New Products, Tips and Tools for Power and Mobile Applications
Digital Microphones Improve
Sound Quality, Lower Power
Achieve better sound quality in mobile handset and notebook microphone
applications with Fairchild’s FAN3850x series of digital microphone pre-amplifiers.
These high performance analog mobile audio devices provide advanced noise
rejection capabilities as well as an easy interface to mobile handset processors.
The series includes:
• FAN3850A that features both 16dB and 19dB gain versions,
• FAN3850T offering 15dB gain and integrated negative temperature
coefficient to compensate for ECM positive temperature coefficient to
achieve a flat sensitivity response over temperature.
Both devices integrate a pre-amplifier, low drop-out regulator (LDO) and analog-
to-digital converter (ADC) that converts Electret Condenser Microphone (ECM)
outputs to digital pulse density modulation (PDM) data streams.
BENCHMarks
VOL. 1, 2012
™
Advantages
• Excellent signal-to-noise ratio
• Lower power compensation,
0.8mW
• <20μW power down mode
Applications
• Mobile handsets
• Notebook PC microphones
For more information, please visit:
www.fairchildsemi.com/pf/FA/FAN3850A.html
www.fairchildsemi.com/pf/FA/FAN3850T.html
90
80
SNR (dBa), THD (dB), SINAD (dB)
70
60
50
40
30
20
10
0
-10
-20
0.001
0.01
0.1
1
10
100
SNR (dBa)
THD (dB)
SINAD (dB)
Input Signal (mVpp)
FAN3850T 15dB SNR (dBa), THD (-dB), SINAD (dB) over Input Amplitude
Product
Number
FAN3850x
I
DD
(μA)
420
I
SLEEP
(μA)
1.4
SNR (dB)
62
THD (%)
0.01
120dB SPL
THD + N
(%)
3
ESD (HBM)
(kV)
7
V
DD
= 1.8V, F
CLOCK
= 2.4MHz, 94dBSPL
SINGLE-CHIP PWM SOLUTION
Single-Chip PWM Solution Saves Board Space
Designers who need to achieve lower standby power consumption in devices
such as notebooks, printers, LCD TVs, now have an industry-leading single-chip
solution with Fairchild’s FAN6756. Lower standby power in
75W
space-
constrained applications is achieved without additional external circuitry, complex
designs or higher costs. The single-chip solution is a highly integrated green-
mode PWM controller that significantly reduces standby losses in SMPS designs,
and eliminates up to 15 external components.
The FAN6756 also includes an innovative AX-CAP
™
discharge method that
minimizes losses in the EMI filter stage, while meeting the IEC61010-1 safety
requirement. This functionaity is achieved by eliminating the X-cap discharge
resistors and discharging X-cap energy through the HV pin when the power is
unplugged from the AC outlet.
Ideal for power supplies that demand extremely low standby power, the FAN6756
incorporates mWSaver
™
Technology. This technology allows the device to reduce
power losses not only in the controller, but also in the external circuits and
components. It also includes a proprietary deep burst mode technology that
reduces switching loss at no-load and light-load conditions.
Advantages
• Proven, reliable mWSaver
™
Technology
• Achieves <30mW no load/
standby power consumption
• Reduces up to 15 external
components
Applications
• Notebooks
• Game consoles
• Printer adapters
• LCD TVs
For more information, please visit:
www.fairchildsemi.com/pf/FA/FAN6756.html
www.fairchildsemi.com/mwsaver
FAN6756
5.4V
V
DD
Sensed Current
Signal
3R
Impedence
Modulator
Z
FB
2
V
FB
FB
C
FB
PWM
Comparator
1R
Deep Burst Mode Control Circuit
Product
Number
FAN6756MRMY
FAN6756MLMY
Protection*
OLP
A/R
L
OVP
L
L
OTP
L
L
SSCP
A/R
A/R
Max Power
(W) Rating
65
Feedback
Mode
Current
Protection
OLP, OCP,
OVP, OTP,
SSCP
Package
SOIC-8
*Auto Recovery Mode protection, L = Latch Mode protection.
