURCE Limit Threshold
www.maximintegrated.com
VSOURCETH SOURCE connected to FB
0.66
0.72
0.78
V
Maxim Integrated │ 2
MAX16840
LED Driver with Integrated MOSFET
for MR16 and Other 12V AC Input Lamps
Electrical Characteristics (continued)
(VIN = 12V; VEXT = VSOURCE = VFB = VGND = 0V; COMP, REFI, and DRAIN = open; TA = TJ = -40NC to +125NC, unless otherwise
noted. Typical values are at TA = +25NC.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
SOURCE Current-Limit
Comparator Propagation Delay
FB Input Bias Current
MAX
25
IFB
VFB = 0V and VFB = 0.3V
-1
FB Current-Limit Comparator
Leading-Edge Blanking
REFI Source Current
VREFI = 1.224V
47.5
Foldback Kick in Threshold
Falling on REFI
VREFI = 1.15V
FB Average Voltage During
Foldback
TYP
UNITS
ns
+1
50
FA
ns
50
52.5
FA
1.135
1.2
1.255
V
178
189
201
VREFI = 1V
153
164.5
176
VREFI = 0.8V
120
132
143
FB Average Voltage to REFI
Gain
VREFI = 1V
EXT Drive Current
VIN = 2V, VEXT = 1V
EXT Pulldown Resistance
mV
6.075
12.5
40
5
10
mA
20
kI
Thermal-Shutdown Temperature
Temperature rising
165
NC
Thermal Shutdown Hysteresis
15
NC
Note 2: All devices are 100% tested at TA = TJ = +25NC. Limits over temperature are guaranteed by design.
www.maximintegrated.com
Maxim Integrated │ 3
MAX16840
LED Driver with Integrated MOSFET
for MR16 and Other 12V AC Input Lamps
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
1.2
1.5
180
IQ (mA)
1.0
IQ (mA)
VFB (mV)
MAX16840 toc03
1.4
190
2.0
MAX16840 toc02
1.6
MAX16840 toc01
200
IQ vs. VIN
IQ vs. TEMPERATURE
VFB vs. DUTY CYCLE FOR BUCK-BOOST
210
0.8
1.0
0.6
170
0.5
0.4
160
0.2
0
150
30
40
50
60
70
80
90
100
10
35
60
85
0
110
5
VIN (V)
OSCILLATOR FREQUENCY
vs. TEMPERATURE
ULVOIN vs. TEMPERATURE
5.7
VIN RISING AND FALLING
250
200
150
100
MAX16840 toc05
5.8
MAX16840 toc04
300
fSW (kHz)
10 15 20 25 30 35 40 45 50
TEMPERATURE (°C)
DUTY CYCLE (%)
50
5.6
5.5
5.4
5.3
5.2
VIN RISING
5.1
VIN FALLING
5.0
0
10
35
60
85
10
110
35
60
85
110
TEMPERATURE (°C)
TEMPERATURE (°C)
VFB vs. TEMPERATURECOMPATIBILITY MODE
VFB vs. VREFI
195
190
MAX16840 toc07
250
MAX16840 toc06
200
200
180
VFB (mV)
VFB (mV)
185
175
170
150
100
165
160
50
155
150
10
35
60
85
TEMPERATURE (°C)
www.maximintegrated.com
110
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
VREFI (V)
Maxim Integrated │ 4
MAX16840
LED Driver with Integrated MOSFET
for MR16 and Other 12V AC Input Lamps
Pin Configuration
TOP VIEW
DRAIN
1
DRAIN
2
IN
3
EXT
4
COMP
5
+
MAX16840
EP
10
SOURCE
9
SOURCE
8
FB
7
GND
6
REFI
TDFN
Pin Description
PIN
NAME
1, 2
DRAIN
3
IN
4
EXT
5
COMP
FUNCTION
Drain of the Internal Switching MOSFET
Input. Connect to LED string anode in boost and buck-boost configuration to get OVP protection
during open LED. Bypass it with a sufficient capacitor not to allow IN to go below 6.5V in buck
applications.
Base Drive for External Bipolar Until Internal Driver Starts Switching for the First Time After Power-Up
Compensation Component Connection for the Switching Stage. Connect a suitable RC network to
ground. This is the output of the gm amplifier
6
REFI
Analog Dimming and Thermal Foldback. The IC sources 50µA current out of this pin. Whenever this
pin voltage is > 1.2V, the FB voltage is regulated to internal 200mV reference. Whenever this pin
voltage < 1.2V, the FB voltage is regulated to VREFI/6. Leave this pin unconnected to disable this
foldback feature.
7
GND
Ground
8
FB
9, 10
SOURCE
—
EP
www.maximintegrated.com
Current-Sense. This pin includes a 5kI/4pF RC filter at its input to average the current information
over the switching cycle. Connect this pin directly to SOURCE.
Source of the Internal Switching MOSFET
Exposed Pad. Connect EP to the ground plane for heatsinking. Do not use the EP as the only
electrical connection to ground.
Maxim Integrated │ 5
MAX16840
LED Driver with Integrated MOSFET
for MR16 and Other 12V AC Input Lamps
Functional Diagram
IN
200mV
I0
5V
50µA
IN
I1
1/6
LDO +
BANDGAP
S
1.2V
5V
BG
UVLO
POK
EXT
REFI
gm
5kI
PWMC
DRAIN
4pF
COMP
0.65V
2VP-P
DRIVER
CSLIMIT
SOURCE
OSCILLATOR
GND
50ns
BLANKING
FB
IN
BG
OVP
MAX16840
Detailed Description
The MAX16840 is an average current-mode control LED
driver IC for buck, boost, and buck-boost topologies in
low-voltage SSL applications. The IC has an integrated
0.2I (max), 48V switching MOSFET that allows the
device to be used in lighting applications for MR16 and
other SSL applications. The LED driver uses constantfrequency average current-mode control to control the
duty cycle of the integrated switching MOSFET. The IC
has all the necessary features required for MR16 lighting
applications using LEDs. The IC uses an input-current
control scheme to achieve power factor correction. This
feature allows the IC to be compatible with electronic
transformers and dimmable with trailing-edge (for electronic transformers).
www.maximintegrated.com
The switch current is sensed on FB. The voltage on FB
goes through an RC filter as shown in the Functional
Diagram. This voltage is then fed to the negative input
of a transconductance amplifier. The positive input of
the gm amplifier is the programmed input current level.
The output voltage of the gm amplifier is compared with
a ramp at the switching frequency to set the duty cycle.
The switching frequency is set at 300kHz. The average
current-mode controller inside the IC regulates the input
current. The IC also features an internal overvoltage
protection of 46V on IN to protect the internal switching
MOSFET from damage if the LED string is open or if the
voltage on the LED string is too high.
Maxim Integrated │ 6
MAX16840
The IC has a control pin, REFI, to program the input
current. The IC regulates the average voltage on FB to
200mV if REFI is left open. A control voltage on REFI can
be used to control the input current. The average voltage
on FB is regulated to VREFI/6, where VREFI is the voltage
on REFI. The linear control of the FB voltage ceases once
the voltage on REFI exceeds 1.2V. Once the voltage
increases beyond 1.2V, the voltage on FB is regulated
to 200mV. REFI has an internal current source of 50FA
and the voltage on REFI can also be set with a resistor to
ground on REFI. This pin can also be used with an NTC
resistor on the pin to achieve thermal foldback.
The IC has a separate EXT pin that can be used to guarantee that there is a kick-start of current at turn-on for
low-input voltages for proper operation with electronic
transformers. EXT drives an external npn transistor. Once
the regulator MOSFET switches for the first time, after the
IN voltage has passed the 5.5V UVLO threshold, EXT is
pulled to ground and the external npn transistor is turned
off.