OptoHiT
™
PHOTOTRANSISTOR OPTOCOUPLERS
Reliable Isolation and Minimized System
Failure with OptoHiT
™
Optocouplers
Realize increased design margins and stable parameters in high temperature
environments with Fairchild’s new FODM8801 OptoHiT
™
high temperature pho-
totransistor optocoupler. You’ll achieve high noise immunity and reliable isolation
at high operating temperatures, up to 125°C, as this new series implements
Fairchild’s proprietary OPTOPLANAR
®
coplanar packaging technology. In addi-
tion, the FODM8801 offers excellent CTR linearity and operates at a very low
input current (I
F
). The optocoupler consists of an aluminum gallium arsenide
(AlGaAs) infrared light emitting diode optically coupled to a phototransistor.
Because the FODM8801 is packaged in a compact, half-pitch, mini-flat, 4-pin
package (1.27mm lead pitch), benefits also include board space savings and
design flexibility, ultimately allowing for overall reductions in system cost.
Advantages
• Excellent CTR linearity at
high temperature
• CTR at very low input
current, I
F
(1mA, 1.6mA,
and 3mA)
• Small footprint: half-pitch
mini-flat package (MFP)
saves board real estate
for more flexibility and
overall systems cost savings
Applications
• Primarily suited for DC-DC
converters
• Ground loop isolation,
signal-to-noise isolation
• Communications:
adapters, chargers
• Consumer:
appliances, set-top boxes
• Industrial:
power supplies, motor control,
programmable logic control
For more information, please visit:
www.fairchildsemi.com/pf/FO/FODM8801A.html
www.fairchildsemi.com/products/opto/
Product
Number
1.2
V
CE
= 5V
1.0
NORMALIZED CTR @ 25°C
I
F
= 2mA
0.8
I
F
= 0.5mA
I
F
= 1mA
0.6
0.4
0.2
0
-40
-20
0
20
40
60
80
100 120 140
T
A
– AMBIENT TEMPERATURE (°C)
Normalized CTR vs. Ambient Temperature
CTR
(Min) @
I
F
= 1mA
80%
130%
200%
CTR
(Max) @
I
F
= 1mA
160%
260%
400%
BV
CEO
(Min)
BV
ECO
(Min)
t
ON
/t
OFF
(Max)
V
ISO
(Min)
T
OPR
(Min)
T
OPR
(Max)
FODM8801A
FODM8801B
FODM8801C
75V
7V
20μs
3750V
-40 °C
125 °C
LED LAMP DRIVER IC
Small-Spaced Dimming Challenges Solved
with LED Lamp Driver IC
With Fairchild’s FL7701 smart non-isolated Buck LED driver with power factor
correction, designers attain efficient dimming solutions that also fit within exist-
ing sockets. Because the need to work reliably in a small space while providing
high efficiency is imperative, the device uses a digital technique that allows it to
automatically detect the AC input voltage condition. A special internal reference
signal is then created, resulting in high power factor correction. The FL7701 will
work from a DC input voltage condition, automatically sensing AC versus DC
input voltage conditions. It also combines high functional density to create the
smallest form factor and allows designers to save up to 20% BOM costs and up
to 60% board space savings.
The LED driver provides energy savings that meet the most stringent worldwide
regulations, such as Energy Star
®
Designers also benefit from the high degree
.
of integration offered by the FL7701. The result is increased luminary lifespan
to more than five years (current solution only achieves three years.) And reli-
ability is also improved since no electrolytic capacitors for the input, output or
the FL7701 V
DD
supply are required.
Advantages
• High functional density in a
small form factor
• Up to 60% board space
savings compared to other
solutions
• Up to 20% lower bill of
material costs compared
to other solutions
• Digital power factor (PF)
realization greater than 0.9
• Lower total harmonic
distortion (THD)
• 90% electrical efficiency
• Meets worldwide Energy Star
®
regulations
Applications
• Decorative lighting
• Low-power lighting
For more information, please visit:
www.fairchildsemi.com/pf/FL/FL7701.html
www.fairchildsemi.com/ledlighting
Typical application
Engineering
Connections
Need to Design a Dimmable LED Lamp
Small Enough to Fit Existing Sockets?
Read the latest in our blog at
www.fairchildsemi.com/engineeringconnections.