Internal Oscillator
The IC has an internal oscillator with a fixed switching
frequency of 300kHz.
Input Voltage (IN)
The IC is powered by the voltage on IN. The operating voltage range on IN is from 6.5V to 48V. An internal
UVLO is set at 5.6V. Below 5.4V, there is no switching
of the internal power MOSFET and the gate driver for
the MOSFET is low. The typical hysteresis of the UVLO
threshold is 200mV. There is an internal LDO of 5V that is
used to power all the internal circuitry and the gate driver
for the internal switching MOSFET. An internal overvoltage protection on IN stops switching once the voltage on
IN exceeds 46V. The switching of the internal MOSFET
ceases once the rising voltage on IN exceeds 46V and
stays off until the voltage on IN drops by 1.2V from the
OVP threshold of 46V.
www.maximintegrated.com
LED Driver with Integrated MOSFET
for MR16 and Other 12V AC Input Lamps
External BJT Driver (EXT)
EXT is a separate driver for an external npn transistor
that is used to drive an external resistive load when the
input voltage on IN is below the UVLO. This is useful for
operation with electronic transformers at low-input voltages. The minimum current capability of this pin is 20mA.
Internal Switching MOSFET
The IC has an integrated switching MOSFET with a maximum RDSON of 0.2I at +125NC. The typical RDSON at
+25NC is 0.1I. This allows the IC to be used in a boost
LED driver for power levels up to 20W and for buck-boost
applications in MR16s for power levels up to 7W. The
maximum voltage rating of the MOSFET is 48V operation. The drain of the internal MOSFET is connected to
the DRAIN pin and the source of the internal MOSFET is
connected to the SOURCE pin.
Current Sense (FB)
The source of the internal MOSFET is connected to
SOURCE, so a current-sense resistor must be connected
between SOURCE and ground and the current information is read by FB, so SOURCE must be connected to FB.
The set point of the current is determined by REFI. If REFI
is left open, the average current-sense voltage on FB is
regulated by the IC’s control loop to 200mV. There is a
separate peak-limit comparator that terminates switching
every cycle if the voltage on FB exceeds 650mV. This
comparator has a leading-edge blanking time of 50ns.
Control Loop
The IC uses an average current-mode control scheme
to regulate the input current (Figure 1). The control loop
regulates the average voltage on FB. An internal RC filter
removes current spikes appearing on this pin. Additional
filtering can be added if necessary. The current-regulation loop consists of the current-sense resistor RCS, the
RC filter shown in Figure 1, the transconductance error
amplifier (gm), an oscillator providing the 300kHz ramp,
the control voltage on the positive input of the gm amplifier, and the PWM comparator (PWMC).
Maxim Integrated │ 7
MAX16840
LED Driver with Integrated MOSFET
for MR16 and Other 12V AC Input Lamps
L1
INPUT
COMP
RCF
CP
CZ
LED+
MAX16840
CONTROL
VOLTAGE
gm
PWMC
2VP-P
DRIVER
5kI
10pF
SOURCE
FB
RCS
Figure 1. Control Loop
Peak-Limit Comparator
Current-Reference Input (REFI)
The IC has a peak-limit comparator that limits the peak
current in the switching MOSFET. If the current-sense
voltage on FB exceeds 0.65V, the peak-limit comparator
terminates switching for that switching cycle. This limits
the peak current in the switching MOSFET and the inductor during transients.
The IC has a current-reference input (REFI). For VREFI >
1.2V, an internal reference sets the input average current
to 200mV/RCS. For VREFI < 1.2V, the input current is
reduced proportionally to VREFI, and it can be reduced
down to zero. The maximum withstand voltage of this
input is 6V. REFI has an internal current source of 50FA,
and the voltage on REFI can also be set with a resistor to
ground on REFI. This pin can also be used with an NTC
resistor on the pin to achieve thermal foldback.