Product
Number
FL7701
Topology
Non-Isolation
PFC Buck
PFC
Yes
Dimming
Yes
CC Variance
(%)
3
Frequency
(kHz)
Variable
Package
SOIC-8
FLYBACK CONTROLLERS
Achieve Industry-Best Energy
Savings for Flyback Designs
Designers using flyback topology can now achieve optimum converter perfor-
mance with Fairchild’s expansive portfolio of flyback controllers. Enabling power
savings, achieving high-power density and meeting energy standards, the port-
folio includes:
• The FAN302HL mWSaver
™
Technology PWM controller, a highly
integrated device that includes a proprietary burst-mode function with low
operation current and minimizes standby power consumption.
• The dual switch flyback solution for 75W~230W applications and consists
of the FAN6920MR integrated critical mode PFC and quasi-resonant
current mode PWM controller, the FAN7382 gate driver, in tandem with
the FAN6204 secondary synchronous rectifier controller for flyback
topology and forward freewheeling rectification.
• The FAN6756 mWSaver
™
Technology PWM controller, dramatically
reduces standby and no-load power consumption, enabling conformance
to worldwide standby mode efficiency guidelines.
In addition, Fairchild offers the Power Supply WebDesigner (PSW) online design
and simulation tool that takes your specifications and provides a complete
primary-side regulated (PSR) flyback converter or secondary-side regulated
(SSR) flyback converter designs in minutes—at no expense.
Advantages
• FAN302HL
• 8mW standby
• 15W chargers
• PSR for CC & SSR for CV
• mWSaver™ Technology
• FAN6920MR, FAN7382, FAN6204
• Dual-switch QR + CRM
PFC + HV half-bridge driver
+ SR control
• Exceeds 2013 ErP
no load spec
• mWSaver™ Technology
• FAN6756, FAN6204
• PWM controller +
SR controller
• 90+% efficiency
• 26mW standby
• mWSaver™ Technology
Applications
• Adapters/converters for mobile
phones and firewalls, tablets,
PCs and large flat panel TVs
For more information, please visit:
www.fairchildsemi.com/pf/FA/FAN302HL.html
www.fairchildsemi.com/pf/FA/FAN6920MR.html
www.fairchildsemi.com/pf/FA/FAN7382.html
www.fairchildsemi.com/pf/FA/FAN6756.html
www.fairchildsemi.com/pf/FA/FAN6204.html
www.fairchildsemi.com/powersupplywebdesigner
www.fairchildsemi.com/flybackconverter
75W
FAN6756 + FAN6204
•
PWM controller +
SR controller
•
90+% efficiency
•
≤26mW
standby
•
mWSaver Technology
TM
Energy-Efficient Controllers for Flyback Designs
200W
Power level vs. efficiency vs. standby power
100%
The industry’s best efficiency and standby power
combination for each power rating.
FAN6920MR + FAN6204
+ FAN7382
•
Dual-switch QR + CRM
PFC + HV half-bridge driver
+ SR control
•
Exceeds 2013 ErP no load spec
•
mWSaver Technology
TM
95%
90%
FAN6756
•
Single-chip solution
•
Ideal for
≤75W
adapters
•
≤26mW
standby
•
mWSaver Technology
TM
FAN6862/63
•
Cost-effective solution
•
≤300mW
standby
•
85+% efficiency
(19V, 40W)
FAN6300A/H
•
QR current
mode solution
•
85+% efficiency, 19V
•
≥100W
range
85%
FSB127H
15W
FAN302HL
•
≤8mW
standby
•
≤15W
chargers
•
PSR for CC & SSR for CV
•
mWSaver Technology
TM
•
•
•
•
PWM + 700V MOSFET
Single-chip solution
≤40mW
standby
mWSaver Technology
TM
80%
FSQ500
FSL116HR
FSL206MR
•
Integrated 650V
SenseFET
•
•
•
•
Integrated 700V SenseFET
6.5W adapter power
≤150mW
standby
70+% efficiency
Engineering
Connections
Power Supply WebDesigner
Blog and Podcast
Save engineering time and costs with
Power Supply WebDesigner—without
being a power expert. Find out how
in our blog, or listen to our podcast, at
www.fairchildsemi.com/engineeringconnections.
75%
10mW
30mW
100mW
300mW
70%
500mW
S TA N D B Y P O W E R C O N S U M P T I O N ( 2 3 0 V
A C
)
O PE RATIN G E FF ICIE NCY (10 0V
A C
)
POWER LEVEL
LED专区
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