PWM Comparator
The PWM comparator (PWMC) determines the on-time of
the switching MOSFET on a cycle-by-cycle basis by comparing the output of the gm amplifier to a 2VP-P ramp signal. At the start of each clock cycle, an RS flip-flop resets
and the gate driver turns on the switching MOSFET. The
comparator sets the flip-flop as soon as the ramp signal
exceeds the COMP voltage, thus terminating the on cycle.
www.maximintegrated.com
Maxim Integrated │ 8
MAX16840
LED Driver with Integrated MOSFET
for MR16 and Other 12V AC Input Lamps
L2
D1
R3
L1
DRAIN
BD1
12V AC
LED+
REFI
EXT
C1
IN
MAX16840
COMP
C3
LED-
SOURCE
C4
GND
FB
R1
R2
Figure 2. Boost LED Driver
Applications information
Boost Configuration
In MR16 and other 12V AC input applications, the boost
configuration is used when the LED string voltage
exceeds 18V. This means that, in general, if the number
of LEDs in series in the application is greater than or
equal to 6 LEDs, the IC can be used in the boost configuration to provide the best efficiency. Figure 2 shows a
boost MR16 application. The number of LEDs can range
from 6 to 10 LEDs. The maximum voltage across the LED
string should not exceed 40V.
In the boost configuration, the current in the inductor is
the same as the current in the current-sense resistor R1.
Resistor (R1)
The current in resistor R1 is the same as the current in
inductor L2. If the desired maximum output power with
12V AC at 50Hz or 60Hz is POUT, the input power PIN
is given:
PIN = POUT/n
where n is the efficiency. The input current is given by:
IIN = PIN/10.8V
Resistor R1 is then given by:
R1 = 0.2V/IIN
where R1 is in ohms and IIN is in amps.
Boost Inductor (L2)
For optimum efficiency, the boost inductor must be operating in continuous-conduction mode. The maximum
www.maximintegrated.com
peak current in the inductor occurs at the peak of the
highest input voltage. The P-P ripple at this input voltage
is ∆IL. The highest input voltage is 13.2V AC, which is
10% higher than the typical value.
The peak current in the inductor is:
IPK = IIN + 0.5∆IL
The output voltage of the LED string is given by VLED. As
a first-order approximation, the LED voltage is assumed
constant. The duty cycle at the peak of the input voltage
is therefore:
13.2V × 2
18.66V
=
D MIN =
1−
1−
VLED
VLED
The percentage P-P ripple is typically selected in the 30%
to 60% range of the maximum input current. Assuming a
60% P-P inductor-current ripple, the maximum inductor
current is given by:
IPK = 1.3IINMAX
The minimum inductor value is given by:
L MIN =
18.66V × D MIN
0.6IINMAX × 300kHz
where the switching frequency is 300kHz. The saturation
current of the inductor should be higher than P-P and the
minimum value of the inductor at IP-P should exceed LMIN.
The temperature of the inductor can be in the +90NC to
+100NC range in the application and the losses should
be estimated at these elevated temperatures.
Maxim Integrated │ 9
MAX16840
LED Driver with Integrated MOSFET
for MR16 and Other 12V AC Input Lamps
Buck-Boost Configuration
Boost Diode (D1)
A Schottky diode must be used as rectifier diode D1 to
reduce power dissipation. The voltage rating of diode
D1 must be greater than the maximum output voltage.
Choose a diode that minimizes dissipation at temperatures in the +90N to +100NC range. The diode should be
selected to minimize reverse leakage at the maximum
output voltage while minimizing forward losses when the
diode is conducting.
In MR16 applications, the buck-boost configuration is
used when the number of LEDs is in the 3-to-5 LED
range. Figure 3 shows the schematic of a buck-boost
LED driver. The maximum voltage on LED+ should not
exceed 40V.
Resistor (R1)
If the desired maximum output power with 12V AC at
50Hz or 60Hz is POUT, the input power PIN is given:
Loop Compensation (R2, C4)
PIN = POUT/n
where n is the efficiency. The input current is given by:
The crossover frequency of the loop must be maximized
to get the optimum performance. The maximum value of
R2 is given by:
2 × 300kHz × L2
R2 MAX
in kΩ
=
R1× VLED × g m
IIN = PIN/12V
The resistor R1 is then given by:
R1 = 0.2V/IIN
where R1 is in ohms, VLED is in volts, gm is the transconductance of the error amplifier in FS, and the value of the
inductor L2 is in FH. Choose a value of R2 20% lower
than the above value.
where R1 is in ohms and IIN is in amps.
Buck-Boost Inductor (L2)
For optimum efficiency, the inductor must be operating
in continuous-conduction mode. The maximum peak
current in the inductor occurs at the peak of the highest
input voltage. The P-P ripple at this input voltage is DIL.
The maximum input current occurs at the highest input
voltage. Typically, the highest input voltage is 13.2V AC,
which is 10% higher than the typical value.
The zero from C4, R2 should be placed at:
fz =
R1× VLED × g m × R2
12V × π × L
Therefore, C4 is given by:
C4 =
1
2 × π × fz × R2
The peak current in the inductor is:
IPK = IINDMIN + 0.5∆IL
LEDL2
D1
R3
L1
12V AC
C2
LED+
DRAIN
BD1
IN
REFI
EXT
C1
MAX16840
COMP
C4
SOURCE
FB
GND
R1
R2
Figure 3. Buck-Boost LED Driver
www.maximintegrated.com
Maxim Integrated │ 10
MAX16840
LED Driver with Integrated MOSFET
for MR16 and Other 12V AC Input Lamps
The output voltage of the LED string is given by VLED. As
a first-order approximation, the LED voltage is assumed
constant. The duty cycle at the peak of the input voltage
is, therefore:
13.2V × 2
18.66V
=
D MIN =
1−
1−
V
VLED + 13.2V × 2
LED + 18.66V
The percentage P-P ripple is typically selected in the 30%
to 60% range of the maximum input current. Assuming a
60% P-P inductor-current ripple, the maximum inductor
current is given by:
IP-P = 1.3IIN
The minimum inductor value is given by:
L MIN =
18.66V × D MIN 2
0.6IIN × 300kHz
where the switching frequency is 300kHz. The saturation
current of the inductor should be higher than IP-P and the
minimum value of the inductor at IP-P should exceed LMIN.
www.maximintegrated.com
Output Diode (D1)
A Schottky diode must be used as rectifier diode D1 to
reduce power dissipation. The voltage rating of diode D1
must be greater than the maximum peak input voltage
plus the maximum output voltage. Choose a diode that
minimizes dissipation at temperatures in the +90NC to
+100NC range. The diode should be selected to minimize
reverse leakage at the maximum output voltage while
minimizing forward losses when the diode is conducting.
Package Information
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a
“+”, “#”, or “-” in the package code indicates RoHS status only.
Package drawings may show a different suffix character, but the
drawing pertains to the package regardless of RoHS status.
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
10 TDFN-EP
T1033+1
21-0137
90-0003
Maxim Integrated │ 11
MAX16840
LED Driver with Integrated MOSFET
for MR16 and Other 12V AC Input Lamps
Revision History
REVISION
NUMBER
REVISION
DATE
PAGES
CHANGED
0
12/10
Initial release
1
2/11
Changed minimum temperature to -40°C
2
5/11
Added missing dots in Typical Operating Circuit and Figure 3
3
8/11
Added missing dots in Typical Operating Circuit and Figure 3 and updated PWMC
block in Figure 1
4
1
DESCRIPTION
Updated Benefits and Features section
—
1, 2, 3, 8
1, 10
1, 8, 10
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
© 2015 Maxim Integrated Products, Inc. │ 12
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement